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e53b6e56 | 1 | /* Subroutines for insn-output.cc for Tensilica's Xtensa architecture. |
7adcbafe | 2 | Copyright (C) 2001-2022 Free Software Foundation, Inc. |
03984308 BW |
3 | Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
2f83c7d6 | 9 | Software Foundation; either version 3, or (at your option) any later |
03984308 BW |
10 | version. |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
03984308 | 20 | |
8fcc61f8 RS |
21 | #define IN_TARGET_CODE 1 |
22 | ||
03984308 BW |
23 | #include "config.h" |
24 | #include "system.h" | |
4977bab6 | 25 | #include "coretypes.h" |
c7131fb2 | 26 | #include "backend.h" |
e11c4407 AM |
27 | #include "target.h" |
28 | #include "rtl.h" | |
c7131fb2 AM |
29 | #include "tree.h" |
30 | #include "gimple.h" | |
e11c4407 | 31 | #include "cfghooks.h" |
c7131fb2 | 32 | #include "df.h" |
4d0cdd0c | 33 | #include "memmodel.h" |
e11c4407 AM |
34 | #include "tm_p.h" |
35 | #include "stringpool.h" | |
314e6352 | 36 | #include "attribs.h" |
e11c4407 | 37 | #include "optabs.h" |
03984308 | 38 | #include "regs.h" |
e11c4407 | 39 | #include "emit-rtl.h" |
03984308 | 40 | #include "recog.h" |
e11c4407 AM |
41 | #include "diagnostic-core.h" |
42 | #include "cfgrtl.h" | |
03984308 | 43 | #include "output.h" |
40e23961 | 44 | #include "fold-const.h" |
d8a2d370 DN |
45 | #include "stor-layout.h" |
46 | #include "calls.h" | |
47 | #include "varasm.h" | |
36566b39 | 48 | #include "alias.h" |
36566b39 | 49 | #include "explow.h" |
36566b39 | 50 | #include "expr.h" |
03984308 | 51 | #include "reload.h" |
540eaea8 | 52 | #include "langhooks.h" |
45b0be94 | 53 | #include "gimplify.h" |
9b2b7279 | 54 | #include "builtins.h" |
6383386a FY |
55 | #include "dumpfile.h" |
56 | #include "hw-doloop.h" | |
2f36a994 | 57 | #include "rtl-iter.h" |
ccd02e73 | 58 | #include "insn-attr.h" |
85d53c1d | 59 | |
994c5d85 | 60 | /* This file should be included last. */ |
d58627a0 | 61 | #include "target-def.h" |
03984308 BW |
62 | |
63 | /* Enumeration for all of the relational tests, so that we can build | |
64 | arrays indexed by the test type, and not worry about the order | |
638db43e | 65 | of EQ, NE, etc. */ |
03984308 | 66 | |
ffbc8796 BW |
67 | enum internal_test |
68 | { | |
69 | ITEST_EQ, | |
70 | ITEST_NE, | |
71 | ITEST_GT, | |
72 | ITEST_GE, | |
73 | ITEST_LT, | |
74 | ITEST_LE, | |
75 | ITEST_GTU, | |
76 | ITEST_GEU, | |
77 | ITEST_LTU, | |
78 | ITEST_LEU, | |
79 | ITEST_MAX | |
80 | }; | |
03984308 | 81 | |
03984308 BW |
82 | /* Array giving truth value on whether or not a given hard register |
83 | can support a given mode. */ | |
f939c3e6 RS |
84 | static char xtensa_hard_regno_mode_ok_p |
85 | [(int) MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER]; | |
03984308 | 86 | |
a46bbb5a | 87 | /* Largest block move to handle in-line. */ |
03984308 BW |
88 | #define LARGEST_MOVE_RATIO 15 |
89 | ||
90 | /* Define the structure for the machine field in struct function. */ | |
d1b38208 | 91 | struct GTY(()) machine_function |
03984308 BW |
92 | { |
93 | int accesses_prev_frame; | |
997b8b4d BW |
94 | bool need_a7_copy; |
95 | bool vararg_a7; | |
0d8442b8 | 96 | rtx vararg_a7_copy; |
240a513f | 97 | rtx_insn *set_frame_ptr_insn; |
ad89d820 MF |
98 | /* Current frame size calculated by compute_frame_size. */ |
99 | unsigned current_frame_size; | |
100 | /* Callee-save area size in the current frame calculated by | |
101 | compute_frame_size. */ | |
102 | int callee_save_size; | |
103 | bool frame_laid_out; | |
104 | bool epilogue_done; | |
06c2756e | 105 | bool inhibit_logues_a1_adjusts; |
03984308 BW |
106 | }; |
107 | ||
108 | /* Vector, indexed by hard register number, which contains 1 for a | |
109 | register that is allowable in a candidate for leaf function | |
638db43e | 110 | treatment. */ |
03984308 BW |
111 | |
112 | const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER] = | |
113 | { | |
114 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
115 | 1, 1, 1, | |
116 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
117 | 1 | |
118 | }; | |
119 | ||
c5387660 | 120 | static void xtensa_option_override (void); |
ffbc8796 | 121 | static enum internal_test map_test_to_internal_test (enum rtx_code); |
e1b193c1 | 122 | static rtx gen_int_relational (enum rtx_code, rtx, rtx); |
ffbc8796 | 123 | static rtx gen_float_relational (enum rtx_code, rtx, rtx); |
ef4bddc2 | 124 | static rtx gen_conditional_move (enum rtx_code, machine_mode, rtx, rtx); |
ffbc8796 | 125 | static rtx fixup_subreg_mem (rtx); |
ffbc8796 | 126 | static struct machine_function * xtensa_init_machine_status (void); |
6a7a462c | 127 | static rtx xtensa_legitimize_tls_address (rtx); |
ef4bddc2 | 128 | static rtx xtensa_legitimize_address (rtx, rtx, machine_mode); |
5bfed9a9 | 129 | static bool xtensa_mode_dependent_address_p (const_rtx, addr_space_t); |
586de218 | 130 | static bool xtensa_return_in_msb (const_tree); |
ffbc8796 | 131 | static void printx (FILE *, signed int); |
4c45af42 | 132 | static rtx xtensa_builtin_saveregs (void); |
ef4bddc2 | 133 | static bool xtensa_legitimate_address_p (machine_mode, rtx, bool); |
ffbc8796 BW |
134 | static unsigned int xtensa_multibss_section_type_flags (tree, const char *, |
135 | int) ATTRIBUTE_UNUSED; | |
ef4bddc2 | 136 | static section *xtensa_select_rtx_section (machine_mode, rtx, |
d6b5193b | 137 | unsigned HOST_WIDE_INT); |
e548c9df | 138 | static bool xtensa_rtx_costs (rtx, machine_mode, int, int, int *, bool); |
ccd02e73 | 139 | static int xtensa_insn_cost (rtx_insn *, bool); |
ef4bddc2 | 140 | static int xtensa_register_move_cost (machine_mode, reg_class_t, |
5378dda2 | 141 | reg_class_t); |
ef4bddc2 | 142 | static int xtensa_memory_move_cost (machine_mode, reg_class_t, bool); |
c35d187f | 143 | static tree xtensa_build_builtin_va_list (void); |
586de218 | 144 | static bool xtensa_return_in_memory (const_tree, const_tree); |
726a989a RB |
145 | static tree xtensa_gimplify_va_arg_expr (tree, tree, gimple_seq *, |
146 | gimple_seq *); | |
6930c98c RS |
147 | static void xtensa_function_arg_advance (cumulative_args_t, |
148 | const function_arg_info &); | |
6783fdb7 | 149 | static rtx xtensa_function_arg (cumulative_args_t, const function_arg_info &); |
d5cc9181 | 150 | static rtx xtensa_function_incoming_arg (cumulative_args_t, |
6783fdb7 | 151 | const function_arg_info &); |
e2b2d01e | 152 | static rtx xtensa_function_value (const_tree, const_tree, bool); |
ef4bddc2 | 153 | static rtx xtensa_libcall_value (machine_mode, const_rtx); |
dde8a3a4 | 154 | static bool xtensa_function_value_regno_p (const unsigned int); |
ef4bddc2 | 155 | static unsigned int xtensa_function_arg_boundary (machine_mode, |
c2ed6cf8 | 156 | const_tree); |
09fa8841 | 157 | static void xtensa_init_builtins (void); |
f311c3b4 | 158 | static tree xtensa_fold_builtin (tree, int, tree *, bool); |
ef4bddc2 | 159 | static rtx xtensa_expand_builtin (tree, rtx, rtx, machine_mode, int); |
9d0b1619 | 160 | static void xtensa_va_start (tree, rtx); |
b52b1749 | 161 | static bool xtensa_frame_pointer_required (void); |
2b4fa409 | 162 | static rtx xtensa_static_chain (const_tree, bool); |
3c1229cb RH |
163 | static void xtensa_asm_trampoline_template (FILE *); |
164 | static void xtensa_trampoline_init (rtx, tree, rtx); | |
2ac6bb04 | 165 | static bool xtensa_output_addr_const_extra (FILE *, rtx); |
ef4bddc2 | 166 | static bool xtensa_cannot_force_const_mem (machine_mode, rtx); |
b64a1b53 | 167 | |
a6e508f9 AS |
168 | static reg_class_t xtensa_preferred_reload_class (rtx, reg_class_t); |
169 | static reg_class_t xtensa_preferred_output_reload_class (rtx, reg_class_t); | |
170 | static reg_class_t xtensa_secondary_reload (bool, rtx, reg_class_t, | |
ef4bddc2 | 171 | machine_mode, |
a6e508f9 AS |
172 | struct secondary_reload_info *); |
173 | ||
a1a79768 | 174 | static bool constantpool_address_p (const_rtx addr); |
ef4bddc2 | 175 | static bool xtensa_legitimate_constant_p (machine_mode, rtx); |
6383386a FY |
176 | static void xtensa_reorg (void); |
177 | static bool xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
178 | unsigned int, bool); | |
179 | static const char *xtensa_invalid_within_doloop (const rtx_insn *); | |
a1a79768 | 180 | |
d9886a9e | 181 | static bool xtensa_member_type_forces_blk (const_tree, |
ef4bddc2 | 182 | machine_mode mode); |
d9886a9e | 183 | |
590e2636 | 184 | static void xtensa_conditional_register_usage (void); |
c43f4279 | 185 | static unsigned int xtensa_hard_regno_nregs (unsigned int, machine_mode); |
f939c3e6 | 186 | static bool xtensa_hard_regno_mode_ok (unsigned int, machine_mode); |
99e1629f | 187 | static bool xtensa_modes_tieable_p (machine_mode, machine_mode); |
58e17cf8 | 188 | static HOST_WIDE_INT xtensa_constant_alignment (const_tree, HOST_WIDE_INT); |
f50c32fa MF |
189 | static bool xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, |
190 | const int to); | |
2a31c321 | 191 | static HOST_WIDE_INT xtensa_starting_frame_offset (void); |
8c9ee176 | 192 | static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void); |
43b0c56f | 193 | static bool xtensa_function_ok_for_sibcall (tree, tree); |
936efcac | 194 | static bool xtensa_constant_ok_for_cprop_p (const_rtx); |
b7641550 MF |
195 | static rtx xtensa_delegitimize_address (rtx); |
196 | ||
590e2636 | 197 | \f |
03984308 BW |
198 | |
199 | /* These hooks specify assembly directives for creating certain kinds | |
200 | of integer object. */ | |
201 | ||
202 | #undef TARGET_ASM_ALIGNED_SI_OP | |
203 | #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t" | |
204 | ||
b64a1b53 RH |
205 | #undef TARGET_ASM_SELECT_RTX_SECTION |
206 | #define TARGET_ASM_SELECT_RTX_SECTION xtensa_select_rtx_section | |
03984308 | 207 | |
506d7b68 PB |
208 | #undef TARGET_LEGITIMIZE_ADDRESS |
209 | #define TARGET_LEGITIMIZE_ADDRESS xtensa_legitimize_address | |
a1a79768 AS |
210 | #undef TARGET_MODE_DEPENDENT_ADDRESS_P |
211 | #define TARGET_MODE_DEPENDENT_ADDRESS_P xtensa_mode_dependent_address_p | |
506d7b68 | 212 | |
5378dda2 AS |
213 | #undef TARGET_REGISTER_MOVE_COST |
214 | #define TARGET_REGISTER_MOVE_COST xtensa_register_move_cost | |
215 | #undef TARGET_MEMORY_MOVE_COST | |
216 | #define TARGET_MEMORY_MOVE_COST xtensa_memory_move_cost | |
3c50106f RH |
217 | #undef TARGET_RTX_COSTS |
218 | #define TARGET_RTX_COSTS xtensa_rtx_costs | |
ccd02e73 TJJS |
219 | #undef TARGET_INSN_COST |
220 | #define TARGET_INSN_COST xtensa_insn_cost | |
dcefdf67 | 221 | #undef TARGET_ADDRESS_COST |
b413068c | 222 | #define TARGET_ADDRESS_COST hook_int_rtx_mode_as_bool_0 |
3c50106f | 223 | |
d9886a9e L |
224 | #undef TARGET_MEMBER_TYPE_FORCES_BLK |
225 | #define TARGET_MEMBER_TYPE_FORCES_BLK xtensa_member_type_forces_blk | |
226 | ||
c35d187f RH |
227 | #undef TARGET_BUILD_BUILTIN_VA_LIST |
228 | #define TARGET_BUILD_BUILTIN_VA_LIST xtensa_build_builtin_va_list | |
229 | ||
d7bd8aeb JJ |
230 | #undef TARGET_EXPAND_BUILTIN_VA_START |
231 | #define TARGET_EXPAND_BUILTIN_VA_START xtensa_va_start | |
232 | ||
cde0f3fd PB |
233 | #undef TARGET_PROMOTE_FUNCTION_MODE |
234 | #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote | |
4c45af42 | 235 | #undef TARGET_PROMOTE_PROTOTYPES |
586de218 | 236 | #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true |
4c45af42 | 237 | |
4c45af42 KH |
238 | #undef TARGET_RETURN_IN_MEMORY |
239 | #define TARGET_RETURN_IN_MEMORY xtensa_return_in_memory | |
e2b2d01e AS |
240 | #undef TARGET_FUNCTION_VALUE |
241 | #define TARGET_FUNCTION_VALUE xtensa_function_value | |
dde8a3a4 AS |
242 | #undef TARGET_LIBCALL_VALUE |
243 | #define TARGET_LIBCALL_VALUE xtensa_libcall_value | |
244 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
245 | #define TARGET_FUNCTION_VALUE_REGNO_P xtensa_function_value_regno_p | |
246 | ||
42ba5130 | 247 | #undef TARGET_SPLIT_COMPLEX_ARG |
3101faab | 248 | #define TARGET_SPLIT_COMPLEX_ARG hook_bool_const_tree_true |
fe984136 RH |
249 | #undef TARGET_MUST_PASS_IN_STACK |
250 | #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size | |
626a4b31 NF |
251 | #undef TARGET_FUNCTION_ARG_ADVANCE |
252 | #define TARGET_FUNCTION_ARG_ADVANCE xtensa_function_arg_advance | |
253 | #undef TARGET_FUNCTION_ARG | |
254 | #define TARGET_FUNCTION_ARG xtensa_function_arg | |
255 | #undef TARGET_FUNCTION_INCOMING_ARG | |
256 | #define TARGET_FUNCTION_INCOMING_ARG xtensa_function_incoming_arg | |
c2ed6cf8 NF |
257 | #undef TARGET_FUNCTION_ARG_BOUNDARY |
258 | #define TARGET_FUNCTION_ARG_BOUNDARY xtensa_function_arg_boundary | |
4c45af42 KH |
259 | |
260 | #undef TARGET_EXPAND_BUILTIN_SAVEREGS | |
261 | #define TARGET_EXPAND_BUILTIN_SAVEREGS xtensa_builtin_saveregs | |
85d53c1d RH |
262 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
263 | #define TARGET_GIMPLIFY_VA_ARG_EXPR xtensa_gimplify_va_arg_expr | |
4c45af42 | 264 | |
6e5ff6e7 BW |
265 | #undef TARGET_RETURN_IN_MSB |
266 | #define TARGET_RETURN_IN_MSB xtensa_return_in_msb | |
267 | ||
09fa8841 BW |
268 | #undef TARGET_INIT_BUILTINS |
269 | #define TARGET_INIT_BUILTINS xtensa_init_builtins | |
270 | #undef TARGET_FOLD_BUILTIN | |
271 | #define TARGET_FOLD_BUILTIN xtensa_fold_builtin | |
272 | #undef TARGET_EXPAND_BUILTIN | |
273 | #define TARGET_EXPAND_BUILTIN xtensa_expand_builtin | |
274 | ||
a6e508f9 AS |
275 | #undef TARGET_PREFERRED_RELOAD_CLASS |
276 | #define TARGET_PREFERRED_RELOAD_CLASS xtensa_preferred_reload_class | |
277 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
278 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS xtensa_preferred_output_reload_class | |
279 | ||
37fbe8a3 BW |
280 | #undef TARGET_SECONDARY_RELOAD |
281 | #define TARGET_SECONDARY_RELOAD xtensa_secondary_reload | |
282 | ||
6a7a462c | 283 | #undef TARGET_HAVE_TLS |
e46dad5d | 284 | #define TARGET_HAVE_TLS HAVE_AS_TLS |
6a7a462c BW |
285 | |
286 | #undef TARGET_CANNOT_FORCE_CONST_MEM | |
fbbf66e7 | 287 | #define TARGET_CANNOT_FORCE_CONST_MEM xtensa_cannot_force_const_mem |
6a7a462c | 288 | |
d81db636 SB |
289 | #undef TARGET_LRA_P |
290 | #define TARGET_LRA_P hook_bool_void_false | |
291 | ||
c6c3dba9 PB |
292 | #undef TARGET_LEGITIMATE_ADDRESS_P |
293 | #define TARGET_LEGITIMATE_ADDRESS_P xtensa_legitimate_address_p | |
294 | ||
b52b1749 AS |
295 | #undef TARGET_FRAME_POINTER_REQUIRED |
296 | #define TARGET_FRAME_POINTER_REQUIRED xtensa_frame_pointer_required | |
297 | ||
2b4fa409 RH |
298 | #undef TARGET_STATIC_CHAIN |
299 | #define TARGET_STATIC_CHAIN xtensa_static_chain | |
3c1229cb RH |
300 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
301 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE xtensa_asm_trampoline_template | |
302 | #undef TARGET_TRAMPOLINE_INIT | |
303 | #define TARGET_TRAMPOLINE_INIT xtensa_trampoline_init | |
304 | ||
c5387660 JM |
305 | #undef TARGET_OPTION_OVERRIDE |
306 | #define TARGET_OPTION_OVERRIDE xtensa_option_override | |
307 | ||
2ac6bb04 AS |
308 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
309 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA xtensa_output_addr_const_extra | |
310 | ||
1a627b35 RS |
311 | #undef TARGET_LEGITIMATE_CONSTANT_P |
312 | #define TARGET_LEGITIMATE_CONSTANT_P xtensa_legitimate_constant_p | |
313 | ||
6383386a FY |
314 | #undef TARGET_MACHINE_DEPENDENT_REORG |
315 | #define TARGET_MACHINE_DEPENDENT_REORG xtensa_reorg | |
316 | ||
317 | #undef TARGET_CAN_USE_DOLOOP_P | |
318 | #define TARGET_CAN_USE_DOLOOP_P xtensa_can_use_doloop_p | |
319 | ||
320 | #undef TARGET_INVALID_WITHIN_DOLOOP | |
321 | #define TARGET_INVALID_WITHIN_DOLOOP xtensa_invalid_within_doloop | |
322 | ||
590e2636 MF |
323 | #undef TARGET_CONDITIONAL_REGISTER_USAGE |
324 | #define TARGET_CONDITIONAL_REGISTER_USAGE xtensa_conditional_register_usage | |
325 | ||
c43f4279 RS |
326 | #undef TARGET_HARD_REGNO_NREGS |
327 | #define TARGET_HARD_REGNO_NREGS xtensa_hard_regno_nregs | |
f939c3e6 RS |
328 | #undef TARGET_HARD_REGNO_MODE_OK |
329 | #define TARGET_HARD_REGNO_MODE_OK xtensa_hard_regno_mode_ok | |
330 | ||
99e1629f RS |
331 | #undef TARGET_MODES_TIEABLE_P |
332 | #define TARGET_MODES_TIEABLE_P xtensa_modes_tieable_p | |
333 | ||
58e17cf8 RS |
334 | #undef TARGET_CONSTANT_ALIGNMENT |
335 | #define TARGET_CONSTANT_ALIGNMENT xtensa_constant_alignment | |
336 | ||
f50c32fa MF |
337 | #undef TARGET_CAN_ELIMINATE |
338 | #define TARGET_CAN_ELIMINATE xtensa_can_eliminate | |
339 | ||
2a31c321 RS |
340 | #undef TARGET_STARTING_FRAME_OFFSET |
341 | #define TARGET_STARTING_FRAME_OFFSET xtensa_starting_frame_offset | |
342 | ||
8c9ee176 MF |
343 | #undef TARGET_ASAN_SHADOW_OFFSET |
344 | #define TARGET_ASAN_SHADOW_OFFSET xtensa_asan_shadow_offset | |
345 | ||
c6579387 MF |
346 | #undef TARGET_HAVE_SPECULATION_SAFE_VALUE |
347 | #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed | |
348 | ||
43b0c56f TJJS |
349 | #undef TARGET_FUNCTION_OK_FOR_SIBCALL |
350 | #define TARGET_FUNCTION_OK_FOR_SIBCALL xtensa_function_ok_for_sibcall | |
351 | ||
936efcac TJJS |
352 | #undef TARGET_CONSTANT_OK_FOR_CPROP_P |
353 | #define TARGET_CONSTANT_OK_FOR_CPROP_P xtensa_constant_ok_for_cprop_p | |
354 | ||
355 | #undef TARGET_DELEGITIMIZE_ADDRESS | |
356 | #define TARGET_DELEGITIMIZE_ADDRESS xtensa_delegitimize_address | |
357 | ||
b64a1b53 | 358 | struct gcc_target targetm = TARGET_INITIALIZER; |
03984308 | 359 | |
887af464 BW |
360 | \f |
361 | /* Functions to test Xtensa immediate operand validity. */ | |
03984308 | 362 | |
8eb1bc5c BW |
363 | bool |
364 | xtensa_simm8 (HOST_WIDE_INT v) | |
365 | { | |
9b251fe2 | 366 | return IN_RANGE (v, -128, 127); |
8eb1bc5c BW |
367 | } |
368 | ||
369 | ||
370 | bool | |
371 | xtensa_simm8x256 (HOST_WIDE_INT v) | |
372 | { | |
9b251fe2 | 373 | return (v & 255) == 0 && IN_RANGE (v, -32768, 32512); |
8eb1bc5c BW |
374 | } |
375 | ||
376 | ||
377 | bool | |
378 | xtensa_simm12b (HOST_WIDE_INT v) | |
379 | { | |
9b251fe2 | 380 | return IN_RANGE (v, -2048, 2047); |
8eb1bc5c BW |
381 | } |
382 | ||
383 | ||
384 | static bool | |
385 | xtensa_uimm8 (HOST_WIDE_INT v) | |
386 | { | |
9b251fe2 | 387 | return IN_RANGE (v, 0, 255); |
8eb1bc5c BW |
388 | } |
389 | ||
390 | ||
391 | static bool | |
392 | xtensa_uimm8x2 (HOST_WIDE_INT v) | |
393 | { | |
9b251fe2 | 394 | return (v & 1) == 0 && IN_RANGE (v, 0, 510); |
8eb1bc5c BW |
395 | } |
396 | ||
397 | ||
398 | static bool | |
399 | xtensa_uimm8x4 (HOST_WIDE_INT v) | |
400 | { | |
9b251fe2 | 401 | return (v & 3) == 0 && IN_RANGE (v, 0, 1020); |
8eb1bc5c BW |
402 | } |
403 | ||
404 | ||
405 | static bool | |
406 | xtensa_b4const (HOST_WIDE_INT v) | |
03984308 BW |
407 | { |
408 | switch (v) | |
409 | { | |
8eb1bc5c BW |
410 | case -1: |
411 | case 1: | |
03984308 BW |
412 | case 2: |
413 | case 3: | |
414 | case 4: | |
415 | case 5: | |
416 | case 6: | |
417 | case 7: | |
418 | case 8: | |
419 | case 10: | |
420 | case 12: | |
421 | case 16: | |
422 | case 32: | |
423 | case 64: | |
424 | case 128: | |
425 | case 256: | |
8eb1bc5c | 426 | return true; |
03984308 | 427 | } |
8eb1bc5c | 428 | return false; |
03984308 BW |
429 | } |
430 | ||
03984308 | 431 | |
8eb1bc5c BW |
432 | bool |
433 | xtensa_b4const_or_zero (HOST_WIDE_INT v) | |
03984308 | 434 | { |
8eb1bc5c BW |
435 | if (v == 0) |
436 | return true; | |
437 | return xtensa_b4const (v); | |
03984308 BW |
438 | } |
439 | ||
03984308 | 440 | |
8eb1bc5c BW |
441 | bool |
442 | xtensa_b4constu (HOST_WIDE_INT v) | |
03984308 BW |
443 | { |
444 | switch (v) | |
445 | { | |
8eb1bc5c BW |
446 | case 32768: |
447 | case 65536: | |
03984308 BW |
448 | case 2: |
449 | case 3: | |
450 | case 4: | |
451 | case 5: | |
452 | case 6: | |
453 | case 7: | |
454 | case 8: | |
455 | case 10: | |
456 | case 12: | |
457 | case 16: | |
458 | case 32: | |
459 | case 64: | |
460 | case 128: | |
461 | case 256: | |
8eb1bc5c | 462 | return true; |
03984308 | 463 | } |
8eb1bc5c | 464 | return false; |
03984308 BW |
465 | } |
466 | ||
03984308 | 467 | |
8eb1bc5c BW |
468 | bool |
469 | xtensa_mask_immediate (HOST_WIDE_INT v) | |
03984308 | 470 | { |
b753405a | 471 | return IN_RANGE (exact_log2 (v + 1), 1, 16); |
03984308 BW |
472 | } |
473 | ||
03984308 | 474 | |
03984308 | 475 | /* This is just like the standard true_regnum() function except that it |
638db43e | 476 | works even when reg_renumber is not initialized. */ |
03984308 BW |
477 | |
478 | int | |
ffbc8796 | 479 | xt_true_regnum (rtx x) |
03984308 BW |
480 | { |
481 | if (GET_CODE (x) == REG) | |
482 | { | |
483 | if (reg_renumber | |
484 | && REGNO (x) >= FIRST_PSEUDO_REGISTER | |
485 | && reg_renumber[REGNO (x)] >= 0) | |
486 | return reg_renumber[REGNO (x)]; | |
487 | return REGNO (x); | |
488 | } | |
489 | if (GET_CODE (x) == SUBREG) | |
490 | { | |
491 | int base = xt_true_regnum (SUBREG_REG (x)); | |
492 | if (base >= 0 && base < FIRST_PSEUDO_REGISTER) | |
493 | return base + subreg_regno_offset (REGNO (SUBREG_REG (x)), | |
494 | GET_MODE (SUBREG_REG (x)), | |
495 | SUBREG_BYTE (x), GET_MODE (x)); | |
496 | } | |
497 | return -1; | |
498 | } | |
499 | ||
500 | ||
03984308 | 501 | int |
ef4bddc2 | 502 | xtensa_valid_move (machine_mode mode, rtx *operands) |
03984308 | 503 | { |
a8cacfd2 BW |
504 | /* Either the destination or source must be a register, and the |
505 | MAC16 accumulator doesn't count. */ | |
506 | ||
507 | if (register_operand (operands[0], mode)) | |
508 | { | |
509 | int dst_regnum = xt_true_regnum (operands[0]); | |
510 | ||
a024f514 MF |
511 | if (xtensa_tls_referenced_p (operands[1])) |
512 | return FALSE; | |
513 | ||
638db43e | 514 | /* The stack pointer can only be assigned with a MOVSP opcode. */ |
a8cacfd2 | 515 | if (dst_regnum == STACK_POINTER_REGNUM) |
590e2636 MF |
516 | return !TARGET_WINDOWED_ABI |
517 | || (mode == SImode | |
518 | && register_operand (operands[1], mode) | |
519 | && !ACC_REG_P (xt_true_regnum (operands[1]))); | |
a8cacfd2 BW |
520 | |
521 | if (!ACC_REG_P (dst_regnum)) | |
522 | return true; | |
523 | } | |
3437320b | 524 | if (register_operand (operands[1], mode)) |
a8cacfd2 BW |
525 | { |
526 | int src_regnum = xt_true_regnum (operands[1]); | |
527 | if (!ACC_REG_P (src_regnum)) | |
528 | return true; | |
529 | } | |
03984308 BW |
530 | return FALSE; |
531 | } | |
532 | ||
533 | ||
03984308 | 534 | int |
ffbc8796 | 535 | smalloffset_mem_p (rtx op) |
03984308 BW |
536 | { |
537 | if (GET_CODE (op) == MEM) | |
538 | { | |
539 | rtx addr = XEXP (op, 0); | |
540 | if (GET_CODE (addr) == REG) | |
da1f39e4 | 541 | return BASE_REG_P (addr, 0); |
03984308 BW |
542 | if (GET_CODE (addr) == PLUS) |
543 | { | |
544 | rtx offset = XEXP (addr, 0); | |
8eb1bc5c | 545 | HOST_WIDE_INT val; |
03984308 BW |
546 | if (GET_CODE (offset) != CONST_INT) |
547 | offset = XEXP (addr, 1); | |
548 | if (GET_CODE (offset) != CONST_INT) | |
549 | return FALSE; | |
8eb1bc5c BW |
550 | |
551 | val = INTVAL (offset); | |
9b251fe2 | 552 | return (val & 3) == 0 && IN_RANGE (val, 0, 60); |
03984308 BW |
553 | } |
554 | } | |
555 | return FALSE; | |
556 | } | |
557 | ||
558 | ||
a1a79768 AS |
559 | static bool |
560 | constantpool_address_p (const_rtx addr) | |
03984308 | 561 | { |
a1a79768 | 562 | const_rtx sym = addr; |
03984308 BW |
563 | |
564 | if (GET_CODE (addr) == CONST) | |
565 | { | |
566 | rtx offset; | |
567 | ||
3bbc2af6 | 568 | /* Only handle (PLUS (SYM, OFFSET)) form. */ |
03984308 BW |
569 | addr = XEXP (addr, 0); |
570 | if (GET_CODE (addr) != PLUS) | |
a1a79768 | 571 | return false; |
03984308 | 572 | |
3bbc2af6 | 573 | /* Make sure the address is word aligned. */ |
03984308 | 574 | offset = XEXP (addr, 1); |
a1a79768 | 575 | if ((!CONST_INT_P (offset)) |
03984308 | 576 | || ((INTVAL (offset) & 3) != 0)) |
a1a79768 | 577 | return false; |
03984308 BW |
578 | |
579 | sym = XEXP (addr, 0); | |
580 | } | |
581 | ||
582 | if ((GET_CODE (sym) == SYMBOL_REF) | |
583 | && CONSTANT_POOL_ADDRESS_P (sym)) | |
