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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; | |
03984308 BW |
105 | }; |
106 | ||
107 | /* Vector, indexed by hard register number, which contains 1 for a | |
108 | register that is allowable in a candidate for leaf function | |
638db43e | 109 | treatment. */ |
03984308 BW |
110 | |
111 | const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER] = | |
112 | { | |
113 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
114 | 1, 1, 1, | |
115 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
116 | 1 | |
117 | }; | |
118 | ||
c5387660 | 119 | static void xtensa_option_override (void); |
ffbc8796 BW |
120 | static enum internal_test map_test_to_internal_test (enum rtx_code); |
121 | static rtx gen_int_relational (enum rtx_code, rtx, rtx, int *); | |
122 | static rtx gen_float_relational (enum rtx_code, rtx, rtx); | |
ef4bddc2 | 123 | static rtx gen_conditional_move (enum rtx_code, machine_mode, rtx, rtx); |
ffbc8796 | 124 | static rtx fixup_subreg_mem (rtx); |
ffbc8796 | 125 | static struct machine_function * xtensa_init_machine_status (void); |
6a7a462c | 126 | static rtx xtensa_legitimize_tls_address (rtx); |
ef4bddc2 | 127 | static rtx xtensa_legitimize_address (rtx, rtx, machine_mode); |
5bfed9a9 | 128 | static bool xtensa_mode_dependent_address_p (const_rtx, addr_space_t); |
586de218 | 129 | static bool xtensa_return_in_msb (const_tree); |
ffbc8796 | 130 | static void printx (FILE *, signed int); |
4c45af42 | 131 | static rtx xtensa_builtin_saveregs (void); |
ef4bddc2 | 132 | static bool xtensa_legitimate_address_p (machine_mode, rtx, bool); |
ffbc8796 BW |
133 | static unsigned int xtensa_multibss_section_type_flags (tree, const char *, |
134 | int) ATTRIBUTE_UNUSED; | |
ef4bddc2 | 135 | static section *xtensa_select_rtx_section (machine_mode, rtx, |
d6b5193b | 136 | unsigned HOST_WIDE_INT); |
e548c9df | 137 | static bool xtensa_rtx_costs (rtx, machine_mode, int, int, int *, bool); |
ccd02e73 | 138 | static int xtensa_insn_cost (rtx_insn *, bool); |
ef4bddc2 | 139 | static int xtensa_register_move_cost (machine_mode, reg_class_t, |
5378dda2 | 140 | reg_class_t); |
ef4bddc2 | 141 | static int xtensa_memory_move_cost (machine_mode, reg_class_t, bool); |
c35d187f | 142 | static tree xtensa_build_builtin_va_list (void); |
586de218 | 143 | static bool xtensa_return_in_memory (const_tree, const_tree); |
726a989a RB |
144 | static tree xtensa_gimplify_va_arg_expr (tree, tree, gimple_seq *, |
145 | gimple_seq *); | |
6930c98c RS |
146 | static void xtensa_function_arg_advance (cumulative_args_t, |
147 | const function_arg_info &); | |
6783fdb7 | 148 | static rtx xtensa_function_arg (cumulative_args_t, const function_arg_info &); |
d5cc9181 | 149 | static rtx xtensa_function_incoming_arg (cumulative_args_t, |
6783fdb7 | 150 | const function_arg_info &); |
e2b2d01e | 151 | static rtx xtensa_function_value (const_tree, const_tree, bool); |
ef4bddc2 | 152 | static rtx xtensa_libcall_value (machine_mode, const_rtx); |
dde8a3a4 | 153 | static bool xtensa_function_value_regno_p (const unsigned int); |
ef4bddc2 | 154 | static unsigned int xtensa_function_arg_boundary (machine_mode, |
c2ed6cf8 | 155 | const_tree); |
09fa8841 | 156 | static void xtensa_init_builtins (void); |
f311c3b4 | 157 | static tree xtensa_fold_builtin (tree, int, tree *, bool); |
ef4bddc2 | 158 | static rtx xtensa_expand_builtin (tree, rtx, rtx, machine_mode, int); |
9d0b1619 | 159 | static void xtensa_va_start (tree, rtx); |
b52b1749 | 160 | static bool xtensa_frame_pointer_required (void); |
2b4fa409 | 161 | static rtx xtensa_static_chain (const_tree, bool); |
3c1229cb RH |
162 | static void xtensa_asm_trampoline_template (FILE *); |
163 | static void xtensa_trampoline_init (rtx, tree, rtx); | |
2ac6bb04 | 164 | static bool xtensa_output_addr_const_extra (FILE *, rtx); |
ef4bddc2 | 165 | static bool xtensa_cannot_force_const_mem (machine_mode, rtx); |
b64a1b53 | 166 | |
a6e508f9 AS |
167 | static reg_class_t xtensa_preferred_reload_class (rtx, reg_class_t); |
168 | static reg_class_t xtensa_preferred_output_reload_class (rtx, reg_class_t); | |
169 | static reg_class_t xtensa_secondary_reload (bool, rtx, reg_class_t, | |
ef4bddc2 | 170 | machine_mode, |
a6e508f9 AS |
171 | struct secondary_reload_info *); |
172 | ||
a1a79768 | 173 | static bool constantpool_address_p (const_rtx addr); |
ef4bddc2 | 174 | static bool xtensa_legitimate_constant_p (machine_mode, rtx); |
6383386a FY |
175 | static void xtensa_reorg (void); |
176 | static bool xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
177 | unsigned int, bool); | |
178 | static const char *xtensa_invalid_within_doloop (const rtx_insn *); | |
a1a79768 | 179 | |
d9886a9e | 180 | static bool xtensa_member_type_forces_blk (const_tree, |
ef4bddc2 | 181 | machine_mode mode); |
d9886a9e | 182 | |
590e2636 | 183 | static void xtensa_conditional_register_usage (void); |
c43f4279 | 184 | static unsigned int xtensa_hard_regno_nregs (unsigned int, machine_mode); |
f939c3e6 | 185 | static bool xtensa_hard_regno_mode_ok (unsigned int, machine_mode); |
99e1629f | 186 | static bool xtensa_modes_tieable_p (machine_mode, machine_mode); |
58e17cf8 | 187 | static HOST_WIDE_INT xtensa_constant_alignment (const_tree, HOST_WIDE_INT); |
f50c32fa MF |
188 | static bool xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, |
189 | const int to); | |
2a31c321 | 190 | static HOST_WIDE_INT xtensa_starting_frame_offset (void); |
8c9ee176 | 191 | static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void); |
03984308 | 192 | |
b7641550 MF |
193 | static rtx xtensa_delegitimize_address (rtx); |
194 | ||
590e2636 | 195 | \f |
03984308 BW |
196 | |
197 | /* These hooks specify assembly directives for creating certain kinds | |
198 | of integer object. */ | |
199 | ||
200 | #undef TARGET_ASM_ALIGNED_SI_OP | |
201 | #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t" | |
202 | ||
b64a1b53 RH |
203 | #undef TARGET_ASM_SELECT_RTX_SECTION |
204 | #define TARGET_ASM_SELECT_RTX_SECTION xtensa_select_rtx_section | |
03984308 | 205 | |
506d7b68 PB |
206 | #undef TARGET_LEGITIMIZE_ADDRESS |
207 | #define TARGET_LEGITIMIZE_ADDRESS xtensa_legitimize_address | |
a1a79768 AS |
208 | #undef TARGET_MODE_DEPENDENT_ADDRESS_P |
209 | #define TARGET_MODE_DEPENDENT_ADDRESS_P xtensa_mode_dependent_address_p | |
506d7b68 | 210 | |
5378dda2 AS |
211 | #undef TARGET_REGISTER_MOVE_COST |
212 | #define TARGET_REGISTER_MOVE_COST xtensa_register_move_cost | |
213 | #undef TARGET_MEMORY_MOVE_COST | |
214 | #define TARGET_MEMORY_MOVE_COST xtensa_memory_move_cost | |
3c50106f RH |
215 | #undef TARGET_RTX_COSTS |
216 | #define TARGET_RTX_COSTS xtensa_rtx_costs | |
ccd02e73 TJJS |
217 | #undef TARGET_INSN_COST |
218 | #define TARGET_INSN_COST xtensa_insn_cost | |
dcefdf67 | 219 | #undef TARGET_ADDRESS_COST |
b413068c | 220 | #define TARGET_ADDRESS_COST hook_int_rtx_mode_as_bool_0 |
3c50106f | 221 | |
d9886a9e L |
222 | #undef TARGET_MEMBER_TYPE_FORCES_BLK |
223 | #define TARGET_MEMBER_TYPE_FORCES_BLK xtensa_member_type_forces_blk | |
224 | ||
c35d187f RH |
225 | #undef TARGET_BUILD_BUILTIN_VA_LIST |
226 | #define TARGET_BUILD_BUILTIN_VA_LIST xtensa_build_builtin_va_list | |
227 | ||
d7bd8aeb JJ |
228 | #undef TARGET_EXPAND_BUILTIN_VA_START |
229 | #define TARGET_EXPAND_BUILTIN_VA_START xtensa_va_start | |
230 | ||
cde0f3fd PB |
231 | #undef TARGET_PROMOTE_FUNCTION_MODE |
232 | #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote | |
4c45af42 | 233 | #undef TARGET_PROMOTE_PROTOTYPES |
586de218 | 234 | #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true |
4c45af42 | 235 | |
4c45af42 KH |
236 | #undef TARGET_RETURN_IN_MEMORY |
237 | #define TARGET_RETURN_IN_MEMORY xtensa_return_in_memory | |
e2b2d01e AS |
238 | #undef TARGET_FUNCTION_VALUE |
239 | #define TARGET_FUNCTION_VALUE xtensa_function_value | |
dde8a3a4 AS |
240 | #undef TARGET_LIBCALL_VALUE |
241 | #define TARGET_LIBCALL_VALUE xtensa_libcall_value | |
242 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
243 | #define TARGET_FUNCTION_VALUE_REGNO_P xtensa_function_value_regno_p | |
244 | ||
42ba5130 | 245 | #undef TARGET_SPLIT_COMPLEX_ARG |
3101faab | 246 | #define TARGET_SPLIT_COMPLEX_ARG hook_bool_const_tree_true |
fe984136 RH |
247 | #undef TARGET_MUST_PASS_IN_STACK |
248 | #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size | |
626a4b31 NF |
249 | #undef TARGET_FUNCTION_ARG_ADVANCE |
250 | #define TARGET_FUNCTION_ARG_ADVANCE xtensa_function_arg_advance | |
251 | #undef TARGET_FUNCTION_ARG | |
252 | #define TARGET_FUNCTION_ARG xtensa_function_arg | |
253 | #undef TARGET_FUNCTION_INCOMING_ARG | |
254 | #define TARGET_FUNCTION_INCOMING_ARG xtensa_function_incoming_arg | |
c2ed6cf8 NF |
255 | #undef TARGET_FUNCTION_ARG_BOUNDARY |
256 | #define TARGET_FUNCTION_ARG_BOUNDARY xtensa_function_arg_boundary | |
4c45af42 KH |
257 | |
258 | #undef TARGET_EXPAND_BUILTIN_SAVEREGS | |
259 | #define TARGET_EXPAND_BUILTIN_SAVEREGS xtensa_builtin_saveregs | |
85d53c1d RH |
260 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
261 | #define TARGET_GIMPLIFY_VA_ARG_EXPR xtensa_gimplify_va_arg_expr | |
4c45af42 | 262 | |
6e5ff6e7 BW |
263 | #undef TARGET_RETURN_IN_MSB |
264 | #define TARGET_RETURN_IN_MSB xtensa_return_in_msb | |
265 | ||
09fa8841 BW |
266 | #undef TARGET_INIT_BUILTINS |
267 | #define TARGET_INIT_BUILTINS xtensa_init_builtins | |
268 | #undef TARGET_FOLD_BUILTIN | |
269 | #define TARGET_FOLD_BUILTIN xtensa_fold_builtin | |
270 | #undef TARGET_EXPAND_BUILTIN | |
271 | #define TARGET_EXPAND_BUILTIN xtensa_expand_builtin | |
272 | ||
a6e508f9 AS |
273 | #undef TARGET_PREFERRED_RELOAD_CLASS |
274 | #define TARGET_PREFERRED_RELOAD_CLASS xtensa_preferred_reload_class | |
275 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
276 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS xtensa_preferred_output_reload_class | |
277 | ||
37fbe8a3 BW |
278 | #undef TARGET_SECONDARY_RELOAD |
279 | #define TARGET_SECONDARY_RELOAD xtensa_secondary_reload | |
280 | ||
6a7a462c | 281 | #undef TARGET_HAVE_TLS |
e46dad5d | 282 | #define TARGET_HAVE_TLS HAVE_AS_TLS |
6a7a462c BW |
283 | |
284 | #undef TARGET_CANNOT_FORCE_CONST_MEM | |
fbbf66e7 | 285 | #define TARGET_CANNOT_FORCE_CONST_MEM xtensa_cannot_force_const_mem |
6a7a462c | 286 | |
d81db636 SB |
287 | #undef TARGET_LRA_P |
288 | #define TARGET_LRA_P hook_bool_void_false | |
289 | ||
c6c3dba9 PB |
290 | #undef TARGET_LEGITIMATE_ADDRESS_P |
291 | #define TARGET_LEGITIMATE_ADDRESS_P xtensa_legitimate_address_p | |
292 | ||
b52b1749 AS |
293 | #undef TARGET_FRAME_POINTER_REQUIRED |
294 | #define TARGET_FRAME_POINTER_REQUIRED xtensa_frame_pointer_required | |
295 | ||
2b4fa409 RH |
296 | #undef TARGET_STATIC_CHAIN |
297 | #define TARGET_STATIC_CHAIN xtensa_static_chain | |
3c1229cb RH |
298 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
299 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE xtensa_asm_trampoline_template | |
300 | #undef TARGET_TRAMPOLINE_INIT | |
301 | #define TARGET_TRAMPOLINE_INIT xtensa_trampoline_init | |
302 | ||
c5387660 JM |
303 | #undef TARGET_OPTION_OVERRIDE |
304 | #define TARGET_OPTION_OVERRIDE xtensa_option_override | |
305 | ||
2ac6bb04 AS |
306 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
307 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA xtensa_output_addr_const_extra | |
308 | ||
1a627b35 RS |
309 | #undef TARGET_LEGITIMATE_CONSTANT_P |
310 | #define TARGET_LEGITIMATE_CONSTANT_P xtensa_legitimate_constant_p | |
311 | ||
6383386a FY |
312 | #undef TARGET_MACHINE_DEPENDENT_REORG |
313 | #define TARGET_MACHINE_DEPENDENT_REORG xtensa_reorg | |
314 | ||
315 | #undef TARGET_CAN_USE_DOLOOP_P | |
316 | #define TARGET_CAN_USE_DOLOOP_P xtensa_can_use_doloop_p | |
317 | ||
318 | #undef TARGET_INVALID_WITHIN_DOLOOP | |
319 | #define TARGET_INVALID_WITHIN_DOLOOP xtensa_invalid_within_doloop | |
320 | ||
590e2636 MF |
321 | #undef TARGET_CONDITIONAL_REGISTER_USAGE |