a1a79768 AS |
584 | return true; |
585 | return false; | |
03984308 BW |
586 | } |
587 | ||
588 | ||
589 | int | |
ffbc8796 | 590 | constantpool_mem_p (rtx op) |
03984308 | 591 | { |
63694bdd BW |
592 | if (GET_CODE (op) == SUBREG) |
593 | op = SUBREG_REG (op); | |
03984308 BW |
594 | if (GET_CODE (op) == MEM) |
595 | return constantpool_address_p (XEXP (op, 0)); | |
596 | return FALSE; | |
597 | } | |
598 | ||
599 | ||
6a7a462c BW |
600 | /* Return TRUE if X is a thread-local symbol. */ |
601 | ||
602 | static bool | |
603 | xtensa_tls_symbol_p (rtx x) | |
604 | { | |
e46dad5d | 605 | if (! targetm.have_tls) |
6a7a462c BW |
606 | return false; |
607 | ||
608 | return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0; | |
609 | } | |
610 | ||
611 | ||
03984308 | 612 | void |
ffbc8796 | 613 | xtensa_extend_reg (rtx dst, rtx src) |
03984308 BW |
614 | { |
615 | rtx temp = gen_reg_rtx (SImode); | |
616 | rtx shift = GEN_INT (BITS_PER_WORD - GET_MODE_BITSIZE (GET_MODE (src))); | |
617 | ||
3bbc2af6 | 618 | /* Generate paradoxical subregs as needed so that the modes match. */ |
03984308 BW |
619 | src = simplify_gen_subreg (SImode, src, GET_MODE (src), 0); |
620 | dst = simplify_gen_subreg (SImode, dst, GET_MODE (dst), 0); | |
621 | ||
622 | emit_insn (gen_ashlsi3 (temp, src, shift)); | |
623 | emit_insn (gen_ashrsi3 (dst, temp, shift)); | |
624 | } | |
625 | ||
626 | ||
8eb1bc5c | 627 | bool |
ef4bddc2 | 628 | xtensa_mem_offset (unsigned v, machine_mode mode) |
03984308 BW |
629 | { |
630 | switch (mode) | |
631 | { | |
4e10a5a7 | 632 | case E_BLKmode: |
03984308 BW |
633 | /* Handle the worst case for block moves. See xtensa_expand_block_move |
634 | where we emit an optimized block move operation if the block can be | |
635 | moved in < "move_ratio" pieces. The worst case is when the block is | |
636 | aligned but has a size of (3 mod 4) (does this happen?) so that the | |
638db43e | 637 | last piece requires a byte load/store. */ |
f42f5a1b BW |
638 | return (xtensa_uimm8 (v) |
639 | && xtensa_uimm8 (v + MOVE_MAX * LARGEST_MOVE_RATIO)); | |
03984308 | 640 | |
4e10a5a7 | 641 | case E_QImode: |
03984308 BW |
642 | return xtensa_uimm8 (v); |
643 | ||
4e10a5a7 | 644 | case E_HImode: |
03984308 BW |
645 | return xtensa_uimm8x2 (v); |
646 | ||
738ae6ee | 647 | case E_DImode: |
4e10a5a7 | 648 | case E_DFmode: |
03984308 BW |
649 | return (xtensa_uimm8x4 (v) && xtensa_uimm8x4 (v + 4)); |
650 | ||
651 | default: | |
652 | break; | |
653 | } | |
654 | ||
655 | return xtensa_uimm8x4 (v); | |
656 | } | |
657 | ||
658 | ||
ffbc8796 | 659 | /* Make normal rtx_code into something we can index from an array. */ |
03984308 BW |
660 | |
661 | static enum internal_test | |
ffbc8796 | 662 | map_test_to_internal_test (enum rtx_code test_code) |
03984308 BW |
663 | { |
664 | enum internal_test test = ITEST_MAX; | |
665 | ||
666 | switch (test_code) | |
667 | { | |
668 | default: break; | |
669 | case EQ: test = ITEST_EQ; break; | |
670 | case NE: test = ITEST_NE; break; | |
671 | case GT: test = ITEST_GT; break; | |
672 | case GE: test = ITEST_GE; break; | |
673 | case LT: test = ITEST_LT; break; | |
674 | case LE: test = ITEST_LE; break; | |
675 | case GTU: test = ITEST_GTU; break; | |
676 | case GEU: test = ITEST_GEU; break; | |
677 | case LTU: test = ITEST_LTU; break; | |
678 | case LEU: test = ITEST_LEU; break; | |
679 | } | |
680 | ||
681 | return test; | |
682 | } | |
683 | ||
684 | ||
685 | /* Generate the code to compare two integer values. The return value is | |
638db43e | 686 | the comparison expression. */ |
03984308 BW |
687 | |
688 | static rtx | |
ffbc8796 BW |
689 | gen_int_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
690 | rtx cmp0, /* first operand to compare */ | |
e1b193c1 | 691 | rtx cmp1 /* second operand to compare */) |
03984308 | 692 | { |
ffbc8796 BW |
693 | struct cmp_info |
694 | { | |
03984308 | 695 | enum rtx_code test_code; /* test code to use in insn */ |
8eb1bc5c | 696 | bool (*const_range_p) (HOST_WIDE_INT); /* range check function */ |
03984308 BW |
697 | int const_add; /* constant to add (convert LE -> LT) */ |
698 | int reverse_regs; /* reverse registers in test */ | |
699 | int invert_const; /* != 0 if invert value if cmp1 is constant */ | |
700 | int invert_reg; /* != 0 if invert value if cmp1 is register */ | |
701 | int unsignedp; /* != 0 for unsigned comparisons. */ | |
702 | }; | |
703 | ||
704 | static struct cmp_info info[ (int)ITEST_MAX ] = { | |
705 | ||
8eb1bc5c BW |
706 | { EQ, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* EQ */ |
707 | { NE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* NE */ | |
03984308 | 708 | |
8eb1bc5c BW |
709 | { LT, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* GT */ |
710 | { GE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* GE */ | |
711 | { LT, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* LT */ | |
712 | { GE, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* LE */ | |
03984308 BW |
713 | |
714 | { LTU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* GTU */ | |
715 | { GEU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* GEU */ | |
716 | { LTU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* LTU */ | |
717 | { GEU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* LEU */ | |
718 | }; | |
719 | ||
720 | enum internal_test test; | |
ef4bddc2 | 721 | machine_mode mode; |
03984308 | 722 | struct cmp_info *p_info; |
e1b193c1 | 723 | int invert; |
03984308 BW |
724 | |
725 | test = map_test_to_internal_test (test_code); | |
177b6be0 | 726 | gcc_assert (test != ITEST_MAX); |
03984308 BW |
727 | |
728 | p_info = &info[ (int)test ]; | |
729 | ||
730 | mode = GET_MODE (cmp0); | |
731 | if (mode == VOIDmode) | |
732 | mode = GET_MODE (cmp1); | |
733 | ||
734 | /* Make sure we can handle any constants given to us. */ | |
735 | if (GET_CODE (cmp1) == CONST_INT) | |
736 | { | |
737 | HOST_WIDE_INT value = INTVAL (cmp1); | |
738 | unsigned HOST_WIDE_INT uvalue = (unsigned HOST_WIDE_INT)value; | |
739 | ||
740 | /* if the immediate overflows or does not fit in the immediate field, | |
741 | spill it to a register */ | |
742 | ||
743 | if ((p_info->unsignedp ? | |
744 | (uvalue + p_info->const_add > uvalue) : | |
745 | (value + p_info->const_add > value)) != (p_info->const_add > 0)) | |
746 | { | |
747 | cmp1 = force_reg (mode, cmp1); | |
748 | } | |
749 | else if (!(p_info->const_range_p) (value + p_info->const_add)) | |
750 | { | |
751 | cmp1 = force_reg (mode, cmp1); | |
752 | } | |
753 | } | |
754 | else if ((GET_CODE (cmp1) != REG) && (GET_CODE (cmp1) != SUBREG)) | |
755 | { | |
756 | cmp1 = force_reg (mode, cmp1); | |
757 | } | |
758 | ||
759 | /* See if we need to invert the result. */ | |
75ab2f0e | 760 | invert = (CONST_INT_P (cmp1) |
e1b193c1 TJJS |
761 | ? p_info->invert_const |
762 | : p_info->invert_reg); | |
03984308 BW |
763 | |
764 | /* Comparison to constants, may involve adding 1 to change a LT into LE. | |
765 | Comparison between two registers, may involve switching operands. */ | |
766 | if (GET_CODE (cmp1) == CONST_INT) | |
767 | { | |
768 | if (p_info->const_add != 0) | |
769 | cmp1 = GEN_INT (INTVAL (cmp1) + p_info->const_add); | |
770 | ||
771 | } | |
772 | else if (p_info->reverse_regs) | |
773 | { | |
774 | rtx temp = cmp0; | |
775 | cmp0 = cmp1; | |
776 | cmp1 = temp; | |
777 | } | |
778 | ||
e1b193c1 TJJS |
779 | return gen_rtx_fmt_ee (invert ? reverse_condition (p_info->test_code) |
780 | : p_info->test_code, | |
781 | VOIDmode, cmp0, cmp1); | |
03984308 BW |
782 | } |
783 | ||
784 | ||
785 | /* Generate the code to compare two float values. The return value is | |
638db43e | 786 | the comparison expression. */ |
03984308 BW |
787 | |
788 | static rtx | |
ffbc8796 BW |
789 | gen_float_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
790 | rtx cmp0, /* first operand to compare */ | |
791 | rtx cmp1 /* second operand to compare */) | |
03984308 | 792 | { |
ffbc8796 | 793 | rtx (*gen_fn) (rtx, rtx, rtx); |
03984308 BW |
794 | rtx brtmp; |
795 | int reverse_regs, invert; | |
796 | ||
797 | switch (test_code) | |
798 | { | |
799 | case EQ: reverse_regs = 0; invert = 0; gen_fn = gen_seq_sf; break; | |
800 | case NE: reverse_regs = 0; invert = 1; gen_fn = gen_seq_sf; break; | |
801 | case LE: reverse_regs = 0; invert = 0; gen_fn = gen_sle_sf; break; | |
802 | case GT: reverse_regs = 1; invert = 0; gen_fn = gen_slt_sf; break; | |
803 | case LT: reverse_regs = 0; invert = 0; gen_fn = gen_slt_sf; break; | |
804 | case GE: reverse_regs = 1; invert = 0; gen_fn = gen_sle_sf; break; | |
ff779f98 BW |
805 | case UNEQ: reverse_regs = 0; invert = 0; gen_fn = gen_suneq_sf; break; |
806 | case LTGT: reverse_regs = 0; invert = 1; gen_fn = gen_suneq_sf; break; | |
807 | case UNLE: reverse_regs = 0; invert = 0; gen_fn = gen_sunle_sf; break; | |
808 | case UNGT: reverse_regs = 1; invert = 0; gen_fn = gen_sunlt_sf; break; | |
809 | case UNLT: reverse_regs = 0; invert = 0; gen_fn = gen_sunlt_sf; break; | |
810 | case UNGE: reverse_regs = 1; invert = 0; gen_fn = gen_sunle_sf; break; | |
811 | case UNORDERED: | |
812 | reverse_regs = 0; invert = 0; gen_fn = gen_sunordered_sf; break; | |
813 | case ORDERED: | |
814 | reverse_regs = 0; invert = 1; gen_fn = gen_sunordered_sf; break; | |
633e4eb4 | 815 | default: |
1c563bed | 816 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 BW |
817 | reverse_regs = 0; invert = 0; gen_fn = 0; /* avoid compiler warnings */ |
818 | } | |
819 | ||
820 | if (reverse_regs) | |
821 | { | |
822 | rtx temp = cmp0; | |
823 | cmp0 = cmp1; | |
824 | cmp1 = temp; | |
825 | } | |
826 | ||
827 | brtmp = gen_rtx_REG (CCmode, FPCC_REGNUM); | |
828 | emit_insn (gen_fn (brtmp, cmp0, cmp1)); | |
829 | ||
1c563bed | 830 | return gen_rtx_fmt_ee (invert ? EQ : NE, VOIDmode, brtmp, const0_rtx); |
03984308 BW |
831 | } |
832 | ||
833 | ||
834 | void | |
ef4bddc2 | 835 | xtensa_expand_conditional_branch (rtx *operands, machine_mode mode) |
03984308 | 836 | { |
f90b7a5a PB |
837 | enum rtx_code test_code = GET_CODE (operands[0]); |
838 | rtx cmp0 = operands[1]; | |
839 | rtx cmp1 = operands[2]; | |
e1b193c1 | 840 | rtx cmp, label; |
03984308 | 841 | |
f90b7a5a | 842 | switch (mode) |
03984308 | 843 | { |
e1b193c1 TJJS |
844 | case E_SFmode: |
845 | if (TARGET_HARD_FLOAT) | |
846 | { | |
847 | cmp = gen_float_relational (test_code, cmp0, cmp1); | |
848 | break; | |
849 | } | |
850 | /* FALLTHRU */ | |
851 | ||
4e10a5a7 | 852 | case E_DFmode: |
03984308 | 853 | default: |
1c563bed | 854 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 | 855 | |
4e10a5a7 | 856 | case E_SImode: |
e1b193c1 | 857 | cmp = gen_int_relational (test_code, cmp0, cmp1); |
03984308 BW |
858 | break; |
859 | } | |
860 | ||
861 | /* Generate the branch. */ | |
e1b193c1 | 862 | label = gen_rtx_LABEL_REF (VOIDmode, operands[3]); |
f7df4a84 | 863 | emit_jump_insn (gen_rtx_SET (pc_rtx, |
03984308 | 864 | gen_rtx_IF_THEN_ELSE (VOIDmode, cmp, |
e1b193c1 TJJS |
865 | label, |
866 | pc_rtx))); | |
03984308 BW |
867 | } |
868 | ||
869 | ||
870 | static rtx | |
ef4bddc2 | 871 | gen_conditional_move (enum rtx_code code, machine_mode mode, |
f90b7a5a | 872 | rtx op0, rtx op1) |
03984308 | 873 | { |
f90b7a5a | 874 | if (mode == SImode) |
03984308 | 875 | { |
f90b7a5a PB |
876 | rtx cmp; |
877 | ||
03984308 BW |
878 | /* Jump optimization calls get_condition() which canonicalizes |
879 | comparisons like (GE x <const>) to (GT x <const-1>). | |
880 | Transform those comparisons back to GE, since that is the | |
881 | comparison supported in Xtensa. We shouldn't have to | |
882 | transform <LE x const> comparisons, because neither | |
883 | xtensa_expand_conditional_branch() nor get_condition() will | |
638db43e | 884 | produce them. */ |
03984308 BW |
885 | |
886 | if ((code == GT) && (op1 == constm1_rtx)) | |
887 | { | |
888 | code = GE; | |
889 | op1 = const0_rtx; | |
890 | } | |
bd1cd0d0 | 891 | cmp = gen_rtx_fmt_ee (code, VOIDmode, pc_rtx, const0_rtx); |
03984308 BW |
892 | |
893 | if (boolean_operator (cmp, VOIDmode)) | |
894 | { | |
3bbc2af6 | 895 | /* Swap the operands to make const0 second. */ |
03984308 BW |
896 | if (op0 == const0_rtx) |
897 | { | |
898 | op0 = op1; | |
899 | op1 = const0_rtx; | |
900 | } | |
901 | ||
3bbc2af6 | 902 | /* If not comparing against zero, emit a comparison (subtract). */ |
03984308 BW |
903 | if (op1 != const0_rtx) |
904 | { | |
905 | op0 = expand_binop (SImode, sub_optab, op0, op1, | |
906 | 0, 0, OPTAB_LIB_WIDEN); | |
907 | op1 = const0_rtx; | |
908 | } | |
909 | } | |
910 | else if (branch_operator (cmp, VOIDmode)) | |
911 | { | |
3bbc2af6 | 912 | /* Swap the operands to make const0 second. */ |
03984308 BW |
913 | if (op0 == const0_rtx) |
914 | { | |
915 | op0 = op1; | |
916 | op1 = const0_rtx; | |
917 | ||
918 | switch (code) | |
919 | { | |
920 | case LT: code = GE; break; | |
921 | case GE: code = LT; break; | |
177b6be0 | 922 | default: gcc_unreachable (); |
03984308 BW |
923 | } |
924 | } | |
925 | ||
926 | if (op1 != const0_rtx) | |
927 | return 0; | |
928 | } | |
929 | else | |
930 | return 0; | |
931 | ||
1c563bed | 932 | return gen_rtx_fmt_ee (code, VOIDmode, op0, op1); |
03984308 BW |
933 | } |
934 | ||
f90b7a5a | 935 | if (TARGET_HARD_FLOAT && mode == SFmode) |
03984308 BW |
936 | return gen_float_relational (code, op0, op1); |
937 | ||
938 | return 0; | |
939 | } | |
940 | ||
941 | ||
942 | int | |
ffbc8796 | 943 | xtensa_expand_conditional_move (rtx *operands, int isflt) |
03984308 | 944 | { |
f90b7a5a PB |
945 | rtx dest = operands[0]; |
946 | rtx cmp = operands[1]; | |
ef4bddc2 | 947 | machine_mode cmp_mode = GET_MODE (XEXP (cmp, 0)); |
ffbc8796 | 948 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 949 | |
f90b7a5a PB |
950 | if (!(cmp = gen_conditional_move (GET_CODE (cmp), cmp_mode, |
951 | XEXP (cmp, 0), XEXP (cmp, 1)))) | |
03984308 BW |
952 | return 0; |
953 | ||
954 | if (isflt) | |
f90b7a5a | 955 | gen_fn = (cmp_mode == SImode |
03984308 BW |
956 | ? gen_movsfcc_internal0 |
957 | : gen_movsfcc_internal1); | |
958 | else | |
f90b7a5a | 959 | gen_fn = (cmp_mode == SImode |
03984308 BW |
960 | ? gen_movsicc_internal0 |
961 | : gen_movsicc_internal1); | |
962 | ||
f90b7a5a | 963 | emit_insn (gen_fn (dest, XEXP (cmp, 0), operands[2], operands[3], cmp)); |
03984308 BW |
964 | return 1; |
965 | } | |
966 | ||
967 | ||
968 | int | |
ef4bddc2 | 969 | xtensa_expand_scc (rtx operands[4], machine_mode cmp_mode) |
03984308 BW |
970 | { |
971 | rtx dest = operands[0]; | |
f90b7a5a | 972 | rtx cmp; |
03984308 | 973 | rtx one_tmp, zero_tmp; |
ffbc8796 | 974 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 975 | |
f90b7a5a PB |
976 | if (!(cmp = gen_conditional_move (GET_CODE (operands[1]), cmp_mode, |
977 | operands[2], operands[3]))) | |
03984308 BW |
978 | return 0; |
979 | ||
980 | one_tmp = gen_reg_rtx (SImode); | |
981 | zero_tmp = gen_reg_rtx (SImode); | |
982 | emit_insn (gen_movsi (one_tmp, const_true_rtx)); | |
983 | emit_insn (gen_movsi (zero_tmp, const0_rtx)); | |
984 | ||
f90b7a5a | 985 | gen_fn = (cmp_mode == SImode |
03984308 BW |
986 | ? gen_movsicc_internal0 |
987 | : gen_movsicc_internal1); | |
988 | emit_insn (gen_fn (dest, XEXP (cmp, 0), one_tmp, zero_tmp, cmp)); | |
989 | return 1; | |
990 | } | |
991 | ||
992 | ||
633e4eb4 BW |
993 | /* Split OP[1] into OP[2,3] and likewise for OP[0] into OP[0,1]. MODE is |
994 | for the output, i.e., the input operands are twice as big as MODE. */ | |
995 | ||
996 | void | |
ef4bddc2 | 997 | xtensa_split_operand_pair (rtx operands[4], machine_mode mode) |
633e4eb4 BW |
998 | { |
999 | switch (GET_CODE (operands[1])) | |
1000 | { | |
1001 | case REG: | |
1002 | operands[3] = gen_rtx_REG (mode, REGNO (operands[1]) + 1); | |
1003 | operands[2] = gen_rtx_REG (mode, REGNO (operands[1])); | |
1004 | break; | |
1005 | ||
1006 | case MEM: | |
1007 | operands[3] = adjust_address (operands[1], mode, GET_MODE_SIZE (mode)); | |
1008 | operands[2] = adjust_address (operands[1], mode, 0); | |
1009 | break; | |
1010 | ||
1011 | case CONST_INT: | |
1012 | case CONST_DOUBLE: | |
1013 | split_double (operands[1], &operands[2], &operands[3]); | |
1014 | break; | |
1015 | ||
1016 | default: | |
177b6be0 | 1017 | gcc_unreachable (); |
633e4eb4 BW |
1018 | } |
1019 | ||
1020 | switch (GET_CODE (operands[0])) | |
1021 | { | |
1022 | case REG: | |
1023 | operands[1] = gen_rtx_REG (mode, REGNO (operands[0]) + 1); | |
1024 | operands[0] = gen_rtx_REG (mode, REGNO (operands[0])); | |
1025 | break; | |
1026 | ||
1027 | case MEM: | |
1028 | operands[1] = adjust_address (operands[0], mode, GET_MODE_SIZE (mode)); | |
1029 | operands[0] = adjust_address (operands[0], mode, 0); | |
1030 | break; | |
1031 | ||
1032 | default: | |
177b6be0 | 1033 | gcc_unreachable (); |
633e4eb4 BW |
1034 | } |
1035 | } | |
1036 | ||
1037 | ||
cd02f15f TJJS |
1038 | /* Try to emit insns to load srcval (that cannot fit into signed 12-bit) |
1039 | into dst with synthesizing a such constant value from a sequence of | |
1040 | load-immediate / arithmetic ones, instead of a L32R instruction | |
1041 | (plus a constant in litpool). */ | |
1042 | ||
cd02f15f TJJS |
1043 | static int |
1044 | xtensa_constantsynth_2insn (rtx dst, HOST_WIDE_INT srcval, | |
1045 | rtx (*gen_op)(rtx, HOST_WIDE_INT), | |
1046 | HOST_WIDE_INT op_imm) | |
1047 | { | |
1884f897 TJJS |
1048 | HOST_WIDE_INT imm = INT_MAX; |
1049 | rtx x = NULL_RTX; | |
1050 | int shift; | |
cd02f15f | 1051 | |
1884f897 TJJS |
1052 | gcc_assert (REG_P (dst)); |
1053 | ||
1054 | shift = exact_log2 (srcval + 1); | |
cd02f15f TJJS |
1055 | if (IN_RANGE (shift, 1, 31)) |
1056 | { | |
1884f897 TJJS |
1057 | imm = -1; |
1058 | x = gen_lshrsi3 (dst, dst, GEN_INT (32 - shift)); | |
1059 | } | |
1060 | ||
1061 | ||
1062 | shift = ctz_hwi (srcval); | |
1063 | if ((!x || (TARGET_DENSITY && ! IN_RANGE (imm, -32, 95))) | |
1064 | && xtensa_simm12b (srcval >> shift)) | |
1065 | { | |
1066 | imm = srcval >> shift; | |
1067 | x = gen_ashlsi3 (dst, dst, GEN_INT (shift)); | |
cd02f15f TJJS |
1068 | } |
1069 | ||
1884f897 TJJS |
1070 | if ((!x || (TARGET_DENSITY && ! IN_RANGE (imm, -32, 95))) |
1071 | && IN_RANGE (srcval, (-2048 - 32768), (2047 + 32512))) | |
cd02f15f TJJS |
1072 | { |
1073 | HOST_WIDE_INT imm0, imm1; | |
1074 | ||
1075 | if (srcval < -32768) | |
1076 | imm1 = -32768; | |
1077 | else if (srcval > 32512) | |
1078 | imm1 = 32512; | |
1079 | else | |
1080 | imm1 = srcval & ~255; | |
1081 | imm0 = srcval - imm1; | |
1082 | if (TARGET_DENSITY && imm1 < 32512 && IN_RANGE (imm0, 224, 255)) | |
1083 | imm0 -= 256, imm1 += 256; | |
1884f897 TJJS |
1084 | imm = imm0; |
1085 | x = gen_addsi3 (dst, dst, GEN_INT (imm1)); | |
cd02f15f TJJS |
1086 | } |
1087 | ||
1884f897 TJJS |
1088 | if (!x) |
1089 | return 0; | |
cd02f15f | 1090 | |
1884f897 TJJS |
1091 | emit_move_insn (dst, GEN_INT (imm)); |
1092 | emit_insn (x); | |
1093 | if (gen_op) | |
1094 | emit_move_insn (dst, gen_op (dst, op_imm)); | |
1095 | ||
1096 | return 1; | |
cd02f15f TJJS |
1097 | } |
1098 | ||
1099 | static rtx | |
1100 | xtensa_constantsynth_rtx_SLLI (rtx reg, HOST_WIDE_INT imm) | |
1101 | { | |
1102 | return gen_rtx_ASHIFT (SImode, reg, GEN_INT (imm)); | |
1103 | } | |
1104 | ||
1105 | static rtx | |
1106 | xtensa_constantsynth_rtx_ADDSUBX (rtx reg, HOST_WIDE_INT imm) | |
1107 | { | |
1108 | return imm == 7 | |
1109 | ? gen_rtx_MINUS (SImode, gen_rtx_ASHIFT (SImode, reg, GEN_INT (3)), | |
1110 | reg) | |
1111 | : gen_rtx_PLUS (SImode, gen_rtx_ASHIFT (SImode, reg, | |
1112 | GEN_INT (floor_log2 (imm - 1))), | |
1113 | reg); | |
1114 | } | |
1115 | ||
1116 | int | |
1117 | xtensa_constantsynth (rtx dst, HOST_WIDE_INT srcval) | |
1118 | { | |
1119 | /* No need for synthesizing for what fits into MOVI instruction. */ | |
1120 | if (xtensa_simm12b (srcval)) | |
1121 | return 0; | |
1122 | ||
1123 | /* 2-insns substitution. */ | |
1124 | if ((optimize_size || (optimize && xtensa_extra_l32r_costs >= 1)) | |
1125 | && xtensa_constantsynth_2insn (dst, srcval, NULL, 0)) | |
1126 | return 1; | |
1127 | ||
1128 | /* 3-insns substitution. */ | |
1129 | if (optimize > 1 && !optimize_size && xtensa_extra_l32r_costs >= 2) | |
1130 | { | |
1131 | int shift, divisor; | |
1132 | ||
1133 | /* 2-insns substitution followed by SLLI. */ | |
1134 | shift = ctz_hwi (srcval); | |
1135 | if (IN_RANGE (shift, 1, 31) && | |
1136 | xtensa_constantsynth_2insn (dst, srcval >> shift, | |
1137 | xtensa_constantsynth_rtx_SLLI, | |
1138 | shift)) | |
1139 | return 1; | |
1140 | ||
1141 | /* 2-insns substitution followed by ADDX[248] or SUBX8. */ | |
1142 | if (TARGET_ADDX) | |
1143 | for (divisor = 3; divisor <= 9; divisor += 2) | |
1144 | if (srcval % divisor == 0 && | |
1145 | xtensa_constantsynth_2insn (dst, srcval / divisor, | |
1146 | xtensa_constantsynth_rtx_ADDSUBX, | |
1147 | divisor)) | |
1148 | return 1; | |
75e5cc9c TJJS |
1149 | |
1150 | /* loading simm12 followed by left/right bitwise rotation: | |
1151 | MOVI + SSAI + SRC. */ | |
1152 | if ((srcval & 0x001FF800) == 0 | |
1153 | || (srcval & 0x001FF800) == 0x001FF800) | |
1154 | { | |
1155 | int32_t v; | |
1156 | ||
1157 | for (shift = 1; shift < 12; ++shift) | |
1158 | { | |
1159 | v = (int32_t)(((uint32_t)srcval >> shift) | |
1160 | | ((uint32_t)srcval << (32 - shift))); | |
1161 | if (xtensa_simm12b(v)) | |
1162 | { | |
1163 | emit_move_insn (dst, GEN_INT (v)); | |
1164 | emit_insn (gen_rotlsi3 (dst, dst, GEN_INT (shift))); | |
1165 | return 1; | |
1166 | } | |
1167 | } | |
1168 | for (shift = 1; shift < 12; ++shift) | |
1169 | { | |
1170 | v = (int32_t)(((uint32_t)srcval << shift) | |
1171 | | ((uint32_t)srcval >> (32 - shift))); | |
1172 | if (xtensa_simm12b(v)) | |
1173 | { | |
1174 | emit_move_insn (dst, GEN_INT (v)); | |
1175 | emit_insn (gen_rotrsi3 (dst, dst, GEN_INT (shift))); | |
1176 | return 1; | |
1177 | } | |
1178 | } | |
1179 | } | |
cd02f15f TJJS |
1180 | } |
1181 | ||
1182 | return 0; | |
1183 | } | |
1184 | ||
1185 | ||
03984308 | 1186 | /* Emit insns to move operands[1] into operands[0]. |
03984308 BW |
1187 | Return 1 if we have written out everything that needs to be done to |
1188 | do the move. Otherwise, return 0 and the caller will emit the move | |
1189 | normally. */ | |
1190 | ||
1191 | int | |
ef4bddc2 | 1192 | xtensa_emit_move_sequence (rtx *operands, machine_mode mode) |
03984308 | 1193 | { |
6a7a462c BW |
1194 | rtx src = operands[1]; |
1195 | ||
1196 | if (CONSTANT_P (src) | |
1197 | && (GET_CODE (src) != CONST_INT || ! xtensa_simm12b (INTVAL (src)))) | |
03984308 | 1198 | { |
6a7a462c BW |
1199 | rtx dst = operands[0]; |
1200 | ||
1201 | if (xtensa_tls_referenced_p (src)) | |
1202 | { | |
1203 | rtx addend = NULL; | |
1204 | ||
1205 | if (GET_CODE (src) == CONST && GET_CODE (XEXP (src, 0)) == PLUS) | |
1206 | { | |
1207 | addend = XEXP (XEXP (src, 0), 1); | |
1208 | src = XEXP (XEXP (src, 0), 0); | |
1209 | } | |
1210 | ||
1211 | src = xtensa_legitimize_tls_address (src); | |
1212 | if (addend) | |
1213 | { | |
1214 | src = gen_rtx_PLUS (mode, src, addend); | |
1215 | src = force_operand (src, dst); | |
1216 | } | |
1217 | emit_move_insn (dst, src); | |
1218 | return 1; | |
1219 | } | |
1220 | ||
479b6f44 TJJS |
1221 | if (! TARGET_AUTO_LITPOOLS && ! TARGET_CONST16 |
1222 | && ! (CONST_INT_P (src) && can_create_pseudo_p ())) | |
6a7a462c BW |
1223 | { |
1224 | src = force_const_mem (SImode, src); | |
1225 | operands[1] = src; | |
1226 | } | |
f42f5a1b BW |
1227 | |
1228 | /* PC-relative loads are always SImode, and CONST16 is only | |
1229 | supported in the movsi pattern, so add a SUBREG for any other | |
1230 | (smaller) mode. */ | |
1231 | ||
1232 | if (mode != SImode) | |
1233 | { | |
6a7a462c | 1234 | if (register_operand (dst, mode)) |
f42f5a1b | 1235 | { |