322 | #define TARGET_CONDITIONAL_REGISTER_USAGE xtensa_conditional_register_usage | |
323 | ||
c43f4279 RS |
324 | #undef TARGET_HARD_REGNO_NREGS |
325 | #define TARGET_HARD_REGNO_NREGS xtensa_hard_regno_nregs | |
f939c3e6 RS |
326 | #undef TARGET_HARD_REGNO_MODE_OK |
327 | #define TARGET_HARD_REGNO_MODE_OK xtensa_hard_regno_mode_ok | |
328 | ||
99e1629f RS |
329 | #undef TARGET_MODES_TIEABLE_P |
330 | #define TARGET_MODES_TIEABLE_P xtensa_modes_tieable_p | |
331 | ||
58e17cf8 RS |
332 | #undef TARGET_CONSTANT_ALIGNMENT |
333 | #define TARGET_CONSTANT_ALIGNMENT xtensa_constant_alignment | |
334 | ||
f50c32fa MF |
335 | #undef TARGET_CAN_ELIMINATE |
336 | #define TARGET_CAN_ELIMINATE xtensa_can_eliminate | |
337 | ||
2a31c321 RS |
338 | #undef TARGET_STARTING_FRAME_OFFSET |
339 | #define TARGET_STARTING_FRAME_OFFSET xtensa_starting_frame_offset | |
340 | ||
8c9ee176 MF |
341 | #undef TARGET_ASAN_SHADOW_OFFSET |
342 | #define TARGET_ASAN_SHADOW_OFFSET xtensa_asan_shadow_offset | |
343 | ||
c6579387 MF |
344 | #undef TARGET_HAVE_SPECULATION_SAFE_VALUE |
345 | #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed | |
346 | ||
b7641550 MF |
347 | #undef TARGET_DELEGITIMIZE_ADDRESS |
348 | #define TARGET_DELEGITIMIZE_ADDRESS xtensa_delegitimize_address | |
349 | ||
b64a1b53 | 350 | struct gcc_target targetm = TARGET_INITIALIZER; |
03984308 | 351 | |
887af464 BW |
352 | \f |
353 | /* Functions to test Xtensa immediate operand validity. */ | |
03984308 | 354 | |
8eb1bc5c BW |
355 | bool |
356 | xtensa_simm8 (HOST_WIDE_INT v) | |
357 | { | |
9b251fe2 | 358 | return IN_RANGE (v, -128, 127); |
8eb1bc5c BW |
359 | } |
360 | ||
361 | ||
362 | bool | |
363 | xtensa_simm8x256 (HOST_WIDE_INT v) | |
364 | { | |
9b251fe2 | 365 | return (v & 255) == 0 && IN_RANGE (v, -32768, 32512); |
8eb1bc5c BW |
366 | } |
367 | ||
368 | ||
369 | bool | |
370 | xtensa_simm12b (HOST_WIDE_INT v) | |
371 | { | |
9b251fe2 | 372 | return IN_RANGE (v, -2048, 2047); |
8eb1bc5c BW |
373 | } |
374 | ||
375 | ||
376 | static bool | |
377 | xtensa_uimm8 (HOST_WIDE_INT v) | |
378 | { | |
9b251fe2 | 379 | return IN_RANGE (v, 0, 255); |
8eb1bc5c BW |
380 | } |
381 | ||
382 | ||
383 | static bool | |
384 | xtensa_uimm8x2 (HOST_WIDE_INT v) | |
385 | { | |
9b251fe2 | 386 | return (v & 1) == 0 && IN_RANGE (v, 0, 510); |
8eb1bc5c BW |
387 | } |
388 | ||
389 | ||
390 | static bool | |
391 | xtensa_uimm8x4 (HOST_WIDE_INT v) | |
392 | { | |
9b251fe2 | 393 | return (v & 3) == 0 && IN_RANGE (v, 0, 1020); |
8eb1bc5c BW |
394 | } |
395 | ||
396 | ||
397 | static bool | |
398 | xtensa_b4const (HOST_WIDE_INT v) | |
03984308 BW |
399 | { |
400 | switch (v) | |
401 | { | |
8eb1bc5c BW |
402 | case -1: |
403 | case 1: | |
03984308 BW |
404 | case 2: |
405 | case 3: | |
406 | case 4: | |
407 | case 5: | |
408 | case 6: | |
409 | case 7: | |
410 | case 8: | |
411 | case 10: | |
412 | case 12: | |
413 | case 16: | |
414 | case 32: | |
415 | case 64: | |
416 | case 128: | |
417 | case 256: | |
8eb1bc5c | 418 | return true; |
03984308 | 419 | } |
8eb1bc5c | 420 | return false; |
03984308 BW |
421 | } |
422 | ||
03984308 | 423 | |
8eb1bc5c BW |
424 | bool |
425 | xtensa_b4const_or_zero (HOST_WIDE_INT v) | |
03984308 | 426 | { |
8eb1bc5c BW |
427 | if (v == 0) |
428 | return true; | |
429 | return xtensa_b4const (v); | |
03984308 BW |
430 | } |
431 | ||
03984308 | 432 | |
8eb1bc5c BW |
433 | bool |
434 | xtensa_b4constu (HOST_WIDE_INT v) | |
03984308 BW |
435 | { |
436 | switch (v) | |
437 | { | |
8eb1bc5c BW |
438 | case 32768: |
439 | case 65536: | |
03984308 BW |
440 | case 2: |
441 | case 3: | |
442 | case 4: | |
443 | case 5: | |
444 | case 6: | |
445 | case 7: | |
446 | case 8: | |
447 | case 10: | |
448 | case 12: | |
449 | case 16: | |
450 | case 32: | |
451 | case 64: | |
452 | case 128: | |
453 | case 256: | |
8eb1bc5c | 454 | return true; |
03984308 | 455 | } |
8eb1bc5c | 456 | return false; |
03984308 BW |
457 | } |
458 | ||
03984308 | 459 | |
8eb1bc5c BW |
460 | bool |
461 | xtensa_mask_immediate (HOST_WIDE_INT v) | |
03984308 | 462 | { |
b753405a | 463 | return IN_RANGE (exact_log2 (v + 1), 1, 16); |
03984308 BW |
464 | } |
465 | ||
03984308 | 466 | |
03984308 | 467 | /* This is just like the standard true_regnum() function except that it |
638db43e | 468 | works even when reg_renumber is not initialized. */ |
03984308 BW |
469 | |
470 | int | |
ffbc8796 | 471 | xt_true_regnum (rtx x) |
03984308 BW |
472 | { |
473 | if (GET_CODE (x) == REG) | |
474 | { | |
475 | if (reg_renumber | |
476 | && REGNO (x) >= FIRST_PSEUDO_REGISTER | |
477 | && reg_renumber[REGNO (x)] >= 0) | |
478 | return reg_renumber[REGNO (x)]; | |
479 | return REGNO (x); | |
480 | } | |
481 | if (GET_CODE (x) == SUBREG) | |
482 | { | |
483 | int base = xt_true_regnum (SUBREG_REG (x)); | |
484 | if (base >= 0 && base < FIRST_PSEUDO_REGISTER) | |
485 | return base + subreg_regno_offset (REGNO (SUBREG_REG (x)), | |
486 | GET_MODE (SUBREG_REG (x)), | |
487 | SUBREG_BYTE (x), GET_MODE (x)); | |
488 | } | |
489 | return -1; | |
490 | } | |
491 | ||
492 | ||
03984308 | 493 | int |
ef4bddc2 | 494 | xtensa_valid_move (machine_mode mode, rtx *operands) |
03984308 | 495 | { |
a8cacfd2 BW |
496 | /* Either the destination or source must be a register, and the |
497 | MAC16 accumulator doesn't count. */ | |
498 | ||
499 | if (register_operand (operands[0], mode)) | |
500 | { | |
501 | int dst_regnum = xt_true_regnum (operands[0]); | |
502 | ||
a024f514 MF |
503 | if (xtensa_tls_referenced_p (operands[1])) |
504 | return FALSE; | |
505 | ||
638db43e | 506 | /* The stack pointer can only be assigned with a MOVSP opcode. */ |
a8cacfd2 | 507 | if (dst_regnum == STACK_POINTER_REGNUM) |
590e2636 MF |
508 | return !TARGET_WINDOWED_ABI |
509 | || (mode == SImode | |
510 | && register_operand (operands[1], mode) | |
511 | && !ACC_REG_P (xt_true_regnum (operands[1]))); | |
a8cacfd2 BW |
512 | |
513 | if (!ACC_REG_P (dst_regnum)) | |
514 | return true; | |
515 | } | |
3437320b | 516 | if (register_operand (operands[1], mode)) |
a8cacfd2 BW |
517 | { |
518 | int src_regnum = xt_true_regnum (operands[1]); | |
519 | if (!ACC_REG_P (src_regnum)) | |
520 | return true; | |
521 | } | |
03984308 BW |
522 | return FALSE; |
523 | } | |
524 | ||
525 | ||
03984308 | 526 | int |
ffbc8796 | 527 | smalloffset_mem_p (rtx op) |
03984308 BW |
528 | { |
529 | if (GET_CODE (op) == MEM) | |
530 | { | |
531 | rtx addr = XEXP (op, 0); | |
532 | if (GET_CODE (addr) == REG) | |
da1f39e4 | 533 | return BASE_REG_P (addr, 0); |
03984308 BW |
534 | if (GET_CODE (addr) == PLUS) |
535 | { | |
536 | rtx offset = XEXP (addr, 0); | |
8eb1bc5c | 537 | HOST_WIDE_INT val; |
03984308 BW |
538 | if (GET_CODE (offset) != CONST_INT) |
539 | offset = XEXP (addr, 1); | |
540 | if (GET_CODE (offset) != CONST_INT) | |
541 | return FALSE; | |
8eb1bc5c BW |
542 | |
543 | val = INTVAL (offset); | |
9b251fe2 | 544 | return (val & 3) == 0 && IN_RANGE (val, 0, 60); |
03984308 BW |
545 | } |
546 | } | |
547 | return FALSE; | |
548 | } | |
549 | ||
550 | ||
a1a79768 AS |
551 | static bool |
552 | constantpool_address_p (const_rtx addr) | |
03984308 | 553 | { |
a1a79768 | 554 | const_rtx sym = addr; |
03984308 BW |
555 | |
556 | if (GET_CODE (addr) == CONST) | |
557 | { | |
558 | rtx offset; | |
559 | ||
3bbc2af6 | 560 | /* Only handle (PLUS (SYM, OFFSET)) form. */ |
03984308 BW |
561 | addr = XEXP (addr, 0); |
562 | if (GET_CODE (addr) != PLUS) | |
a1a79768 | 563 | return false; |
03984308 | 564 | |
3bbc2af6 | 565 | /* Make sure the address is word aligned. */ |
03984308 | 566 | offset = XEXP (addr, 1); |
a1a79768 | 567 | if ((!CONST_INT_P (offset)) |
03984308 | 568 | || ((INTVAL (offset) & 3) != 0)) |
a1a79768 | 569 | return false; |
03984308 BW |
570 | |
571 | sym = XEXP (addr, 0); | |
572 | } | |
573 | ||
574 | if ((GET_CODE (sym) == SYMBOL_REF) | |
575 | && CONSTANT_POOL_ADDRESS_P (sym)) | |
a1a79768 AS |
576 | return true; |
577 | return false; | |
03984308 BW |
578 | } |
579 | ||
580 | ||
581 | int | |
ffbc8796 | 582 | constantpool_mem_p (rtx op) |
03984308 | 583 | { |
63694bdd BW |
584 | if (GET_CODE (op) == SUBREG) |
585 | op = SUBREG_REG (op); | |
03984308 BW |
586 | if (GET_CODE (op) == MEM) |
587 | return constantpool_address_p (XEXP (op, 0)); | |
588 | return FALSE; | |
589 | } | |
590 | ||
591 | ||
6a7a462c BW |
592 | /* Return TRUE if X is a thread-local symbol. */ |
593 | ||
594 | static bool | |
595 | xtensa_tls_symbol_p (rtx x) | |
596 | { | |
e46dad5d | 597 | if (! targetm.have_tls) |
6a7a462c BW |
598 | return false; |
599 | ||
600 | return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0; | |
601 | } | |
602 | ||
603 | ||
03984308 | 604 | void |
ffbc8796 | 605 | xtensa_extend_reg (rtx dst, rtx src) |
03984308 BW |
606 | { |
607 | rtx temp = gen_reg_rtx (SImode); | |
608 | rtx shift = GEN_INT (BITS_PER_WORD - GET_MODE_BITSIZE (GET_MODE (src))); | |
609 | ||
3bbc2af6 | 610 | /* Generate paradoxical subregs as needed so that the modes match. */ |
03984308 BW |
611 | src = simplify_gen_subreg (SImode, src, GET_MODE (src), 0); |
612 | dst = simplify_gen_subreg (SImode, dst, GET_MODE (dst), 0); | |
613 | ||
614 | emit_insn (gen_ashlsi3 (temp, src, shift)); | |
615 | emit_insn (gen_ashrsi3 (dst, temp, shift)); | |
616 | } | |
617 | ||
618 | ||
8eb1bc5c | 619 | bool |
ef4bddc2 | 620 | xtensa_mem_offset (unsigned v, machine_mode mode) |
03984308 BW |
621 | { |
622 | switch (mode) | |
623 | { | |
4e10a5a7 | 624 | case E_BLKmode: |
03984308 BW |
625 | /* Handle the worst case for block moves. See xtensa_expand_block_move |
626 | where we emit an optimized block move operation if the block can be | |
627 | moved in < "move_ratio" pieces. The worst case is when the block is | |
628 | aligned but has a size of (3 mod 4) (does this happen?) so that the | |
638db43e | 629 | last piece requires a byte load/store. */ |
f42f5a1b BW |
630 | return (xtensa_uimm8 (v) |
631 | && xtensa_uimm8 (v + MOVE_MAX * LARGEST_MOVE_RATIO)); | |
03984308 | 632 | |
4e10a5a7 | 633 | case E_QImode: |
03984308 BW |
634 | return xtensa_uimm8 (v); |
635 | ||
4e10a5a7 | 636 | case E_HImode: |
03984308 BW |
637 | return xtensa_uimm8x2 (v); |
638 | ||
738ae6ee | 639 | case E_DImode: |
4e10a5a7 | 640 | case E_DFmode: |
03984308 BW |
641 | return (xtensa_uimm8x4 (v) && xtensa_uimm8x4 (v + 4)); |
642 | ||
643 | default: | |
644 | break; | |
645 | } | |
646 | ||
647 | return xtensa_uimm8x4 (v); | |
648 | } | |
649 | ||
650 | ||
ffbc8796 | 651 | /* Make normal rtx_code into something we can index from an array. */ |
03984308 BW |
652 | |
653 | static enum internal_test | |
ffbc8796 | 654 | map_test_to_internal_test (enum rtx_code test_code) |
03984308 BW |
655 | { |
656 | enum internal_test test = ITEST_MAX; | |
657 | ||
658 | switch (test_code) | |
659 | { | |
660 | default: break; | |
661 | case EQ: test = ITEST_EQ; break; | |
662 | case NE: test = ITEST_NE; break; | |
663 | case GT: test = ITEST_GT; break; | |
664 | case GE: test = ITEST_GE; break; | |
665 | case LT: test = ITEST_LT; break; | |
666 | case LE: test = ITEST_LE; break; | |
667 | case GTU: test = ITEST_GTU; break; | |
668 | case GEU: test = ITEST_GEU; break; | |
669 | case LTU: test = ITEST_LTU; break; | |
670 | case LEU: test = ITEST_LEU; break; | |
671 | } | |
672 | ||
673 | return test; | |
674 | } | |
675 | ||
676 | ||
677 | /* Generate the code to compare two integer values. The return value is | |
638db43e | 678 | the comparison expression. */ |
03984308 BW |
679 | |
680 | static rtx | |
ffbc8796 BW |
681 | gen_int_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
682 | rtx cmp0, /* first operand to compare */ | |
683 | rtx cmp1, /* second operand to compare */ | |
684 | int *p_invert /* whether branch needs to reverse test */) | |
03984308 | 685 | { |
ffbc8796 BW |
686 | struct cmp_info |
687 | { | |
03984308 | 688 | enum rtx_code test_code; /* test code to use in insn */ |
8eb1bc5c | 689 | bool (*const_range_p) (HOST_WIDE_INT); /* range check function */ |