6a7a462c | 1236 | emit_move_insn (simplify_gen_subreg (SImode, dst, mode, 0), src); |
f42f5a1b BW |
1237 | return 1; |
1238 | } | |
1239 | else | |
1240 | { | |
6a7a462c BW |
1241 | src = force_reg (SImode, src); |
1242 | src = gen_lowpart_SUBREG (mode, src); | |
1243 | operands[1] = src; | |
f42f5a1b BW |
1244 | } |
1245 | } | |
03984308 BW |
1246 | } |
1247 | ||
75ab2f0e | 1248 | if (can_create_pseudo_p () |
997b8b4d BW |
1249 | && !xtensa_valid_move (mode, operands)) |
1250 | operands[1] = force_reg (mode, operands[1]); | |
03984308 | 1251 | |
997b8b4d | 1252 | operands[1] = xtensa_copy_incoming_a7 (operands[1]); |
03984308 BW |
1253 | |
1254 | /* During reload we don't want to emit (subreg:X (mem:Y)) since that | |
638db43e BW |
1255 | instruction won't be recognized after reload, so we remove the |
1256 | subreg and adjust mem accordingly. */ | |
03984308 BW |
1257 | if (reload_in_progress) |
1258 | { | |
1259 | operands[0] = fixup_subreg_mem (operands[0]); | |
1260 | operands[1] = fixup_subreg_mem (operands[1]); | |
1261 | } | |
1262 | return 0; | |
1263 | } | |
1264 | ||
f42f5a1b | 1265 | |
03984308 | 1266 | static rtx |
ffbc8796 | 1267 | fixup_subreg_mem (rtx x) |
03984308 BW |
1268 | { |
1269 | if (GET_CODE (x) == SUBREG | |
1270 | && GET_CODE (SUBREG_REG (x)) == REG | |
1271 | && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER) | |
1272 | { | |
1273 | rtx temp = | |
1274 | gen_rtx_SUBREG (GET_MODE (x), | |
f2034d06 | 1275 | reg_equiv_mem (REGNO (SUBREG_REG (x))), |
03984308 | 1276 | SUBREG_BYTE (x)); |
55a2c322 | 1277 | x = alter_subreg (&temp, true); |
03984308 BW |
1278 | } |
1279 | return x; | |
1280 | } | |
1281 | ||
1282 | ||
997b8b4d BW |
1283 | /* Check if an incoming argument in a7 is expected to be used soon and |
1284 | if OPND is a register or register pair that includes a7. If so, | |
1285 | create a new pseudo and copy a7 into that pseudo at the very | |
1286 | beginning of the function, followed by the special "set_frame_ptr" | |
1287 | unspec_volatile insn. The return value is either the original | |
1288 | operand, if it is not a7, or the new pseudo containing a copy of | |
1289 | the incoming argument. This is necessary because the register | |
1290 | allocator will ignore conflicts with a7 and may either assign some | |
1291 | other pseudo to a7 or use a7 as the hard_frame_pointer, clobbering | |
1292 | the incoming argument in a7. By copying the argument out of a7 as | |
1293 | the very first thing, and then immediately following that with an | |
1294 | unspec_volatile to keep the scheduler away, we should avoid any | |
1295 | problems. Putting the set_frame_ptr insn at the beginning, with | |
1296 | only the a7 copy before it, also makes it easier for the prologue | |
1297 | expander to initialize the frame pointer after the a7 copy and to | |
1298 | fix up the a7 copy to use the stack pointer instead of the frame | |
1299 | pointer. */ | |
58db834b | 1300 | |
997b8b4d BW |
1301 | rtx |
1302 | xtensa_copy_incoming_a7 (rtx opnd) | |
58db834b | 1303 | { |
997b8b4d BW |
1304 | rtx entry_insns = 0; |
1305 | rtx reg, tmp; | |
ef4bddc2 | 1306 | machine_mode mode; |
997b8b4d BW |
1307 | |
1308 | if (!cfun->machine->need_a7_copy) | |
1309 | return opnd; | |
1310 | ||
1311 | /* This function should never be called again once a7 has been copied. */ | |
177b6be0 | 1312 | gcc_assert (!cfun->machine->set_frame_ptr_insn); |
997b8b4d BW |
1313 | |
1314 | mode = GET_MODE (opnd); | |
1315 | ||
1316 | /* The operand using a7 may come in a later instruction, so just return | |
1317 | the original operand if it doesn't use a7. */ | |
1318 | reg = opnd; | |
1319 | if (GET_CODE (reg) == SUBREG) | |
58db834b | 1320 | { |
177b6be0 | 1321 | gcc_assert (SUBREG_BYTE (reg) == 0); |
997b8b4d BW |
1322 | reg = SUBREG_REG (reg); |
1323 | } | |
1324 | if (GET_CODE (reg) != REG | |
1325 | || REGNO (reg) > A7_REG | |
a93072ca | 1326 | || REGNO (reg) + hard_regno_nregs (A7_REG, mode) <= A7_REG) |
997b8b4d | 1327 | return opnd; |
e6aecf8e | 1328 | |
997b8b4d | 1329 | /* 1-word args will always be in a7; 2-word args in a6/a7. */ |
a93072ca | 1330 | gcc_assert (REGNO (reg) + hard_regno_nregs (A7_REG, mode) - 1 == A7_REG); |
58db834b | 1331 | |
997b8b4d | 1332 | cfun->machine->need_a7_copy = false; |
58db834b | 1333 | |
997b8b4d BW |
1334 | /* Copy a7 to a new pseudo at the function entry. Use gen_raw_REG to |
1335 | create the REG for a7 so that hard_frame_pointer_rtx is not used. */ | |
58db834b | 1336 | |
0d8442b8 | 1337 | start_sequence (); |
997b8b4d | 1338 | tmp = gen_reg_rtx (mode); |
58db834b | 1339 | |
997b8b4d BW |
1340 | switch (mode) |
1341 | { | |
4e10a5a7 RS |
1342 | case E_DFmode: |
1343 | case E_DImode: | |
b412869c BW |
1344 | /* Copy the value out of A7 here but keep the first word in A6 until |
1345 | after the set_frame_ptr insn. Otherwise, the register allocator | |
1346 | may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming | |
1347 | value. */ | |
997b8b4d BW |
1348 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), |
1349 | gen_raw_REG (SImode, A7_REG))); | |
1350 | break; | |
4e10a5a7 | 1351 | case E_SFmode: |
997b8b4d BW |
1352 | emit_insn (gen_movsf_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1353 | break; | |
4e10a5a7 | 1354 | case E_SImode: |
997b8b4d BW |
1355 | emit_insn (gen_movsi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1356 | break; | |
4e10a5a7 | 1357 | case E_HImode: |
997b8b4d BW |
1358 | emit_insn (gen_movhi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1359 | break; | |
4e10a5a7 | 1360 | case E_QImode: |
997b8b4d BW |
1361 | emit_insn (gen_movqi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1362 | break; | |
1363 | default: | |
177b6be0 | 1364 | gcc_unreachable (); |
58db834b BW |
1365 | } |
1366 | ||
997b8b4d | 1367 | cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); |
b412869c BW |
1368 | |
1369 | /* For DF and DI mode arguments, copy the incoming value in A6 now. */ | |
1370 | if (mode == DFmode || mode == DImode) | |
1371 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), | |
1372 | gen_rtx_REG (SImode, A7_REG - 1))); | |
997b8b4d BW |
1373 | entry_insns = get_insns (); |
1374 | end_sequence (); | |
1375 | ||
1376 | if (cfun->machine->vararg_a7) | |
1377 | { | |
0d8442b8 BW |
1378 | /* This is called from within builtin_saveregs, which will insert the |
1379 | saveregs code at the function entry, ahead of anything placed at | |
1380 | the function entry now. Instead, save the sequence to be inserted | |
1381 | at the beginning of the saveregs code. */ | |
1382 | cfun->machine->vararg_a7_copy = entry_insns; | |
997b8b4d BW |
1383 | } |
1384 | else | |
1385 | { | |
1386 | /* Put entry_insns after the NOTE that starts the function. If | |
1387 | this is inside a start_sequence, make the outer-level insn | |
1388 | chain current, so the code is placed at the start of the | |
1389 | function. */ | |
1390 | push_topmost_sequence (); | |
0d8442b8 BW |
1391 | /* Do not use entry_of_function() here. This is called from within |
1392 | expand_function_start, when the CFG still holds GIMPLE. */ | |
997b8b4d BW |
1393 | emit_insn_after (entry_insns, get_insns ()); |
1394 | pop_topmost_sequence (); | |
1395 | } | |
1396 | ||
1397 | return tmp; | |
58db834b BW |
1398 | } |
1399 | ||
1400 | ||
a46bbb5a BW |
1401 | /* Try to expand a block move operation to a sequence of RTL move |
1402 | instructions. If not optimizing, or if the block size is not a | |
1403 | constant, or if the block is too large, the expansion fails and GCC | |
1404 | falls back to calling memcpy(). | |
03984308 BW |
1405 | |
1406 | operands[0] is the destination | |
1407 | operands[1] is the source | |
1408 | operands[2] is the length | |
1409 | operands[3] is the alignment */ | |
1410 | ||
1411 | int | |
ffbc8796 | 1412 | xtensa_expand_block_move (rtx *operands) |
03984308 | 1413 | { |
ef4bddc2 | 1414 | static const machine_mode mode_from_align[] = |
7eda7cda RH |
1415 | { |
1416 | VOIDmode, QImode, HImode, VOIDmode, SImode, | |
1417 | }; | |
1418 | ||
1419 | rtx dst_mem = operands[0]; | |
1420 | rtx src_mem = operands[1]; | |
1421 | HOST_WIDE_INT bytes, align; | |
03984308 | 1422 | int num_pieces, move_ratio; |
7eda7cda | 1423 | rtx temp[2]; |
ef4bddc2 | 1424 | machine_mode mode[2]; |
7eda7cda RH |
1425 | int amount[2]; |
1426 | bool active[2]; | |
1427 | int phase = 0; | |
1428 | int next; | |
1429 | int offset_ld = 0; | |
1430 | int offset_st = 0; | |
1431 | rtx x; | |
03984308 | 1432 | |
3bbc2af6 | 1433 | /* If this is not a fixed size move, just call memcpy. */ |
03984308 BW |
1434 | if (!optimize || (GET_CODE (operands[2]) != CONST_INT)) |
1435 | return 0; | |
1436 | ||
7eda7cda RH |
1437 | bytes = INTVAL (operands[2]); |
1438 | align = INTVAL (operands[3]); | |
1439 | ||
3bbc2af6 | 1440 | /* Anything to move? */ |
03984308 | 1441 | if (bytes <= 0) |
7eda7cda | 1442 | return 0; |
03984308 BW |
1443 | |
1444 | if (align > MOVE_MAX) | |
1445 | align = MOVE_MAX; | |
1446 | ||
3bbc2af6 | 1447 | /* Decide whether to expand inline based on the optimization level. */ |
03984308 BW |
1448 | move_ratio = 4; |
1449 | if (optimize > 2) | |
1450 | move_ratio = LARGEST_MOVE_RATIO; | |
3397563a | 1451 | num_pieces = (bytes / align) + ((bytes % align + 1) / 2); |
7eda7cda | 1452 | if (num_pieces > move_ratio) |
03984308 BW |
1453 | return 0; |
1454 | ||
7eda7cda RH |
1455 | x = XEXP (dst_mem, 0); |
1456 | if (!REG_P (x)) | |
1457 | { | |
1458 | x = force_reg (Pmode, x); | |
1459 | dst_mem = replace_equiv_address (dst_mem, x); | |
1460 | } | |
03984308 | 1461 | |
7eda7cda RH |
1462 | x = XEXP (src_mem, 0); |
1463 | if (!REG_P (x)) | |
1464 | { | |
1465 | x = force_reg (Pmode, x); | |
1466 | src_mem = replace_equiv_address (src_mem, x); | |
1467 | } | |
03984308 | 1468 | |
7eda7cda | 1469 | active[0] = active[1] = false; |
03984308 | 1470 | |
7eda7cda | 1471 | do |
03984308 | 1472 | { |
7eda7cda RH |
1473 | next = phase; |
1474 | phase ^= 1; | |
03984308 | 1475 | |
7eda7cda | 1476 | if (bytes > 0) |
03984308 | 1477 | { |
7eda7cda | 1478 | int next_amount; |
03984308 | 1479 | |
7eda7cda RH |
1480 | next_amount = (bytes >= 4 ? 4 : (bytes >= 2 ? 2 : 1)); |
1481 | next_amount = MIN (next_amount, align); | |
03984308 | 1482 | |
7eda7cda RH |
1483 | amount[next] = next_amount; |
1484 | mode[next] = mode_from_align[next_amount]; | |
1485 | temp[next] = gen_reg_rtx (mode[next]); | |
03984308 | 1486 | |
7eda7cda | 1487 | x = adjust_address (src_mem, mode[next], offset_ld); |
3397563a | 1488 | emit_move_insn (temp[next], x); |
03984308 | 1489 | |
7eda7cda RH |
1490 | offset_ld += next_amount; |
1491 | bytes -= next_amount; | |
1492 | active[next] = true; | |
1493 | } | |
03984308 | 1494 | |
7eda7cda RH |
1495 | if (active[phase]) |
1496 | { | |
1497 | active[phase] = false; | |
3397563a | 1498 | |
7eda7cda | 1499 | x = adjust_address (dst_mem, mode[phase], offset_st); |
3397563a | 1500 | emit_move_insn (x, temp[phase]); |
03984308 | 1501 | |
7eda7cda RH |
1502 | offset_st += amount[phase]; |
1503 | } | |
03984308 | 1504 | } |
7eda7cda | 1505 | while (active[next]); |
03984308 | 1506 | |
7eda7cda | 1507 | return 1; |
03984308 BW |
1508 | } |
1509 | ||
1510 | ||
6454b4a8 TJJS |
1511 | /* Try to expand a block set operation to a sequence of RTL move |
1512 | instructions. If not optimizing, or if the block size is not a | |
1513 | constant, or if the block is too large, or if the value to | |
1514 | initialize the block with is not a constant, the expansion | |
1515 | fails and GCC falls back to calling memset(). | |
1516 | ||
1517 | operands[0] is the destination | |
1518 | operands[1] is the length | |
1519 | operands[2] is the initialization value | |
1520 | operands[3] is the alignment */ | |
1521 | ||
1522 | static int | |
1523 | xtensa_sizeof_MOVI (HOST_WIDE_INT imm) | |
1524 | { | |
1525 | return (TARGET_DENSITY && IN_RANGE (imm, -32, 95)) ? 2 : 3; | |
1526 | } | |
1527 | ||
1528 | int | |
1529 | xtensa_expand_block_set_unrolled_loop (rtx *operands) | |
1530 | { | |
1531 | rtx dst_mem = operands[0]; | |
1532 | HOST_WIDE_INT bytes, value, align; | |
1533 | int expand_len, funccall_len; | |
1534 | rtx x, reg; | |
1535 | int offset; | |
1536 | ||
1537 | if (!CONST_INT_P (operands[1]) || !CONST_INT_P (operands[2])) | |
1538 | return 0; | |
1539 | ||
1540 | bytes = INTVAL (operands[1]); | |
1541 | if (bytes <= 0) | |
1542 | return 0; | |
1543 | value = (int8_t)INTVAL (operands[2]); | |
1544 | align = INTVAL (operands[3]); | |
1545 | if (align > MOVE_MAX) | |
1546 | align = MOVE_MAX; | |
1547 | ||
1548 | /* Insn expansion: holding the init value. | |
1549 | Either MOV(.N) or L32R w/litpool. */ | |
1550 | if (align == 1) | |
1551 | expand_len = xtensa_sizeof_MOVI (value); | |
1552 | else if (value == 0 || value == -1) | |
1553 | expand_len = TARGET_DENSITY ? 2 : 3; | |
1554 | else | |
1555 | expand_len = 3 + 4; | |
1556 | /* Insn expansion: a series of aligned memory stores. | |
1557 | Consist of S8I, S16I or S32I(.N). */ | |
1558 | expand_len += (bytes / align) * (TARGET_DENSITY | |
1559 | && align == 4 ? 2 : 3); | |
1560 | /* Insn expansion: the remainder, sub-aligned memory stores. | |
1561 | A combination of S8I and S16I as needed. */ | |
1562 | expand_len += ((bytes % align + 1) / 2) * 3; | |
1563 | ||
1564 | /* Function call: preparing two arguments. */ | |
1565 | funccall_len = xtensa_sizeof_MOVI (value); | |
1566 | funccall_len += xtensa_sizeof_MOVI (bytes); | |
1567 | /* Function call: calling memset(). */ | |
1568 | funccall_len += TARGET_LONGCALLS ? (3 + 4 + 3) : 3; | |
1569 | ||
1570 | /* Apply expansion bonus (2x) if optimizing for speed. */ | |
1571 | if (optimize > 1 && !optimize_size) | |
1572 | funccall_len *= 2; | |
1573 | ||
1574 | /* Decide whether to expand or not, based on the sum of the length | |
1575 | of instructions. */ | |
1576 | if (expand_len > funccall_len) | |
1577 | return 0; | |
1578 | ||
1579 | x = XEXP (dst_mem, 0); | |
1580 | if (!REG_P (x)) | |
1581 | dst_mem = replace_equiv_address (dst_mem, force_reg (Pmode, x)); | |
1582 | switch (align) | |
1583 | { | |
1584 | case 1: | |
1585 | break; | |
1586 | case 2: | |
1587 | value = (int16_t)((uint8_t)value * 0x0101U); | |
1588 | break; | |
1589 | case 4: | |
1590 | value = (int32_t)((uint8_t)value * 0x01010101U); | |
1591 | break; | |
1592 | default: | |
1593 | gcc_unreachable (); | |
1594 | } | |
1595 | reg = force_reg (SImode, GEN_INT (value)); | |
1596 | ||
1597 | offset = 0; | |
1598 | do | |
1599 | { | |
1600 | int unit_size = MIN (bytes, align); | |
1601 | machine_mode unit_mode = (unit_size >= 4 ? SImode : | |
1602 | (unit_size >= 2 ? HImode : | |
1603 | QImode)); | |
1604 | unit_size = GET_MODE_SIZE (unit_mode); | |
1605 | ||
1606 | emit_move_insn (adjust_address (dst_mem, unit_mode, offset), | |
1607 | unit_mode == SImode ? reg | |
1608 | : convert_to_mode (unit_mode, reg, true)); | |
1609 | ||
1610 | offset += unit_size; | |
1611 | bytes -= unit_size; | |
1612 | } | |
1613 | while (bytes > 0); | |
1614 | ||
1615 | return 1; | |
1616 | } | |
1617 | ||
1618 | int | |
1619 | xtensa_expand_block_set_small_loop (rtx *operands) | |
1620 | { | |
fddf0e10 | 1621 | HOST_WIDE_INT bytes, value, align, count; |
6454b4a8 TJJS |
1622 | int expand_len, funccall_len; |
1623 | rtx x, dst, end, reg; | |
1624 | machine_mode unit_mode; | |
1625 | rtx_code_label *label; | |
1626 | ||
1627 | if (!CONST_INT_P (operands[1]) || !CONST_INT_P (operands[2])) | |
1628 | return 0; | |
1629 | ||
1630 | bytes = INTVAL (operands[1]); | |
1631 | if (bytes <= 0) | |
1632 | return 0; | |
1633 | value = (int8_t)INTVAL (operands[2]); | |
1634 | align = INTVAL (operands[3]); | |
1635 | if (align > MOVE_MAX) | |
1636 | align = MOVE_MAX; | |
1637 | ||
1638 | /* Totally-aligned block only. */ | |
1639 | if (bytes % align != 0) | |
1640 | return 0; | |
fddf0e10 | 1641 | count = bytes / align; |
6454b4a8 | 1642 | |
fddf0e10 TJJS |
1643 | /* If the Loop Option (zero-overhead looping) is configured and active, |
1644 | almost no restrictions about the length of the block. */ | |
1645 | if (! (TARGET_LOOPS && optimize)) | |
1646 | { | |
1647 | /* If 4-byte aligned, small loop substitution is almost optimal, | |
1648 | thus limited to only offset to the end address for ADDI/ADDMI | |
1649 | instruction. */ | |
1650 | if (align == 4 | |
75ab2f0e | 1651 | && ! (bytes <= 127 || xtensa_simm8x256 (bytes))) |
fddf0e10 | 1652 | return 0; |
6454b4a8 | 1653 | |
fddf0e10 TJJS |
1654 | /* If no 4-byte aligned, loop count should be treated as the |
1655 | constraint. */ | |
1656 | if (align != 4 | |
1657 | && count > ((optimize > 1 && !optimize_size) ? 8 : 15)) | |
1658 | return 0; | |
1659 | } | |
6454b4a8 TJJS |
1660 | |
1661 | /* Insn expansion: holding the init value. | |
1662 | Either MOV(.N) or L32R w/litpool. */ | |
1663 | if (align == 1) | |
1664 | expand_len = xtensa_sizeof_MOVI (value); | |
1665 | else if (value == 0 || value == -1) | |
1666 | expand_len = TARGET_DENSITY ? 2 : 3; | |
1667 | else | |
1668 | expand_len = 3 + 4; | |
fddf0e10 TJJS |
1669 | if (TARGET_LOOPS && optimize) /* zero-overhead looping */ |
1670 | { | |
1671 | /* Insn translation: Either MOV(.N) or L32R w/litpool for the | |
1672 | loop count. */ | |
1673 | expand_len += xtensa_simm12b (count) ? xtensa_sizeof_MOVI (count) | |
1674 | : 3 + 4; | |
1675 | /* Insn translation: LOOP, the zero-overhead looping setup | |
1676 | instruction. */ | |
1677 | expand_len += 3; | |
1678 | /* Insn expansion: the loop body instructions. | |
1679 | For store, one of S8I, S16I or S32I(.N). | |
1680 | For advance, ADDI(.N). */ | |
1681 | expand_len += (TARGET_DENSITY && align == 4 ? 2 : 3) | |
1682 | + (TARGET_DENSITY ? 2 : 3); | |
1683 | } | |
1684 | else /* NO zero-overhead looping */ | |
1685 | { | |
1686 | /* Insn expansion: Either ADDI(.N) or ADDMI for the end address. */ | |
1687 | expand_len += bytes > 127 ? 3 | |
1688 | : (TARGET_DENSITY && bytes <= 15) ? 2 : 3; | |
1689 | /* Insn expansion: the loop body and branch instruction. | |
1690 | For store, one of S8I, S16I or S32I(.N). | |
1691 | For advance, ADDI(.N). | |
1692 | For branch, BNE. */ | |
1693 | expand_len += (TARGET_DENSITY && align == 4 ? 2 : 3) | |
1694 | + (TARGET_DENSITY ? 2 : 3) + 3; | |
1695 | } | |
6454b4a8 TJJS |
1696 | |
1697 | /* Function call: preparing two arguments. */ | |
1698 | funccall_len = xtensa_sizeof_MOVI (value); | |
1699 | funccall_len += xtensa_sizeof_MOVI (bytes); | |
1700 | /* Function call: calling memset(). */ | |
1701 | funccall_len += TARGET_LONGCALLS ? (3 + 4 + 3) : 3; | |
1702 | ||
1703 | /* Apply expansion bonus (2x) if optimizing for speed. */ | |
1704 | if (optimize > 1 && !optimize_size) | |
1705 | funccall_len *= 2; | |
1706 | ||
1707 | /* Decide whether to expand or not, based on the sum of the length | |
1708 | of instructions. */ | |
1709 | if (expand_len > funccall_len) | |
1710 | return 0; | |
1711 | ||
1712 | x = XEXP (operands[0], 0); | |
1713 | if (!REG_P (x)) | |
1714 | x = XEXP (replace_equiv_address (operands[0], force_reg (Pmode, x)), 0); | |
1715 | dst = gen_reg_rtx (SImode); | |
1716 | emit_move_insn (dst, x); | |
1717 | end = gen_reg_rtx (SImode); | |
fddf0e10 TJJS |
1718 | if (TARGET_LOOPS && optimize) |
1719 | x = force_reg (SImode, operands[1] /* the length */); | |
1720 | else | |
1721 | x = operands[1]; | |
1722 | emit_insn (gen_addsi3 (end, dst, x)); | |
6454b4a8 TJJS |
1723 | switch (align) |
1724 | { | |
1725 | case 1: | |
1726 | unit_mode = QImode; | |
1727 | break; | |
1728 | case 2: | |
1729 | value = (int16_t)((uint8_t)value * 0x0101U); | |
1730 | unit_mode = HImode; | |
1731 | break; | |
1732 | case 4: | |
1733 | value = (int32_t)((uint8_t)value * 0x01010101U); | |
1734 | unit_mode = SImode; | |
1735 | break; | |
1736 | default: | |
1737 | gcc_unreachable (); | |
1738 | } | |
1739 | reg = force_reg (unit_mode, GEN_INT (value)); | |
1740 | ||
1741 | label = gen_label_rtx (); | |
1742 | emit_label (label); | |
1743 | emit_move_insn (gen_rtx_MEM (unit_mode, dst), reg); | |
1744 | emit_insn (gen_addsi3 (dst, dst, GEN_INT (align))); | |
1745 | emit_cmp_and_jump_insns (dst, end, NE, const0_rtx, SImode, true, label); | |
1746 | ||
1747 | return 1; | |
1748 | } | |
1749 | ||
1750 | ||
03984308 | 1751 | void |
ffbc8796 | 1752 | xtensa_expand_nonlocal_goto (rtx *operands) |
03984308 BW |
1753 | { |
1754 | rtx goto_handler = operands[1]; | |
1755 | rtx containing_fp = operands[3]; | |
1756 | ||
3bbc2af6 KH |
1757 | /* Generate a call to "__xtensa_nonlocal_goto" (in libgcc); the code |
1758 | is too big to generate in-line. */ | |
03984308 BW |
1759 | |
1760 | if (GET_CODE (containing_fp) != REG) | |
1761 | containing_fp = force_reg (Pmode, containing_fp); | |
1762 | ||
03984308 | 1763 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_nonlocal_goto"), |
db69559b | 1764 | LCT_NORMAL, VOIDmode, |
03984308 BW |
1765 | containing_fp, Pmode, |
1766 | goto_handler, Pmode); | |
1767 | } | |
1768 | ||
1769 | ||
e2500fed | 1770 | static struct machine_function * |
ffbc8796 | 1771 | xtensa_init_machine_status (void) |
03984308 | 1772 | { |
766090c2 | 1773 | return ggc_cleared_alloc<machine_function> (); |
03984308 BW |
1774 | } |
1775 | ||
1776 | ||
2a48b790 BW |
1777 | /* Shift VAL of mode MODE left by COUNT bits. */ |
1778 | ||
1779 | static inline rtx | |
ef4bddc2 | 1780 | xtensa_expand_mask_and_shift (rtx val, machine_mode mode, rtx count) |
2a48b790 BW |
1781 | { |
1782 | val = expand_simple_binop (SImode, AND, val, GEN_INT (GET_MODE_MASK (mode)), | |
1783 | NULL_RTX, 1, OPTAB_DIRECT); | |
1784 | return expand_simple_binop (SImode, ASHIFT, val, count, | |
1785 | NULL_RTX, 1, OPTAB_DIRECT); | |
1786 | } | |
1787 | ||
1788 | ||
1789 | /* Structure to hold the initial parameters for a compare_and_swap operation | |
1790 | in HImode and QImode. */ | |
1791 | ||
1792 | struct alignment_context | |
1793 | { | |
1794 | rtx memsi; /* SI aligned memory location. */ | |
1795 | rtx shift; /* Bit offset with regard to lsb. */ | |
1796 | rtx modemask; /* Mask of the HQImode shifted by SHIFT bits. */ | |
1797 | rtx modemaski; /* ~modemask */ | |
1798 | }; | |
1799 | ||
1800 | ||
1801 | /* Initialize structure AC for word access to HI and QI mode memory. */ | |
1802 | ||
1803 | static void | |
1804 | init_alignment_context (struct alignment_context *ac, rtx mem) | |
1805 | { | |
ef4bddc2 | 1806 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1807 | rtx byteoffset = NULL_RTX; |
1808 | bool aligned = (MEM_ALIGN (mem) >= GET_MODE_BITSIZE (SImode)); | |
1809 | ||
1810 | if (aligned) | |
1811 | ac->memsi = adjust_address (mem, SImode, 0); /* Memory is aligned. */ | |
1812 | else | |
1813 | { | |
1814 | /* Alignment is unknown. */ | |
1815 | rtx addr, align; | |
1816 | ||
1817 | /* Force the address into a register. */ | |
1818 | addr = force_reg (Pmode, XEXP (mem, 0)); | |
1819 | ||
1820 | /* Align it to SImode. */ | |
1821 | align = expand_simple_binop (Pmode, AND, addr, | |
1822 | GEN_INT (-GET_MODE_SIZE (SImode)), | |
1823 | NULL_RTX, 1, OPTAB_DIRECT); | |
1824 | /* Generate MEM. */ | |
1825 | ac->memsi = gen_rtx_MEM (SImode, align); | |
1826 | MEM_VOLATILE_P (ac->memsi) = MEM_VOLATILE_P (mem); | |
1827 | set_mem_alias_set (ac->memsi, ALIAS_SET_MEMORY_BARRIER); | |
1828 | set_mem_align (ac->memsi, GET_MODE_BITSIZE (SImode)); | |
1829 | ||
1830 | byteoffset = expand_simple_binop (Pmode, AND, addr, | |
1831 | GEN_INT (GET_MODE_SIZE (SImode) - 1), | |
1832 | NULL_RTX, 1, OPTAB_DIRECT); | |
1833 | } | |
1834 | ||
1835 | /* Calculate shiftcount. */ | |
1836 | if (TARGET_BIG_ENDIAN) | |
1837 | { | |
1838 | ac->shift = GEN_INT (GET_MODE_SIZE (SImode) - GET_MODE_SIZE (mode)); | |
1839 | if (!aligned) | |
1840 | ac->shift = expand_simple_binop (SImode, MINUS, ac->shift, byteoffset, | |
1841 | NULL_RTX, 1, OPTAB_DIRECT); | |
1842 | } | |
1843 | else | |
1844 | { | |
1845 | if (aligned) | |
1846 | ac->shift = NULL_RTX; | |
1847 | else | |
1848 | ac->shift = byteoffset; | |
1849 | } | |
1850 | ||
1851 | if (ac->shift != NULL_RTX) | |
1852 | { | |
1853 | /* Shift is the byte count, but we need the bitcount. */ | |
91767ed1 MF |
1854 | gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0); |
1855 | ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift, | |
1856 | GEN_INT (exact_log2 (BITS_PER_UNIT)), | |
2a48b790 BW |
1857 | NULL_RTX, 1, OPTAB_DIRECT); |
1858 | ac->modemask = expand_simple_binop (SImode, ASHIFT, | |
1859 | GEN_INT (GET_MODE_MASK (mode)), | |
1860 | ac->shift, | |
1861 | NULL_RTX, 1, OPTAB_DIRECT); | |
1862 | } | |
1863 | else | |
1864 | ac->modemask = GEN_INT (GET_MODE_MASK (mode)); | |
1865 | ||
1866 | ac->modemaski = expand_simple_unop (SImode, NOT, ac->modemask, NULL_RTX, 1); | |
1867 | } | |
1868 | ||
1869 | ||
1870 | /* Expand an atomic compare and swap operation for HImode and QImode. | |
1871 | MEM is the memory location, CMP the old value to compare MEM with | |
0a2aaacc | 1872 | and NEW_RTX the value to set if CMP == MEM. */ |
2a48b790 BW |
1873 | |
1874 | void | |
0a2aaacc | 1875 | xtensa_expand_compare_and_swap (rtx target, rtx mem, rtx cmp, rtx new_rtx) |
2a48b790 | 1876 | { |
ef4bddc2 | 1877 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1878 | struct alignment_context ac; |
1879 | rtx tmp, cmpv, newv, val; | |
1880 | rtx oldval = gen_reg_rtx (SImode); | |
1881 | rtx res = gen_reg_rtx (SImode); | |
240a513f DM |
1882 | rtx_code_label *csloop = gen_label_rtx (); |
1883 | rtx_code_label *csend = gen_label_rtx (); | |
2a48b790 BW |
1884 | |
1885 | init_alignment_context (&ac, mem); | |
1886 | ||
1887 | if (ac.shift != NULL_RTX) | |
1888 | { | |
1889 | cmp = xtensa_expand_mask_and_shift (cmp, mode, ac.shift); | |
0a2aaacc | 1890 | new_rtx = xtensa_expand_mask_and_shift (new_rtx, mode, ac.shift); |
2a48b790 BW |
1891 | } |
1892 | ||
1893 | /* Load the surrounding word into VAL with the MEM value masked out. */ | |
1894 | val = force_reg (SImode, expand_simple_binop (SImode, AND, ac.memsi, | |
1895 | ac.modemaski, NULL_RTX, 1, | |
1896 | OPTAB_DIRECT)); | |
1897 | emit_label (csloop); | |
1898 | ||
0a2aaacc | 1899 | /* Patch CMP and NEW_RTX into VAL at correct position. */ |
2a48b790 BW |
1900 | cmpv = force_reg (SImode, expand_simple_binop (SImode, IOR, cmp, val, |
1901 | NULL_RTX, 1, OPTAB_DIRECT)); | |
0a2aaacc | 1902 | newv = force_reg (SImode, expand_simple_binop (SImode, IOR, new_rtx, val, |
2a48b790 BW |
1903 | NULL_RTX, 1, OPTAB_DIRECT)); |
1904 | ||
1905 | /* Jump to end if we're done. */ | |
1906 | emit_insn (gen_sync_compare_and_swapsi (res, ac.memsi, cmpv, newv)); | |
1907 | emit_cmp_and_jump_insns (res, cmpv, EQ, const0_rtx, SImode, true, csend); | |
1908 | ||
1909 | /* Check for changes outside mode. */ | |
1910 | emit_move_insn (oldval, val); | |
1911 | tmp = expand_simple_binop (SImode, AND, res, ac.modemaski, | |
1912 | val, 1, OPTAB_DIRECT); | |
1913 | if (tmp != val) | |
1914 | emit_move_insn (val, tmp); | |
1915 | ||
1916 | /* Loop internal if so. */ | |
1917 | emit_cmp_and_jump_insns (oldval, val, NE, const0_rtx, SImode, true, csloop); | |
1918 | ||
1919 | emit_label (csend); | |
1920 | ||
1921 | /* Return the correct part of the bitfield. */ | |
1922 | convert_move (target, | |
1923 | (ac.shift == NULL_RTX ? res | |
1924 | : expand_simple_binop (SImode, LSHIFTRT, res, ac.shift, | |
1925 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1926 | 1); | |
1927 | } | |
1928 | ||
1929 | ||
1930 | /* Expand an atomic operation CODE of mode MODE (either HImode or QImode -- | |
1931 | the default expansion works fine for SImode). MEM is the memory location | |
1932 | and VAL the value to play with. If AFTER is true then store the value | |
1933 | MEM holds after the operation, if AFTER is false then store the value MEM | |
1934 | holds before the operation. If TARGET is zero then discard that value, else | |
1935 | store it to TARGET. */ | |
1936 | ||
1937 | void | |
1938 | xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val, | |
1939 | bool after) | |
1940 | { | |
ef4bddc2 | 1941 | machine_mode mode = GET_MODE (mem); |
2a48b790 | 1942 | struct alignment_context ac; |
240a513f | 1943 | rtx_code_label *csloop = gen_label_rtx (); |
2a48b790 BW |
1944 | rtx cmp, tmp; |
1945 | rtx old = gen_reg_rtx (SImode); | |
0a2aaacc | 1946 | rtx new_rtx = gen_reg_rtx (SImode); |
2a48b790 BW |
1947 | rtx orig = NULL_RTX; |
1948 | ||
1949 | init_alignment_context (&ac, mem); | |
1950 | ||
1951 | /* Prepare values before the compare-and-swap loop. */ | |
1952 | if (ac.shift != NULL_RTX) | |
1953 | val = xtensa_expand_mask_and_shift (val, mode, ac.shift); | |
1954 | switch (code) | |
1955 | { | |
1956 | case PLUS: | |
1957 | case MINUS: | |
1958 | orig = gen_reg_rtx (SImode); | |
1959 | convert_move (orig, val, 1); | |
1960 | break; | |
1961 | ||
1962 | case SET: | |
1963 | case IOR: | |
1964 | case XOR: | |
1965 | break; | |
1966 | ||
1967 | case MULT: /* NAND */ | |
1968 | case AND: | |
1969 | /* val = "11..1<val>11..1" */ | |
1970 | val = expand_simple_binop (SImode, XOR, val, ac.modemaski, | |
1971 | NULL_RTX, 1, OPTAB_DIRECT); | |
1972 | break; | |
1973 | ||
1974 | default: | |
1975 | gcc_unreachable (); | |
1976 | } | |
1977 | ||
1978 | /* Load full word. Subsequent loads are performed by S32C1I. */ | |
1979 | cmp = force_reg (SImode, ac.memsi); | |
1980 | ||
1981 | emit_label (csloop); | |
1982 | emit_move_insn (old, cmp); | |
1983 | ||
1984 | switch (code) | |
1985 | { | |
1986 | case PLUS: | |
1987 | case MINUS: | |
1988 | val = expand_simple_binop (SImode, code, old, orig, | |
1989 | NULL_RTX, 1, OPTAB_DIRECT); | |
1990 | val = expand_simple_binop (SImode, AND, val, ac.modemask, | |
1991 | NULL_RTX, 1, OPTAB_DIRECT); | |
1992 | /* FALLTHRU */ | |
1993 | case SET: | |
1994 | tmp = expand_simple_binop (SImode, AND, old, ac.modemaski, | |
1995 | NULL_RTX, 1, OPTAB_DIRECT); | |
1996 | tmp = expand_simple_binop (SImode, IOR, tmp, val, | |
0a2aaacc | 1997 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1998 | break; |
1999 | ||
2000 | case AND: | |
2001 | case IOR: | |
2002 | case XOR: | |
2003 | tmp = expand_simple_binop (SImode, code, old, val, | |
0a2aaacc | 2004 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
2005 | break; |
2006 | ||
2007 | case MULT: /* NAND */ | |
2a17b239 | 2008 | tmp = expand_simple_binop (SImode, AND, old, val, |
2a48b790 | 2009 | NULL_RTX, 1, OPTAB_DIRECT); |
2a17b239 | 2010 | tmp = expand_simple_binop (SImode, XOR, tmp, ac.modemask, |
0a2aaacc | 2011 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
2012 | break; |
2013 | ||
2014 | default: | |
2015 | gcc_unreachable (); | |
2016 | } | |
2017 | ||
0a2aaacc KG |
2018 | if (tmp != new_rtx) |
2019 | emit_move_insn (new_rtx, tmp); | |
2020 | emit_insn (gen_sync_compare_and_swapsi (cmp, ac.memsi, old, new_rtx)); | |
2a48b790 BW |
2021 | emit_cmp_and_jump_insns (cmp, old, NE, const0_rtx, SImode, true, csloop); |
2022 | ||
2023 | if (target) | |
2024 | { | |
0a2aaacc | 2025 | tmp = (after ? new_rtx : cmp); |
2a48b790 BW |
2026 | convert_move (target, |
2027 | (ac.shift == NULL_RTX ? tmp | |
2028 | : expand_simple_binop (SImode, LSHIFTRT, tmp, ac.shift, | |
2029 | NULL_RTX, 1, OPTAB_DIRECT)), | |
2030 | 1); | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | ||
03984308 | 2035 | void |
ffbc8796 | 2036 | xtensa_setup_frame_addresses (void) |
03984308 | 2037 | { |
b52b1749 | 2038 | /* Set flag to cause TARGET_FRAME_POINTER_REQUIRED to return true. */ |
03984308 BW |
2039 | cfun->machine->accesses_prev_frame = 1; |
2040 | ||
590e2636 MF |
2041 | if (TARGET_WINDOWED_ABI) |
2042 | emit_library_call | |
2043 | (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_libgcc_window_spill"), | |
db69559b | 2044 | LCT_NORMAL, VOIDmode); |
03984308 BW |
2045 | } |
2046 | ||
2047 | ||
638db43e BW |
2048 | /* Emit the assembly for the end of a zero-cost loop. Normally we just emit |
2049 | a comment showing where the end of the loop is. However, if there is a | |
03984308 | 2050 | label or a branch at the end of the loop then we need to place a nop |
638db43e | 2051 | there. If the loop ends with a label we need the nop so that branches |
839a4992 KH |
2052 | targeting that label will target the nop (and thus remain in the loop), |
2053 | instead of targeting the instruction after the loop (and thus exiting | |
638db43e | 2054 | the loop). If the loop ends with a branch, we need the nop in case the |
839a4992 | 2055 | branch is targeting a location inside the loop. When the branch |
03984308 BW |
2056 | executes it will cause the loop count to be decremented even if it is |
2057 | taken (because it is the last instruction in the loop), so we need to | |
2058 | nop after the branch to prevent the loop count from being decremented | |
638db43e | 2059 | when the branch is taken. */ |
03984308 BW |
2060 | |
2061 | void | |
240a513f | 2062 | xtensa_emit_loop_end (rtx_insn *insn, rtx *operands) |
03984308 BW |
2063 | { |
2064 | char done = 0; | |
2065 | ||
2066 | for (insn = PREV_INSN (insn); insn && !done; insn = PREV_INSN (insn)) | |
2067 | { | |
2068 | switch (GET_CODE (insn)) | |
2069 | { | |
2070 | case NOTE: | |
2071 | case BARRIER: | |
2072 | break; | |
2073 | ||
2074 | case CODE_LABEL: | |
0bd0703d | 2075 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
2076 | done = 1; |
2077 | break; | |
2078 | ||
2079 | default: | |
2080 | { | |
2081 | rtx body = PATTERN (insn); | |
2082 | ||
b64925dc | 2083 | if (JUMP_P (body)) |
03984308 | 2084 | { |
0bd0703d | 2085 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
2086 | done = 1; |
2087 | } | |
2088 | else if ((GET_CODE (body) != USE) | |
2089 | && (GET_CODE (body) != CLOBBER)) | |
2090 | done = 1; | |
2091 | } | |
2092 | break; | |
2093 | } | |
2094 | } | |
2095 | ||
6383386a | 2096 | output_asm_insn ("%1_LEND:", operands); |
03984308 BW |
2097 | } |
2098 | ||
2099 | ||
036a2b7a | 2100 | char * |
e1b193c1 | 2101 | xtensa_emit_branch (bool immed, rtx *operands) |
036a2b7a BW |
2102 | { |
2103 | static char result[64]; | |
e1b193c1 | 2104 | enum rtx_code code = GET_CODE (operands[3]); |
036a2b7a BW |
2105 | const char *op; |
2106 | ||
036a2b7a BW |
2107 | switch (code) |
2108 | { | |
e1b193c1 TJJS |
2109 | case EQ: op = "eq"; break; |
2110 | case NE: op = "ne"; break; | |
2111 | case LT: op = "lt"; break; | |
2112 | case GE: op = "ge"; break; | |
2113 | case LTU: op = "ltu"; break; | |
2114 | case GEU: op = "geu"; break; | |
036a2b7a BW |
2115 | default: gcc_unreachable (); |
2116 | } | |
2117 | ||
2118 | if (immed) | |
2119 | { | |
2120 | if (INTVAL (operands[1]) == 0) | |
2121 | sprintf (result, "b%sz%s\t%%0, %%2", op, | |
2122 | (TARGET_DENSITY && (code == EQ || code == NE)) ? ".n" : ""); | |
2123 | else | |
2124 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
2125 | } | |
2126 | else | |
2127 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
2128 | ||
2129 | return result; | |
2130 | } | |
2131 | ||
2132 | ||
036a2b7a BW |
2133 | char * |
2134 | xtensa_emit_movcc (bool inverted, bool isfp, bool isbool, rtx *operands) | |
2135 | { | |
2136 | static char result[64]; | |
2137 | enum rtx_code code; | |
2138 | const char *op; | |
2139 | ||
2140 | code = GET_CODE (operands[4]); | |
e1b193c1 TJJS |
2141 | if (inverted) |
2142 | code = reverse_condition (code); | |
036a2b7a BW |
2143 | if (isbool) |
2144 | { | |
2145 | switch (code) | |
2146 | { | |
e1b193c1 TJJS |
2147 | case EQ: op = "f"; break; |
2148 | case NE: op = "t"; break; | |
036a2b7a BW |
2149 | default: gcc_unreachable (); |
2150 | } | |
2151 | } | |
2152 | else | |
2153 | { | |
2154 | switch (code) | |
2155 | { | |
e1b193c1 TJJS |
2156 | case EQ: op = "eqz"; break; |
2157 | case NE: op = "nez"; break; | |
2158 | case LT: op = "ltz"; break; | |
2159 | case GE: op = "gez"; break; | |
036a2b7a BW |
2160 | default: gcc_unreachable (); |
2161 | } | |
2162 | } | |
2163 | ||
2164 | sprintf (result, "mov%s%s\t%%0, %%%d, %%1", | |
2165 | op, isfp ? ".s" : "", inverted ? 3 : 2); | |
2166 | return result; | |
2167 | } | |
2168 | ||
2169 | ||
43b0c56f TJJS |
2170 | void |
2171 | xtensa_prepare_expand_call (int callop, rtx *operands) | |
2172 | { | |
2173 | rtx addr = XEXP (operands[callop], 0); | |
2174 | ||
2175 | if (flag_pic && SYMBOL_REF_P (addr) | |
2176 | && (!SYMBOL_REF_LOCAL_P (addr) || SYMBOL_REF_EXTERNAL_P (addr))) | |
2177 | addr = gen_sym_PLT (addr); | |
2178 | ||
2179 | if (!call_insn_operand (addr, VOIDmode)) | |
2180 | XEXP (operands[callop], 0) = copy_to_mode_reg (Pmode, addr); | |
2181 | } | |
2182 | ||
2183 | ||
03984308 | 2184 | char * |
ffbc8796 | 2185 | xtensa_emit_call (int callop, rtx *operands) |
03984308 | 2186 | { |
b64a1b53 | 2187 | static char result[64]; |
03984308 BW |
2188 | rtx tgt = operands[callop]; |
2189 | ||
2190 | if (GET_CODE (tgt) == CONST_INT) | |
3904010d MF |
2191 | sprintf (result, "call%d\t" HOST_WIDE_INT_PRINT_HEX, |
2192 | WINDOW_SIZE, INTVAL (tgt)); | |
03984308 | 2193 | else if (register_operand (tgt, VOIDmode)) |
590e2636 | 2194 | sprintf (result, "callx%d\t%%%d", WINDOW_SIZE, callop); |
03984308 | 2195 | else |
590e2636 | 2196 | sprintf (result, "call%d\t%%%d", WINDOW_SIZE, callop); |
03984308 BW |
2197 | |
2198 | return result; | |
2199 | } | |
2200 | ||
2201 | ||
43b0c56f TJJS |
2202 | char * |
2203 | xtensa_emit_sibcall (int callop, rtx *operands) | |
2204 | { | |
2205 | static char result[64]; | |
2206 | rtx tgt = operands[callop]; | |
2207 | ||
75ab2f0e | 2208 | if (CONST_INT_P (tgt)) |
43b0c56f TJJS |
2209 | sprintf (result, "j.l\t" HOST_WIDE_INT_PRINT_HEX ", a9", |
2210 | INTVAL (tgt)); | |
2211 | else if (register_operand (tgt, VOIDmode)) | |
2212 | sprintf (result, "jx\t%%%d", callop); | |
2213 | else | |
2214 | sprintf (result, "j.l\t%%%d, a9", callop); | |
2215 | ||
2216 | return result; | |
2217 | } | |
2218 | ||
2219 | ||
da1f39e4 | 2220 | bool |
ef4bddc2 | 2221 | xtensa_legitimate_address_p (machine_mode mode, rtx addr, bool strict) |
da1f39e4 BW |
2222 | { |
2223 | /* Allow constant pool addresses. */ | |
2224 | if (mode != BLKmode && GET_MODE_SIZE (mode) >= UNITS_PER_WORD | |
6a7a462c BW |
2225 | && ! TARGET_CONST16 && constantpool_address_p (addr) |
2226 | && ! xtensa_tls_referenced_p (addr)) | |
da1f39e4 BW |
2227 | return true; |
2228 | ||
2229 | while (GET_CODE (addr) == SUBREG) | |
2230 | addr = SUBREG_REG (addr); | |
2231 | ||
2232 | /* Allow base registers. */ | |
2233 | if (GET_CODE (addr) == REG && BASE_REG_P (addr, strict)) | |
2234 | return true; | |
2235 | ||
2236 | /* Check for "register + offset" addressing. */ | |
2237 | if (GET_CODE (addr) == PLUS) | |
2238 | { | |
2239 | rtx xplus0 = XEXP (addr, 0); | |
2240 | rtx xplus1 = XEXP (addr, 1); | |
2241 | enum rtx_code code0; | |
2242 | enum rtx_code code1; | |
2243 | ||
2244 | while (GET_CODE (xplus0) == SUBREG) | |
2245 | xplus0 = SUBREG_REG (xplus0); | |
2246 | code0 = GET_CODE (xplus0); | |
2247 | ||
2248 | while (GET_CODE (xplus1) == SUBREG) | |
2249 | xplus1 = SUBREG_REG (xplus1); | |
2250 | code1 = GET_CODE (xplus1); | |
2251 | ||
2252 | /* Swap operands if necessary so the register is first. */ | |
2253 | if (code0 != REG && code1 == REG) | |
2254 | { | |
2255 | xplus0 = XEXP (addr, 1); | |
2256 | xplus1 = XEXP (addr, 0); | |
2257 | code0 = GET_CODE (xplus0); | |
2258 | code1 = GET_CODE (xplus1); | |
2259 | } | |
2260 | ||
2261 | if (code0 == REG && BASE_REG_P (xplus0, strict) | |
2262 | && code1 == CONST_INT | |
2263 | && xtensa_mem_offset (INTVAL (xplus1), mode)) | |
2264 | return true; | |
2265 | } | |
2266 | ||
2267 | return false; | |
2268 | } | |
2269 | ||
2270 | ||
6a7a462c BW |
2271 | /* Construct the SYMBOL_REF for the _TLS_MODULE_BASE_ symbol. */ |
2272 | ||
2273 | static GTY(()) rtx xtensa_tls_module_base_symbol; | |
2274 | ||
2275 | static rtx | |
2276 | xtensa_tls_module_base (void) | |
2277 | { | |
2278 | if (! xtensa_tls_module_base_symbol) | |
2279 | { | |
2280 | xtensa_tls_module_base_symbol = | |
2281 | gen_rtx_SYMBOL_REF (Pmode, "_TLS_MODULE_BASE_"); | |
2282 | SYMBOL_REF_FLAGS (xtensa_tls_module_base_symbol) | |
2283 | |= TLS_MODEL_GLOBAL_DYNAMIC << SYMBOL_FLAG_TLS_SHIFT; | |
2284 | } | |
2285 | ||
2286 | return xtensa_tls_module_base_symbol; | |
2287 | } | |
2288 | ||
2289 | ||
240a513f | 2290 | static rtx_insn * |
6a7a462c BW |
2291 | xtensa_call_tls_desc (rtx sym, rtx *retp) |
2292 | { | |
e1b8828b | 2293 | rtx fn, arg, a_io; |
240a513f | 2294 | rtx_insn *call_insn, *insns; |
6a7a462c BW |
2295 | |
2296 | start_sequence (); | |
2297 | fn = gen_reg_rtx (Pmode); | |
2298 | arg = gen_reg_rtx (Pmode); | |
e1b8828b | 2299 | a_io = gen_rtx_REG (Pmode, WINDOW_SIZE + 2); |
6a7a462c BW |
2300 | |
2301 | emit_insn (gen_tls_func (fn, sym)); | |
2302 | emit_insn (gen_tls_arg (arg, sym)); | |
e1b8828b MF |
2303 | emit_move_insn (a_io, arg); |
2304 | call_insn = emit_call_insn (gen_tls_call (a_io, fn, sym, const1_rtx)); | |
2305 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), a_io); | |
6a7a462c BW |
2306 | insns = get_insns (); |
2307 | end_sequence (); | |
2308 | ||
e1b8828b | 2309 | *retp = a_io; |
6a7a462c BW |
2310 | return insns; |
2311 | } | |
2312 | ||
2313 | ||
2314 | static rtx | |
2315 | xtensa_legitimize_tls_address (rtx x) | |
2316 | { | |
2317 | unsigned int model = SYMBOL_REF_TLS_MODEL (x); | |
240a513f DM |
2318 | rtx dest, tp, ret, modbase, base, addend; |
2319 | rtx_insn *insns; | |
6a7a462c BW |
2320 | |
2321 | dest = gen_reg_rtx (Pmode); | |
2322 | switch (model) | |
2323 | { | |
2324 | case TLS_MODEL_GLOBAL_DYNAMIC: | |
2325 | insns = xtensa_call_tls_desc (x, &ret); | |
2326 | emit_libcall_block (insns, dest, ret, x); | |
2327 | break; | |
2328 | ||
2329 | case TLS_MODEL_LOCAL_DYNAMIC: | |
2330 | base = gen_reg_rtx (Pmode); | |
2331 | modbase = xtensa_tls_module_base (); | |
2332 | insns = xtensa_call_tls_desc (modbase, &ret); | |
2333 | emit_libcall_block (insns, base, ret, modbase); | |
2334 | addend = force_reg (SImode, gen_sym_DTPOFF (x)); | |
2335 | emit_insn (gen_addsi3 (dest, base, addend)); | |
2336 | break; | |
2337 | ||
2338 | case TLS_MODEL_INITIAL_EXEC: | |
2339 | case TLS_MODEL_LOCAL_EXEC: | |
2340 | tp = gen_reg_rtx (SImode); | |
f959607b | 2341 | emit_insn (gen_get_thread_pointersi (tp)); |
6a7a462c BW |
2342 | addend = force_reg (SImode, gen_sym_TPOFF (x)); |
2343 | emit_insn (gen_addsi3 (dest, tp, addend)); | |
2344 | break; | |
2345 | ||
2346 | default: | |
2347 | gcc_unreachable (); | |
2348 | } | |
2349 | ||
2350 | return dest; | |
2351 | } | |
2352 | ||
2353 | ||
da1f39e4 BW |
2354 | rtx |
2355 | xtensa_legitimize_address (rtx x, | |
2356 | rtx oldx ATTRIBUTE_UNUSED, | |
ef4bddc2 | 2357 | machine_mode mode) |
da1f39e4 | 2358 | { |
6a7a462c BW |
2359 | if (xtensa_tls_symbol_p (x)) |
2360 | return xtensa_legitimize_tls_address (x); | |
2361 | ||
da1f39e4 BW |
2362 | if (GET_CODE (x) == PLUS) |
2363 | { | |
2364 | rtx plus0 = XEXP (x, 0); | |
2365 | rtx plus1 = XEXP (x, 1); | |
2366 | ||
2367 | if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) | |
2368 | { | |
2369 | plus0 = XEXP (x, 1); | |
2370 | plus1 = XEXP (x, 0); | |
2371 | } | |
2372 | ||
2373 | /* Try to split up the offset to use an ADDMI instruction. */ | |
2374 | if (GET_CODE (plus0) == REG | |
2375 | && GET_CODE (plus1) == CONST_INT | |
2376 | && !xtensa_mem_offset (INTVAL (plus1), mode) | |
2377 | && !xtensa_simm8 (INTVAL (plus1)) | |
2378 | && xtensa_mem_offset (INTVAL (plus1) & 0xff, mode) | |
2379 | && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) | |
2380 | { | |
2381 | rtx temp = gen_reg_rtx (Pmode); | |
2382 | rtx addmi_offset = GEN_INT (INTVAL (plus1) & ~0xff); | |
f7df4a84 RS |
2383 | emit_insn (gen_rtx_SET (temp, gen_rtx_PLUS (Pmode, plus0, |
2384 | addmi_offset))); | |
da1f39e4 BW |
2385 | return gen_rtx_PLUS (Pmode, temp, GEN_INT (INTVAL (plus1) & 0xff)); |
2386 | } | |
2387 | } | |
2388 | ||
506d7b68 | 2389 | return x; |
da1f39e4 BW |
2390 | } |
2391 | ||
a1a79768 AS |
2392 | /* Worker function for TARGET_MODE_DEPENDENT_ADDRESS_P. |
2393 | ||
2394 | Treat constant-pool references as "mode dependent" since they can | |
2395 | only be accessed with SImode loads. This works around a bug in the | |
2396 | combiner where a constant pool reference is temporarily converted | |
2397 | to an HImode load, which is then assumed to zero-extend based on | |
2398 | our definition of LOAD_EXTEND_OP. This is wrong because the high | |
2399 | bits of a 16-bit value in the constant pool are now sign-extended | |
2400 | by default. */ | |
2401 | ||
2402 | static bool | |
5bfed9a9 GJL |
2403 | xtensa_mode_dependent_address_p (const_rtx addr, |
2404 | addr_space_t as ATTRIBUTE_UNUSED) | |
a1a79768 AS |
2405 | { |
2406 | return constantpool_address_p (addr); | |
2407 | } | |
da1f39e4 | 2408 | |
6a7a462c BW |
2409 | /* Return TRUE if X contains any TLS symbol references. */ |
2410 | ||
2411 | bool | |
2412 | xtensa_tls_referenced_p (rtx x) | |
2413 | { | |
e46dad5d | 2414 | if (! targetm.have_tls) |
6a7a462c BW |
2415 | return false; |
2416 | ||
2f36a994 RS |
2417 | subrtx_iterator::array_type array; |
2418 | FOR_EACH_SUBRTX (iter, array, x, ALL) | |
2419 | { | |
2420 | const_rtx x = *iter; | |
2421 | if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0) | |
2422 | return true; | |
2423 | ||
2424 | /* Ignore TLS references that have already been legitimized. */ | |
2425 | if (GET_CODE (x) == UNSPEC) | |
2426 | switch (XINT (x, 1)) | |
2427 | { | |
2428 | case UNSPEC_TPOFF: | |
2429 | case UNSPEC_DTPOFF: | |
2430 | case UNSPEC_TLS_FUNC: | |
2431 | case UNSPEC_TLS_ARG: | |
2432 | case UNSPEC_TLS_CALL: | |
2433 | iter.skip_subrtxes (); | |
2434 | break; | |
2435 | default: | |
2436 | break; | |
2437 | } | |
2438 | } | |
2439 | return false; | |
6a7a462c BW |
2440 | } |
2441 | ||
2442 | ||
1c68ec1f TJJS |
2443 | /* Helper function for "*shlrd_..." patterns. */ |
2444 | ||
2445 | enum rtx_code | |
2446 | xtensa_shlrd_which_direction (rtx op0, rtx op1) | |
2447 | { | |
2448 | if (GET_CODE (op0) == ASHIFT && GET_CODE (op1) == LSHIFTRT) | |
2449 | return ASHIFT; /* shld */ | |
2450 | if (GET_CODE (op0) == LSHIFTRT && GET_CODE (op1) == ASHIFT) | |
2451 | return LSHIFTRT; /* shrd */ | |
2452 | ||
2453 | return UNKNOWN; | |
2454 | } | |
2455 | ||
2456 | ||
fbbf66e7 RS |
2457 | /* Implement TARGET_CANNOT_FORCE_CONST_MEM. */ |
2458 | ||
2459 | static bool | |
ef4bddc2 | 2460 | xtensa_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
fbbf66e7 RS |
2461 | { |
2462 | return xtensa_tls_referenced_p (x); | |
2463 | } | |
2464 | ||
2465 | ||
b0c6e48f | 2466 | /* Return the debugger register number to use for 'regno'. */ |
03984308 BW |
2467 | |
2468 | int | |
ca60bd93 | 2469 | xtensa_debugger_regno (int regno) |
03984308 BW |
2470 | { |
2471 | int first = -1; | |
633e4eb4 BW |
2472 | |
2473 | if (GP_REG_P (regno)) | |
2474 | { | |
2475 | regno -= GP_REG_FIRST; | |
2476 | first = 0; | |
2477 | } | |
2478 | else if (BR_REG_P (regno)) | |
2479 | { | |
2480 | regno -= BR_REG_FIRST; | |
2481 | first = 16; | |
2482 | } | |
2483 | else if (FP_REG_P (regno)) | |
2484 | { | |
2485 | regno -= FP_REG_FIRST; | |
b0c6e48f | 2486 | first = 48; |
633e4eb4 | 2487 | } |
03984308 BW |
2488 | else if (ACC_REG_P (regno)) |
2489 | { | |
b0c6e48f BW |
2490 | first = 0x200; /* Start of Xtensa special registers. */ |
2491 | regno = 16; /* ACCLO is special register 16. */ | |
03984308 BW |
2492 | } |
2493 | ||
2494 | /* When optimizing, we sometimes get asked about pseudo-registers | |
638db43e | 2495 | that don't represent hard registers. Return 0 for these. */ |
03984308 BW |
2496 | if (first == -1) |
2497 | return 0; | |
2498 | ||
2499 | return first + regno; | |
2500 | } | |
2501 | ||
2502 | ||
2503 | /* Argument support functions. */ | |