03984308 BW |
690 | int const_add; /* constant to add (convert LE -> LT) */ |
691 | int reverse_regs; /* reverse registers in test */ | |
692 | int invert_const; /* != 0 if invert value if cmp1 is constant */ | |
693 | int invert_reg; /* != 0 if invert value if cmp1 is register */ | |
694 | int unsignedp; /* != 0 for unsigned comparisons. */ | |
695 | }; | |
696 | ||
697 | static struct cmp_info info[ (int)ITEST_MAX ] = { | |
698 | ||
8eb1bc5c BW |
699 | { EQ, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* EQ */ |
700 | { NE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* NE */ | |
03984308 | 701 | |
8eb1bc5c BW |
702 | { LT, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* GT */ |
703 | { GE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* GE */ | |
704 | { LT, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* LT */ | |
705 | { GE, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* LE */ | |
03984308 BW |
706 | |
707 | { LTU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* GTU */ | |
708 | { GEU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* GEU */ | |
709 | { LTU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* LTU */ | |
710 | { GEU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* LEU */ | |
711 | }; | |
712 | ||
713 | enum internal_test test; | |
ef4bddc2 | 714 | machine_mode mode; |
03984308 BW |
715 | struct cmp_info *p_info; |
716 | ||
717 | test = map_test_to_internal_test (test_code); | |
177b6be0 | 718 | gcc_assert (test != ITEST_MAX); |
03984308 BW |
719 | |
720 | p_info = &info[ (int)test ]; | |
721 | ||
722 | mode = GET_MODE (cmp0); | |
723 | if (mode == VOIDmode) | |
724 | mode = GET_MODE (cmp1); | |
725 | ||
726 | /* Make sure we can handle any constants given to us. */ | |
727 | if (GET_CODE (cmp1) == CONST_INT) | |
728 | { | |
729 | HOST_WIDE_INT value = INTVAL (cmp1); | |
730 | unsigned HOST_WIDE_INT uvalue = (unsigned HOST_WIDE_INT)value; | |
731 | ||
732 | /* if the immediate overflows or does not fit in the immediate field, | |
733 | spill it to a register */ | |
734 | ||
735 | if ((p_info->unsignedp ? | |
736 | (uvalue + p_info->const_add > uvalue) : | |
737 | (value + p_info->const_add > value)) != (p_info->const_add > 0)) | |
738 | { | |
739 | cmp1 = force_reg (mode, cmp1); | |
740 | } | |
741 | else if (!(p_info->const_range_p) (value + p_info->const_add)) | |
742 | { | |
743 | cmp1 = force_reg (mode, cmp1); | |
744 | } | |
745 | } | |
746 | else if ((GET_CODE (cmp1) != REG) && (GET_CODE (cmp1) != SUBREG)) | |
747 | { | |
748 | cmp1 = force_reg (mode, cmp1); | |
749 | } | |
750 | ||
751 | /* See if we need to invert the result. */ | |
752 | *p_invert = ((GET_CODE (cmp1) == CONST_INT) | |
753 | ? p_info->invert_const | |
754 | : p_info->invert_reg); | |
755 | ||
756 | /* Comparison to constants, may involve adding 1 to change a LT into LE. | |
757 | Comparison between two registers, may involve switching operands. */ | |
758 | if (GET_CODE (cmp1) == CONST_INT) | |
759 | { | |
760 | if (p_info->const_add != 0) | |
761 | cmp1 = GEN_INT (INTVAL (cmp1) + p_info->const_add); | |
762 | ||
763 | } | |
764 | else if (p_info->reverse_regs) | |
765 | { | |
766 | rtx temp = cmp0; | |
767 | cmp0 = cmp1; | |
768 | cmp1 = temp; | |
769 | } | |
770 | ||
1c563bed | 771 | return gen_rtx_fmt_ee (p_info->test_code, VOIDmode, cmp0, cmp1); |
03984308 BW |
772 | } |
773 | ||
774 | ||
775 | /* Generate the code to compare two float values. The return value is | |
638db43e | 776 | the comparison expression. */ |
03984308 BW |
777 | |
778 | static rtx | |
ffbc8796 BW |
779 | gen_float_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
780 | rtx cmp0, /* first operand to compare */ | |
781 | rtx cmp1 /* second operand to compare */) | |
03984308 | 782 | { |
ffbc8796 | 783 | rtx (*gen_fn) (rtx, rtx, rtx); |
03984308 BW |
784 | rtx brtmp; |
785 | int reverse_regs, invert; | |
786 | ||
787 | switch (test_code) | |
788 | { | |
789 | case EQ: reverse_regs = 0; invert = 0; gen_fn = gen_seq_sf; break; | |
790 | case NE: reverse_regs = 0; invert = 1; gen_fn = gen_seq_sf; break; | |
791 | case LE: reverse_regs = 0; invert = 0; gen_fn = gen_sle_sf; break; | |
792 | case GT: reverse_regs = 1; invert = 0; gen_fn = gen_slt_sf; break; | |
793 | case LT: reverse_regs = 0; invert = 0; gen_fn = gen_slt_sf; break; | |
794 | case GE: reverse_regs = 1; invert = 0; gen_fn = gen_sle_sf; break; | |
ff779f98 BW |
795 | case UNEQ: reverse_regs = 0; invert = 0; gen_fn = gen_suneq_sf; break; |
796 | case LTGT: reverse_regs = 0; invert = 1; gen_fn = gen_suneq_sf; break; | |
797 | case UNLE: reverse_regs = 0; invert = 0; gen_fn = gen_sunle_sf; break; | |
798 | case UNGT: reverse_regs = 1; invert = 0; gen_fn = gen_sunlt_sf; break; | |
799 | case UNLT: reverse_regs = 0; invert = 0; gen_fn = gen_sunlt_sf; break; | |
800 | case UNGE: reverse_regs = 1; invert = 0; gen_fn = gen_sunle_sf; break; | |
801 | case UNORDERED: | |
802 | reverse_regs = 0; invert = 0; gen_fn = gen_sunordered_sf; break; | |
803 | case ORDERED: | |
804 | reverse_regs = 0; invert = 1; gen_fn = gen_sunordered_sf; break; | |
633e4eb4 | 805 | default: |
1c563bed | 806 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 BW |
807 | reverse_regs = 0; invert = 0; gen_fn = 0; /* avoid compiler warnings */ |
808 | } | |
809 | ||
810 | if (reverse_regs) | |
811 | { | |
812 | rtx temp = cmp0; | |
813 | cmp0 = cmp1; | |
814 | cmp1 = temp; | |
815 | } | |
816 | ||
817 | brtmp = gen_rtx_REG (CCmode, FPCC_REGNUM); | |
818 | emit_insn (gen_fn (brtmp, cmp0, cmp1)); | |
819 | ||
1c563bed | 820 | return gen_rtx_fmt_ee (invert ? EQ : NE, VOIDmode, brtmp, const0_rtx); |
03984308 BW |
821 | } |
822 | ||
823 | ||
824 | void | |
ef4bddc2 | 825 | xtensa_expand_conditional_branch (rtx *operands, machine_mode mode) |
03984308 | 826 | { |
f90b7a5a PB |
827 | enum rtx_code test_code = GET_CODE (operands[0]); |
828 | rtx cmp0 = operands[1]; | |
829 | rtx cmp1 = operands[2]; | |
03984308 BW |
830 | rtx cmp; |
831 | int invert; | |
832 | rtx label1, label2; | |
833 | ||
f90b7a5a | 834 | switch (mode) |
03984308 | 835 | { |
4e10a5a7 | 836 | case E_DFmode: |
03984308 | 837 | default: |
1c563bed | 838 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 | 839 | |
4e10a5a7 | 840 | case E_SImode: |
03984308 BW |
841 | invert = FALSE; |
842 | cmp = gen_int_relational (test_code, cmp0, cmp1, &invert); | |
843 | break; | |
844 | ||
4e10a5a7 | 845 | case E_SFmode: |
03984308 | 846 | if (!TARGET_HARD_FLOAT) |
da1f39e4 BW |
847 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, |
848 | cmp0, cmp1)); | |
03984308 BW |
849 | invert = FALSE; |
850 | cmp = gen_float_relational (test_code, cmp0, cmp1); | |
851 | break; | |
852 | } | |
853 | ||
854 | /* Generate the branch. */ | |
855 | ||
f90b7a5a | 856 | label1 = gen_rtx_LABEL_REF (VOIDmode, operands[3]); |
03984308 BW |
857 | label2 = pc_rtx; |
858 | ||
859 | if (invert) | |
860 | { | |
861 | label2 = label1; | |
862 | label1 = pc_rtx; | |
863 | } | |
864 | ||
f7df4a84 | 865 | emit_jump_insn (gen_rtx_SET (pc_rtx, |
03984308 BW |
866 | gen_rtx_IF_THEN_ELSE (VOIDmode, cmp, |
867 | label1, | |
868 | label2))); | |
869 | } | |
870 | ||
871 | ||
872 | static rtx | |
ef4bddc2 | 873 | gen_conditional_move (enum rtx_code code, machine_mode mode, |
f90b7a5a | 874 | rtx op0, rtx op1) |
03984308 | 875 | { |
f90b7a5a | 876 | if (mode == SImode) |
03984308 | 877 | { |
f90b7a5a PB |
878 | rtx cmp; |
879 | ||
03984308 BW |
880 | /* Jump optimization calls get_condition() which canonicalizes |
881 | comparisons like (GE x <const>) to (GT x <const-1>). | |
882 | Transform those comparisons back to GE, since that is the | |
883 | comparison supported in Xtensa. We shouldn't have to | |
884 | transform <LE x const> comparisons, because neither | |
885 | xtensa_expand_conditional_branch() nor get_condition() will | |
638db43e | 886 | produce them. */ |
03984308 BW |
887 | |
888 | if ((code == GT) && (op1 == constm1_rtx)) | |
889 | { | |
890 | code = GE; | |
891 | op1 = const0_rtx; | |
892 | } | |
bd1cd0d0 | 893 | cmp = gen_rtx_fmt_ee (code, VOIDmode, pc_rtx, const0_rtx); |
03984308 BW |
894 | |
895 | if (boolean_operator (cmp, VOIDmode)) | |
896 | { | |
3bbc2af6 | 897 | /* Swap the operands to make const0 second. */ |
03984308 BW |
898 | if (op0 == const0_rtx) |
899 | { | |
900 | op0 = op1; | |
901 | op1 = const0_rtx; | |
902 | } | |
903 | ||
3bbc2af6 | 904 | /* If not comparing against zero, emit a comparison (subtract). */ |
03984308 BW |
905 | if (op1 != const0_rtx) |
906 | { | |
907 | op0 = expand_binop (SImode, sub_optab, op0, op1, | |
908 | 0, 0, OPTAB_LIB_WIDEN); | |
909 | op1 = const0_rtx; | |
910 | } | |
911 | } | |
912 | else if (branch_operator (cmp, VOIDmode)) | |
913 | { | |
3bbc2af6 | 914 | /* Swap the operands to make const0 second. */ |
03984308 BW |
915 | if (op0 == const0_rtx) |
916 | { | |
917 | op0 = op1; | |
918 | op1 = const0_rtx; | |
919 | ||
920 | switch (code) | |
921 | { | |
922 | case LT: code = GE; break; | |
923 | case GE: code = LT; break; | |
177b6be0 | 924 | default: gcc_unreachable (); |
03984308 BW |
925 | } |
926 | } | |
927 | ||
928 | if (op1 != const0_rtx) | |
929 | return 0; | |
930 | } | |
931 | else | |
932 | return 0; | |
933 | ||
1c563bed | 934 | return gen_rtx_fmt_ee (code, VOIDmode, op0, op1); |
03984308 BW |
935 | } |
936 | ||
f90b7a5a | 937 | if (TARGET_HARD_FLOAT && mode == SFmode) |
03984308 BW |
938 | return gen_float_relational (code, op0, op1); |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | ||
944 | int | |
ffbc8796 | 945 | xtensa_expand_conditional_move (rtx *operands, int isflt) |
03984308 | 946 | { |
f90b7a5a PB |
947 | rtx dest = operands[0]; |
948 | rtx cmp = operands[1]; | |
ef4bddc2 | 949 | machine_mode cmp_mode = GET_MODE (XEXP (cmp, 0)); |
ffbc8796 | 950 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 951 | |
f90b7a5a PB |
952 | if (!(cmp = gen_conditional_move (GET_CODE (cmp), cmp_mode, |
953 | XEXP (cmp, 0), XEXP (cmp, 1)))) | |
03984308 BW |
954 | return 0; |
955 | ||
956 | if (isflt) | |
f90b7a5a | 957 | gen_fn = (cmp_mode == SImode |
03984308 BW |
958 | ? gen_movsfcc_internal0 |
959 | : gen_movsfcc_internal1); | |
960 | else | |
f90b7a5a | 961 | gen_fn = (cmp_mode == SImode |
03984308 BW |
962 | ? gen_movsicc_internal0 |
963 | : gen_movsicc_internal1); | |
964 | ||
f90b7a5a | 965 | emit_insn (gen_fn (dest, XEXP (cmp, 0), operands[2], operands[3], cmp)); |
03984308 BW |
966 | return 1; |
967 | } | |
968 | ||
969 | ||
970 | int | |
ef4bddc2 | 971 | xtensa_expand_scc (rtx operands[4], machine_mode cmp_mode) |
03984308 BW |
972 | { |
973 | rtx dest = operands[0]; | |
f90b7a5a | 974 | rtx cmp; |
03984308 | 975 | rtx one_tmp, zero_tmp; |
ffbc8796 | 976 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 977 | |
f90b7a5a PB |
978 | if (!(cmp = gen_conditional_move (GET_CODE (operands[1]), cmp_mode, |
979 | operands[2], operands[3]))) | |
03984308 BW |
980 | return 0; |
981 | ||
982 | one_tmp = gen_reg_rtx (SImode); | |
983 | zero_tmp = gen_reg_rtx (SImode); | |
984 | emit_insn (gen_movsi (one_tmp, const_true_rtx)); | |
985 | emit_insn (gen_movsi (zero_tmp, const0_rtx)); | |
986 | ||
f90b7a5a | 987 | gen_fn = (cmp_mode == SImode |
03984308 BW |
988 | ? gen_movsicc_internal0 |
989 | : gen_movsicc_internal1); | |
990 | emit_insn (gen_fn (dest, XEXP (cmp, 0), one_tmp, zero_tmp, cmp)); | |
991 | return 1; | |
992 | } | |
993 | ||
994 | ||
633e4eb4 BW |
995 | /* Split OP[1] into OP[2,3] and likewise for OP[0] into OP[0,1]. MODE is |
996 | for the output, i.e., the input operands are twice as big as MODE. */ | |
997 | ||
998 | void | |
ef4bddc2 | 999 | xtensa_split_operand_pair (rtx operands[4], machine_mode mode) |
633e4eb4 BW |
1000 | { |
1001 | switch (GET_CODE (operands[1])) | |
1002 | { | |
1003 | case REG: | |
1004 | operands[3] = gen_rtx_REG (mode, REGNO (operands[1]) + 1); | |
1005 | operands[2] = gen_rtx_REG (mode, REGNO (operands[1])); | |
1006 | break; | |
1007 | ||
1008 | case MEM: | |
1009 | operands[3] = adjust_address (operands[1], mode, GET_MODE_SIZE (mode)); | |
1010 | operands[2] = adjust_address (operands[1], mode, 0); | |
1011 | break; | |
1012 | ||
1013 | case CONST_INT: | |
1014 | case CONST_DOUBLE: | |
1015 | split_double (operands[1], &operands[2], &operands[3]); | |
1016 | break; | |
1017 | ||
1018 | default: | |
177b6be0 | 1019 | gcc_unreachable (); |
633e4eb4 BW |
1020 | } |
1021 | ||
1022 | switch (GET_CODE (operands[0])) | |
1023 | { | |
1024 | case REG: | |
1025 | operands[1] = gen_rtx_REG (mode, REGNO (operands[0]) + 1); | |
1026 | operands[0] = gen_rtx_REG (mode, REGNO (operands[0])); | |
1027 | break; | |
1028 | ||
1029 | case MEM: | |
1030 | operands[1] = adjust_address (operands[0], mode, GET_MODE_SIZE (mode)); | |
1031 | operands[0] = adjust_address (operands[0], mode, 0); | |
1032 | break; | |
1033 | ||
1034 | default: | |
177b6be0 | 1035 | gcc_unreachable (); |
633e4eb4 BW |
1036 | } |
1037 | } | |
1038 | ||
1039 | ||
03984308 | 1040 | /* Emit insns to move operands[1] into operands[0]. |
03984308 BW |
1041 | Return 1 if we have written out everything that needs to be done to |
1042 | do the move. Otherwise, return 0 and the caller will emit the move | |
1043 | normally. */ | |
1044 | ||
1045 | int | |
ef4bddc2 | 1046 | xtensa_emit_move_sequence (rtx *operands, machine_mode mode) |
03984308 | 1047 | { |
6a7a462c BW |
1048 | rtx src = operands[1]; |
1049 | ||
1050 | if (CONSTANT_P (src) | |
1051 | && (GET_CODE (src) != CONST_INT || ! xtensa_simm12b (INTVAL (src)))) | |
03984308 | 1052 | { |
6a7a462c BW |
1053 | rtx dst = operands[0]; |
1054 | ||
1055 | if (xtensa_tls_referenced_p (src)) | |
1056 | { | |
1057 | rtx addend = NULL; | |
1058 | ||
1059 | if (GET_CODE (src) == CONST && GET_CODE (XEXP (src, 0)) == PLUS) | |
1060 | { | |
1061 | addend = XEXP (XEXP (src, 0), 1); | |
1062 | src = XEXP (XEXP (src, 0), 0); | |
1063 | } | |
1064 | ||
1065 | src = xtensa_legitimize_tls_address (src); | |
1066 | if (addend) | |
1067 | { | |
1068 | src = gen_rtx_PLUS (mode, src, addend); | |
1069 | src = force_operand (src, dst); | |
1070 | } | |
1071 | emit_move_insn (dst, src); | |
1072 | return 1; | |
1073 | } | |
1074 | ||
a024f514 | 1075 | if (! TARGET_AUTO_LITPOOLS && ! TARGET_CONST16) |
6a7a462c | 1076 | { |
64a54505 TJJS |
1077 | /* Try to emit MOVI + SLLI sequence, that is smaller |
1078 | than L32R + literal. */ | |
b552c4e6 MF |
1079 | if (optimize_size && mode == SImode && CONST_INT_P (src) |
1080 | && register_operand (dst, mode)) | |
64a54505 TJJS |
1081 | { |
1082 | HOST_WIDE_INT srcval = INTVAL (src); | |
1083 | int shift = ctz_hwi (srcval); | |
1084 | ||
1085 | if (xtensa_simm12b (srcval >> shift)) | |
1086 | { | |
1087 | emit_move_insn (dst, GEN_INT (srcval >> shift)); | |
1088 | emit_insn (gen_ashlsi3_internal (dst, dst, GEN_INT (shift))); | |
1089 | return 1; | |
1090 | } | |
1091 | } | |
1092 | ||
6a7a462c BW |
1093 | src = force_const_mem (SImode, src); |
1094 | operands[1] = src; | |
1095 | } | |
f42f5a1b BW |
1096 | |
1097 | /* PC-relative loads are always SImode, and CONST16 is only | |
1098 | supported in the movsi pattern, so add a SUBREG for any other | |
1099 | (smaller) mode. */ | |
1100 | ||
1101 | if (mode != SImode) | |
1102 | { | |
6a7a462c | 1103 | if (register_operand (dst, mode)) |
f42f5a1b | 1104 | { |
6a7a462c | 1105 | emit_move_insn (simplify_gen_subreg (SImode, dst, mode, 0), src); |
f42f5a1b BW |
1106 | return 1; |
1107 | } | |
1108 | else | |
1109 | { | |
6a7a462c BW |
1110 | src = force_reg (SImode, src); |
1111 | src = gen_lowpart_SUBREG (mode, src); | |
1112 | operands[1] = src; | |
f42f5a1b BW |
1113 | } |
1114 | } | |
03984308 BW |
1115 | } |
1116 | ||
997b8b4d BW |
1117 | if (!(reload_in_progress | reload_completed) |
1118 | && !xtensa_valid_move (mode, operands)) | |
1119 | operands[1] = force_reg (mode, operands[1]); | |
03984308 | 1120 | |
997b8b4d | 1121 | operands[1] = xtensa_copy_incoming_a7 (operands[1]); |
03984308 BW |
1122 | |
1123 | /* During reload we don't want to emit (subreg:X (mem:Y)) since that | |
638db43e BW |
1124 | instruction won't be recognized after reload, so we remove the |
1125 | subreg and adjust mem accordingly. */ | |
03984308 BW |
1126 | if (reload_in_progress) |
1127 | { | |
1128 | operands[0] = fixup_subreg_mem (operands[0]); | |
1129 | operands[1] = fixup_subreg_mem (operands[1]); | |
1130 | } | |
1131 | return 0; | |
1132 | } | |
1133 | ||
f42f5a1b | 1134 | |
03984308 | 1135 | static rtx |
ffbc8796 | 1136 | fixup_subreg_mem (rtx x) |
03984308 BW |
1137 | { |
1138 | if (GET_CODE (x) == SUBREG | |
1139 | && GET_CODE (SUBREG_REG (x)) == REG | |
1140 | && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER) | |
1141 | { | |
1142 | rtx temp = | |
1143 | gen_rtx_SUBREG (GET_MODE (x), | |
f2034d06 | 1144 | reg_equiv_mem (REGNO (SUBREG_REG (x))), |
03984308 | 1145 | SUBREG_BYTE (x)); |
55a2c322 | 1146 | x = alter_subreg (&temp, true); |
03984308 BW |
1147 | } |
1148 | return x; | |
1149 | } | |
1150 | ||
1151 | ||
997b8b4d BW |
1152 | /* Check if an incoming argument in a7 is expected to be used soon and |
1153 | if OPND is a register or register pair that includes a7. If so, | |
1154 | create a new pseudo and copy a7 into that pseudo at the very | |
1155 | beginning of the function, followed by the special "set_frame_ptr" | |
1156 | unspec_volatile insn. The return value is either the original | |
1157 | operand, if it is not a7, or the new pseudo containing a copy of | |
1158 | the incoming argument. This is necessary because the register | |
1159 | allocator will ignore conflicts with a7 and may either assign some | |
1160 | other pseudo to a7 or use a7 as the hard_frame_pointer, clobbering | |
1161 | the incoming argument in a7. By copying the argument out of a7 as | |
1162 | the very first thing, and then immediately following that with an | |
1163 | unspec_volatile to keep the scheduler away, we should avoid any | |
1164 | problems. Putting the set_frame_ptr insn at the beginning, with | |
1165 | only the a7 copy before it, also makes it easier for the prologue | |
1166 | expander to initialize the frame pointer after the a7 copy and to | |
1167 | fix up the a7 copy to use the stack pointer instead of the frame | |
1168 | pointer. */ | |
58db834b | 1169 | |
997b8b4d BW |
1170 | rtx |
1171 | xtensa_copy_incoming_a7 (rtx opnd) | |
58db834b | 1172 | { |
997b8b4d BW |
1173 | rtx entry_insns = 0; |
1174 | rtx reg, tmp; | |
ef4bddc2 | 1175 | machine_mode mode; |
997b8b4d BW |
1176 | |
1177 | if (!cfun->machine->need_a7_copy) | |
1178 | return opnd; | |
1179 | ||
1180 | /* This function should never be called again once a7 has been copied. */ | |
177b6be0 | 1181 | gcc_assert (!cfun->machine->set_frame_ptr_insn); |
997b8b4d BW |
1182 | |
1183 | mode = GET_MODE (opnd); | |
1184 | ||
1185 | /* The operand using a7 may come in a later instruction, so just return | |
1186 | the original operand if it doesn't use a7. */ | |
1187 | reg = opnd; | |
1188 | if (GET_CODE (reg) == SUBREG) | |
58db834b | 1189 | { |
177b6be0 | 1190 | gcc_assert (SUBREG_BYTE (reg) == 0); |
997b8b4d BW |
1191 | reg = SUBREG_REG (reg); |
1192 | } | |
1193 | if (GET_CODE (reg) != REG | |
1194 | || REGNO (reg) > A7_REG | |
a93072ca | 1195 | || REGNO (reg) + hard_regno_nregs (A7_REG, mode) <= A7_REG) |
997b8b4d | 1196 | return opnd; |
e6aecf8e | 1197 | |
997b8b4d | 1198 | /* 1-word args will always be in a7; 2-word args in a6/a7. */ |
a93072ca | 1199 | gcc_assert (REGNO (reg) + hard_regno_nregs (A7_REG, mode) - 1 == A7_REG); |
58db834b | 1200 | |
997b8b4d | 1201 | cfun->machine->need_a7_copy = false; |
58db834b | 1202 | |
997b8b4d BW |
1203 | /* Copy a7 to a new pseudo at the function entry. Use gen_raw_REG to |
1204 | create the REG for a7 so that hard_frame_pointer_rtx is not used. */ | |
58db834b | 1205 | |
0d8442b8 | 1206 | start_sequence (); |
997b8b4d | 1207 | tmp = gen_reg_rtx (mode); |
58db834b | 1208 | |
997b8b4d BW |
1209 | switch (mode) |
1210 | { | |
4e10a5a7 RS |
1211 | case E_DFmode: |
1212 | case E_DImode: | |
b412869c BW |
1213 | /* Copy the value out of A7 here but keep the first word in A6 until |
1214 | after the set_frame_ptr insn. Otherwise, the register allocator | |
1215 | may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming | |
1216 | value. */ | |
997b8b4d BW |
1217 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), |
1218 | gen_raw_REG (SImode, A7_REG))); | |
1219 | break; | |
4e10a5a7 | 1220 | case E_SFmode: |
997b8b4d BW |
1221 | emit_insn (gen_movsf_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1222 | break; | |
4e10a5a7 | 1223 | case E_SImode: |
997b8b4d BW |
1224 | emit_insn (gen_movsi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1225 | break; | |
4e10a5a7 | 1226 | case E_HImode: |
997b8b4d BW |
1227 | emit_insn (gen_movhi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1228 | break; | |
4e10a5a7 | 1229 | case E_QImode: |
997b8b4d BW |
1230 | emit_insn (gen_movqi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1231 | break; | |
1232 | default: | |
177b6be0 | 1233 | gcc_unreachable (); |
58db834b BW |
1234 | } |
1235 | ||
997b8b4d | 1236 | cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); |
b412869c BW |
1237 | |
1238 | /* For DF and DI mode arguments, copy the incoming value in A6 now. */ | |
1239 | if (mode == DFmode || mode == DImode) | |
1240 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), | |
1241 | gen_rtx_REG (SImode, A7_REG - 1))); | |
997b8b4d BW |
1242 | entry_insns = get_insns (); |
1243 | end_sequence (); | |
1244 | ||
1245 | if (cfun->machine->vararg_a7) | |
1246 | { | |
0d8442b8 BW |
1247 | /* This is called from within builtin_saveregs, which will insert the |
1248 | saveregs code at the function entry, ahead of anything placed at | |
1249 | the function entry now. Instead, save the sequence to be inserted | |
1250 | at the beginning of the saveregs code. */ | |
1251 | cfun->machine->vararg_a7_copy = entry_insns; | |
997b8b4d BW |
1252 | } |
1253 | else | |
1254 | { | |
1255 | /* Put entry_insns after the NOTE that starts the function. If | |
1256 | this is inside a start_sequence, make the outer-level insn | |
1257 | chain current, so the code is placed at the start of the | |
1258 | function. */ | |
1259 | push_topmost_sequence (); | |
0d8442b8 BW |
1260 | /* Do not use entry_of_function() here. This is called from within |
1261 | expand_function_start, when the CFG still holds GIMPLE. */ | |
997b8b4d BW |
1262 | emit_insn_after (entry_insns, get_insns ()); |
1263 | pop_topmost_sequence (); | |
1264 | } | |
1265 | ||
1266 | return tmp; | |
58db834b BW |
1267 | } |
1268 | ||
1269 | ||
a46bbb5a BW |
1270 | /* Try to expand a block move operation to a sequence of RTL move |
1271 | instructions. If not optimizing, or if the block size is not a | |
1272 | constant, or if the block is too large, the expansion fails and GCC | |
1273 | falls back to calling memcpy(). | |
03984308 BW |
1274 | |
1275 | operands[0] is the destination | |
1276 | operands[1] is the source | |
1277 | operands[2] is the length | |
1278 | operands[3] is the alignment */ | |
1279 | ||
1280 | int | |
ffbc8796 | 1281 | xtensa_expand_block_move (rtx *operands) |
03984308 | 1282 | { |
ef4bddc2 | 1283 | static const machine_mode mode_from_align[] = |
7eda7cda RH |
1284 | { |
1285 | VOIDmode, QImode, HImode, VOIDmode, SImode, | |
1286 | }; | |
1287 | ||
1288 | rtx dst_mem = operands[0]; | |
1289 | rtx src_mem = operands[1]; | |
1290 | HOST_WIDE_INT bytes, align; | |
03984308 | 1291 | int num_pieces, move_ratio; |
7eda7cda | 1292 | rtx temp[2]; |
ef4bddc2 | 1293 | machine_mode mode[2]; |
7eda7cda RH |
1294 | int amount[2]; |
1295 | bool active[2]; | |
1296 | int phase = 0; | |
1297 | int next; | |
1298 | int offset_ld = 0; | |
1299 | int offset_st = 0; | |
1300 | rtx x; | |
03984308 | 1301 | |
3bbc2af6 | 1302 | /* If this is not a fixed size move, just call memcpy. */ |
03984308 BW |
1303 | if (!optimize || (GET_CODE (operands[2]) != CONST_INT)) |