2504 | ||
2505 | /* Initialize CUMULATIVE_ARGS for a function. */ | |
2506 | ||
2507 | void | |
997b8b4d | 2508 | init_cumulative_args (CUMULATIVE_ARGS *cum, int incoming) |
03984308 BW |
2509 | { |
2510 | cum->arg_words = 0; | |
997b8b4d | 2511 | cum->incoming = incoming; |
03984308 BW |
2512 | } |
2513 | ||
ffbc8796 | 2514 | |
03984308 BW |
2515 | /* Advance the argument to the next argument position. */ |
2516 | ||
626a4b31 | 2517 | static void |
6930c98c RS |
2518 | xtensa_function_arg_advance (cumulative_args_t cum, |
2519 | const function_arg_info &arg) | |
03984308 BW |
2520 | { |
2521 | int words, max; | |
2522 | int *arg_words; | |
2523 | ||
d5cc9181 | 2524 | arg_words = &get_cumulative_args (cum)->arg_words; |
03984308 BW |
2525 | max = MAX_ARGS_IN_REGISTERS; |
2526 | ||
6930c98c RS |
2527 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2528 | / UNITS_PER_WORD); | |
03984308 | 2529 | |
85d91d5b | 2530 | if (*arg_words < max |
0ffef200 | 2531 | && (targetm.calls.must_pass_in_stack (arg) |
85d91d5b | 2532 | || *arg_words + words > max)) |
03984308 BW |
2533 | *arg_words = max; |
2534 | ||
2535 | *arg_words += words; | |
2536 | } | |
2537 | ||
2538 | ||
6783fdb7 | 2539 | /* Return an RTL expression containing the register for the given argument, |
368ebcd6 | 2540 | or 0 if the argument is to be passed on the stack. INCOMING_P is nonzero |
ffbc8796 | 2541 | if this is an incoming argument to the current function. */ |
03984308 | 2542 | |
626a4b31 | 2543 | static rtx |
6783fdb7 RS |
2544 | xtensa_function_arg_1 (cumulative_args_t cum_v, const function_arg_info &arg, |
2545 | bool incoming_p) | |
03984308 | 2546 | { |
d5cc9181 | 2547 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); |
03984308 BW |
2548 | int regbase, words, max; |
2549 | int *arg_words; | |
2550 | int regno; | |
03984308 BW |
2551 | |
2552 | arg_words = &cum->arg_words; | |
2553 | regbase = (incoming_p ? GP_ARG_FIRST : GP_OUTGOING_ARG_FIRST); | |
2554 | max = MAX_ARGS_IN_REGISTERS; | |
2555 | ||
6783fdb7 RS |
2556 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2557 | / UNITS_PER_WORD); | |
03984308 | 2558 | |
6783fdb7 | 2559 | if (arg.type && (TYPE_ALIGN (arg.type) > BITS_PER_WORD)) |
822e895c | 2560 | { |
6783fdb7 | 2561 | int align = MIN (TYPE_ALIGN (arg.type), STACK_BOUNDARY) / BITS_PER_WORD; |
822e895c BW |
2562 | *arg_words = (*arg_words + align - 1) & -align; |
2563 | } | |
03984308 BW |
2564 | |
2565 | if (*arg_words + words > max) | |
2566 | return (rtx)0; | |
2567 | ||
2568 | regno = regbase + *arg_words; | |
03984308 | 2569 | |
997b8b4d | 2570 | if (cum->incoming && regno <= A7_REG && regno + words > A7_REG) |
590e2636 | 2571 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
03984308 | 2572 | |
6783fdb7 | 2573 | return gen_rtx_REG (arg.mode, regno); |
03984308 BW |
2574 | } |
2575 | ||
626a4b31 NF |
2576 | /* Implement TARGET_FUNCTION_ARG. */ |
2577 | ||
2578 | static rtx | |
6783fdb7 | 2579 | xtensa_function_arg (cumulative_args_t cum, const function_arg_info &arg) |
626a4b31 | 2580 | { |
6783fdb7 | 2581 | return xtensa_function_arg_1 (cum, arg, false); |
626a4b31 NF |
2582 | } |
2583 | ||
2584 | /* Implement TARGET_FUNCTION_INCOMING_ARG. */ | |
2585 | ||
2586 | static rtx | |
6783fdb7 RS |
2587 | xtensa_function_incoming_arg (cumulative_args_t cum, |
2588 | const function_arg_info &arg) | |
626a4b31 | 2589 | { |
6783fdb7 | 2590 | return xtensa_function_arg_1 (cum, arg, true); |
626a4b31 | 2591 | } |
03984308 | 2592 | |
c2ed6cf8 | 2593 | static unsigned int |
ef4bddc2 | 2594 | xtensa_function_arg_boundary (machine_mode mode, const_tree type) |
d2348985 BW |
2595 | { |
2596 | unsigned int alignment; | |
2597 | ||
2598 | alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode); | |
2599 | if (alignment < PARM_BOUNDARY) | |
2600 | alignment = PARM_BOUNDARY; | |
2601 | if (alignment > STACK_BOUNDARY) | |
2602 | alignment = STACK_BOUNDARY; | |
2603 | return alignment; | |
2604 | } | |
2605 | ||
2606 | ||
6e5ff6e7 | 2607 | static bool |
586de218 | 2608 | xtensa_return_in_msb (const_tree valtype) |
6e5ff6e7 BW |
2609 | { |
2610 | return (TARGET_BIG_ENDIAN | |
2611 | && AGGREGATE_TYPE_P (valtype) | |
2612 | && int_size_in_bytes (valtype) >= UNITS_PER_WORD); | |
2613 | } | |
2614 | ||
2615 | ||
c5387660 JM |
2616 | static void |
2617 | xtensa_option_override (void) | |
03984308 BW |
2618 | { |
2619 | int regno; | |
ef4bddc2 | 2620 | machine_mode mode; |
03984308 | 2621 | |
8c8eb949 MF |
2622 | if (xtensa_windowed_abi == -1) |
2623 | xtensa_windowed_abi = TARGET_WINDOWED_ABI_DEFAULT; | |
2624 | ||
e46dad5d MF |
2625 | if (! TARGET_THREADPTR) |
2626 | targetm.have_tls = false; | |
2627 | ||
1a711a0b MF |
2628 | /* Use CONST16 in the absence of L32R. |
2629 | Set it in the TARGET_OPTION_OVERRIDE to avoid dependency on xtensa | |
e53b6e56 | 2630 | configuration in the xtensa-common.cc */ |
1a711a0b MF |
2631 | |
2632 | if (!TARGET_L32R) | |
2633 | target_flags |= MASK_CONST16; | |
2634 | ||
03984308 BW |
2635 | if (!TARGET_BOOLEANS && TARGET_HARD_FLOAT) |
2636 | error ("boolean registers required for the floating-point option"); | |
2637 | ||
638db43e | 2638 | /* Set up array giving whether a given register can hold a given mode. */ |
03984308 BW |
2639 | for (mode = VOIDmode; |
2640 | mode != MAX_MACHINE_MODE; | |
ef4bddc2 | 2641 | mode = (machine_mode) ((int) mode + 1)) |
03984308 BW |
2642 | { |
2643 | int size = GET_MODE_SIZE (mode); | |
0a2aaacc | 2644 | enum mode_class mclass = GET_MODE_CLASS (mode); |
03984308 BW |
2645 | |
2646 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2647 | { | |
2648 | int temp; | |
2649 | ||
2650 | if (ACC_REG_P (regno)) | |
f42f5a1b | 2651 | temp = (TARGET_MAC16 |
0a2aaacc | 2652 | && (mclass == MODE_INT) && (size <= UNITS_PER_WORD)); |
03984308 BW |
2653 | else if (GP_REG_P (regno)) |
2654 | temp = ((regno & 1) == 0 || (size <= UNITS_PER_WORD)); | |
2655 | else if (FP_REG_P (regno)) | |
2656 | temp = (TARGET_HARD_FLOAT && (mode == SFmode)); | |
2657 | else if (BR_REG_P (regno)) | |
2658 | temp = (TARGET_BOOLEANS && (mode == CCmode)); | |
2659 | else | |
2660 | temp = FALSE; | |
2661 | ||
f939c3e6 | 2662 | xtensa_hard_regno_mode_ok_p[(int) mode][regno] = temp; |
03984308 BW |
2663 | } |
2664 | } | |
2665 | ||
2666 | init_machine_status = xtensa_init_machine_status; | |
03984308 | 2667 | |
f42f5a1b BW |
2668 | /* Check PIC settings. PIC is only supported when using L32R |
2669 | instructions, and some targets need to always use PIC. */ | |
2670 | if (flag_pic && TARGET_CONST16) | |
a3f9f006 | 2671 | error ("%<-f%s%> is not supported with CONST16 instructions", |
f42f5a1b | 2672 | (flag_pic > 1 ? "PIC" : "pic")); |
1b408ba1 SA |
2673 | else if (TARGET_FORCE_NO_PIC) |
2674 | flag_pic = 0; | |
f42f5a1b BW |
2675 | else if (XTENSA_ALWAYS_PIC) |
2676 | { | |
2677 | if (TARGET_CONST16) | |
2678 | error ("PIC is required but not supported with CONST16 instructions"); | |
2679 | flag_pic = 1; | |
2680 | } | |
2681 | /* There's no need for -fPIC (as opposed to -fpic) on Xtensa. */ | |
2682 | if (flag_pic > 1) | |
03984308 | 2683 | flag_pic = 1; |
166b25dc BW |
2684 | if (flag_pic && !flag_pie) |
2685 | flag_shlib = 1; | |
87c8b4be CT |
2686 | |
2687 | /* Hot/cold partitioning does not work on this architecture, because of | |
2688 | constant pools (the load instruction cannot necessarily reach that far). | |
2689 | Therefore disable it on this architecture. */ | |
2690 | if (flag_reorder_blocks_and_partition) | |
2691 | { | |
2692 | flag_reorder_blocks_and_partition = 0; | |
2693 | flag_reorder_blocks = 1; | |
2694 | } | |
03984308 BW |
2695 | } |
2696 | ||
c43f4279 RS |
2697 | /* Implement TARGET_HARD_REGNO_NREGS. */ |
2698 | ||
2699 | static unsigned int | |
2700 | xtensa_hard_regno_nregs (unsigned int regno, machine_mode mode) | |
2701 | { | |
2702 | if (FP_REG_P (regno)) | |
2703 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_FPREG); | |
2704 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD); | |
2705 | } | |
2706 | ||
f939c3e6 RS |
2707 | /* Implement TARGET_HARD_REGNO_MODE_OK. */ |
2708 | ||
2709 | static bool | |
2710 | xtensa_hard_regno_mode_ok (unsigned int regno, machine_mode mode) | |
2711 | { | |
2712 | return xtensa_hard_regno_mode_ok_p[mode][regno]; | |
2713 | } | |
2714 | ||
99e1629f RS |
2715 | /* Implement TARGET_MODES_TIEABLE_P. */ |
2716 | ||
2717 | static bool | |
2718 | xtensa_modes_tieable_p (machine_mode mode1, machine_mode mode2) | |
2719 | { | |
2720 | return ((GET_MODE_CLASS (mode1) == MODE_FLOAT | |
2721 | || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) | |
2722 | == (GET_MODE_CLASS (mode2) == MODE_FLOAT | |
2723 | || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); | |
2724 | } | |
2725 | ||
03984308 BW |
2726 | /* A C compound statement to output to stdio stream STREAM the |
2727 | assembler syntax for an instruction operand X. X is an RTL | |
2728 | expression. | |
2729 | ||
2730 | CODE is a value that can be used to specify one of several ways | |
2731 | of printing the operand. It is used when identical operands | |
2732 | must be printed differently depending on the context. CODE | |
2733 | comes from the '%' specification that was used to request | |
2734 | printing of the operand. If the specification was just '%DIGIT' | |
2735 | then CODE is 0; if the specification was '%LTR DIGIT' then CODE | |
2736 | is the ASCII code for LTR. | |
2737 | ||
2738 | If X is a register, this macro should print the register's name. | |
2739 | The names can be found in an array 'reg_names' whose type is | |
2740 | 'char *[]'. 'reg_names' is initialized from 'REGISTER_NAMES'. | |
2741 | ||
2742 | When the machine description has a specification '%PUNCT' (a '%' | |
2743 | followed by a punctuation character), this macro is called with | |
2744 | a null pointer for X and the punctuation character for CODE. | |
2745 | ||
2746 | 'a', 'c', 'l', and 'n' are reserved. | |
633e4eb4 | 2747 | |
03984308 BW |
2748 | The Xtensa specific codes are: |
2749 | ||
2750 | 'd' CONST_INT, print as signed decimal | |
2751 | 'x' CONST_INT, print as signed hexadecimal | |
2752 | 'K' CONST_INT, print number of bits in mask for EXTUI | |
2753 | 'R' CONST_INT, print (X & 0x1f) | |
2754 | 'L' CONST_INT, print ((32 - X) & 0x1f) | |
2755 | 'D' REG, print second register of double-word register operand | |
2756 | 'N' MEM, print address of next word following a memory operand | |
2757 | 'v' MEM, if memory reference is volatile, output a MEMW before it | |
f42f5a1b BW |
2758 | 't' any constant, add "@h" suffix for top 16 bits |
2759 | 'b' any constant, add "@l" suffix for bottom 16 bits | |
03984308 BW |
2760 | */ |
2761 | ||
2762 | static void | |
ffbc8796 | 2763 | printx (FILE *file, signed int val) |
03984308 | 2764 | { |
ffbc8796 | 2765 | /* Print a hexadecimal value in a nice way. */ |
9b251fe2 | 2766 | if (IN_RANGE (val, -9, 9)) |
03984308 BW |
2767 | fprintf (file, "%d", val); |
2768 | else if (val < 0) | |
2769 | fprintf (file, "-0x%x", -val); | |
2770 | else | |
2771 | fprintf (file, "0x%x", val); | |
2772 | } | |
2773 | ||
2774 | ||
2775 | void | |
ffbc8796 | 2776 | print_operand (FILE *file, rtx x, int letter) |
03984308 | 2777 | { |
f42f5a1b | 2778 | if (!x) |
7e5baa7e | 2779 | error ("%<PRINT_OPERAND%> null pointer"); |
03984308 | 2780 | |
f42f5a1b | 2781 | switch (letter) |
03984308 | 2782 | { |
f42f5a1b BW |
2783 | case 'D': |
2784 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) | |
2785 | fprintf (file, "%s", reg_names[xt_true_regnum (x) + 1]); | |
2786 | else | |
2787 | output_operand_lossage ("invalid %%D value"); | |
2788 | break; | |
03984308 | 2789 | |
f42f5a1b BW |
2790 | case 'v': |
2791 | if (GET_CODE (x) == MEM) | |
2792 | { | |
2793 | /* For a volatile memory reference, emit a MEMW before the | |
2794 | load or store. */ | |
66e58b33 | 2795 | if (MEM_VOLATILE_P (x) && TARGET_SERIALIZE_VOLATILE) |
f42f5a1b BW |
2796 | fprintf (file, "memw\n\t"); |
2797 | } | |
2798 | else | |
2799 | output_operand_lossage ("invalid %%v value"); | |
2800 | break; | |
03984308 | 2801 | |
f42f5a1b BW |
2802 | case 'N': |
2803 | if (GET_CODE (x) == MEM | |
2804 | && (GET_MODE (x) == DFmode || GET_MODE (x) == DImode)) | |
2805 | { | |
0d4a1197 RS |
2806 | x = adjust_address (x, GET_MODE (x) == DFmode ? E_SFmode : E_SImode, |
2807 | 4); | |
cc8ca59e | 2808 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b BW |
2809 | } |
2810 | else | |
2811 | output_operand_lossage ("invalid %%N value"); | |
2812 | break; | |
03984308 | 2813 | |
f42f5a1b BW |
2814 | case 'K': |
2815 | if (GET_CODE (x) == CONST_INT) | |
03984308 | 2816 | { |
f42f5a1b | 2817 | unsigned val = INTVAL (x); |
b753405a | 2818 | if (!xtensa_mask_immediate (val)) |
f42f5a1b | 2819 | fatal_insn ("invalid mask", x); |
03984308 | 2820 | |
b753405a | 2821 | fprintf (file, "%d", floor_log2 (val + 1)); |
f42f5a1b BW |
2822 | } |
2823 | else | |
2824 | output_operand_lossage ("invalid %%K value"); | |
2825 | break; | |
03984308 | 2826 | |
f42f5a1b BW |
2827 | case 'L': |
2828 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2829 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, (32 - INTVAL (x)) & 0x1f); |
f42f5a1b BW |
2830 | else |
2831 | output_operand_lossage ("invalid %%L value"); | |
2832 | break; | |
03984308 | 2833 | |
f42f5a1b BW |
2834 | case 'R': |
2835 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2836 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) & 0x1f); |
f42f5a1b BW |
2837 | else |
2838 | output_operand_lossage ("invalid %%R value"); | |
2839 | break; | |
03984308 | 2840 | |
f42f5a1b BW |
2841 | case 'x': |
2842 | if (GET_CODE (x) == CONST_INT) | |
2843 | printx (file, INTVAL (x)); | |
2844 | else | |
2845 | output_operand_lossage ("invalid %%x value"); | |
2846 | break; | |
03984308 | 2847 | |
f42f5a1b BW |
2848 | case 'd': |
2849 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2850 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2851 | else |
2852 | output_operand_lossage ("invalid %%d value"); | |
2853 | break; | |
03984308 | 2854 | |
f42f5a1b BW |
2855 | case 't': |
2856 | case 'b': | |
2857 | if (GET_CODE (x) == CONST_INT) | |
2858 | { | |
2859 | printx (file, INTVAL (x)); | |
2860 | fputs (letter == 't' ? "@h" : "@l", file); | |
2861 | } | |
2862 | else if (GET_CODE (x) == CONST_DOUBLE) | |
2863 | { | |
f42f5a1b BW |
2864 | if (GET_MODE (x) == SFmode) |
2865 | { | |
2866 | long l; | |
34a72c33 | 2867 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
f42f5a1b BW |
2868 | fprintf (file, "0x%08lx@%c", l, letter == 't' ? 'h' : 'l'); |
2869 | } | |
2870 | else | |
2871 | output_operand_lossage ("invalid %%t/%%b value"); | |
2872 | } | |
2873 | else if (GET_CODE (x) == CONST) | |
2874 | { | |
2875 | /* X must be a symbolic constant on ELF. Write an expression | |
2876 | suitable for 'const16' that sets the high or low 16 bits. */ | |
2877 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
2878 | || (GET_CODE (XEXP (XEXP (x, 0), 0)) != SYMBOL_REF | |
2879 | && GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
2880 | || GET_CODE (XEXP (XEXP (x, 0), 1)) != CONST_INT) | |
2881 | output_operand_lossage ("invalid %%t/%%b value"); | |
2882 | print_operand (file, XEXP (XEXP (x, 0), 0), 0); | |
2883 | fputs (letter == 't' ? "@h" : "@l", file); | |
2884 | /* There must be a non-alphanumeric character between 'h' or 'l' | |
2885 | and the number. The '-' is added by print_operand() already. */ | |
2886 | if (INTVAL (XEXP (XEXP (x, 0), 1)) >= 0) | |
2887 | fputs ("+", file); | |
2888 | print_operand (file, XEXP (XEXP (x, 0), 1), 0); | |
2889 | } | |
2890 | else | |
633e4eb4 | 2891 | { |
f42f5a1b BW |
2892 | output_addr_const (file, x); |
2893 | fputs (letter == 't' ? "@h" : "@l", file); | |
03984308 BW |
2894 | } |
2895 | break; | |
2896 | ||
a024f514 MF |
2897 | case 'y': |
2898 | if (GET_CODE (x) == CONST_DOUBLE && | |
2899 | GET_MODE (x) == SFmode) | |
2900 | { | |
a024f514 | 2901 | long l; |
34a72c33 | 2902 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
a024f514 MF |
2903 | fprintf (file, "0x%08lx", l); |
2904 | break; | |
2905 | } | |
2906 | ||
2907 | /* fall through */ | |
2908 | ||
03984308 | 2909 | default: |
f42f5a1b BW |
2910 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) |
2911 | fprintf (file, "%s", reg_names[xt_true_regnum (x)]); | |
2912 | else if (GET_CODE (x) == MEM) | |
cc8ca59e | 2913 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b | 2914 | else if (GET_CODE (x) == CONST_INT) |
3904010d | 2915 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2916 | else |
2917 | output_addr_const (file, x); | |
03984308 BW |
2918 | } |
2919 | } | |
2920 | ||
2921 | ||
2922 | /* A C compound statement to output to stdio stream STREAM the | |
2923 | assembler syntax for an instruction operand that is a memory | |
fb49053f | 2924 | reference whose address is ADDR. ADDR is an RTL expression. */ |
03984308 BW |
2925 | |
2926 | void | |
ffbc8796 | 2927 | print_operand_address (FILE *file, rtx addr) |
03984308 BW |
2928 | { |
2929 | if (!addr) | |
7e5baa7e | 2930 | error ("%<PRINT_OPERAND_ADDRESS%>, null pointer"); |
03984308 BW |
2931 | |
2932 | switch (GET_CODE (addr)) | |
2933 | { | |
2934 | default: | |
2935 | fatal_insn ("invalid address", addr); | |
2936 | break; | |
2937 | ||
2938 | case REG: | |
2939 | fprintf (file, "%s, 0", reg_names [REGNO (addr)]); | |
2940 | break; | |
2941 | ||
2942 | case PLUS: | |
2943 | { | |
2944 | rtx reg = (rtx)0; | |
2945 | rtx offset = (rtx)0; | |
2946 | rtx arg0 = XEXP (addr, 0); | |
2947 | rtx arg1 = XEXP (addr, 1); | |
2948 | ||
2949 | if (GET_CODE (arg0) == REG) | |
2950 | { | |
2951 | reg = arg0; | |
2952 | offset = arg1; | |
2953 | } | |
2954 | else if (GET_CODE (arg1) == REG) | |
2955 | { | |
2956 | reg = arg1; | |
2957 | offset = arg0; | |
2958 | } | |
2959 | else | |
2960 | fatal_insn ("no register in address", addr); | |
2961 | ||
2962 | if (CONSTANT_P (offset)) | |
2963 | { | |
2964 | fprintf (file, "%s, ", reg_names [REGNO (reg)]); | |
2965 | output_addr_const (file, offset); | |
2966 | } | |
2967 | else | |
2968 | fatal_insn ("address offset not a constant", addr); | |
2969 | } | |
2970 | break; | |
2971 | ||
2972 | case LABEL_REF: | |
2973 | case SYMBOL_REF: | |
2974 | case CONST_INT: | |
2975 | case CONST: | |
2976 | output_addr_const (file, addr); | |
2977 | break; | |
2978 | } | |
2979 | } | |
2980 | ||
2ac6bb04 | 2981 | /* Implement TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ |
03984308 | 2982 | |
2ac6bb04 | 2983 | static bool |
da1f39e4 BW |
2984 | xtensa_output_addr_const_extra (FILE *fp, rtx x) |
2985 | { | |
2986 | if (GET_CODE (x) == UNSPEC && XVECLEN (x, 0) == 1) | |
2987 | { | |
2988 | switch (XINT (x, 1)) | |
2989 | { | |
6a7a462c BW |
2990 | case UNSPEC_TPOFF: |
2991 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2992 | fputs ("@TPOFF", fp); | |
2993 | return true; | |
2994 | case UNSPEC_DTPOFF: | |
2995 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2996 | fputs ("@DTPOFF", fp); | |
2997 | return true; | |
da1f39e4 BW |
2998 | case UNSPEC_PLT: |
2999 | if (flag_pic) | |
3000 | { | |
3001 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
3002 | fputs ("@PLT", fp); | |
3003 | return true; | |
3004 | } | |
3005 | break; | |
3006 | default: | |
3007 | break; | |
3008 | } | |
3009 | } | |
3010 | return false; | |
3011 | } | |
3012 | ||
9ae4ef4c MF |
3013 | static void |
3014 | xtensa_output_integer_literal_parts (FILE *file, rtx x, int size) | |
3015 | { | |
3016 | if (size > 4 && !(size & (size - 1))) | |
3017 | { | |
3018 | rtx first, second; | |
3019 | ||
3020 | split_double (x, &first, &second); | |
3021 | xtensa_output_integer_literal_parts (file, first, size / 2); | |
3022 | fputs (", ", file); | |
3023 | xtensa_output_integer_literal_parts (file, second, size / 2); | |
3024 | } | |
3025 | else if (size == 4) | |
3026 | { | |
3027 | output_addr_const (file, x); | |
3028 | } | |
3029 | else | |
3030 | { | |
3031 | gcc_unreachable(); | |
3032 | } | |
3033 | } | |
da1f39e4 | 3034 | |
03984308 | 3035 | void |
ef4bddc2 | 3036 | xtensa_output_literal (FILE *file, rtx x, machine_mode mode, int labelno) |
03984308 BW |
3037 | { |
3038 | long value_long[2]; | |
03984308 BW |
3039 | |
3040 | fprintf (file, "\t.literal .LC%u, ", (unsigned) labelno); | |
3041 | ||
3042 | switch (GET_MODE_CLASS (mode)) | |
3043 | { | |
3044 | case MODE_FLOAT: | |
177b6be0 | 3045 | gcc_assert (GET_CODE (x) == CONST_DOUBLE); |
03984308 | 3046 | |
03984308 BW |
3047 | switch (mode) |
3048 | { | |
4e10a5a7 | 3049 | case E_SFmode: |
34a72c33 RS |
3050 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), |
3051 | value_long[0]); | |
4575a800 BW |
3052 | if (HOST_BITS_PER_LONG > 32) |
3053 | value_long[0] &= 0xffffffff; | |
b216cd4a | 3054 | fprintf (file, "0x%08lx\n", value_long[0]); |
03984308 BW |
3055 | break; |
3056 | ||
4e10a5a7 | 3057 | case E_DFmode: |
34a72c33 RS |
3058 | REAL_VALUE_TO_TARGET_DOUBLE (*CONST_DOUBLE_REAL_VALUE (x), |
3059 | value_long); | |
4575a800 BW |
3060 | if (HOST_BITS_PER_LONG > 32) |
3061 | { | |
3062 | value_long[0] &= 0xffffffff; | |
3063 | value_long[1] &= 0xffffffff; | |
3064 | } | |
b216cd4a ZW |
3065 | fprintf (file, "0x%08lx, 0x%08lx\n", |
3066 | value_long[0], value_long[1]); | |
03984308 BW |
3067 | break; |
3068 | ||
3069 | default: | |
177b6be0 | 3070 | gcc_unreachable (); |
03984308 BW |
3071 | } |
3072 | ||
3073 | break; | |
3074 | ||
3075 | case MODE_INT: | |
3076 | case MODE_PARTIAL_INT: | |
9ae4ef4c MF |
3077 | xtensa_output_integer_literal_parts (file, x, GET_MODE_SIZE (mode)); |
3078 | fputs ("\n", file); | |
03984308 BW |
3079 | break; |
3080 | ||
3081 | default: | |
177b6be0 | 3082 | gcc_unreachable (); |
03984308 BW |
3083 | } |
3084 | } | |
3085 | ||
590e2636 | 3086 | static bool |
06c2756e | 3087 | xtensa_call_save_reg (int regno) |
590e2636 MF |
3088 | { |
3089 | if (TARGET_WINDOWED_ABI) | |
3090 | return false; | |
3091 | ||
3092 | if (regno == A0_REG) | |
3093 | return crtl->profile || !crtl->is_leaf || crtl->calls_eh_return || | |
3094 | df_regs_ever_live_p (regno); | |
3095 | ||
9b251fe2 | 3096 | if (crtl->calls_eh_return && IN_RANGE (regno, 2, 3)) |
590e2636 MF |
3097 | return true; |
3098 | ||
2e3d041b | 3099 | return !call_used_or_fixed_reg_p (regno) && df_regs_ever_live_p (regno); |
590e2636 | 3100 | } |
03984308 BW |
3101 | |
3102 | /* Return the bytes needed to compute the frame pointer from the current | |
638db43e | 3103 | stack pointer. */ |
03984308 BW |
3104 | |
3105 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
3106 | #define XTENSA_STACK_ALIGN(LOC) (((LOC) + STACK_BYTES-1) & ~(STACK_BYTES-1)) | |
3107 | ||
3108 | long | |
f075bd95 | 3109 | compute_frame_size (poly_int64 size) |
03984308 | 3110 | { |
590e2636 MF |
3111 | int regno; |
3112 | ||
ad89d820 MF |
3113 | if (reload_completed && cfun->machine->frame_laid_out) |
3114 | return cfun->machine->current_frame_size; | |
3115 | ||
ffbc8796 | 3116 | /* Add space for the incoming static chain value. */ |
6de9cd9a | 3117 | if (cfun->static_chain_decl != NULL) |
03984308 BW |
3118 | size += (1 * UNITS_PER_WORD); |
3119 | ||
ad89d820 | 3120 | cfun->machine->callee_save_size = 0; |
590e2636 MF |
3121 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) |
3122 | { | |
06c2756e | 3123 | if (xtensa_call_save_reg (regno)) |
ad89d820 | 3124 | cfun->machine->callee_save_size += UNITS_PER_WORD; |
590e2636 MF |
3125 | } |
3126 | ||
ad89d820 | 3127 | cfun->machine->current_frame_size = |
03984308 | 3128 | XTENSA_STACK_ALIGN (size |
ad89d820 | 3129 | + cfun->machine->callee_save_size |
38173d38 | 3130 | + crtl->outgoing_args_size |
03984308 | 3131 | + (WINDOW_SIZE * UNITS_PER_WORD)); |
ad89d820 MF |
3132 | cfun->machine->callee_save_size = |
3133 | XTENSA_STACK_ALIGN (cfun->machine->callee_save_size); | |
3134 | cfun->machine->frame_laid_out = true; | |
3135 | return cfun->machine->current_frame_size; | |
03984308 BW |
3136 | } |
3137 | ||
3138 | ||
b52b1749 | 3139 | bool |
ffbc8796 | 3140 | xtensa_frame_pointer_required (void) |
03984308 BW |
3141 | { |
3142 | /* The code to expand builtin_frame_addr and builtin_return_addr | |
3143 | currently uses the hard_frame_pointer instead of frame_pointer. | |
3144 | This seems wrong but maybe it's necessary for other architectures. | |
638db43e | 3145 | This function is derived from the i386 code. */ |
03984308 | 3146 | |
25403c41 | 3147 | if (cfun->machine->accesses_prev_frame || cfun->has_nonlocal_label) |
b52b1749 | 3148 | return true; |
03984308 | 3149 | |
b52b1749 | 3150 | return false; |
03984308 BW |
3151 | } |
3152 | ||
5057f9e0 | 3153 | HOST_WIDE_INT |
eced9b48 | 3154 | xtensa_initial_elimination_offset (int from, int to ATTRIBUTE_UNUSED) |
5057f9e0 MF |
3155 | { |
3156 | long frame_size = compute_frame_size (get_frame_size ()); | |
3157 | HOST_WIDE_INT offset; | |
3158 | ||
3159 | switch (from) | |
3160 | { | |
3161 | case FRAME_POINTER_REGNUM: | |
3162 | if (FRAME_GROWS_DOWNWARD) | |
3163 | offset = frame_size - (WINDOW_SIZE * UNITS_PER_WORD) | |
3164 | - cfun->machine->callee_save_size; | |
3165 | else | |
3166 | offset = 0; | |
3167 | break; | |
3168 | case ARG_POINTER_REGNUM: | |
3169 | offset = frame_size; | |
3170 | break; | |
3171 | default: | |
3172 | gcc_unreachable (); | |
3173 | } | |
3174 | ||
3175 | return offset; | |
3176 | } | |
03984308 | 3177 | |
06c2756e TJJS |
3178 | #define ADJUST_SP_NONE 0x0 |
3179 | #define ADJUST_SP_NEED_NOTE 0x1 | |
3180 | #define ADJUST_SP_FRAME_PTR 0x2 | |
3181 | static void | |
3182 | xtensa_emit_adjust_stack_ptr (HOST_WIDE_INT offset, int flags) | |
3183 | { | |
3184 | rtx_insn *insn; | |
3185 | rtx ptr = (flags & ADJUST_SP_FRAME_PTR) ? hard_frame_pointer_rtx | |
3186 | : stack_pointer_rtx; | |
3187 | ||
3188 | if (cfun->machine->inhibit_logues_a1_adjusts) | |
3189 | return; | |
3190 | ||
3191 | if (xtensa_simm8 (offset) | |
3192 | || xtensa_simm8x256 (offset)) | |
3193 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, ptr, GEN_INT (offset))); | |
3194 | else | |
3195 | { | |
3196 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
3197 | ||
3198 | if (offset < 0) | |
3199 | { | |
3200 | emit_move_insn (tmp_reg, GEN_INT (-offset)); | |
3201 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, ptr, tmp_reg)); | |
3202 | } | |
3203 | else | |
3204 | { | |
3205 | emit_move_insn (tmp_reg, GEN_INT (offset)); | |
3206 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, ptr, tmp_reg)); | |
3207 | } | |
3208 | } | |
3209 | ||
3210 | if (flags & ADJUST_SP_NEED_NOTE) | |
3211 | { | |
3212 | rtx note_rtx = gen_rtx_SET (stack_pointer_rtx, | |
3213 | plus_constant (Pmode, stack_pointer_rtx, | |
3214 | offset)); | |
3215 | ||
3216 | RTX_FRAME_RELATED_P (insn) = 1; | |
3217 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3218 | } | |
3219 | } | |
3220 | ||
7f0ee694 BW |
3221 | /* minimum frame = reg save area (4 words) plus static chain (1 word) |
3222 | and the total number of words must be a multiple of 128 bits. */ | |
3223 | #define MIN_FRAME_SIZE (8 * UNITS_PER_WORD) | |
3224 | ||
f42f5a1b | 3225 | void |
ffbc8796 | 3226 | xtensa_expand_prologue (void) |
f42f5a1b BW |
3227 | { |
3228 | HOST_WIDE_INT total_size; | |
590e2636 | 3229 | rtx_insn *insn = NULL; |
240a513f | 3230 | rtx note_rtx; |
18dbd950 | 3231 | |
f42f5a1b | 3232 | total_size = compute_frame_size (get_frame_size ()); |
18dbd950 | 3233 | |
7695d1e3 MF |
3234 | if (flag_stack_usage_info) |
3235 | current_function_static_stack_size = total_size; | |
3236 | ||
590e2636 MF |
3237 | if (TARGET_WINDOWED_ABI) |
3238 | { | |
3239 | if (total_size < (1 << (12+3))) | |
3240 | insn = emit_insn (gen_entry (GEN_INT (total_size))); | |
3241 | else | |
3242 | { | |
3243 | /* Use a8 as a temporary since a0-a7 may be live. */ | |
3244 | rtx tmp_reg = gen_rtx_REG (Pmode, A8_REG); | |
3245 | emit_insn (gen_entry (GEN_INT (MIN_FRAME_SIZE))); | |
3246 | emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE)); | |
3247 | emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg)); | |
3248 | insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg)); | |
3249 | } | |
3250 | } | |
03984308 BW |
3251 | else |
3252 | { | |
590e2636 MF |
3253 | int regno; |
3254 | HOST_WIDE_INT offset = 0; | |
ad89d820 | 3255 | int callee_save_size = cfun->machine->callee_save_size; |
06c2756e TJJS |
3256 | df_ref ref; |
3257 | bool stack_pointer_needed = frame_pointer_needed | |
3258 | || crtl->calls_eh_return; | |
3259 | ||
3260 | /* Check if the function body really needs the stack pointer. */ | |
3261 | if (!stack_pointer_needed) | |
3262 | for (ref = DF_REG_USE_CHAIN (A1_REG); | |
3263 | ref; ref = DF_REF_NEXT_REG (ref)) | |
3264 | if (DF_REF_CLASS (ref) == DF_REF_REGULAR | |
3265 | && NONJUMP_INSN_P (DF_REF_INSN (ref))) | |
3266 | stack_pointer_needed = true; | |
3267 | /* Check if callee-saved registers really need saving to the stack. */ | |
3268 | if (!stack_pointer_needed) | |
3269 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
3270 | if (xtensa_call_save_reg (regno)) | |
3271 | stack_pointer_needed = true; | |
3272 | ||
3273 | cfun->machine->inhibit_logues_a1_adjusts = !stack_pointer_needed; | |
590e2636 MF |
3274 | |
3275 | /* -128 is a limit of single addi instruction. */ | |
9b251fe2 | 3276 | if (IN_RANGE (total_size, 1, 128)) |
590e2636 | 3277 | { |
06c2756e TJJS |
3278 | xtensa_emit_adjust_stack_ptr (-total_size, |
3279 | ADJUST_SP_NEED_NOTE); | |
590e2636 MF |
3280 | offset = total_size - UNITS_PER_WORD; |
3281 | } | |
ad89d820 | 3282 | else if (callee_save_size) |
590e2636 MF |
3283 | { |
3284 | /* 1020 is maximal s32i offset, if the frame is bigger than that | |
3285 | * we move sp to the end of callee-saved save area, save and then | |
3286 | * move it to its final location. */ | |
3287 | if (total_size > 1024) | |
3288 | { | |
06c2756e TJJS |
3289 | xtensa_emit_adjust_stack_ptr (-callee_save_size, |
3290 | ADJUST_SP_NEED_NOTE); | |
ad89d820 | 3291 | offset = callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
3292 | } |
3293 | else | |
3294 | { | |
06c2756e TJJS |
3295 | xtensa_emit_adjust_stack_ptr (-total_size, |
3296 | ADJUST_SP_NEED_NOTE); | |
590e2636 MF |
3297 | offset = total_size - UNITS_PER_WORD; |
3298 | } | |
3299 | } | |
3300 | ||
3301 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
3302 | { | |
3303 | if (xtensa_call_save_reg(regno)) | |
3304 | { | |
3305 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
3306 | rtx mem = gen_frame_mem (SImode, x); | |
3307 | rtx reg = gen_rtx_REG (SImode, regno); | |
3308 | ||
3309 | offset -= UNITS_PER_WORD; | |
3310 | insn = emit_move_insn (mem, reg); | |
3311 | RTX_FRAME_RELATED_P (insn) = 1; | |
3312 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, | |
f7df4a84 | 3313 | gen_rtx_SET (mem, reg)); |
590e2636 MF |
3314 | } |
3315 | } | |
1fe39f19 MF |
3316 | if (total_size > 1024 |
3317 | || (!callee_save_size && total_size > 128)) | |
06c2756e TJJS |
3318 | xtensa_emit_adjust_stack_ptr (callee_save_size - total_size, |
3319 | ADJUST_SP_NEED_NOTE); | |
03984308 BW |
3320 | } |
3321 | ||
f42f5a1b | 3322 | if (frame_pointer_needed) |
03984308 | 3323 | { |
997b8b4d | 3324 | if (cfun->machine->set_frame_ptr_insn) |
03984308 | 3325 | { |
240a513f | 3326 | rtx_insn *first; |
03984308 | 3327 | |
997b8b4d BW |
3328 | push_topmost_sequence (); |
3329 | first = get_insns (); | |
3330 | pop_topmost_sequence (); | |
03984308 | 3331 | |
f42f5a1b BW |
3332 | /* For all instructions prior to set_frame_ptr_insn, replace |
3333 | hard_frame_pointer references with stack_pointer. */ | |
3334 | for (insn = first; | |
997b8b4d | 3335 | insn != cfun->machine->set_frame_ptr_insn; |
f42f5a1b BW |
3336 | insn = NEXT_INSN (insn)) |
3337 | { | |
3338 | if (INSN_P (insn)) | |
20dca97b BW |
3339 | { |
3340 | PATTERN (insn) = replace_rtx (copy_rtx (PATTERN (insn)), | |
3341 | hard_frame_pointer_rtx, | |
3342 | stack_pointer_rtx); | |
3343 | df_insn_rescan (insn); | |
3344 | } | |
f42f5a1b BW |
3345 | } |
3346 | } | |
3347 | else | |
590e2636 MF |
3348 | { |
3349 | insn = emit_insn (gen_movsi (hard_frame_pointer_rtx, | |
3350 | stack_pointer_rtx)); | |
3351 | if (!TARGET_WINDOWED_ABI) | |
3352 | { | |
f7df4a84 | 3353 | note_rtx = gen_rtx_SET (hard_frame_pointer_rtx, |
590e2636 MF |
3354 | stack_pointer_rtx); |
3355 | RTX_FRAME_RELATED_P (insn) = 1; | |
3356 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3357 | } | |
3358 | } | |
3359 | } | |
03984308 | 3360 | |
590e2636 MF |
3361 | if (TARGET_WINDOWED_ABI) |
3362 | { | |
3363 | /* Create a note to describe the CFA. Because this is only used to set | |
3364 | DW_AT_frame_base for debug info, don't bother tracking changes through | |
3365 | each instruction in the prologue. It just takes up space. */ | |
f7df4a84 RS |
3366 | note_rtx = gen_rtx_SET ((frame_pointer_needed |
3367 | ? hard_frame_pointer_rtx | |
3368 | : stack_pointer_rtx), | |
590e2636 MF |
3369 | plus_constant (Pmode, stack_pointer_rtx, |
3370 | -total_size)); | |
3371 | RTX_FRAME_RELATED_P (insn) = 1; | |
3372 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3373 | } | |
3374 | } | |
03984308 BW |
3375 | |
3376 | void | |
43b0c56f | 3377 | xtensa_expand_epilogue (bool sibcall_p) |
03984308 | 3378 | { |
590e2636 MF |
3379 | if (!TARGET_WINDOWED_ABI) |
3380 | { | |
3381 | int regno; | |
3382 | HOST_WIDE_INT offset; | |
3383 | ||
ad89d820 | 3384 | if (cfun->machine->current_frame_size > (frame_pointer_needed ? 127 : 1024)) |
590e2636 | 3385 | { |
06c2756e TJJS |
3386 | xtensa_emit_adjust_stack_ptr (cfun->machine->current_frame_size - |
3387 | cfun->machine->callee_save_size, | |
3388 | frame_pointer_needed | |
3389 | ? ADJUST_SP_FRAME_PTR | |
3390 | : ADJUST_SP_NONE); | |
ad89d820 | 3391 | offset = cfun->machine->callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
3392 | } |
3393 | else | |
3394 | { | |
3395 | if (frame_pointer_needed) | |
3396 | emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx); | |
ad89d820 | 3397 | offset = cfun->machine->current_frame_size - UNITS_PER_WORD; |
590e2636 MF |
3398 | } |
3399 | ||
3400 | /* Prevent reordering of saved a0 update and loading it back from | |
3401 | the save area. */ | |
3402 | if (crtl->calls_eh_return) | |
3403 | emit_insn (gen_blockage ()); | |
3404 | ||
3405 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
3406 | { | |
3407 | if (xtensa_call_save_reg(regno)) | |
3408 | { | |
3409 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
43b0c56f | 3410 | rtx reg; |
590e2636 MF |
3411 | |
3412 | offset -= UNITS_PER_WORD; | |
43b0c56f | 3413 | emit_move_insn (reg = gen_rtx_REG (SImode, regno), |
590e2636 | 3414 | gen_frame_mem (SImode, x)); |
43b0c56f TJJS |
3415 | if (regno == A0_REG && sibcall_p) |
3416 | emit_use (reg); | |
590e2636 MF |
3417 | } |
3418 | } | |
3419 | ||
ad89d820 | 3420 | if (cfun->machine->current_frame_size > 0) |
590e2636 MF |
3421 | { |
3422 | if (frame_pointer_needed || /* always reachable with addi */ | |
ad89d820 MF |
3423 | cfun->machine->current_frame_size > 1024 || |
3424 | cfun->machine->current_frame_size <= 127) | |
590e2636 | 3425 | { |
ad89d820 MF |
3426 | if (cfun->machine->current_frame_size <= 127) |
3427 | offset = cfun->machine->current_frame_size; | |
590e2636 | 3428 | else |
ad89d820 | 3429 | offset = cfun->machine->callee_save_size; |
dca74793 | 3430 | if (offset) |
06c2756e | 3431 | xtensa_emit_adjust_stack_ptr (offset, ADJUST_SP_NONE); |
590e2636 MF |
3432 | } |
3433 | else | |
06c2756e TJJS |
3434 | xtensa_emit_adjust_stack_ptr (cfun->machine->current_frame_size, |
3435 | ADJUST_SP_NONE); | |
590e2636 MF |
3436 | } |
3437 | ||
3438 | if (crtl->calls_eh_return) | |
3439 | emit_insn (gen_add3_insn (stack_pointer_rtx, | |
3440 | stack_pointer_rtx, | |
3441 | EH_RETURN_STACKADJ_RTX)); | |
3442 | } | |
ad89d820 | 3443 | cfun->machine->epilogue_done = true; |
43b0c56f TJJS |
3444 | if (!sibcall_p) |
3445 | emit_jump_insn (gen_return ()); | |
03984308 BW |
3446 | } |
3447 | ||
ad89d820 MF |
3448 | bool |
3449 | xtensa_use_return_instruction_p (void) | |
3450 | { | |
3451 | if (!reload_completed) | |
3452 | return false; | |
3453 | if (TARGET_WINDOWED_ABI) | |
3454 | return true; | |
3455 | if (compute_frame_size (get_frame_size ()) == 0) | |
3456 | return true; | |
3457 | return cfun->machine->epilogue_done; | |
3458 | } | |
3459 | ||
590e2636 MF |
3460 | void |
3461 | xtensa_set_return_address (rtx address, rtx scratch) | |
3462 | { | |
3463 | HOST_WIDE_INT total_size = compute_frame_size (get_frame_size ()); | |
3464 | rtx frame = frame_pointer_needed ? | |
3465 | hard_frame_pointer_rtx : stack_pointer_rtx; | |
3466 | rtx a0_addr = plus_constant (Pmode, frame, | |
3467 | total_size - UNITS_PER_WORD); | |
f7df4a84 | 3468 | rtx note = gen_rtx_SET (gen_frame_mem (SImode, a0_addr), |
590e2636 MF |
3469 | gen_rtx_REG (SImode, A0_REG)); |
3470 | rtx insn; | |
3471 | ||
3472 | if (total_size > 1024) { | |
3473 | emit_move_insn (scratch, GEN_INT (total_size - UNITS_PER_WORD)); | |
3474 | emit_insn (gen_addsi3 (scratch, frame, scratch)); | |
3475 | a0_addr = scratch; | |
3476 | } | |
3477 | ||
3478 | insn = emit_move_insn (gen_frame_mem (SImode, a0_addr), address); | |
3479 | RTX_FRAME_RELATED_P (insn) = 1; | |
3480 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note); | |
3481 | } | |
03984308 | 3482 | |
0c14a54d | 3483 | rtx |
ffbc8796 | 3484 | xtensa_return_addr (int count, rtx frame) |
0c14a54d | 3485 | { |
7f0ee694 | 3486 | rtx result, retaddr, curaddr, label; |
0c14a54d | 3487 | |
590e2636 MF |
3488 | if (!TARGET_WINDOWED_ABI) |
3489 | { | |
3490 | if (count != 0) | |
3491 | return const0_rtx; | |
3492 | ||
3493 | return get_hard_reg_initial_val (Pmode, A0_REG); | |
3494 | } | |
3495 | ||
0c14a54d | 3496 | if (count == -1) |
f42f5a1b | 3497 | retaddr = gen_rtx_REG (Pmode, A0_REG); |
0c14a54d BW |
3498 | else |
3499 | { | |
0a81f074 | 3500 | rtx addr = plus_constant (Pmode, frame, -4 * UNITS_PER_WORD); |
0c14a54d BW |
3501 | addr = memory_address (Pmode, addr); |
3502 | retaddr = gen_reg_rtx (Pmode); | |
3503 | emit_move_insn (retaddr, gen_rtx_MEM (Pmode, addr)); | |
3504 | } | |
3505 | ||
3506 | /* The 2 most-significant bits of the return address on Xtensa hold | |
3507 | the register window size. To get the real return address, these | |
7f0ee694 BW |
3508 | bits must be replaced with the high bits from some address in the |
3509 | code. */ | |
3510 | ||
3511 | /* Get the 2 high bits of a local label in the code. */ | |
3512 | curaddr = gen_reg_rtx (Pmode); | |
3513 | label = gen_label_rtx (); | |
3514 | emit_label (label); | |
3515 | LABEL_PRESERVE_P (label) = 1; | |
3516 | emit_move_insn (curaddr, gen_rtx_LABEL_REF (Pmode, label)); | |
3517 | emit_insn (gen_lshrsi3 (curaddr, curaddr, GEN_INT (30))); | |
3518 | emit_insn (gen_ashlsi3 (curaddr, curaddr, GEN_INT (30))); | |
3519 | ||
3520 | /* Clear the 2 high bits of the return address. */ | |
0c14a54d | 3521 | result = gen_reg_rtx (Pmode); |
7f0ee694 BW |
3522 | emit_insn (gen_ashlsi3 (result, retaddr, GEN_INT (2))); |
3523 | emit_insn (gen_lshrsi3 (result, result, GEN_INT (2))); | |
3524 | ||
3525 | /* Combine them to get the result. */ | |
3526 | emit_insn (gen_iorsi3 (result, result, curaddr)); | |
0c14a54d BW |
3527 | return result; |
3528 | } | |
3529 | ||
d9886a9e L |
3530 | /* Disable the use of word-sized or smaller complex modes for structures, |
3531 | and for function arguments in particular, where they cause problems with | |
3532 | register a7. The xtensa_copy_incoming_a7 function assumes that there is | |
3533 | a single reference to an argument in a7, but with small complex modes the | |
3534 | real and imaginary components may be extracted separately, leading to two | |
3535 | uses of the register, only one of which would be replaced. */ | |
3536 | ||
3537 | static bool | |
ef4bddc2 | 3538 | xtensa_member_type_forces_blk (const_tree, machine_mode mode) |
d9886a9e L |
3539 | { |
3540 | return mode == CQImode || mode == CHImode; | |
3541 | } | |
0c14a54d | 3542 | |
03984308 | 3543 | /* Create the va_list data type. |
822e895c BW |
3544 | |
3545 | This structure is set up by __builtin_saveregs. The __va_reg field | |
3546 | points to a stack-allocated region holding the contents of the | |
3547 | incoming argument registers. The __va_ndx field is an index | |
3548 | initialized to the position of the first unnamed (variable) | |
3549 | argument. This same index is also used to address the arguments | |
3550 | passed in memory. Thus, the __va_stk field is initialized to point | |
3551 | to the position of the first argument in memory offset to account | |
3552 | for the arguments passed in registers and to account for the size | |
3553 | of the argument registers not being 16-byte aligned. E.G., there | |
3554 | are 6 argument registers of 4 bytes each, but we want the __va_ndx | |
3555 | for the first stack argument to have the maximal alignment of 16 | |
3556 | bytes, so we offset the __va_stk address by 32 bytes so that | |
3557 | __va_stk[32] references the first argument on the stack. */ | |
03984308 | 3558 | |
c35d187f RH |
3559 | static tree |
3560 | xtensa_build_builtin_va_list (void) | |
03984308 | 3561 | { |
540eaea8 | 3562 | tree f_stk, f_reg, f_ndx, record, type_decl; |
03984308 | 3563 | |
540eaea8 | 3564 | record = (*lang_hooks.types.make_type) (RECORD_TYPE); |
4c4bde29 AH |
3565 | type_decl = build_decl (BUILTINS_LOCATION, |
3566 | TYPE_DECL, get_identifier ("__va_list_tag"), record); | |
03984308 | 3567 | |
4c4bde29 AH |
3568 | f_stk = build_decl (BUILTINS_LOCATION, |
3569 | FIELD_DECL, get_identifier ("__va_stk"), | |
03984308 | 3570 | ptr_type_node); |
4c4bde29 AH |
3571 | f_reg = build_decl (BUILTINS_LOCATION, |
3572 | FIELD_DECL, get_identifier ("__va_reg"), | |
03984308 | 3573 | ptr_type_node); |
4c4bde29 AH |
3574 | f_ndx = build_decl (BUILTINS_LOCATION, |
3575 | FIELD_DECL, get_identifier ("__va_ndx"), | |
03984308 BW |
3576 | integer_type_node); |
3577 | ||
3578 | DECL_FIELD_CONTEXT (f_stk) = record; | |
3579 | DECL_FIELD_CONTEXT (f_reg) = record; | |
3580 | DECL_FIELD_CONTEXT (f_ndx) = record; | |
3581 | ||
0fd2eac2 | 3582 | TYPE_STUB_DECL (record) = type_decl; |
540eaea8 | 3583 | TYPE_NAME (record) = type_decl; |
03984308 | 3584 | TYPE_FIELDS (record) = f_stk; |
910ad8de NF |
3585 | DECL_CHAIN (f_stk) = f_reg; |
3586 | DECL_CHAIN (f_reg) = f_ndx; | |
03984308 BW |
3587 | |
3588 | layout_type (record); | |
3589 | return record; | |
3590 | } | |
3591 | ||
3592 | ||
3593 | /* Save the incoming argument registers on the stack. Returns the | |
638db43e | 3594 | address of the saved registers. */ |
03984308 | 3595 | |
4c45af42 | 3596 | static rtx |
ffbc8796 | 3597 | xtensa_builtin_saveregs (void) |
03984308 | 3598 | { |
e70312d4 | 3599 | rtx gp_regs; |
38173d38 | 3600 | int arg_words = crtl->args.info.arg_words; |
03984308 | 3601 | int gp_left = MAX_ARGS_IN_REGISTERS - arg_words; |
03984308 | 3602 | |
997b8b4d | 3603 | if (gp_left <= 0) |
03984308 BW |
3604 | return const0_rtx; |
3605 | ||
3bbc2af6 | 3606 | /* Allocate the general-purpose register space. */ |
03984308 BW |
3607 | gp_regs = assign_stack_local |
3608 | (BLKmode, MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD, -1); | |
540eaea8 | 3609 | set_mem_alias_set (gp_regs, get_varargs_alias_set ()); |
03984308 BW |
3610 | |
3611 | /* Now store the incoming registers. */ | |
590e2636 | 3612 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
997b8b4d | 3613 | cfun->machine->vararg_a7 = true; |
e70312d4 BW |
3614 | move_block_from_reg (GP_ARG_FIRST + arg_words, |
3615 | adjust_address (gp_regs, BLKmode, | |
3616 | arg_words * UNITS_PER_WORD), | |
3617 | gp_left); | |
590e2636 MF |
3618 | if (cfun->machine->vararg_a7_copy != 0) |
3619 | emit_insn_before (cfun->machine->vararg_a7_copy, get_insns ()); | |
03984308 BW |
3620 | |
3621 | return XEXP (gp_regs, 0); | |
3622 | } | |
3623 | ||
3624 | ||
3625 | /* Implement `va_start' for varargs and stdarg. We look at the | |
638db43e | 3626 | current function to fill in an initial va_list. */ |
03984308 | 3627 | |
d7bd8aeb | 3628 | static void |
ffbc8796 | 3629 | xtensa_va_start (tree valist, rtx nextarg ATTRIBUTE_UNUSED) |
03984308 BW |
3630 | { |
3631 | tree f_stk, stk; | |
3632 | tree f_reg, reg; | |
3633 | tree f_ndx, ndx; | |
3634 | tree t, u; | |
3635 | int arg_words; | |
3636 | ||
38173d38 | 3637 | arg_words = crtl->args.info.arg_words; |
03984308 BW |
3638 | |
3639 | f_stk = TYPE_FIELDS (va_list_type_node); | |
910ad8de NF |
3640 | f_reg = DECL_CHAIN (f_stk); |
3641 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3642 | |
47a25a46 | 3643 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, f_stk, NULL_TREE); |
fa1615d7 BW |
3644 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), |
3645 | f_reg, NULL_TREE); | |
3646 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3647 | f_ndx, NULL_TREE); | |
03984308 BW |
3648 | |
3649 | /* Call __builtin_saveregs; save the result in __va_reg */ | |
e70312d4 BW |
3650 | u = make_tree (sizetype, expand_builtin_saveregs ()); |
3651 | u = fold_convert (ptr_type_node, u); | |
726a989a | 3652 | t = build2 (MODIFY_EXPR, ptr_type_node, reg, u); |
03984308 BW |
3653 | TREE_SIDE_EFFECTS (t) = 1; |
3654 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3655 | ||
822e895c | 3656 | /* Set the __va_stk member to ($arg_ptr - 32). */ |
03984308 | 3657 | u = make_tree (ptr_type_node, virtual_incoming_args_rtx); |
5d49b6a7 | 3658 | u = fold_build_pointer_plus_hwi (u, -32); |
726a989a | 3659 | t = build2 (MODIFY_EXPR, ptr_type_node, stk, u); |
03984308 BW |
3660 | TREE_SIDE_EFFECTS (t) = 1; |
3661 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3662 | ||
822e895c BW |
3663 | /* Set the __va_ndx member. If the first variable argument is on |
3664 | the stack, adjust __va_ndx by 2 words to account for the extra | |
3665 | alignment offset for __va_stk. */ | |
3666 | if (arg_words >= MAX_ARGS_IN_REGISTERS) | |
3667 | arg_words += 2; | |
726a989a | 3668 | t = build2 (MODIFY_EXPR, integer_type_node, ndx, |
f4d3e7fd | 3669 | build_int_cst (integer_type_node, arg_words * UNITS_PER_WORD)); |
03984308 BW |
3670 | TREE_SIDE_EFFECTS (t) = 1; |
3671 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3672 | } | |
3673 | ||
3674 | ||
3675 | /* Implement `va_arg'. */ | |
3676 | ||
85d53c1d | 3677 | static tree |
726a989a RB |
3678 | xtensa_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
3679 | gimple_seq *post_p ATTRIBUTE_UNUSED) | |
03984308 BW |
3680 | { |
3681 | tree f_stk, stk; | |
3682 | tree f_reg, reg; | |
3683 | tree f_ndx, ndx; | |
85d53c1d RH |
3684 | tree type_size, array, orig_ndx, addr, size, va_size, t; |
3685 | tree lab_false, lab_over, lab_false2; | |
08b0dc1b RH |
3686 | bool indirect; |
3687 | ||
fde65a89 | 3688 | indirect = pass_va_arg_by_reference (type); |
08b0dc1b RH |
3689 | if (indirect) |
3690 | type = build_pointer_type (type); | |
03984308 | 3691 | |
3712281f BW |
3692 | /* Handle complex values as separate real and imaginary parts. */ |
3693 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
3694 | { | |
85d53c1d | 3695 | tree real_part, imag_part; |
3712281f | 3696 | |
85d53c1d RH |
3697 | real_part = xtensa_gimplify_va_arg_expr (valist, TREE_TYPE (type), |
3698 | pre_p, NULL); | |
3699 | real_part = get_initialized_tmp_var (real_part, pre_p, NULL); | |
3712281f | 3700 | |
fa1615d7 BW |
3701 | imag_part = xtensa_gimplify_va_arg_expr (unshare_expr (valist), |
3702 | TREE_TYPE (type), | |
85d53c1d RH |
3703 | pre_p, NULL); |
3704 | imag_part = get_initialized_tmp_var (imag_part, pre_p, NULL); | |
3712281f | 3705 | |