1304 | return 0; | |
1305 | ||
7eda7cda RH |
1306 | bytes = INTVAL (operands[2]); |
1307 | align = INTVAL (operands[3]); | |
1308 | ||
3bbc2af6 | 1309 | /* Anything to move? */ |
03984308 | 1310 | if (bytes <= 0) |
7eda7cda | 1311 | return 0; |
03984308 BW |
1312 | |
1313 | if (align > MOVE_MAX) | |
1314 | align = MOVE_MAX; | |
1315 | ||
3bbc2af6 | 1316 | /* Decide whether to expand inline based on the optimization level. */ |
03984308 BW |
1317 | move_ratio = 4; |
1318 | if (optimize > 2) | |
1319 | move_ratio = LARGEST_MOVE_RATIO; | |
3397563a | 1320 | num_pieces = (bytes / align) + ((bytes % align + 1) / 2); |
7eda7cda | 1321 | if (num_pieces > move_ratio) |
03984308 BW |
1322 | return 0; |
1323 | ||
7eda7cda RH |
1324 | x = XEXP (dst_mem, 0); |
1325 | if (!REG_P (x)) | |
1326 | { | |
1327 | x = force_reg (Pmode, x); | |
1328 | dst_mem = replace_equiv_address (dst_mem, x); | |
1329 | } | |
03984308 | 1330 | |
7eda7cda RH |
1331 | x = XEXP (src_mem, 0); |
1332 | if (!REG_P (x)) | |
1333 | { | |
1334 | x = force_reg (Pmode, x); | |
1335 | src_mem = replace_equiv_address (src_mem, x); | |
1336 | } | |
03984308 | 1337 | |
7eda7cda | 1338 | active[0] = active[1] = false; |
03984308 | 1339 | |
7eda7cda | 1340 | do |
03984308 | 1341 | { |
7eda7cda RH |
1342 | next = phase; |
1343 | phase ^= 1; | |
03984308 | 1344 | |
7eda7cda | 1345 | if (bytes > 0) |
03984308 | 1346 | { |
7eda7cda | 1347 | int next_amount; |
03984308 | 1348 | |
7eda7cda RH |
1349 | next_amount = (bytes >= 4 ? 4 : (bytes >= 2 ? 2 : 1)); |
1350 | next_amount = MIN (next_amount, align); | |
03984308 | 1351 | |
7eda7cda RH |
1352 | amount[next] = next_amount; |
1353 | mode[next] = mode_from_align[next_amount]; | |
1354 | temp[next] = gen_reg_rtx (mode[next]); | |
03984308 | 1355 | |
7eda7cda | 1356 | x = adjust_address (src_mem, mode[next], offset_ld); |
3397563a | 1357 | emit_move_insn (temp[next], x); |
03984308 | 1358 | |
7eda7cda RH |
1359 | offset_ld += next_amount; |
1360 | bytes -= next_amount; | |
1361 | active[next] = true; | |
1362 | } | |
03984308 | 1363 | |
7eda7cda RH |
1364 | if (active[phase]) |
1365 | { | |
1366 | active[phase] = false; | |
3397563a | 1367 | |
7eda7cda | 1368 | x = adjust_address (dst_mem, mode[phase], offset_st); |
3397563a | 1369 | emit_move_insn (x, temp[phase]); |
03984308 | 1370 | |
7eda7cda RH |
1371 | offset_st += amount[phase]; |
1372 | } | |
03984308 | 1373 | } |
7eda7cda | 1374 | while (active[next]); |
03984308 | 1375 | |
7eda7cda | 1376 | return 1; |
03984308 BW |
1377 | } |
1378 | ||
1379 | ||
6454b4a8 TJJS |
1380 | /* Try to expand a block set operation to a sequence of RTL move |
1381 | instructions. If not optimizing, or if the block size is not a | |
1382 | constant, or if the block is too large, or if the value to | |
1383 | initialize the block with is not a constant, the expansion | |
1384 | fails and GCC falls back to calling memset(). | |
1385 | ||
1386 | operands[0] is the destination | |
1387 | operands[1] is the length | |
1388 | operands[2] is the initialization value | |
1389 | operands[3] is the alignment */ | |
1390 | ||
1391 | static int | |
1392 | xtensa_sizeof_MOVI (HOST_WIDE_INT imm) | |
1393 | { | |
1394 | return (TARGET_DENSITY && IN_RANGE (imm, -32, 95)) ? 2 : 3; | |
1395 | } | |
1396 | ||
1397 | int | |
1398 | xtensa_expand_block_set_unrolled_loop (rtx *operands) | |
1399 | { | |
1400 | rtx dst_mem = operands[0]; | |
1401 | HOST_WIDE_INT bytes, value, align; | |
1402 | int expand_len, funccall_len; | |
1403 | rtx x, reg; | |
1404 | int offset; | |
1405 | ||
1406 | if (!CONST_INT_P (operands[1]) || !CONST_INT_P (operands[2])) | |
1407 | return 0; | |
1408 | ||
1409 | bytes = INTVAL (operands[1]); | |
1410 | if (bytes <= 0) | |
1411 | return 0; | |
1412 | value = (int8_t)INTVAL (operands[2]); | |
1413 | align = INTVAL (operands[3]); | |
1414 | if (align > MOVE_MAX) | |
1415 | align = MOVE_MAX; | |
1416 | ||
1417 | /* Insn expansion: holding the init value. | |
1418 | Either MOV(.N) or L32R w/litpool. */ | |
1419 | if (align == 1) | |
1420 | expand_len = xtensa_sizeof_MOVI (value); | |
1421 | else if (value == 0 || value == -1) | |
1422 | expand_len = TARGET_DENSITY ? 2 : 3; | |
1423 | else | |
1424 | expand_len = 3 + 4; | |
1425 | /* Insn expansion: a series of aligned memory stores. | |
1426 | Consist of S8I, S16I or S32I(.N). */ | |
1427 | expand_len += (bytes / align) * (TARGET_DENSITY | |
1428 | && align == 4 ? 2 : 3); | |
1429 | /* Insn expansion: the remainder, sub-aligned memory stores. | |
1430 | A combination of S8I and S16I as needed. */ | |
1431 | expand_len += ((bytes % align + 1) / 2) * 3; | |
1432 | ||
1433 | /* Function call: preparing two arguments. */ | |
1434 | funccall_len = xtensa_sizeof_MOVI (value); | |
1435 | funccall_len += xtensa_sizeof_MOVI (bytes); | |
1436 | /* Function call: calling memset(). */ | |
1437 | funccall_len += TARGET_LONGCALLS ? (3 + 4 + 3) : 3; | |
1438 | ||
1439 | /* Apply expansion bonus (2x) if optimizing for speed. */ | |
1440 | if (optimize > 1 && !optimize_size) | |
1441 | funccall_len *= 2; | |
1442 | ||
1443 | /* Decide whether to expand or not, based on the sum of the length | |
1444 | of instructions. */ | |
1445 | if (expand_len > funccall_len) | |
1446 | return 0; | |
1447 | ||
1448 | x = XEXP (dst_mem, 0); | |
1449 | if (!REG_P (x)) | |
1450 | dst_mem = replace_equiv_address (dst_mem, force_reg (Pmode, x)); | |
1451 | switch (align) | |
1452 | { | |
1453 | case 1: | |
1454 | break; | |
1455 | case 2: | |
1456 | value = (int16_t)((uint8_t)value * 0x0101U); | |
1457 | break; | |
1458 | case 4: | |
1459 | value = (int32_t)((uint8_t)value * 0x01010101U); | |
1460 | break; | |
1461 | default: | |
1462 | gcc_unreachable (); | |
1463 | } | |
1464 | reg = force_reg (SImode, GEN_INT (value)); | |
1465 | ||
1466 | offset = 0; | |
1467 | do | |
1468 | { | |
1469 | int unit_size = MIN (bytes, align); | |
1470 | machine_mode unit_mode = (unit_size >= 4 ? SImode : | |
1471 | (unit_size >= 2 ? HImode : | |
1472 | QImode)); | |
1473 | unit_size = GET_MODE_SIZE (unit_mode); | |
1474 | ||
1475 | emit_move_insn (adjust_address (dst_mem, unit_mode, offset), | |
1476 | unit_mode == SImode ? reg | |
1477 | : convert_to_mode (unit_mode, reg, true)); | |
1478 | ||
1479 | offset += unit_size; | |
1480 | bytes -= unit_size; | |
1481 | } | |
1482 | while (bytes > 0); | |
1483 | ||
1484 | return 1; | |
1485 | } | |
1486 | ||
1487 | int | |
1488 | xtensa_expand_block_set_small_loop (rtx *operands) | |
1489 | { | |
fddf0e10 | 1490 | HOST_WIDE_INT bytes, value, align, count; |
6454b4a8 TJJS |
1491 | int expand_len, funccall_len; |
1492 | rtx x, dst, end, reg; | |
1493 | machine_mode unit_mode; | |
1494 | rtx_code_label *label; | |
1495 | ||
1496 | if (!CONST_INT_P (operands[1]) || !CONST_INT_P (operands[2])) | |
1497 | return 0; | |
1498 | ||
1499 | bytes = INTVAL (operands[1]); | |
1500 | if (bytes <= 0) | |
1501 | return 0; | |
1502 | value = (int8_t)INTVAL (operands[2]); | |
1503 | align = INTVAL (operands[3]); | |
1504 | if (align > MOVE_MAX) | |
1505 | align = MOVE_MAX; | |
1506 | ||
1507 | /* Totally-aligned block only. */ | |
1508 | if (bytes % align != 0) | |
1509 | return 0; | |
fddf0e10 | 1510 | count = bytes / align; |
6454b4a8 | 1511 | |
fddf0e10 TJJS |
1512 | /* If the Loop Option (zero-overhead looping) is configured and active, |
1513 | almost no restrictions about the length of the block. */ | |
1514 | if (! (TARGET_LOOPS && optimize)) | |
1515 | { | |
1516 | /* If 4-byte aligned, small loop substitution is almost optimal, | |
1517 | thus limited to only offset to the end address for ADDI/ADDMI | |
1518 | instruction. */ | |
1519 | if (align == 4 | |
1520 | && ! (bytes <= 127 || (bytes <= 32512 && bytes % 256 == 0))) | |
1521 | return 0; | |
6454b4a8 | 1522 | |
fddf0e10 TJJS |
1523 | /* If no 4-byte aligned, loop count should be treated as the |
1524 | constraint. */ | |
1525 | if (align != 4 | |
1526 | && count > ((optimize > 1 && !optimize_size) ? 8 : 15)) | |
1527 | return 0; | |
1528 | } | |
6454b4a8 TJJS |
1529 | |
1530 | /* Insn expansion: holding the init value. | |
1531 | Either MOV(.N) or L32R w/litpool. */ | |
1532 | if (align == 1) | |
1533 | expand_len = xtensa_sizeof_MOVI (value); | |
1534 | else if (value == 0 || value == -1) | |
1535 | expand_len = TARGET_DENSITY ? 2 : 3; | |
1536 | else | |
1537 | expand_len = 3 + 4; | |
fddf0e10 TJJS |
1538 | if (TARGET_LOOPS && optimize) /* zero-overhead looping */ |
1539 | { | |
1540 | /* Insn translation: Either MOV(.N) or L32R w/litpool for the | |
1541 | loop count. */ | |
1542 | expand_len += xtensa_simm12b (count) ? xtensa_sizeof_MOVI (count) | |
1543 | : 3 + 4; | |
1544 | /* Insn translation: LOOP, the zero-overhead looping setup | |
1545 | instruction. */ | |
1546 | expand_len += 3; | |
1547 | /* Insn expansion: the loop body instructions. | |
1548 | For store, one of S8I, S16I or S32I(.N). | |
1549 | For advance, ADDI(.N). */ | |
1550 | expand_len += (TARGET_DENSITY && align == 4 ? 2 : 3) | |
1551 | + (TARGET_DENSITY ? 2 : 3); | |
1552 | } | |
1553 | else /* NO zero-overhead looping */ | |
1554 | { | |
1555 | /* Insn expansion: Either ADDI(.N) or ADDMI for the end address. */ | |
1556 | expand_len += bytes > 127 ? 3 | |
1557 | : (TARGET_DENSITY && bytes <= 15) ? 2 : 3; | |
1558 | /* Insn expansion: the loop body and branch instruction. | |
1559 | For store, one of S8I, S16I or S32I(.N). | |
1560 | For advance, ADDI(.N). | |
1561 | For branch, BNE. */ | |
1562 | expand_len += (TARGET_DENSITY && align == 4 ? 2 : 3) | |
1563 | + (TARGET_DENSITY ? 2 : 3) + 3; | |
1564 | } | |
6454b4a8 TJJS |
1565 | |
1566 | /* Function call: preparing two arguments. */ | |
1567 | funccall_len = xtensa_sizeof_MOVI (value); | |
1568 | funccall_len += xtensa_sizeof_MOVI (bytes); | |
1569 | /* Function call: calling memset(). */ | |
1570 | funccall_len += TARGET_LONGCALLS ? (3 + 4 + 3) : 3; | |
1571 | ||
1572 | /* Apply expansion bonus (2x) if optimizing for speed. */ | |
1573 | if (optimize > 1 && !optimize_size) | |
1574 | funccall_len *= 2; | |
1575 | ||
1576 | /* Decide whether to expand or not, based on the sum of the length | |
1577 | of instructions. */ | |
1578 | if (expand_len > funccall_len) | |
1579 | return 0; | |
1580 | ||
1581 | x = XEXP (operands[0], 0); | |
1582 | if (!REG_P (x)) | |
1583 | x = XEXP (replace_equiv_address (operands[0], force_reg (Pmode, x)), 0); | |
1584 | dst = gen_reg_rtx (SImode); | |
1585 | emit_move_insn (dst, x); | |
1586 | end = gen_reg_rtx (SImode); | |
fddf0e10 TJJS |
1587 | if (TARGET_LOOPS && optimize) |
1588 | x = force_reg (SImode, operands[1] /* the length */); | |
1589 | else | |
1590 | x = operands[1]; | |
1591 | emit_insn (gen_addsi3 (end, dst, x)); | |
6454b4a8 TJJS |
1592 | switch (align) |
1593 | { | |
1594 | case 1: | |
1595 | unit_mode = QImode; | |
1596 | break; | |
1597 | case 2: | |
1598 | value = (int16_t)((uint8_t)value * 0x0101U); | |
1599 | unit_mode = HImode; | |
1600 | break; | |
1601 | case 4: | |
1602 | value = (int32_t)((uint8_t)value * 0x01010101U); | |
1603 | unit_mode = SImode; | |
1604 | break; | |
1605 | default: | |
1606 | gcc_unreachable (); | |
1607 | } | |
1608 | reg = force_reg (unit_mode, GEN_INT (value)); | |
1609 | ||
1610 | label = gen_label_rtx (); | |
1611 | emit_label (label); | |
1612 | emit_move_insn (gen_rtx_MEM (unit_mode, dst), reg); | |
1613 | emit_insn (gen_addsi3 (dst, dst, GEN_INT (align))); | |
1614 | emit_cmp_and_jump_insns (dst, end, NE, const0_rtx, SImode, true, label); | |
1615 | ||
1616 | return 1; | |
1617 | } | |
1618 | ||
1619 | ||
03984308 | 1620 | void |
ffbc8796 | 1621 | xtensa_expand_nonlocal_goto (rtx *operands) |
03984308 BW |
1622 | { |
1623 | rtx goto_handler = operands[1]; | |
1624 | rtx containing_fp = operands[3]; | |
1625 | ||
3bbc2af6 KH |
1626 | /* Generate a call to "__xtensa_nonlocal_goto" (in libgcc); the code |
1627 | is too big to generate in-line. */ | |
03984308 BW |
1628 | |
1629 | if (GET_CODE (containing_fp) != REG) | |