47a25a46 | 3706 | return build2 (COMPLEX_EXPR, type, real_part, imag_part); |
3712281f BW |
3707 | } |
3708 | ||
03984308 | 3709 | f_stk = TYPE_FIELDS (va_list_type_node); |
910ad8de NF |
3710 | f_reg = DECL_CHAIN (f_stk); |
3711 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3712 | |
fa1615d7 BW |
3713 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, |
3714 | f_stk, NULL_TREE); | |
3715 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), | |
3716 | f_reg, NULL_TREE); | |
3717 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3718 | f_ndx, NULL_TREE); | |
03984308 | 3719 | |
85d53c1d RH |
3720 | type_size = size_in_bytes (type); |
3721 | va_size = round_up (type_size, UNITS_PER_WORD); | |
3722 | gimplify_expr (&va_size, pre_p, NULL, is_gimple_val, fb_rvalue); | |
8be56275 | 3723 | |
03984308 | 3724 | |
822e895c | 3725 | /* First align __va_ndx if necessary for this arg: |
03984308 | 3726 | |
85d53c1d | 3727 | orig_ndx = (AP).__va_ndx; |
822e895c | 3728 | if (__alignof__ (TYPE) > 4 ) |
85d53c1d | 3729 | orig_ndx = ((orig_ndx + __alignof__ (TYPE) - 1) |
822e895c | 3730 | & -__alignof__ (TYPE)); */ |
03984308 | 3731 | |
85d53c1d RH |
3732 | orig_ndx = get_initialized_tmp_var (ndx, pre_p, NULL); |
3733 | ||
03984308 BW |
3734 | if (TYPE_ALIGN (type) > BITS_PER_WORD) |
3735 | { | |
d2348985 | 3736 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_UNIT; |
85d53c1d | 3737 | |
fa1615d7 | 3738 | t = build2 (PLUS_EXPR, integer_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3739 | build_int_cst (integer_type_node, align - 1)); |
3740 | t = build2 (BIT_AND_EXPR, integer_type_node, t, | |
3741 | build_int_cst (integer_type_node, -align)); | |
fa1615d7 | 3742 | gimplify_assign (unshare_expr (orig_ndx), t, pre_p); |
03984308 BW |
3743 | } |
3744 | ||
3745 | ||
3746 | /* Increment __va_ndx to point past the argument: | |
3747 | ||
85d53c1d | 3748 | (AP).__va_ndx = orig_ndx + __va_size (TYPE); */ |
03984308 | 3749 | |
85d53c1d | 3750 | t = fold_convert (integer_type_node, va_size); |
47a25a46 | 3751 | t = build2 (PLUS_EXPR, integer_type_node, orig_ndx, t); |
fa1615d7 | 3752 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 BW |
3753 | |
3754 | ||
3755 | /* Check if the argument is in registers: | |
3756 | ||
bcf88f9b | 3757 | if ((AP).__va_ndx <= __MAX_ARGS_IN_REGISTERS * 4 |
fe984136 | 3758 | && !must_pass_in_stack (type)) |
ffbc8796 | 3759 | __array = (AP).__va_reg; */ |
03984308 | 3760 | |
9b489f31 | 3761 | array = create_tmp_var (ptr_type_node); |
03984308 | 3762 | |
85d53c1d | 3763 | lab_over = NULL; |
4f53599c | 3764 | if (!must_pass_va_arg_in_stack (type)) |
bcf88f9b | 3765 | { |
4c4bde29 AH |
3766 | lab_false = create_artificial_label (UNKNOWN_LOCATION); |
3767 | lab_over = create_artificial_label (UNKNOWN_LOCATION); | |
85d53c1d | 3768 | |
fa1615d7 | 3769 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (ndx), |
f4d3e7fd BW |
3770 | build_int_cst (integer_type_node, |
3771 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3772 | t = build3 (COND_EXPR, void_type_node, t, |
3773 | build1 (GOTO_EXPR, void_type_node, lab_false), | |
3774 | NULL_TREE); | |
85d53c1d RH |
3775 | gimplify_and_add (t, pre_p); |
3776 | ||
fa1615d7 | 3777 | gimplify_assign (unshare_expr (array), reg, pre_p); |
85d53c1d | 3778 | |
47a25a46 | 3779 | t = build1 (GOTO_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3780 | gimplify_and_add (t, pre_p); |
3781 | ||
47a25a46 | 3782 | t = build1 (LABEL_EXPR, void_type_node, lab_false); |
85d53c1d | 3783 | gimplify_and_add (t, pre_p); |
bcf88f9b | 3784 | } |
03984308 | 3785 | |
85d53c1d | 3786 | |
03984308 BW |
3787 | /* ...otherwise, the argument is on the stack (never split between |
3788 | registers and the stack -- change __va_ndx if necessary): | |
3789 | ||
3790 | else | |
3791 | { | |
822e895c BW |
3792 | if (orig_ndx <= __MAX_ARGS_IN_REGISTERS * 4) |
3793 | (AP).__va_ndx = 32 + __va_size (TYPE); | |
03984308 | 3794 | __array = (AP).__va_stk; |
ffbc8796 | 3795 | } */ |
03984308 | 3796 | |
4c4bde29 | 3797 | lab_false2 = create_artificial_label (UNKNOWN_LOCATION); |
03984308 | 3798 | |
fa1615d7 | 3799 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3800 | build_int_cst (integer_type_node, |
3801 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3802 | t = build3 (COND_EXPR, void_type_node, t, |
3803 | build1 (GOTO_EXPR, void_type_node, lab_false2), | |
3804 | NULL_TREE); | |
85d53c1d | 3805 | gimplify_and_add (t, pre_p); |
03984308 | 3806 | |
fa1615d7 | 3807 | t = size_binop (PLUS_EXPR, unshare_expr (va_size), size_int (32)); |
85d53c1d | 3808 | t = fold_convert (integer_type_node, t); |
fa1615d7 | 3809 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 | 3810 | |
47a25a46 | 3811 | t = build1 (LABEL_EXPR, void_type_node, lab_false2); |
85d53c1d | 3812 | gimplify_and_add (t, pre_p); |
03984308 | 3813 | |
726a989a | 3814 | gimplify_assign (array, stk, pre_p); |
85d53c1d RH |
3815 | |
3816 | if (lab_over) | |
3817 | { | |
47a25a46 | 3818 | t = build1 (LABEL_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3819 | gimplify_and_add (t, pre_p); |
3820 | } | |
8be56275 | 3821 | |
03984308 BW |
3822 | |
3823 | /* Given the base array pointer (__array) and index to the subsequent | |
3824 | argument (__va_ndx), find the address: | |
3825 | ||
8be56275 BW |
3826 | __array + (AP).__va_ndx - (BYTES_BIG_ENDIAN && sizeof (TYPE) < 4 |
3827 | ? sizeof (TYPE) | |
3828 | : __va_size (TYPE)) | |
03984308 BW |
3829 | |
3830 | The results are endian-dependent because values smaller than one word | |
ffbc8796 | 3831 | are aligned differently. */ |
03984308 | 3832 | |
633e4eb4 | 3833 | |
85d91d5b | 3834 | if (BYTES_BIG_ENDIAN && TREE_CODE (type_size) == INTEGER_CST) |
8be56275 | 3835 | { |
fa1615d7 | 3836 | t = fold_build2 (GE_EXPR, boolean_type_node, unshare_expr (type_size), |
e70312d4 | 3837 | size_int (PARM_BOUNDARY / BITS_PER_UNIT)); |
fa1615d7 BW |
3838 | t = fold_build3 (COND_EXPR, sizetype, t, unshare_expr (va_size), |
3839 | unshare_expr (type_size)); | |
85d53c1d | 3840 | size = t; |
8be56275 | 3841 | } |
85d53c1d | 3842 | else |
fa1615d7 | 3843 | size = unshare_expr (va_size); |
85d53c1d | 3844 | |
fa1615d7 | 3845 | t = fold_convert (sizetype, unshare_expr (ndx)); |
f4d3e7fd | 3846 | t = build2 (MINUS_EXPR, sizetype, t, size); |
5d49b6a7 | 3847 | addr = fold_build_pointer_plus (unshare_expr (array), t); |
03984308 | 3848 | |
85d53c1d | 3849 | addr = fold_convert (build_pointer_type (type), addr); |
08b0dc1b | 3850 | if (indirect) |
d6e9821f RH |
3851 | addr = build_va_arg_indirect_ref (addr); |
3852 | return build_va_arg_indirect_ref (addr); | |
03984308 BW |
3853 | } |
3854 | ||
3855 | ||
09fa8841 BW |
3856 | /* Builtins. */ |
3857 | ||
3858 | enum xtensa_builtin | |
3859 | { | |
3860 | XTENSA_BUILTIN_UMULSIDI3, | |
3861 | XTENSA_BUILTIN_max | |
3862 | }; | |
3863 | ||
3864 | ||
3865 | static void | |
3866 | xtensa_init_builtins (void) | |
3867 | { | |
6a7a462c | 3868 | tree ftype, decl; |
09fa8841 BW |
3869 | |
3870 | ftype = build_function_type_list (unsigned_intDI_type_node, | |
3871 | unsigned_intSI_type_node, | |
3872 | unsigned_intSI_type_node, NULL_TREE); | |
3873 | ||
6a7a462c BW |
3874 | decl = add_builtin_function ("__builtin_umulsidi3", ftype, |
3875 | XTENSA_BUILTIN_UMULSIDI3, BUILT_IN_MD, | |
3876 | "__umulsidi3", NULL_TREE); | |
3877 | TREE_NOTHROW (decl) = 1; | |
3878 | TREE_READONLY (decl) = 1; | |
09fa8841 BW |
3879 | } |
3880 | ||
3881 | ||
3882 | static tree | |
f311c3b4 NF |
3883 | xtensa_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *args, |
3884 | bool ignore ATTRIBUTE_UNUSED) | |
09fa8841 | 3885 | { |
4d732405 | 3886 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
09fa8841 BW |
3887 | tree arg0, arg1; |
3888 | ||
6a7a462c | 3889 | switch (fcode) |
09fa8841 | 3890 | { |
6a7a462c | 3891 | case XTENSA_BUILTIN_UMULSIDI3: |
f311c3b4 NF |
3892 | arg0 = args[0]; |
3893 | arg1 = args[1]; | |
09fa8841 BW |
3894 | if ((TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST) |
3895 | || TARGET_MUL32_HIGH) | |
3896 | return fold_build2 (MULT_EXPR, unsigned_intDI_type_node, | |
3897 | fold_convert (unsigned_intDI_type_node, arg0), | |
3898 | fold_convert (unsigned_intDI_type_node, arg1)); | |
6a7a462c BW |
3899 | break; |
3900 | ||
6a7a462c BW |
3901 | default: |
3902 | internal_error ("bad builtin code"); | |
3903 | break; | |
09fa8841 BW |
3904 | } |
3905 | ||
09fa8841 BW |
3906 | return NULL; |
3907 | } | |
3908 | ||
3909 | ||
3910 | static rtx | |
3911 | xtensa_expand_builtin (tree exp, rtx target, | |
3912 | rtx subtarget ATTRIBUTE_UNUSED, | |
ef4bddc2 | 3913 | machine_mode mode ATTRIBUTE_UNUSED, |
09fa8841 BW |
3914 | int ignore) |
3915 | { | |
ec3643e8 | 3916 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
4d732405 | 3917 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
6a7a462c BW |
3918 | |
3919 | switch (fcode) | |
3920 | { | |
3921 | case XTENSA_BUILTIN_UMULSIDI3: | |
3922 | /* The umulsidi3 builtin is just a mechanism to avoid calling the real | |
3923 | __umulsidi3 function when the Xtensa configuration can directly | |
3924 | implement it. If not, just call the function. */ | |
3925 | return expand_call (exp, target, ignore); | |
09fa8841 | 3926 | |
6a7a462c BW |
3927 | default: |
3928 | internal_error ("bad builtin code"); | |
3929 | } | |
09fa8841 BW |
3930 | return NULL_RTX; |
3931 | } | |
3932 | ||
a6e508f9 | 3933 | /* Worker function for TARGET_PREFERRED_RELOAD_CLASS. */ |
09fa8841 | 3934 | |
a6e508f9 AS |
3935 | static reg_class_t |
3936 | xtensa_preferred_reload_class (rtx x, reg_class_t rclass) | |
a8cacfd2 | 3937 | { |
a6e508f9 | 3938 | if (CONSTANT_P (x) && CONST_DOUBLE_P (x)) |
a8cacfd2 BW |
3939 | return NO_REGS; |
3940 | ||
89f6025d BW |
3941 | /* Don't use the stack pointer or hard frame pointer for reloads! |
3942 | The hard frame pointer would normally be OK except that it may | |
3943 | briefly hold an incoming argument in the prologue, and reload | |
3944 | won't know that it is live because the hard frame pointer is | |
3945 | treated specially. */ | |
3946 | ||
0a2aaacc | 3947 | if (rclass == AR_REGS || rclass == GR_REGS) |
89f6025d | 3948 | return RL_REGS; |
a8cacfd2 | 3949 | |
0a2aaacc | 3950 | return rclass; |
a8cacfd2 BW |
3951 | } |
3952 | ||
a6e508f9 AS |
3953 | /* Worker function for TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. */ |
3954 | ||
3955 | static reg_class_t | |
3956 | xtensa_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
3957 | reg_class_t rclass) | |
3958 | { | |
3959 | /* Don't use the stack pointer or hard frame pointer for reloads! | |
3960 | The hard frame pointer would normally be OK except that it may | |
3961 | briefly hold an incoming argument in the prologue, and reload | |
3962 | won't know that it is live because the hard frame pointer is | |
3963 | treated specially. */ | |
3964 | ||
3965 | if (rclass == AR_REGS || rclass == GR_REGS) | |
3966 | return RL_REGS; | |
3967 | ||
3968 | return rclass; | |
3969 | } | |
3970 | ||
3971 | /* Worker function for TARGET_SECONDARY_RELOAD. */ | |
a8cacfd2 | 3972 | |
a6e508f9 | 3973 | static reg_class_t |
a87cf97e | 3974 | xtensa_secondary_reload (bool in_p, rtx x, reg_class_t rclass, |
ef4bddc2 | 3975 | machine_mode mode, secondary_reload_info *sri) |
03984308 BW |
3976 | { |
3977 | int regno; | |
3978 | ||
37fbe8a3 | 3979 | if (in_p && constantpool_mem_p (x)) |
03984308 | 3980 | { |
37fbe8a3 | 3981 | if (rclass == FP_REGS) |
89f6025d | 3982 | return RL_REGS; |
37fbe8a3 BW |
3983 | |
3984 | if (mode == QImode) | |
3985 | sri->icode = CODE_FOR_reloadqi_literal; | |
3986 | else if (mode == HImode) | |
3987 | sri->icode = CODE_FOR_reloadhi_literal; | |
03984308 BW |
3988 | } |
3989 | ||
37fbe8a3 | 3990 | regno = xt_true_regnum (x); |
03984308 | 3991 | if (ACC_REG_P (regno)) |
0a2aaacc KG |
3992 | return ((rclass == GR_REGS || rclass == RL_REGS) ? NO_REGS : RL_REGS); |
3993 | if (rclass == ACC_REG) | |
89f6025d | 3994 | return (GP_REG_P (regno) ? NO_REGS : RL_REGS); |
03984308 BW |
3995 | |
3996 | return NO_REGS; | |
3997 | } | |
3998 | ||
3999 | ||
4000 | void | |
ffbc8796 | 4001 | order_regs_for_local_alloc (void) |
03984308 BW |
4002 | { |
4003 | if (!leaf_function_p ()) | |
4004 | { | |
590e2636 MF |
4005 | static const int reg_nonleaf_alloc_order[FIRST_PSEUDO_REGISTER] = |
4006 | REG_ALLOC_ORDER; | |
4007 | static const int reg_nonleaf_alloc_order_call0[FIRST_PSEUDO_REGISTER] = | |
4008 | { | |
4009 | 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 12, 13, 14, 15, | |
4010 | 18, | |
4011 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, | |
4012 | 0, 1, 16, 17, | |
4013 | 35, | |
4014 | }; | |
4015 | ||
4016 | memcpy (reg_alloc_order, TARGET_WINDOWED_ABI ? | |
4017 | reg_nonleaf_alloc_order : reg_nonleaf_alloc_order_call0, | |
03984308 BW |
4018 | FIRST_PSEUDO_REGISTER * sizeof (int)); |
4019 | } | |
4020 | else | |
4021 | { | |
4022 | int i, num_arg_regs; | |
4023 | int nxt = 0; | |
4024 | ||
3bbc2af6 KH |
4025 | /* Use the AR registers in increasing order (skipping a0 and a1) |
4026 | but save the incoming argument registers for a last resort. */ | |
38173d38 | 4027 | num_arg_regs = crtl->args.info.arg_words; |
03984308 BW |
4028 | if (num_arg_regs > MAX_ARGS_IN_REGISTERS) |
4029 | num_arg_regs = MAX_ARGS_IN_REGISTERS; | |
4030 | for (i = GP_ARG_FIRST; i < 16 - num_arg_regs; i++) | |
4031 | reg_alloc_order[nxt++] = i + num_arg_regs; | |
4032 | for (i = 0; i < num_arg_regs; i++) | |
4033 | reg_alloc_order[nxt++] = GP_ARG_FIRST + i; | |
4034 | ||
3bbc2af6 | 4035 | /* List the coprocessor registers in order. */ |
985d0d50 BW |
4036 | for (i = 0; i < BR_REG_NUM; i++) |
4037 | reg_alloc_order[nxt++] = BR_REG_FIRST + i; | |
4038 | ||
3bbc2af6 | 4039 | /* List the FP registers in order for now. */ |
03984308 BW |
4040 | for (i = 0; i < 16; i++) |
4041 | reg_alloc_order[nxt++] = FP_REG_FIRST + i; | |
4042 | ||
638db43e | 4043 | /* GCC requires that we list *all* the registers.... */ |
03984308 BW |
4044 | reg_alloc_order[nxt++] = 0; /* a0 = return address */ |
4045 | reg_alloc_order[nxt++] = 1; /* a1 = stack pointer */ | |
4046 | reg_alloc_order[nxt++] = 16; /* pseudo frame pointer */ | |
4047 | reg_alloc_order[nxt++] = 17; /* pseudo arg pointer */ | |
4048 | ||
03984308 BW |
4049 | reg_alloc_order[nxt++] = ACC_REG_FIRST; /* MAC16 accumulator */ |
4050 | } | |
4051 | } | |
4052 | ||
4053 | ||
01abf342 BW |
4054 | /* Some Xtensa targets support multiple bss sections. If the section |
4055 | name ends with ".bss", add SECTION_BSS to the flags. */ | |
4056 | ||
4057 | static unsigned int | |
ffbc8796 | 4058 | xtensa_multibss_section_type_flags (tree decl, const char *name, int reloc) |
01abf342 BW |
4059 | { |
4060 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
4061 | const char *suffix; | |
4062 | ||
4063 | suffix = strrchr (name, '.'); | |
4064 | if (suffix && strcmp (suffix, ".bss") == 0) | |
4065 | { | |
4066 | if (!decl || (TREE_CODE (decl) == VAR_DECL | |
4067 | && DECL_INITIAL (decl) == NULL_TREE)) | |
4068 | flags |= SECTION_BSS; /* @nobits */ | |
4069 | else | |
d4ee4d25 | 4070 | warning (0, "only uninitialized variables can be placed in a " |
7e5baa7e | 4071 | "%<.bss%> section"); |
01abf342 BW |
4072 | } |
4073 | ||
4074 | return flags; | |
4075 | } | |
4076 | ||
4077 | ||
b64a1b53 RH |
4078 | /* The literal pool stays with the function. */ |
4079 | ||
d6b5193b | 4080 | static section * |
ef4bddc2 | 4081 | xtensa_select_rtx_section (machine_mode mode ATTRIBUTE_UNUSED, |
ffbc8796 BW |
4082 | rtx x ATTRIBUTE_UNUSED, |
4083 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 4084 | { |
d6b5193b | 4085 | return function_section (current_function_decl); |
b64a1b53 | 4086 | } |
fb49053f | 4087 | |
5378dda2 AS |
4088 | /* Worker function for TARGET_REGISTER_MOVE_COST. */ |
4089 | ||
4090 | static int | |
ef4bddc2 | 4091 | xtensa_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
4092 | reg_class_t from, reg_class_t to) |
4093 | { | |
4094 | if (from == to && from != BR_REGS && to != BR_REGS) | |
4095 | return 2; | |
4096 | else if (reg_class_subset_p (from, AR_REGS) | |
4097 | && reg_class_subset_p (to, AR_REGS)) | |
4098 | return 2; | |
4099 | else if (reg_class_subset_p (from, AR_REGS) && to == ACC_REG) | |
4100 | return 3; | |
4101 | else if (from == ACC_REG && reg_class_subset_p (to, AR_REGS)) | |
4102 | return 3; | |
4103 | else | |
4104 | return 10; | |
4105 | } | |
4106 | ||
4107 | /* Worker function for TARGET_MEMORY_MOVE_COST. */ | |
4108 | ||
4109 | static int | |
ef4bddc2 | 4110 | xtensa_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
4111 | reg_class_t rclass ATTRIBUTE_UNUSED, |
4112 | bool in ATTRIBUTE_UNUSED) | |
4113 | { | |
4114 | return 4; | |
4115 | } | |
ffbc8796 | 4116 | |
3c50106f RH |
4117 | /* Compute a (partial) cost for rtx X. Return true if the complete |
4118 | cost has been computed, and false if subexpressions should be | |
4119 | scanned. In either case, *TOTAL contains the cost result. */ | |
4120 | ||
4121 | static bool | |
e548c9df AM |
4122 | xtensa_rtx_costs (rtx x, machine_mode mode, int outer_code, |
4123 | int opno ATTRIBUTE_UNUSED, | |
ccd02e73 | 4124 | int *total, bool speed) |
3c50106f | 4125 | { |
e548c9df AM |
4126 | int code = GET_CODE (x); |
4127 | ||
3c50106f RH |
4128 | switch (code) |
4129 | { | |
4130 | case CONST_INT: | |
4131 | switch (outer_code) | |
4132 | { | |
4133 | case SET: | |
4134 | if (xtensa_simm12b (INTVAL (x))) | |
4135 | { | |
2180cdd8 | 4136 | *total = speed ? COSTS_N_INSNS (1) : 0; |
3c50106f RH |
4137 | return true; |
4138 | } | |
4139 | break; | |
4140 | case PLUS: | |
4141 | if (xtensa_simm8 (INTVAL (x)) | |
4142 | || xtensa_simm8x256 (INTVAL (x))) | |
4143 | { | |
4144 | *total = 0; | |
4145 | return true; | |
4146 | } | |
4147 | break; | |
4148 | case AND: | |
4149 | if (xtensa_mask_immediate (INTVAL (x))) | |
4150 | { | |
4151 | *total = 0; | |
4152 | return true; | |
4153 | } | |
4154 | break; | |
4155 | case COMPARE: | |
4156 | if ((INTVAL (x) == 0) || xtensa_b4const (INTVAL (x))) | |
4157 | { | |
4158 | *total = 0; | |
4159 | return true; | |
4160 | } | |
4161 | break; | |
4162 | case ASHIFT: | |
4163 | case ASHIFTRT: | |
4164 | case LSHIFTRT: | |
4165 | case ROTATE: | |
4166 | case ROTATERT: | |
3bbc2af6 | 4167 | /* No way to tell if X is the 2nd operand so be conservative. */ |
3c50106f RH |
4168 | default: break; |
4169 | } | |
4170 | if (xtensa_simm12b (INTVAL (x))) | |
4171 | *total = 5; | |
f42f5a1b BW |
4172 | else if (TARGET_CONST16) |
4173 | *total = COSTS_N_INSNS (2); | |
3c50106f RH |
4174 | else |
4175 | *total = 6; | |
4176 | return true; | |
4177 | ||
4178 | case CONST: | |
4179 | case LABEL_REF: | |
4180 | case SYMBOL_REF: | |
f42f5a1b BW |
4181 | if (TARGET_CONST16) |
4182 | *total = COSTS_N_INSNS (2); | |
4183 | else | |
4184 | *total = 5; | |
3c50106f RH |
4185 | return true; |
4186 | ||
4187 | case CONST_DOUBLE: | |
f42f5a1b BW |
4188 | if (TARGET_CONST16) |
4189 | *total = COSTS_N_INSNS (4); | |
4190 | else | |
4191 | *total = 7; | |
3c50106f RH |
4192 | return true; |
4193 | ||
4194 | case MEM: | |
4195 | { | |
4196 | int num_words = | |
e548c9df | 4197 | (GET_MODE_SIZE (mode) > UNITS_PER_WORD) ? 2 : 1; |
3c50106f | 4198 | |
e548c9df | 4199 | if (memory_address_p (mode, XEXP ((x), 0))) |
3c50106f RH |
4200 | *total = COSTS_N_INSNS (num_words); |
4201 | else | |
4202 | *total = COSTS_N_INSNS (2*num_words); | |
4203 | return true; | |
4204 | } | |
4205 | ||
4206 | case FFS: | |
09fa8841 | 4207 | case CTZ: |
3c50106f RH |
4208 | *total = COSTS_N_INSNS (TARGET_NSA ? 5 : 50); |
4209 | return true; | |
4210 | ||
09fa8841 | 4211 | case CLZ: |
ccd02e73 | 4212 | case CLRSB: |
09fa8841 BW |
4213 | *total = COSTS_N_INSNS (TARGET_NSA ? 1 : 50); |
4214 | return true; | |
4215 | ||
ccd02e73 TJJS |
4216 | case BSWAP: |
4217 | *total = COSTS_N_INSNS (mode == HImode ? 3 : 5); | |
4218 | return true; | |
4219 | ||
3c50106f | 4220 | case NOT: |
e548c9df | 4221 | *total = COSTS_N_INSNS (mode == DImode ? 3 : 2); |
3c50106f RH |
4222 | return true; |
4223 | ||
4224 | case AND: | |
4225 | case IOR: | |
4226 | case XOR: | |
e548c9df | 4227 | if (mode == DImode) |
3c50106f RH |
4228 | *total = COSTS_N_INSNS (2); |
4229 | else | |
4230 | *total = COSTS_N_INSNS (1); | |
4231 | return true; | |
4232 | ||
4233 | case ASHIFT: | |
4234 | case ASHIFTRT: | |
4235 | case LSHIFTRT: | |
e548c9df | 4236 | if (mode == DImode) |
3c50106f RH |
4237 | *total = COSTS_N_INSNS (50); |
4238 | else | |
4239 | *total = COSTS_N_INSNS (1); | |
4240 | return true; | |
4241 | ||
4242 | case ABS: | |
ccd02e73 | 4243 | case NEG: |
3c50106f | 4244 | { |
e548c9df | 4245 | if (mode == SFmode) |
3c50106f | 4246 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 4247 | else if (mode == DFmode) |
3c50106f | 4248 | *total = COSTS_N_INSNS (50); |
ccd02e73 | 4249 | else if (mode == DImode) |
3c50106f | 4250 | *total = COSTS_N_INSNS (4); |
ccd02e73 TJJS |
4251 | else |
4252 | *total = COSTS_N_INSNS (1); | |
3c50106f RH |
4253 | return true; |
4254 | } | |
4255 | ||
4256 | case PLUS: | |
4257 | case MINUS: | |
4258 | { | |
e548c9df | 4259 | if (mode == SFmode) |
3c50106f | 4260 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 4261 | else if (mode == DFmode || mode == DImode) |
3c50106f RH |
4262 | *total = COSTS_N_INSNS (50); |
4263 | else | |
4264 | *total = COSTS_N_INSNS (1); | |
4265 | return true; | |
4266 | } | |
4267 | ||
3c50106f RH |
4268 | case MULT: |
4269 | { | |
e548c9df | 4270 | if (mode == SFmode) |
3c50106f | 4271 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); |
e548c9df | 4272 | else if (mode == DFmode) |
3c50106f | 4273 | *total = COSTS_N_INSNS (50); |
e548c9df | 4274 | else if (mode == DImode) |
09fa8841 | 4275 | *total = COSTS_N_INSNS (TARGET_MUL32_HIGH ? 10 : 50); |
3c50106f RH |
4276 | else if (TARGET_MUL32) |
4277 | *total = COSTS_N_INSNS (4); | |
4278 | else if (TARGET_MAC16) | |
4279 | *total = COSTS_N_INSNS (16); | |
4280 | else if (TARGET_MUL16) | |
4281 | *total = COSTS_N_INSNS (12); | |
4282 | else | |
4283 | *total = COSTS_N_INSNS (50); | |
4284 | return true; | |
4285 | } | |
4286 | ||
4287 | case DIV: | |
4288 | case MOD: | |
4289 | { | |
e548c9df | 4290 | if (mode == SFmode) |
3c50106f RH |
4291 | { |
4292 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); | |
4293 | return true; | |
4294 | } | |
e548c9df | 4295 | else if (mode == DFmode) |
3c50106f RH |
4296 | { |
4297 | *total = COSTS_N_INSNS (50); | |
4298 | return true; | |
4299 | } | |
4300 | } | |
3bbc2af6 | 4301 | /* Fall through. */ |
3c50106f RH |
4302 | |
4303 | case UDIV: | |
4304 | case UMOD: | |
4305 | { | |
e548c9df | 4306 | if (mode == DImode) |
ccd02e73 | 4307 | *total = COSTS_N_INSNS (speed ? 100 : 50); |
3c50106f RH |
4308 | else if (TARGET_DIV32) |
4309 | *total = COSTS_N_INSNS (32); | |
4310 | else | |
ccd02e73 | 4311 | *total = COSTS_N_INSNS (speed ? 100 : 50); |
3c50106f RH |
4312 | return true; |
4313 | } | |
4314 | ||
4315 | case SQRT: | |
e548c9df | 4316 | if (mode == SFmode) |
3c50106f RH |
4317 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); |
4318 | else | |
4319 | *total = COSTS_N_INSNS (50); | |
4320 | return true; | |
4321 | ||
4322 | case SMIN: | |
4323 | case UMIN: | |
4324 | case SMAX: | |
4325 | case UMAX: | |
4326 | *total = COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); | |
4327 | return true; | |
4328 | ||
4329 | case SIGN_EXTRACT: | |
4330 | case SIGN_EXTEND: | |
4331 | *total = COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); | |
4332 | return true; | |
4333 | ||
4334 | case ZERO_EXTRACT: | |
4335 | case ZERO_EXTEND: | |
48e9954d | 4336 | case IF_THEN_ELSE: |
3c50106f RH |
4337 | *total = COSTS_N_INSNS (1); |
4338 | return true; | |
4339 | ||
4340 | default: | |
4341 | return false; | |
4342 | } | |
4343 | } | |
4344 | ||
ccd02e73 | 4345 | static bool |
75ab2f0e | 4346 | xtensa_is_insn_L32R_p (const rtx_insn *insn) |
ccd02e73 TJJS |
4347 | { |
4348 | rtx x = PATTERN (insn); | |
4349 | ||
46880cd8 TJJS |
4350 | if (GET_CODE (x) != SET) |
4351 | return false; | |
4352 | ||
4353 | x = XEXP (x, 1); | |
4354 | if (MEM_P (x)) | |
ccd02e73 | 4355 | { |
46880cd8 TJJS |
4356 | x = XEXP (x, 0); |
4357 | return (SYMBOL_REF_P (x) || CONST_INT_P (x)) | |
4358 | && CONSTANT_POOL_ADDRESS_P (x); | |
ccd02e73 TJJS |
4359 | } |
4360 | ||
46880cd8 TJJS |
4361 | /* relaxed MOVI instructions, that will be converted to L32R by the |
4362 | assembler. */ | |
4363 | if (CONST_INT_P (x) | |
4364 | && ! xtensa_simm12b (INTVAL (x))) | |
4365 | return true; | |
4366 | ||
ccd02e73 TJJS |
4367 | return false; |
4368 | } | |
4369 | ||
4370 | /* Compute a relative costs of RTL insns. This is necessary in order to | |
4371 | achieve better RTL insn splitting/combination result. */ | |
4372 | ||
4373 | static int | |
4374 | xtensa_insn_cost (rtx_insn *insn, bool speed) | |
4375 | { | |
4376 | if (!(recog_memoized (insn) < 0)) | |
4377 | { | |
4378 | int len = get_attr_length (insn), n = (len + 2) / 3; | |
4379 | ||
4380 | if (len == 0) | |
4381 | return COSTS_N_INSNS (0); | |
4382 | ||
4383 | if (speed) /* For speed cost. */ | |
4384 | { | |
4385 | /* "L32R" may be particular slow (implementation-dependent). */ | |
4386 | if (xtensa_is_insn_L32R_p (insn)) | |
4387 | return COSTS_N_INSNS (1 + xtensa_extra_l32r_costs); | |
4388 | ||
4389 | /* Cost based on the pipeline model. */ | |
4390 | switch (get_attr_type (insn)) | |
4391 | { | |
4392 | case TYPE_STORE: | |
4393 | case TYPE_MOVE: | |
4394 | case TYPE_ARITH: | |
4395 | case TYPE_MULTI: | |
4396 | case TYPE_NOP: | |
4397 | case TYPE_FSTORE: | |
4398 | return COSTS_N_INSNS (n); | |
4399 | ||
4400 | case TYPE_LOAD: | |
4401 | return COSTS_N_INSNS (n - 1 + 2); | |
4402 | ||
4403 | case TYPE_JUMP: | |
4404 | case TYPE_CALL: | |
4405 | return COSTS_N_INSNS (n - 1 + 3); | |
4406 | ||
4407 | case TYPE_FCONV: | |
4408 | case TYPE_FLOAD: | |
4409 | case TYPE_MUL16: | |
4410 | case TYPE_MUL32: | |
4411 | case TYPE_RSR: | |
4412 | return COSTS_N_INSNS (n * 2); | |
4413 | ||
4414 | case TYPE_FMADD: | |
4415 | return COSTS_N_INSNS (n * 4); | |
4416 | ||
4417 | case TYPE_DIV32: | |
4418 | return COSTS_N_INSNS (n * 16); | |
4419 | ||
4420 | default: | |
4421 | break; | |
4422 | } | |
4423 | } | |
4424 | else /* For size cost. */ | |
4425 | { | |
4426 | /* Cost based on the instruction length. */ | |
4427 | if (get_attr_type (insn) != TYPE_UNKNOWN) | |
4428 | { | |
4429 | /* "L32R" itself plus constant in litpool. */ | |
4430 | if (xtensa_is_insn_L32R_p (insn)) | |
4431 | return COSTS_N_INSNS (2) + 1; | |
4432 | ||
4433 | /* Consider ".n" short instructions. */ | |
4434 | return COSTS_N_INSNS (n) - (n * 3 - len); | |
4435 | } | |
4436 | } | |
4437 | } | |
4438 | ||
4439 | /* Fall back. */ | |
4440 | return pattern_cost (PATTERN (insn), speed); | |
4441 | } | |
4442 | ||
bd5bd7ac KH |
4443 | /* Worker function for TARGET_RETURN_IN_MEMORY. */ |
4444 | ||
4c45af42 | 4445 | static bool |
586de218 | 4446 | xtensa_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) |
4c45af42 KH |
4447 | { |
4448 | return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) | |
4449 | > 4 * UNITS_PER_WORD); | |
4450 | } | |
4451 | ||
e2b2d01e AS |
4452 | /* Worker function for TARGET_FUNCTION_VALUE. */ |
4453 | ||
4454 | rtx | |
4455 | xtensa_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, | |
4456 | bool outgoing) | |
4457 | { | |
4458 | return gen_rtx_REG ((INTEGRAL_TYPE_P (valtype) | |
4459 | && TYPE_PRECISION (valtype) < BITS_PER_WORD) | |
4460 | ? SImode : TYPE_MODE (valtype), | |
4461 | outgoing ? GP_OUTGOING_RETURN : GP_RETURN); | |
4462 | } | |
7f0ee694 | 4463 | |
dde8a3a4 AS |
4464 | /* Worker function for TARGET_LIBCALL_VALUE. */ |
4465 | ||
4466 | static rtx | |
ef4bddc2 | 4467 | xtensa_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
dde8a3a4 AS |
4468 | { |
4469 | return gen_rtx_REG ((GET_MODE_CLASS (mode) == MODE_INT | |
4470 | && GET_MODE_SIZE (mode) < UNITS_PER_WORD) | |
4471 | ? SImode : mode, GP_RETURN); | |
4472 | } | |
4473 | ||
4474 | /* Worker function TARGET_FUNCTION_VALUE_REGNO_P. */ | |
4475 | ||
4476 | static bool | |
4477 | xtensa_function_value_regno_p (const unsigned int regno) | |
4478 | { | |
71cd6a04 | 4479 | return (regno >= GP_RETURN && regno < GP_RETURN + GP_RETURN_REG_COUNT); |
dde8a3a4 AS |
4480 | } |
4481 | ||
2b4fa409 RH |
4482 | /* The static chain is passed in memory. Provide rtx giving 'mem' |
4483 | expressions that denote where they are stored. */ | |
4484 | ||
4485 | static rtx | |
c21df29b | 4486 | xtensa_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
2b4fa409 | 4487 | { |
590e2636 MF |
4488 | if (TARGET_WINDOWED_ABI) |
4489 | { | |
4490 | rtx base = incoming_p ? arg_pointer_rtx : stack_pointer_rtx; | |
4491 | return gen_frame_mem (Pmode, plus_constant (Pmode, base, | |
4492 | -5 * UNITS_PER_WORD)); | |
4493 | } | |
4494 | else | |
4495 | return gen_rtx_REG (Pmode, A8_REG); | |
2b4fa409 RH |
4496 | } |
4497 | ||
4498 | ||
7f0ee694 BW |
4499 | /* TRAMPOLINE_TEMPLATE: For Xtensa, the trampoline must perform an ENTRY |
4500 | instruction with a minimal stack frame in order to get some free | |
4501 | registers. Once the actual call target is known, the proper stack frame | |
4502 | size is extracted from the ENTRY instruction at the target and the | |
4503 | current frame is adjusted to match. The trampoline then transfers | |
4504 | control to the instruction following the ENTRY at the target. Note: | |
4505 | this assumes that the target begins with an ENTRY instruction. */ | |
4506 | ||
3c1229cb RH |
4507 | static void |
4508 | xtensa_asm_trampoline_template (FILE *stream) | |
7f0ee694 BW |
4509 | { |
4510 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); | |
4511 | ||
4512 | fprintf (stream, "\t.begin no-transform\n"); | |
7f0ee694 | 4513 | |
590e2636 | 4514 | if (TARGET_WINDOWED_ABI) |
7f0ee694 | 4515 | { |
590e2636 | 4516 | fprintf (stream, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); |
7f0ee694 | 4517 | |
590e2636 MF |
4518 | if (use_call0) |
4519 | { | |
4520 | /* Save the return address. */ | |
4521 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4522 | |
590e2636 MF |
4523 | /* Use a CALL0 instruction to skip past the constants and in the |
4524 | process get the PC into A0. This allows PC-relative access to | |
4525 | the constants without relying on L32R. */ | |
4526 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4527 | } | |
4528 | else | |
4529 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4530 | |
590e2636 MF |
4531 | fprintf (stream, "\t.align\t4\n"); |
4532 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4533 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4534 | fprintf (stream, ".Lskipconsts:\n"); | |
4535 | ||
4536 | /* Load the static chain and function address from the trampoline. */ | |
4537 | if (use_call0) | |
4538 | { | |
4539 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4540 | fprintf (stream, "\tl32i\ta9, a0, 0\n"); | |
4541 | fprintf (stream, "\tl32i\ta8, a0, 4\n"); | |
4542 | } | |
4543 | else | |
4544 | { | |
4545 | fprintf (stream, "\tl32r\ta9, .Lchainval\n"); | |
4546 | fprintf (stream, "\tl32r\ta8, .Lfnaddr\n"); | |
4547 | } | |
4548 | ||
4549 | /* Store the static chain. */ | |
4550 | fprintf (stream, "\ts32i\ta9, sp, %d\n", MIN_FRAME_SIZE - 20); | |
4551 | ||
4552 | /* Set the proper stack pointer value. */ | |
4553 | fprintf (stream, "\tl32i\ta9, a8, 0\n"); | |
4554 | fprintf (stream, "\textui\ta9, a9, %d, 12\n", | |
4555 | TARGET_BIG_ENDIAN ? 8 : 12); | |
4556 | fprintf (stream, "\tslli\ta9, a9, 3\n"); | |
4557 | fprintf (stream, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); | |
4558 | fprintf (stream, "\tsub\ta9, sp, a9\n"); | |
4559 | fprintf (stream, "\tmovsp\tsp, a9\n"); | |
4560 | ||
4561 | if (use_call0) | |
4562 | /* Restore the return address. */ | |
4563 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4564 | ||
4565 | /* Jump to the instruction following the ENTRY. */ | |
4566 | fprintf (stream, "\taddi\ta8, a8, 3\n"); | |
4567 | fprintf (stream, "\tjx\ta8\n"); | |
4568 | ||
4569 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ | |
4570 | if (use_call0) | |
4571 | fprintf (stream, "\t.byte\t0\n"); | |
4572 | else | |
4573 | fprintf (stream, "\tnop\n"); | |
7f0ee694 BW |
4574 | } |
4575 | else | |
4576 | { | |
590e2636 MF |
4577 | if (use_call0) |
4578 | { | |
4579 | /* Save the return address. */ | |
4580 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4581 | |
590e2636 MF |
4582 | /* Use a CALL0 instruction to skip past the constants and in the |
4583 | process get the PC into A0. This allows PC-relative access to | |
4584 | the constants without relying on L32R. */ | |
4585 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4586 | } | |
4587 | else | |
4588 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4589 | |
590e2636 MF |
4590 | fprintf (stream, "\t.align\t4\n"); |
4591 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4592 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4593 | fprintf (stream, ".Lskipconsts:\n"); | |
7f0ee694 | 4594 | |
590e2636 MF |
4595 | /* Load the static chain and function address from the trampoline. */ |
4596 | if (use_call0) | |
4597 | { | |
4598 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4599 | fprintf (stream, "\tl32i\ta8, a0, 0\n"); | |
4600 | fprintf (stream, "\tl32i\ta9, a0, 4\n"); | |
4601 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4602 | } | |
4603 | else | |
4604 | { | |
4605 | fprintf (stream, "\tl32r\ta8, .Lchainval\n"); | |
4606 | fprintf (stream, "\tl32r\ta9, .Lfnaddr\n"); | |
4607 | } | |
4608 | fprintf (stream, "\tjx\ta9\n"); | |
7f0ee694 | 4609 | |
590e2636 MF |
4610 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ |
4611 | if (use_call0) | |
4612 | fprintf (stream, "\t.byte\t0\n"); | |
4613 | else | |
4614 | fprintf (stream, "\tnop\n"); | |
4615 | } | |
7f0ee694 BW |
4616 | fprintf (stream, "\t.end no-transform\n"); |
4617 | } | |
4618 | ||
3c1229cb RH |
4619 | static void |
4620 | xtensa_trampoline_init (rtx m_tramp, tree fndecl, rtx chain) | |
7f0ee694 | 4621 | { |
3c1229cb | 4622 | rtx func = XEXP (DECL_RTL (fndecl), 0); |
7f0ee694 | 4623 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); |
590e2636 MF |
4624 | int chain_off; |
4625 | int func_off; | |
4626 | ||
4627 | if (TARGET_WINDOWED_ABI) | |
4628 | { | |
4629 | chain_off = use_call0 ? 12 : 8; | |
4630 | func_off = use_call0 ? 16 : 12; | |
4631 | } | |
4632 | else | |
4633 | { | |
4634 | chain_off = use_call0 ? 8 : 4; | |
4635 | func_off = use_call0 ? 12 : 8; | |
4636 | } | |
3c1229cb RH |
4637 | |
4638 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
4639 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
4640 | ||
4641 | emit_move_insn (adjust_address (m_tramp, SImode, chain_off), chain); | |
4642 | emit_move_insn (adjust_address (m_tramp, SImode, func_off), func); | |
7f0ee694 | 4643 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_sync_caches"), |
db69559b | 4644 | LCT_NORMAL, VOIDmode, XEXP (m_tramp, 0), Pmode); |
7f0ee694 BW |
4645 | } |
4646 | ||
1a627b35 RS |
4647 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
4648 | ||
4649 | static bool | |
ef4bddc2 | 4650 | xtensa_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
1a627b35 RS |
4651 | { |
4652 | return !xtensa_tls_referenced_p (x); | |
4653 | } | |
7f0ee694 | 4654 | |
6383386a FY |
4655 | /* Implement TARGET_CAN_USE_DOLOOP_P. */ |
4656 | ||
4657 | static bool | |
4658 | xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
4659 | unsigned int loop_depth, bool entered_at_top) | |
4660 | { | |
4661 | /* Considering limitations in the hardware, only use doloop | |
4662 | for innermost loops which must be entered from the top. */ | |
4663 | if (loop_depth > 1 || !entered_at_top) | |
4664 | return false; | |
4665 | ||
4666 | return true; | |
4667 | } | |
4668 | ||
4669 | /* NULL if INSN insn is valid within a low-overhead loop. | |
4670 | Otherwise return why doloop cannot be applied. */ | |
4671 | ||
4672 | static const char * | |
4673 | xtensa_invalid_within_doloop (const rtx_insn *insn) | |
4674 | { | |
4675 | if (CALL_P (insn)) | |
4676 | return "Function call in the loop."; | |
4677 | ||
4678 | if (JUMP_P (insn) && INSN_CODE (insn) == CODE_FOR_return) | |
4679 | return "Return from a call instruction in the loop."; | |
4680 | ||
4681 | return NULL; | |
4682 | } | |
4683 | ||
4684 | /* Optimize LOOP. */ | |
4685 | ||
4686 | static bool | |
4687 | hwloop_optimize (hwloop_info loop) | |
4688 | { | |
4689 | int i; | |
4690 | edge entry_edge; | |
4691 | basic_block entry_bb; | |
4692 | rtx iter_reg; | |
4693 | rtx_insn *insn, *seq, *entry_after; | |
4694 | ||
4695 | if (loop->depth > 1) | |
4696 | { | |
4697 | if (dump_file) | |
4698 | fprintf (dump_file, ";; loop %d is not innermost\n", | |
4699 | loop->loop_no); | |
4700 | return false; | |
4701 | } | |
4702 | ||
4703 | if (!loop->incoming_dest) | |
4704 | { | |
4705 | if (dump_file) | |
4706 | fprintf (dump_file, ";; loop %d has more than one entry\n", | |
4707 | loop->loop_no); | |
4708 | return false; | |
4709 | } | |
4710 | ||
4711 | if (loop->incoming_dest != loop->head) | |
4712 | { | |
4713 | if (dump_file) | |
4714 | fprintf (dump_file, ";; loop %d is not entered from head\n", | |
4715 | loop->loop_no); | |
4716 | return false; | |
4717 | } | |
4718 | ||
4719 | if (loop->has_call || loop->has_asm) | |
4720 | { | |
4721 | if (dump_file) | |
4722 | fprintf (dump_file, ";; loop %d has invalid insn\n", | |
4723 | loop->loop_no); | |
4724 | return false; | |
4725 | } | |
4726 | ||
4727 | /* Scan all the blocks to make sure they don't use iter_reg. */ | |
4728 | if (loop->iter_reg_used || loop->iter_reg_used_outside) | |
4729 | { | |
4730 | if (dump_file) | |
4731 | fprintf (dump_file, ";; loop %d uses iterator\n", | |
4732 | loop->loop_no); | |
4733 | return false; | |
4734 | } | |
4735 | ||
4736 | /* Check if start_label appears before doloop_end. */ | |
4737 | insn = loop->start_label; | |
4738 | while (insn && insn != loop->loop_end) | |
4739 | insn = NEXT_INSN (insn); | |
4740 | ||
4741 | if (!insn) | |
4742 | { | |
4743 | if (dump_file) | |
4744 | fprintf (dump_file, ";; loop %d start_label not before loop_end\n", | |
4745 | loop->loop_no); | |
4746 | return false; | |
4747 | } | |
4748 | ||
4749 | /* Get the loop iteration register. */ | |
4750 | iter_reg = loop->iter_reg; | |
4751 | ||
4752 | gcc_assert (REG_P (iter_reg)); | |
4753 | ||
4754 | entry_edge = NULL; | |
4755 | ||
4756 | FOR_EACH_VEC_SAFE_ELT (loop->incoming, i, entry_edge) | |
4757 | if (entry_edge->flags & EDGE_FALLTHRU) | |
4758 | break; | |
4759 | ||
4760 | if (entry_edge == NULL) | |
4761 | return false; | |
4762 | ||
4763 | /* Place the zero_cost_loop_start instruction before the loop. */ | |
4764 | entry_bb = entry_edge->src; | |
4765 | ||
4766 | start_sequence (); | |
4767 | ||
4768 | insn = emit_insn (gen_zero_cost_loop_start (loop->iter_reg, | |
4769 | loop->start_label, | |
4770 | loop->iter_reg)); | |
4771 | ||
4772 | seq = get_insns (); | |
4773 | ||
d7326aaf MF |
4774 | entry_after = BB_END (entry_bb); |
4775 | if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1 | |
4776 | || !entry_after) | |
6383386a FY |
4777 | { |
4778 | basic_block new_bb; | |
4779 | edge e; | |
4780 | edge_iterator ei; | |
4781 | ||
4782 | emit_insn_before (seq, BB_HEAD (loop->head)); | |
4783 | seq = emit_label_before (gen_label_rtx (), seq); | |
4784 | new_bb = create_basic_block (seq, insn, entry_bb); | |
4785 | FOR_EACH_EDGE (e, ei, loop->incoming) | |
4786 | { | |
4787 | if (!(e->flags & EDGE_FALLTHRU)) | |
4788 | redirect_edge_and_branch_force (e, new_bb); | |
4789 | else | |
4790 | redirect_edge_succ (e, new_bb); | |
4791 | } | |
4792 | ||
4793 | make_edge (new_bb, loop->head, 0); | |
4794 | } | |
4795 | else | |
4796 | { | |
6383386a FY |
4797 | while (DEBUG_INSN_P (entry_after) |
4798 | || (NOTE_P (entry_after) | |
00b94487 | 4799 | && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK)) |
6383386a FY |
4800 | entry_after = PREV_INSN (entry_after); |
4801 | ||
4802 | emit_insn_after (seq, entry_after); | |
4803 | } | |
4804 | ||
4805 | end_sequence (); | |
4806 | ||
4807 | return true; | |
4808 | } | |
4809 | ||
4810 | /* A callback for the hw-doloop pass. Called when a loop we have discovered | |
4811 | turns out not to be optimizable; we have to split the loop_end pattern into | |
4812 | a subtract and a test. */ | |
4813 | ||
4814 | static void | |
4815 | hwloop_fail (hwloop_info loop) | |
4816 | { | |
4817 | rtx test; | |
4818 | rtx_insn *insn = loop->loop_end; | |
4819 | ||
4820 | emit_insn_before (gen_addsi3 (loop->iter_reg, | |
4821 | loop->iter_reg, | |
4822 | constm1_rtx), | |
4823 | loop->loop_end); | |
4824 | ||
4825 | test = gen_rtx_NE (VOIDmode, loop->iter_reg, const0_rtx); | |
4826 | insn = emit_jump_insn_before (gen_cbranchsi4 (test, | |
4827 | loop->iter_reg, const0_rtx, | |
4828 | loop->start_label), | |
4829 | loop->loop_end); | |
4830 | ||
4831 | JUMP_LABEL (insn) = loop->start_label; | |
4832 | LABEL_NUSES (loop->start_label)++; | |
4833 | delete_insn (loop->loop_end); | |
4834 | } | |
4835 | ||
4836 | /* A callback for the hw-doloop pass. This function examines INSN; if | |
4837 | it is a doloop_end pattern we recognize, return the reg rtx for the | |
4838 | loop counter. Otherwise, return NULL_RTX. */ | |
4839 | ||
4840 | static rtx | |
4841 | hwloop_pattern_reg (rtx_insn *insn) | |
4842 | { | |
4843 | rtx reg; | |
4844 | ||
4845 | if (!JUMP_P (insn) || recog_memoized (insn) != CODE_FOR_loop_end) | |
4846 | return NULL_RTX; | |
4847 | ||
4848 | reg = SET_DEST (XVECEXP (PATTERN (insn), 0, 1)); | |
4849 | if (!REG_P (reg)) | |
4850 | return NULL_RTX; | |
4851 | ||
4852 | return reg; | |
4853 | } | |
4854 | ||
4855 | ||
4856 | static struct hw_doloop_hooks xtensa_doloop_hooks = | |
4857 | { | |
4858 | hwloop_pattern_reg, | |
4859 | hwloop_optimize, | |
4860 | hwloop_fail | |
4861 | }; | |
4862 | ||
4863 | /* Run from machine_dependent_reorg, this pass looks for doloop_end insns | |
4864 | and tries to rewrite the RTL of these loops so that proper Xtensa | |
4865 | hardware loops are generated. */ | |
4866 | ||
4867 | static void | |
4868 | xtensa_reorg_loops (void) | |
4869 | { | |
1a711a0b MF |
4870 | if (TARGET_LOOPS) |
4871 | reorg_loops (false, &xtensa_doloop_hooks); | |
c6836000 | 4872 | } |
6383386a FY |
4873 | |
4874 | /* Implement the TARGET_MACHINE_DEPENDENT_REORG pass. */ | |
4875 | ||
4876 | static void | |
4877 | xtensa_reorg (void) | |
4878 | { | |
4879 | /* We are freeing block_for_insn in the toplev to keep compatibility | |
4880 | with old MDEP_REORGS that are not CFG based. Recompute it now. */ | |
4881 | compute_bb_for_insn (); | |
4882 | ||
4883 | df_analyze (); | |
4884 | ||
4885 | /* Doloop optimization. */ | |
4886 | xtensa_reorg_loops (); | |
4887 | } | |
4888 | ||
590e2636 MF |
4889 | /* Update register usage after having seen the compiler flags. */ |
4890 | ||
4891 | static void | |
4892 | xtensa_conditional_register_usage (void) | |
4893 | { | |
4894 | unsigned i, c_mask; | |
4895 | ||
4896 | c_mask = TARGET_WINDOWED_ABI ? (1 << 1) : (1 << 2); | |
4897 | ||
4898 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
4899 | { | |
4900 | /* Set/reset conditionally defined registers from | |
4901 | CALL_USED_REGISTERS initializer. */ | |
4902 | if (call_used_regs[i] > 1) | |
4903 | call_used_regs[i] = !!(call_used_regs[i] & c_mask); | |
4904 | } | |
4905 | ||
4906 | /* Remove hard FP register from the preferred reload registers set. */ | |
4907 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)RL_REGS], | |
4908 | HARD_FRAME_POINTER_REGNUM); | |
4909 | } | |
4910 | ||
4911 | /* Map hard register number to register class */ | |
4912 | ||
4913 | enum reg_class xtensa_regno_to_class (int regno) | |
4914 | { | |
4915 | static const enum reg_class regno_to_class[FIRST_PSEUDO_REGISTER] = | |
4916 | { | |
4917 | RL_REGS, SP_REG, RL_REGS, RL_REGS, | |
4918 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4919 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4920 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4921 | AR_REGS, AR_REGS, BR_REGS, | |
4922 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4923 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4924 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4925 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4926 | ACC_REG, | |
4927 | }; | |
4928 | ||
4929 | if (regno == HARD_FRAME_POINTER_REGNUM) | |
4930 | return GR_REGS; | |
4931 | else | |
4932 | return regno_to_class[regno]; | |
4933 | } | |
4934 | ||
58e17cf8 RS |
4935 | /* Implement TARGET_CONSTANT_ALIGNMENT. Align string constants and |
4936 | constructors to at least a word boundary. The typical use of this | |
4937 | macro is to increase alignment for string constants to be word | |
4938 | aligned so that 'strcpy' calls that copy constants can be done | |
4939 | inline. */ | |
4940 | ||
4941 | static HOST_WIDE_INT | |
4942 | xtensa_constant_alignment (const_tree exp, HOST_WIDE_INT align) | |
4943 | { | |
4944 | if ((TREE_CODE (exp) == STRING_CST || TREE_CODE (exp) == CONSTRUCTOR) | |
4945 | && !optimize_size) | |
4946 | return MAX (align, BITS_PER_WORD); | |
4947 | return align; | |
4948 | } | |
4949 | ||
f50c32fa MF |
4950 | static bool |
4951 | xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) | |
4952 | { | |
4953 | gcc_assert (from == ARG_POINTER_REGNUM || from == FRAME_POINTER_REGNUM); | |
4954 | ||
4955 | /* If we need a frame pointer, ARG_POINTER_REGNUM and FRAME_POINTER_REGNUM | |
4956 | can only eliminate to HARD_FRAME_POINTER_REGNUM. */ | |
4957 | return to == HARD_FRAME_POINTER_REGNUM | |
4958 | || (!frame_pointer_needed && to == STACK_POINTER_REGNUM); | |
4959 | } | |
4960 | ||
2a31c321 RS |
4961 | /* Implement TARGET_STARTING_FRAME_OFFSET. */ |
4962 | ||
4963 | static HOST_WIDE_INT | |
4964 | xtensa_starting_frame_offset (void) | |
4965 | { | |
4966 | if (FRAME_GROWS_DOWNWARD) | |
4967 | return 0; | |
4968 | return crtl->outgoing_args_size; | |
4969 | } | |
4970 | ||
8c9ee176 MF |
4971 | /* Implement TARGET_ASAN_SHADOW_OFFSET. */ |
4972 | ||
4973 | static unsigned HOST_WIDE_INT | |
4974 | xtensa_asan_shadow_offset (void) | |
4975 | { | |
4976 | return HOST_WIDE_INT_UC (0x10000000); | |
4977 | } | |
4978 | ||
43b0c56f TJJS |
4979 | /* Implement TARGET_FUNCTION_OK_FOR_SIBCALL. */ |
4980 | static bool | |
4981 | xtensa_function_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED, tree exp ATTRIBUTE_UNUSED) | |
4982 | { | |
4983 | /* Do not allow sibcalls when windowed registers ABI is in effect. */ | |
4984 | if (TARGET_WINDOWED_ABI) | |
4985 | return false; | |
4986 | ||
4987 | return true; | |
4988 | } | |
4989 | ||
936efcac TJJS |
4990 | /* Implement TARGET_CONSTANT_OK_FOR_CPROP_P. */ |
4991 | static bool | |
4992 | xtensa_constant_ok_for_cprop_p (const_rtx x) | |
4993 | { | |
4994 | if (CONST_INT_P (x) && ! xtensa_simm12b (INTVAL (x))) | |
4995 | return false; | |
4996 | ||
4997 | return true; | |
4998 | } | |
4999 | ||
b7641550 MF |
5000 | static rtx |
5001 | xtensa_delegitimize_address (rtx op) | |
5002 | { | |
5003 | switch (GET_CODE (op)) | |
5004 | { | |
5005 | case CONST: | |
5006 | return xtensa_delegitimize_address (XEXP (op, 0)); | |
5007 | ||
5008 | case UNSPEC: | |
5009 | if (XINT (op, 1) == UNSPEC_PLT) | |
5010 | return XVECEXP(op, 0, 0); | |
5011 | break; | |
5012 | ||
5013 | default: | |
5014 | break; | |
5015 | } | |
5016 | return op; | |
5017 | } | |
5018 | ||
e2500fed | 5019 | #include "gt-xtensa.h" |