1630 | containing_fp = force_reg (Pmode, containing_fp); | |
1631 | ||
03984308 | 1632 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_nonlocal_goto"), |
db69559b | 1633 | LCT_NORMAL, VOIDmode, |
03984308 BW |
1634 | containing_fp, Pmode, |
1635 | goto_handler, Pmode); | |
1636 | } | |
1637 | ||
1638 | ||
e2500fed | 1639 | static struct machine_function * |
ffbc8796 | 1640 | xtensa_init_machine_status (void) |
03984308 | 1641 | { |
766090c2 | 1642 | return ggc_cleared_alloc<machine_function> (); |
03984308 BW |
1643 | } |
1644 | ||
1645 | ||
2a48b790 BW |
1646 | /* Shift VAL of mode MODE left by COUNT bits. */ |
1647 | ||
1648 | static inline rtx | |
ef4bddc2 | 1649 | xtensa_expand_mask_and_shift (rtx val, machine_mode mode, rtx count) |
2a48b790 BW |
1650 | { |
1651 | val = expand_simple_binop (SImode, AND, val, GEN_INT (GET_MODE_MASK (mode)), | |
1652 | NULL_RTX, 1, OPTAB_DIRECT); | |
1653 | return expand_simple_binop (SImode, ASHIFT, val, count, | |
1654 | NULL_RTX, 1, OPTAB_DIRECT); | |
1655 | } | |
1656 | ||
1657 | ||
1658 | /* Structure to hold the initial parameters for a compare_and_swap operation | |
1659 | in HImode and QImode. */ | |
1660 | ||
1661 | struct alignment_context | |
1662 | { | |
1663 | rtx memsi; /* SI aligned memory location. */ | |
1664 | rtx shift; /* Bit offset with regard to lsb. */ | |
1665 | rtx modemask; /* Mask of the HQImode shifted by SHIFT bits. */ | |
1666 | rtx modemaski; /* ~modemask */ | |
1667 | }; | |
1668 | ||
1669 | ||
1670 | /* Initialize structure AC for word access to HI and QI mode memory. */ | |
1671 | ||
1672 | static void | |
1673 | init_alignment_context (struct alignment_context *ac, rtx mem) | |
1674 | { | |
ef4bddc2 | 1675 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1676 | rtx byteoffset = NULL_RTX; |
1677 | bool aligned = (MEM_ALIGN (mem) >= GET_MODE_BITSIZE (SImode)); | |
1678 | ||
1679 | if (aligned) | |
1680 | ac->memsi = adjust_address (mem, SImode, 0); /* Memory is aligned. */ | |
1681 | else | |
1682 | { | |
1683 | /* Alignment is unknown. */ | |
1684 | rtx addr, align; | |
1685 | ||
1686 | /* Force the address into a register. */ | |
1687 | addr = force_reg (Pmode, XEXP (mem, 0)); | |
1688 | ||
1689 | /* Align it to SImode. */ | |
1690 | align = expand_simple_binop (Pmode, AND, addr, | |
1691 | GEN_INT (-GET_MODE_SIZE (SImode)), | |
1692 | NULL_RTX, 1, OPTAB_DIRECT); | |
1693 | /* Generate MEM. */ | |
1694 | ac->memsi = gen_rtx_MEM (SImode, align); | |
1695 | MEM_VOLATILE_P (ac->memsi) = MEM_VOLATILE_P (mem); | |
1696 | set_mem_alias_set (ac->memsi, ALIAS_SET_MEMORY_BARRIER); | |
1697 | set_mem_align (ac->memsi, GET_MODE_BITSIZE (SImode)); | |
1698 | ||
1699 | byteoffset = expand_simple_binop (Pmode, AND, addr, | |
1700 | GEN_INT (GET_MODE_SIZE (SImode) - 1), | |
1701 | NULL_RTX, 1, OPTAB_DIRECT); | |
1702 | } | |
1703 | ||
1704 | /* Calculate shiftcount. */ | |
1705 | if (TARGET_BIG_ENDIAN) | |
1706 | { | |
1707 | ac->shift = GEN_INT (GET_MODE_SIZE (SImode) - GET_MODE_SIZE (mode)); | |
1708 | if (!aligned) | |
1709 | ac->shift = expand_simple_binop (SImode, MINUS, ac->shift, byteoffset, | |
1710 | NULL_RTX, 1, OPTAB_DIRECT); | |
1711 | } | |
1712 | else | |
1713 | { | |
1714 | if (aligned) | |
1715 | ac->shift = NULL_RTX; | |
1716 | else | |
1717 | ac->shift = byteoffset; | |
1718 | } | |
1719 | ||
1720 | if (ac->shift != NULL_RTX) | |
1721 | { | |
1722 | /* Shift is the byte count, but we need the bitcount. */ | |
91767ed1 MF |
1723 | gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0); |
1724 | ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift, | |
1725 | GEN_INT (exact_log2 (BITS_PER_UNIT)), | |
2a48b790 BW |
1726 | NULL_RTX, 1, OPTAB_DIRECT); |
1727 | ac->modemask = expand_simple_binop (SImode, ASHIFT, | |
1728 | GEN_INT (GET_MODE_MASK (mode)), | |
1729 | ac->shift, | |
1730 | NULL_RTX, 1, OPTAB_DIRECT); | |
1731 | } | |
1732 | else | |
1733 | ac->modemask = GEN_INT (GET_MODE_MASK (mode)); | |
1734 | ||
1735 | ac->modemaski = expand_simple_unop (SImode, NOT, ac->modemask, NULL_RTX, 1); | |
1736 | } | |
1737 | ||
1738 | ||
1739 | /* Expand an atomic compare and swap operation for HImode and QImode. | |
1740 | MEM is the memory location, CMP the old value to compare MEM with | |
0a2aaacc | 1741 | and NEW_RTX the value to set if CMP == MEM. */ |
2a48b790 BW |
1742 | |
1743 | void | |
0a2aaacc | 1744 | xtensa_expand_compare_and_swap (rtx target, rtx mem, rtx cmp, rtx new_rtx) |
2a48b790 | 1745 | { |
ef4bddc2 | 1746 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1747 | struct alignment_context ac; |
1748 | rtx tmp, cmpv, newv, val; | |
1749 | rtx oldval = gen_reg_rtx (SImode); | |
1750 | rtx res = gen_reg_rtx (SImode); | |
240a513f DM |
1751 | rtx_code_label *csloop = gen_label_rtx (); |
1752 | rtx_code_label *csend = gen_label_rtx (); | |
2a48b790 BW |
1753 | |
1754 | init_alignment_context (&ac, mem); | |
1755 | ||
1756 | if (ac.shift != NULL_RTX) | |
1757 | { | |
1758 | cmp = xtensa_expand_mask_and_shift (cmp, mode, ac.shift); | |
0a2aaacc | 1759 | new_rtx = xtensa_expand_mask_and_shift (new_rtx, mode, ac.shift); |
2a48b790 BW |
1760 | } |
1761 | ||
1762 | /* Load the surrounding word into VAL with the MEM value masked out. */ | |
1763 | val = force_reg (SImode, expand_simple_binop (SImode, AND, ac.memsi, | |
1764 | ac.modemaski, NULL_RTX, 1, | |
1765 | OPTAB_DIRECT)); | |
1766 | emit_label (csloop); | |
1767 | ||
0a2aaacc | 1768 | /* Patch CMP and NEW_RTX into VAL at correct position. */ |
2a48b790 BW |
1769 | cmpv = force_reg (SImode, expand_simple_binop (SImode, IOR, cmp, val, |
1770 | NULL_RTX, 1, OPTAB_DIRECT)); | |
0a2aaacc | 1771 | newv = force_reg (SImode, expand_simple_binop (SImode, IOR, new_rtx, val, |
2a48b790 BW |
1772 | NULL_RTX, 1, OPTAB_DIRECT)); |
1773 | ||
1774 | /* Jump to end if we're done. */ | |
1775 | emit_insn (gen_sync_compare_and_swapsi (res, ac.memsi, cmpv, newv)); | |
1776 | emit_cmp_and_jump_insns (res, cmpv, EQ, const0_rtx, SImode, true, csend); | |
1777 | ||
1778 | /* Check for changes outside mode. */ | |
1779 | emit_move_insn (oldval, val); | |
1780 | tmp = expand_simple_binop (SImode, AND, res, ac.modemaski, | |
1781 | val, 1, OPTAB_DIRECT); | |
1782 | if (tmp != val) | |
1783 | emit_move_insn (val, tmp); | |
1784 | ||
1785 | /* Loop internal if so. */ | |
1786 | emit_cmp_and_jump_insns (oldval, val, NE, const0_rtx, SImode, true, csloop); | |
1787 | ||
1788 | emit_label (csend); | |
1789 | ||
1790 | /* Return the correct part of the bitfield. */ | |
1791 | convert_move (target, | |
1792 | (ac.shift == NULL_RTX ? res | |
1793 | : expand_simple_binop (SImode, LSHIFTRT, res, ac.shift, | |
1794 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1795 | 1); | |
1796 | } | |
1797 | ||
1798 | ||
1799 | /* Expand an atomic operation CODE of mode MODE (either HImode or QImode -- | |
1800 | the default expansion works fine for SImode). MEM is the memory location | |
1801 | and VAL the value to play with. If AFTER is true then store the value | |
1802 | MEM holds after the operation, if AFTER is false then store the value MEM | |
1803 | holds before the operation. If TARGET is zero then discard that value, else | |
1804 | store it to TARGET. */ | |
1805 | ||
1806 | void | |
1807 | xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val, | |
1808 | bool after) | |
1809 | { | |
ef4bddc2 | 1810 | machine_mode mode = GET_MODE (mem); |
2a48b790 | 1811 | struct alignment_context ac; |
240a513f | 1812 | rtx_code_label *csloop = gen_label_rtx (); |
2a48b790 BW |
1813 | rtx cmp, tmp; |
1814 | rtx old = gen_reg_rtx (SImode); | |
0a2aaacc | 1815 | rtx new_rtx = gen_reg_rtx (SImode); |
2a48b790 BW |
1816 | rtx orig = NULL_RTX; |
1817 | ||
1818 | init_alignment_context (&ac, mem); | |
1819 | ||
1820 | /* Prepare values before the compare-and-swap loop. */ | |
1821 | if (ac.shift != NULL_RTX) | |
1822 | val = xtensa_expand_mask_and_shift (val, mode, ac.shift); | |
1823 | switch (code) | |
1824 | { | |
1825 | case PLUS: | |
1826 | case MINUS: | |
1827 | orig = gen_reg_rtx (SImode); | |
1828 | convert_move (orig, val, 1); | |
1829 | break; | |
1830 | ||
1831 | case SET: | |
1832 | case IOR: | |
1833 | case XOR: | |
1834 | break; | |
1835 | ||
1836 | case MULT: /* NAND */ | |
1837 | case AND: | |
1838 | /* val = "11..1<val>11..1" */ | |
1839 | val = expand_simple_binop (SImode, XOR, val, ac.modemaski, | |
1840 | NULL_RTX, 1, OPTAB_DIRECT); | |
1841 | break; | |
1842 | ||
1843 | default: | |
1844 | gcc_unreachable (); | |
1845 | } | |
1846 | ||
1847 | /* Load full word. Subsequent loads are performed by S32C1I. */ | |
1848 | cmp = force_reg (SImode, ac.memsi); | |
1849 | ||
1850 | emit_label (csloop); | |
1851 | emit_move_insn (old, cmp); | |
1852 | ||
1853 | switch (code) | |
1854 | { | |
1855 | case PLUS: | |
1856 | case MINUS: | |
1857 | val = expand_simple_binop (SImode, code, old, orig, | |
1858 | NULL_RTX, 1, OPTAB_DIRECT); | |
1859 | val = expand_simple_binop (SImode, AND, val, ac.modemask, | |
1860 | NULL_RTX, 1, OPTAB_DIRECT); | |
1861 | /* FALLTHRU */ | |
1862 | case SET: | |
1863 | tmp = expand_simple_binop (SImode, AND, old, ac.modemaski, | |
1864 | NULL_RTX, 1, OPTAB_DIRECT); | |
1865 | tmp = expand_simple_binop (SImode, IOR, tmp, val, | |
0a2aaacc | 1866 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1867 | break; |
1868 | ||
1869 | case AND: | |
1870 | case IOR: | |
1871 | case XOR: | |
1872 | tmp = expand_simple_binop (SImode, code, old, val, | |
0a2aaacc | 1873 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1874 | break; |
1875 | ||
1876 | case MULT: /* NAND */ | |
2a17b239 | 1877 | tmp = expand_simple_binop (SImode, AND, old, val, |
2a48b790 | 1878 | NULL_RTX, 1, OPTAB_DIRECT); |
2a17b239 | 1879 | tmp = expand_simple_binop (SImode, XOR, tmp, ac.modemask, |
0a2aaacc | 1880 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1881 | break; |
1882 | ||
1883 | default: | |
1884 | gcc_unreachable (); | |
1885 | } | |
1886 | ||
0a2aaacc KG |
1887 | if (tmp != new_rtx) |
1888 | emit_move_insn (new_rtx, tmp); | |
1889 | emit_insn (gen_sync_compare_and_swapsi (cmp, ac.memsi, old, new_rtx)); | |
2a48b790 BW |
1890 | emit_cmp_and_jump_insns (cmp, old, NE, const0_rtx, SImode, true, csloop); |
1891 | ||
1892 | if (target) | |
1893 | { | |
0a2aaacc | 1894 | tmp = (after ? new_rtx : cmp); |
2a48b790 BW |
1895 | convert_move (target, |
1896 | (ac.shift == NULL_RTX ? tmp | |
1897 | : expand_simple_binop (SImode, LSHIFTRT, tmp, ac.shift, | |
1898 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1899 | 1); | |
1900 | } | |
1901 | } | |
1902 | ||
1903 | ||
03984308 | 1904 | void |
ffbc8796 | 1905 | xtensa_setup_frame_addresses (void) |
03984308 | 1906 | { |
b52b1749 | 1907 | /* Set flag to cause TARGET_FRAME_POINTER_REQUIRED to return true. */ |
03984308 BW |
1908 | cfun->machine->accesses_prev_frame = 1; |
1909 | ||
590e2636 MF |
1910 | if (TARGET_WINDOWED_ABI) |
1911 | emit_library_call | |
1912 | (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_libgcc_window_spill"), | |
db69559b | 1913 | LCT_NORMAL, VOIDmode); |
03984308 BW |
1914 | } |
1915 | ||
1916 | ||
638db43e BW |
1917 | /* Emit the assembly for the end of a zero-cost loop. Normally we just emit |
1918 | a comment showing where the end of the loop is. However, if there is a | |
03984308 | 1919 | label or a branch at the end of the loop then we need to place a nop |
638db43e | 1920 | there. If the loop ends with a label we need the nop so that branches |
839a4992 KH |
1921 | targeting that label will target the nop (and thus remain in the loop), |
1922 | instead of targeting the instruction after the loop (and thus exiting | |
638db43e | 1923 | the loop). If the loop ends with a branch, we need the nop in case the |
839a4992 | 1924 | branch is targeting a location inside the loop. When the branch |
03984308 BW |
1925 | executes it will cause the loop count to be decremented even if it is |
1926 | taken (because it is the last instruction in the loop), so we need to | |
1927 | nop after the branch to prevent the loop count from being decremented | |
638db43e | 1928 | when the branch is taken. */ |
03984308 BW |
1929 | |
1930 | void | |
240a513f | 1931 | xtensa_emit_loop_end (rtx_insn *insn, rtx *operands) |
03984308 BW |
1932 | { |
1933 | char done = 0; | |
1934 | ||
1935 | for (insn = PREV_INSN (insn); insn && !done; insn = PREV_INSN (insn)) | |
1936 | { | |
1937 | switch (GET_CODE (insn)) | |
1938 | { | |
1939 | case NOTE: | |
1940 | case BARRIER: | |
1941 | break; | |
1942 | ||
1943 | case CODE_LABEL: | |
0bd0703d | 1944 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1945 | done = 1; |
1946 | break; | |
1947 | ||
1948 | default: | |
1949 | { | |
1950 | rtx body = PATTERN (insn); | |
1951 | ||
b64925dc | 1952 | if (JUMP_P (body)) |
03984308 | 1953 | { |
0bd0703d | 1954 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1955 | done = 1; |
1956 | } | |
1957 | else if ((GET_CODE (body) != USE) | |
1958 | && (GET_CODE (body) != CLOBBER)) | |
1959 | done = 1; | |
1960 | } | |
1961 | break; | |
1962 | } | |
1963 | } | |
1964 | ||
6383386a | 1965 | output_asm_insn ("%1_LEND:", operands); |
03984308 BW |
1966 | } |
1967 | ||
1968 | ||
036a2b7a BW |
1969 | char * |
1970 | xtensa_emit_branch (bool inverted, bool immed, rtx *operands) | |
1971 | { | |
1972 | static char result[64]; | |
1973 | enum rtx_code code; | |
1974 | const char *op; | |
1975 | ||
1976 | code = GET_CODE (operands[3]); | |
1977 | switch (code) | |
1978 | { | |
1979 | case EQ: op = inverted ? "ne" : "eq"; break; | |
1980 | case NE: op = inverted ? "eq" : "ne"; break; | |
1981 | case LT: op = inverted ? "ge" : "lt"; break; | |
1982 | case GE: op = inverted ? "lt" : "ge"; break; | |
1983 | case LTU: op = inverted ? "geu" : "ltu"; break; | |
1984 | case GEU: op = inverted ? "ltu" : "geu"; break; | |
1985 | default: gcc_unreachable (); | |
1986 | } | |
1987 | ||
1988 | if (immed) | |
1989 | { | |
1990 | if (INTVAL (operands[1]) == 0) | |
1991 | sprintf (result, "b%sz%s\t%%0, %%2", op, | |
1992 | (TARGET_DENSITY && (code == EQ || code == NE)) ? ".n" : ""); | |
1993 | else | |
1994 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1995 | } | |
1996 | else | |
1997 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1998 | ||
1999 | return result; | |
2000 | } | |
2001 | ||
2002 | ||
2003 | char * | |
2004 | xtensa_emit_bit_branch (bool inverted, bool immed, rtx *operands) | |
2005 | { | |
2006 | static char result[64]; | |
2007 | const char *op; | |
2008 | ||
2009 | switch (GET_CODE (operands[3])) | |
2010 | { | |
2011 | case EQ: op = inverted ? "bs" : "bc"; break; | |
2012 | case NE: op = inverted ? "bc" : "bs"; break; | |
2013 | default: gcc_unreachable (); | |
2014 | } | |
2015 | ||
2016 | if (immed) | |
2017 | { | |
2018 | unsigned bitnum = INTVAL (operands[1]) & 0x1f; | |
2019 | operands[1] = GEN_INT (bitnum); | |
2020 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
2021 | } | |
2022 | else | |
2023 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
2024 | ||
2025 | return result; | |
2026 | } | |
2027 | ||
2028 | ||
2029 | char * | |
2030 | xtensa_emit_movcc (bool inverted, bool isfp, bool isbool, rtx *operands) | |
2031 | { | |
2032 | static char result[64]; | |
2033 | enum rtx_code code; | |
2034 | const char *op; | |
2035 | ||
2036 | code = GET_CODE (operands[4]); | |
2037 | if (isbool) | |
2038 | { | |
2039 | switch (code) | |
2040 | { | |
2041 | case EQ: op = inverted ? "t" : "f"; break; | |
2042 | case NE: op = inverted ? "f" : "t"; break; | |
2043 | default: gcc_unreachable (); | |
2044 | } | |
2045 | } | |
2046 | else | |
2047 | { | |
2048 | switch (code) | |
2049 | { | |
2050 | case EQ: op = inverted ? "nez" : "eqz"; break; | |
2051 | case NE: op = inverted ? "eqz" : "nez"; break; | |
2052 | case LT: op = inverted ? "gez" : "ltz"; break; | |
2053 | case GE: op = inverted ? "ltz" : "gez"; break; | |
2054 | default: gcc_unreachable (); | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | sprintf (result, "mov%s%s\t%%0, %%%d, %%1", | |
2059 | op, isfp ? ".s" : "", inverted ? 3 : 2); | |
2060 | return result; | |
2061 | } | |
2062 | ||
2063 | ||
03984308 | 2064 | char * |
ffbc8796 | 2065 | xtensa_emit_call (int callop, rtx *operands) |
03984308 | 2066 | { |
b64a1b53 | 2067 | static char result[64]; |
03984308 BW |
2068 | rtx tgt = operands[callop]; |
2069 | ||
2070 | if (GET_CODE (tgt) == CONST_INT) | |
3904010d MF |
2071 | sprintf (result, "call%d\t" HOST_WIDE_INT_PRINT_HEX, |
2072 | WINDOW_SIZE, INTVAL (tgt)); | |
03984308 | 2073 | else if (register_operand (tgt, VOIDmode)) |
590e2636 | 2074 | sprintf (result, "callx%d\t%%%d", WINDOW_SIZE, callop); |
03984308 | 2075 | else |
590e2636 | 2076 | sprintf (result, "call%d\t%%%d", WINDOW_SIZE, callop); |
03984308 BW |
2077 | |
2078 | return result; | |
2079 | } | |
2080 | ||
2081 | ||
da1f39e4 | 2082 | bool |
ef4bddc2 | 2083 | xtensa_legitimate_address_p (machine_mode mode, rtx addr, bool strict) |
da1f39e4 BW |
2084 | { |
2085 | /* Allow constant pool addresses. */ | |
2086 | if (mode != BLKmode && GET_MODE_SIZE (mode) >= UNITS_PER_WORD | |
6a7a462c BW |
2087 | && ! TARGET_CONST16 && constantpool_address_p (addr) |
2088 | && ! xtensa_tls_referenced_p (addr)) | |
da1f39e4 BW |
2089 | return true; |
2090 | ||
2091 | while (GET_CODE (addr) == SUBREG) | |
2092 | addr = SUBREG_REG (addr); | |
2093 | ||
2094 | /* Allow base registers. */ | |
2095 | if (GET_CODE (addr) == REG && BASE_REG_P (addr, strict)) | |
2096 | return true; | |
2097 | ||
2098 | /* Check for "register + offset" addressing. */ | |
2099 | if (GET_CODE (addr) == PLUS) | |
2100 | { | |
2101 | rtx xplus0 = XEXP (addr, 0); | |
2102 | rtx xplus1 = XEXP (addr, 1); | |
2103 | enum rtx_code code0; | |
2104 | enum rtx_code code1; | |
2105 | ||
2106 | while (GET_CODE (xplus0) == SUBREG) | |
2107 | xplus0 = SUBREG_REG (xplus0); | |
2108 | code0 = GET_CODE (xplus0); | |
2109 | ||
2110 | while (GET_CODE (xplus1) == SUBREG) | |
2111 | xplus1 = SUBREG_REG (xplus1); | |
2112 | code1 = GET_CODE (xplus1); | |
2113 | ||
2114 | /* Swap operands if necessary so the register is first. */ | |
2115 | if (code0 != REG && code1 == REG) | |
2116 | { | |
2117 | xplus0 = XEXP (addr, 1); | |
2118 | xplus1 = XEXP (addr, 0); | |
2119 | code0 = GET_CODE (xplus0); | |
2120 | code1 = GET_CODE (xplus1); | |
2121 | } | |
2122 | ||
2123 | if (code0 == REG && BASE_REG_P (xplus0, strict) | |
2124 | && code1 == CONST_INT | |
2125 | && xtensa_mem_offset (INTVAL (xplus1), mode)) | |
2126 | return true; | |
2127 | } | |
2128 | ||
2129 | return false; | |
2130 | } | |
2131 | ||
2132 | ||
6a7a462c BW |
2133 | /* Construct the SYMBOL_REF for the _TLS_MODULE_BASE_ symbol. */ |
2134 | ||
2135 | static GTY(()) rtx xtensa_tls_module_base_symbol; | |
2136 | ||
2137 | static rtx | |
2138 | xtensa_tls_module_base (void) | |
2139 | { | |
2140 | if (! xtensa_tls_module_base_symbol) | |
2141 | { | |
2142 | xtensa_tls_module_base_symbol = | |
2143 | gen_rtx_SYMBOL_REF (Pmode, "_TLS_MODULE_BASE_"); | |
2144 | SYMBOL_REF_FLAGS (xtensa_tls_module_base_symbol) | |
2145 | |= TLS_MODEL_GLOBAL_DYNAMIC << SYMBOL_FLAG_TLS_SHIFT; | |
2146 | } | |
2147 | ||
2148 | return xtensa_tls_module_base_symbol; | |
2149 | } | |
2150 | ||
2151 | ||
240a513f | 2152 | static rtx_insn * |
6a7a462c BW |
2153 | xtensa_call_tls_desc (rtx sym, rtx *retp) |
2154 | { | |
e1b8828b | 2155 | rtx fn, arg, a_io; |
240a513f | 2156 | rtx_insn *call_insn, *insns; |
6a7a462c BW |
2157 | |
2158 | start_sequence (); | |
2159 | fn = gen_reg_rtx (Pmode); | |
2160 | arg = gen_reg_rtx (Pmode); | |
e1b8828b | 2161 | a_io = gen_rtx_REG (Pmode, WINDOW_SIZE + 2); |
6a7a462c BW |
2162 | |
2163 | emit_insn (gen_tls_func (fn, sym)); | |
2164 | emit_insn (gen_tls_arg (arg, sym)); | |
e1b8828b MF |
2165 | emit_move_insn (a_io, arg); |
2166 | call_insn = emit_call_insn (gen_tls_call (a_io, fn, sym, const1_rtx)); | |
2167 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), a_io); | |
6a7a462c BW |
2168 | insns = get_insns (); |
2169 | end_sequence (); | |
2170 | ||
e1b8828b | 2171 | *retp = a_io; |
6a7a462c BW |
2172 | return insns; |
2173 | } | |
2174 | ||
2175 | ||
2176 | static rtx | |
2177 | xtensa_legitimize_tls_address (rtx x) | |
2178 | { | |
2179 | unsigned int model = SYMBOL_REF_TLS_MODEL (x); | |
240a513f DM |
2180 | rtx dest, tp, ret, modbase, base, addend; |
2181 | rtx_insn *insns; | |
6a7a462c BW |
2182 | |
2183 | dest = gen_reg_rtx (Pmode); | |
2184 | switch (model) | |
2185 | { | |
2186 | case TLS_MODEL_GLOBAL_DYNAMIC: | |
2187 | insns = xtensa_call_tls_desc (x, &ret); | |
2188 | emit_libcall_block (insns, dest, ret, x); | |
2189 | break; | |
2190 | ||
2191 | case TLS_MODEL_LOCAL_DYNAMIC: | |
2192 | base = gen_reg_rtx (Pmode); | |
2193 | modbase = xtensa_tls_module_base (); | |
2194 | insns = xtensa_call_tls_desc (modbase, &ret); | |
2195 | emit_libcall_block (insns, base, ret, modbase); | |
2196 | addend = force_reg (SImode, gen_sym_DTPOFF (x)); | |
2197 | emit_insn (gen_addsi3 (dest, base, addend)); | |
2198 | break; | |
2199 | ||
2200 | case TLS_MODEL_INITIAL_EXEC: | |
2201 | case TLS_MODEL_LOCAL_EXEC: | |
2202 | tp = gen_reg_rtx (SImode); | |
f959607b | 2203 | emit_insn (gen_get_thread_pointersi (tp)); |
6a7a462c BW |
2204 | addend = force_reg (SImode, gen_sym_TPOFF (x)); |
2205 | emit_insn (gen_addsi3 (dest, tp, addend)); | |
2206 | break; | |
2207 | ||
2208 | default: | |
2209 | gcc_unreachable (); | |
2210 | } | |
2211 | ||
2212 | return dest; | |
2213 | } | |
2214 | ||
2215 | ||
da1f39e4 BW |
2216 | rtx |
2217 | xtensa_legitimize_address (rtx x, | |
2218 | rtx oldx ATTRIBUTE_UNUSED, | |
ef4bddc2 | 2219 | machine_mode mode) |
da1f39e4 | 2220 | { |
6a7a462c BW |
2221 | if (xtensa_tls_symbol_p (x)) |
2222 | return xtensa_legitimize_tls_address (x); | |
2223 | ||
da1f39e4 BW |
2224 | if (GET_CODE (x) == PLUS) |
2225 | { | |
2226 | rtx plus0 = XEXP (x, 0); | |
2227 | rtx plus1 = XEXP (x, 1); | |
2228 | ||
2229 | if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) | |
2230 | { | |
2231 | plus0 = XEXP (x, 1); | |
2232 | plus1 = XEXP (x, 0); | |
2233 | } | |
2234 | ||
2235 | /* Try to split up the offset to use an ADDMI instruction. */ | |
2236 | if (GET_CODE (plus0) == REG | |
2237 | && GET_CODE (plus1) == CONST_INT | |
2238 | && !xtensa_mem_offset (INTVAL (plus1), mode) | |
2239 | && !xtensa_simm8 (INTVAL (plus1)) | |
2240 | && xtensa_mem_offset (INTVAL (plus1) & 0xff, mode) | |
2241 | && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) | |
2242 | { | |
2243 | rtx temp = gen_reg_rtx (Pmode); | |
2244 | rtx addmi_offset = GEN_INT (INTVAL (plus1) & ~0xff); | |
f7df4a84 RS |
2245 | emit_insn (gen_rtx_SET (temp, gen_rtx_PLUS (Pmode, plus0, |
2246 | addmi_offset))); | |
da1f39e4 BW |
2247 | return gen_rtx_PLUS (Pmode, temp, GEN_INT (INTVAL (plus1) & 0xff)); |
2248 | } | |
2249 | } | |
2250 | ||
506d7b68 | 2251 | return x; |
da1f39e4 BW |
2252 | } |
2253 | ||
a1a79768 AS |
2254 | /* Worker function for TARGET_MODE_DEPENDENT_ADDRESS_P. |
2255 | ||
2256 | Treat constant-pool references as "mode dependent" since they can | |
2257 | only be accessed with SImode loads. This works around a bug in the | |
2258 | combiner where a constant pool reference is temporarily converted | |
2259 | to an HImode load, which is then assumed to zero-extend based on | |
2260 | our definition of LOAD_EXTEND_OP. This is wrong because the high | |
2261 | bits of a 16-bit value in the constant pool are now sign-extended | |
2262 | by default. */ | |
2263 | ||
2264 | static bool | |
5bfed9a9 GJL |
2265 | xtensa_mode_dependent_address_p (const_rtx addr, |
2266 | addr_space_t as ATTRIBUTE_UNUSED) | |
a1a79768 AS |
2267 | { |
2268 | return constantpool_address_p (addr); | |
2269 | } | |
da1f39e4 | 2270 | |
6a7a462c BW |
2271 | /* Return TRUE if X contains any TLS symbol references. */ |
2272 | ||
2273 | bool | |
2274 | xtensa_tls_referenced_p (rtx x) | |
2275 | { | |
e46dad5d | 2276 | if (! targetm.have_tls) |
6a7a462c BW |
2277 | return false; |
2278 | ||
2f36a994 RS |
2279 | subrtx_iterator::array_type array; |
2280 | FOR_EACH_SUBRTX (iter, array, x, ALL) | |
2281 | { | |
2282 | const_rtx x = *iter; | |
2283 | if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0) | |
2284 | return true; | |
2285 | ||
2286 | /* Ignore TLS references that have already been legitimized. */ | |
2287 | if (GET_CODE (x) == UNSPEC) | |
2288 | switch (XINT (x, 1)) | |
2289 | { | |
2290 | case UNSPEC_TPOFF: | |
2291 | case UNSPEC_DTPOFF: | |
2292 | case UNSPEC_TLS_FUNC: | |
2293 | case UNSPEC_TLS_ARG: | |
2294 | case UNSPEC_TLS_CALL: | |
2295 | iter.skip_subrtxes (); | |
2296 | break; | |
2297 | default: | |
2298 | break; | |
2299 | } | |
2300 | } | |
2301 | return false; | |
6a7a462c BW |
2302 | } |
2303 | ||
2304 | ||
fbbf66e7 RS |
2305 | /* Implement TARGET_CANNOT_FORCE_CONST_MEM. */ |
2306 | ||
2307 | static bool | |
ef4bddc2 | 2308 | xtensa_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
fbbf66e7 RS |
2309 | { |
2310 | return xtensa_tls_referenced_p (x); | |
2311 | } | |
2312 | ||
2313 | ||
b0c6e48f | 2314 | /* Return the debugger register number to use for 'regno'. */ |
03984308 BW |
2315 | |
2316 | int | |
ffbc8796 | 2317 | xtensa_dbx_register_number (int regno) |
03984308 BW |
2318 | { |
2319 | int first = -1; | |
633e4eb4 BW |
2320 | |
2321 | if (GP_REG_P (regno)) | |
2322 | { | |
2323 | regno -= GP_REG_FIRST; | |
2324 | first = 0; | |
2325 | } | |
2326 | else if (BR_REG_P (regno)) | |
2327 | { | |
2328 | regno -= BR_REG_FIRST; | |
2329 | first = 16; | |
2330 | } | |
2331 | else if (FP_REG_P (regno)) | |
2332 | { | |
2333 | regno -= FP_REG_FIRST; | |
b0c6e48f | 2334 | first = 48; |
633e4eb4 | 2335 | } |
03984308 BW |
2336 | else if (ACC_REG_P (regno)) |
2337 | { | |
b0c6e48f BW |
2338 | first = 0x200; /* Start of Xtensa special registers. */ |
2339 | regno = 16; /* ACCLO is special register 16. */ | |
03984308 BW |
2340 | } |
2341 | ||
2342 | /* When optimizing, we sometimes get asked about pseudo-registers | |
638db43e | 2343 | that don't represent hard registers. Return 0 for these. */ |
03984308 BW |
2344 | if (first == -1) |
2345 | return 0; | |
2346 | ||
2347 | return first + regno; | |
2348 | } | |
2349 | ||
2350 | ||
2351 | /* Argument support functions. */ | |
2352 | ||
2353 | /* Initialize CUMULATIVE_ARGS for a function. */ | |
2354 | ||
2355 | void | |
997b8b4d | 2356 | init_cumulative_args (CUMULATIVE_ARGS *cum, int incoming) |
03984308 BW |
2357 | { |
2358 | cum->arg_words = 0; | |
997b8b4d | 2359 | cum->incoming = incoming; |
03984308 BW |
2360 | } |
2361 | ||
ffbc8796 | 2362 | |
03984308 BW |
2363 | /* Advance the argument to the next argument position. */ |
2364 | ||
626a4b31 | 2365 | static void |
6930c98c RS |
2366 | xtensa_function_arg_advance (cumulative_args_t cum, |
2367 | const function_arg_info &arg) | |
03984308 BW |
2368 | { |
2369 | int words, max; | |
2370 | int *arg_words; | |
2371 | ||
d5cc9181 | 2372 | arg_words = &get_cumulative_args (cum)->arg_words; |
03984308 BW |
2373 | max = MAX_ARGS_IN_REGISTERS; |
2374 | ||
6930c98c RS |
2375 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2376 | / UNITS_PER_WORD); | |
03984308 | 2377 | |
85d91d5b | 2378 | if (*arg_words < max |
0ffef200 | 2379 | && (targetm.calls.must_pass_in_stack (arg) |
85d91d5b | 2380 | || *arg_words + words > max)) |
03984308 BW |
2381 | *arg_words = max; |
2382 | ||
2383 | *arg_words += words; | |
2384 | } | |
2385 | ||
2386 | ||
6783fdb7 | 2387 | /* Return an RTL expression containing the register for the given argument, |
368ebcd6 | 2388 | or 0 if the argument is to be passed on the stack. INCOMING_P is nonzero |
ffbc8796 | 2389 | if this is an incoming argument to the current function. */ |
03984308 | 2390 | |
626a4b31 | 2391 | static rtx |
6783fdb7 RS |
2392 | xtensa_function_arg_1 (cumulative_args_t cum_v, const function_arg_info &arg, |
2393 | bool incoming_p) | |
03984308 | 2394 | { |
d5cc9181 | 2395 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); |
03984308 BW |
2396 | int regbase, words, max; |
2397 | int *arg_words; | |
2398 | int regno; | |
03984308 BW |
2399 | |
2400 | arg_words = &cum->arg_words; | |
2401 | regbase = (incoming_p ? GP_ARG_FIRST : GP_OUTGOING_ARG_FIRST); | |
2402 | max = MAX_ARGS_IN_REGISTERS; | |
2403 | ||
6783fdb7 RS |
2404 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2405 | / UNITS_PER_WORD); | |
03984308 | 2406 | |
6783fdb7 | 2407 | if (arg.type && (TYPE_ALIGN (arg.type) > BITS_PER_WORD)) |
822e895c | 2408 | { |
6783fdb7 | 2409 | int align = MIN (TYPE_ALIGN (arg.type), STACK_BOUNDARY) / BITS_PER_WORD; |
822e895c BW |
2410 | *arg_words = (*arg_words + align - 1) & -align; |
2411 | } | |
03984308 BW |
2412 | |
2413 | if (*arg_words + words > max) | |
2414 | return (rtx)0; | |
2415 | ||
2416 | regno = regbase + *arg_words; | |
03984308 | 2417 | |
997b8b4d | 2418 | if (cum->incoming && regno <= A7_REG && regno + words > A7_REG) |
590e2636 | 2419 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
03984308 | 2420 | |
6783fdb7 | 2421 | return gen_rtx_REG (arg.mode, regno); |
03984308 BW |
2422 | } |
2423 | ||
626a4b31 NF |
2424 | /* Implement TARGET_FUNCTION_ARG. */ |
2425 | ||
2426 | static rtx | |
6783fdb7 | 2427 | xtensa_function_arg (cumulative_args_t cum, const function_arg_info &arg) |
626a4b31 | 2428 | { |
6783fdb7 | 2429 | return xtensa_function_arg_1 (cum, arg, false); |
626a4b31 NF |
2430 | } |
2431 | ||
2432 | /* Implement TARGET_FUNCTION_INCOMING_ARG. */ | |
2433 | ||
2434 | static rtx | |
6783fdb7 RS |
2435 | xtensa_function_incoming_arg (cumulative_args_t cum, |
2436 | const function_arg_info &arg) | |
626a4b31 | 2437 | { |
6783fdb7 | 2438 | return xtensa_function_arg_1 (cum, arg, true); |
626a4b31 | 2439 | } |
03984308 | 2440 | |
c2ed6cf8 | 2441 | static unsigned int |
ef4bddc2 | 2442 | xtensa_function_arg_boundary (machine_mode mode, const_tree type) |
d2348985 BW |
2443 | { |
2444 | unsigned int alignment; | |
2445 | ||
2446 | alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode); | |
2447 | if (alignment < PARM_BOUNDARY) | |
2448 | alignment = PARM_BOUNDARY; | |
2449 | if (alignment > STACK_BOUNDARY) | |
2450 | alignment = STACK_BOUNDARY; | |
2451 | return alignment; | |
2452 | } | |
2453 | ||
2454 | ||
6e5ff6e7 | 2455 | static bool |
586de218 | 2456 | xtensa_return_in_msb (const_tree valtype) |
6e5ff6e7 BW |
2457 | { |
2458 | return (TARGET_BIG_ENDIAN | |
2459 | && AGGREGATE_TYPE_P (valtype) | |
2460 | && int_size_in_bytes (valtype) >= UNITS_PER_WORD); | |
2461 | } | |
2462 | ||
2463 | ||
c5387660 JM |
2464 | static void |
2465 | xtensa_option_override (void) | |
03984308 BW |
2466 | { |
2467 | int regno; | |
ef4bddc2 | 2468 | machine_mode mode; |
03984308 | 2469 | |
8c8eb949 MF |
2470 | if (xtensa_windowed_abi == -1) |
2471 | xtensa_windowed_abi = TARGET_WINDOWED_ABI_DEFAULT; | |
2472 | ||
e46dad5d MF |
2473 | if (! TARGET_THREADPTR) |
2474 | targetm.have_tls = false; | |
2475 | ||
1a711a0b MF |
2476 | /* Use CONST16 in the absence of L32R. |
2477 | Set it in the TARGET_OPTION_OVERRIDE to avoid dependency on xtensa | |
e53b6e56 | 2478 | configuration in the xtensa-common.cc */ |
1a711a0b MF |
2479 | |
2480 | if (!TARGET_L32R) | |
2481 | target_flags |= MASK_CONST16; | |
2482 | ||
03984308 BW |
2483 | if (!TARGET_BOOLEANS && TARGET_HARD_FLOAT) |
2484 | error ("boolean registers required for the floating-point option"); | |
2485 | ||
638db43e | 2486 | /* Set up array giving whether a given register can hold a given mode. */ |
03984308 BW |
2487 | for (mode = VOIDmode; |
2488 | mode != MAX_MACHINE_MODE; | |
ef4bddc2 | 2489 | mode = (machine_mode) ((int) mode + 1)) |
03984308 BW |
2490 | { |
2491 | int size = GET_MODE_SIZE (mode); | |
0a2aaacc | 2492 | enum mode_class mclass = GET_MODE_CLASS (mode); |
03984308 BW |
2493 | |
2494 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2495 | { | |
2496 | int temp; | |
2497 | ||
2498 | if (ACC_REG_P (regno)) | |
f42f5a1b | 2499 | temp = (TARGET_MAC16 |
0a2aaacc | 2500 | && (mclass == MODE_INT) && (size <= UNITS_PER_WORD)); |
03984308 BW |
2501 | else if (GP_REG_P (regno)) |
2502 | temp = ((regno & 1) == 0 || (size <= UNITS_PER_WORD)); | |
2503 | else if (FP_REG_P (regno)) | |
2504 | temp = (TARGET_HARD_FLOAT && (mode == SFmode)); | |
2505 | else if (BR_REG_P (regno)) | |
2506 | temp = (TARGET_BOOLEANS && (mode == CCmode)); | |
2507 | else | |
2508 | temp = FALSE; | |
2509 | ||
f939c3e6 | 2510 | xtensa_hard_regno_mode_ok_p[(int) mode][regno] = temp; |
03984308 BW |
2511 | } |
2512 | } | |
2513 | ||
2514 | init_machine_status = xtensa_init_machine_status; | |
03984308 | 2515 | |
f42f5a1b BW |
2516 | /* Check PIC settings. PIC is only supported when using L32R |
2517 | instructions, and some targets need to always use PIC. */ | |
2518 | if (flag_pic && TARGET_CONST16) | |
a3f9f006 | 2519 | error ("%<-f%s%> is not supported with CONST16 instructions", |
f42f5a1b | 2520 | (flag_pic > 1 ? "PIC" : "pic")); |
1b408ba1 SA |
2521 | else if (TARGET_FORCE_NO_PIC) |
2522 | flag_pic = 0; | |
f42f5a1b BW |
2523 | else if (XTENSA_ALWAYS_PIC) |
2524 | { | |
2525 | if (TARGET_CONST16) | |
2526 | error ("PIC is required but not supported with CONST16 instructions"); | |
2527 | flag_pic = 1; | |
2528 | } | |
2529 | /* There's no need for -fPIC (as opposed to -fpic) on Xtensa. */ | |
2530 | if (flag_pic > 1) | |
03984308 | 2531 | flag_pic = 1; |
166b25dc BW |
2532 | if (flag_pic && !flag_pie) |
2533 | flag_shlib = 1; | |
87c8b4be CT |
2534 | |
2535 | /* Hot/cold partitioning does not work on this architecture, because of | |
2536 | constant pools (the load instruction cannot necessarily reach that far). | |
2537 | Therefore disable it on this architecture. */ | |
2538 | if (flag_reorder_blocks_and_partition) | |
2539 | { | |
2540 | flag_reorder_blocks_and_partition = 0; | |
2541 | flag_reorder_blocks = 1; | |
2542 | } | |
03984308 BW |
2543 | } |
2544 | ||
c43f4279 RS |
2545 | /* Implement TARGET_HARD_REGNO_NREGS. */ |
2546 | ||
2547 | static unsigned int | |
2548 | xtensa_hard_regno_nregs (unsigned int regno, machine_mode mode) | |
2549 | { | |
2550 | if (FP_REG_P (regno)) | |
2551 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_FPREG); | |
2552 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD); | |
2553 | } | |
2554 | ||
f939c3e6 RS |
2555 | /* Implement TARGET_HARD_REGNO_MODE_OK. */ |
2556 | ||
2557 | static bool | |
2558 | xtensa_hard_regno_mode_ok (unsigned int regno, machine_mode mode) | |
2559 | { | |
2560 | return xtensa_hard_regno_mode_ok_p[mode][regno]; | |
2561 | } | |
2562 | ||
99e1629f RS |
2563 | /* Implement TARGET_MODES_TIEABLE_P. */ |
2564 | ||
2565 | static bool | |
2566 | xtensa_modes_tieable_p (machine_mode mode1, machine_mode mode2) | |
2567 | { | |
2568 | return ((GET_MODE_CLASS (mode1) == MODE_FLOAT | |
2569 | || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) | |
2570 | == (GET_MODE_CLASS (mode2) == MODE_FLOAT | |
2571 | || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); | |
2572 | } | |
2573 | ||
03984308 BW |
2574 | /* A C compound statement to output to stdio stream STREAM the |
2575 | assembler syntax for an instruction operand X. X is an RTL | |
2576 | expression. | |
2577 | ||
2578 | CODE is a value that can be used to specify one of several ways | |
2579 | of printing the operand. It is used when identical operands | |
2580 | must be printed differently depending on the context. CODE | |
2581 | comes from the '%' specification that was used to request | |
2582 | printing of the operand. If the specification was just '%DIGIT' | |
2583 | then CODE is 0; if the specification was '%LTR DIGIT' then CODE | |
2584 | is the ASCII code for LTR. | |
2585 | ||
2586 | If X is a register, this macro should print the register's name. | |
2587 | The names can be found in an array 'reg_names' whose type is | |
2588 | 'char *[]'. 'reg_names' is initialized from 'REGISTER_NAMES'. | |
2589 | ||
2590 | When the machine description has a specification '%PUNCT' (a '%' | |
2591 | followed by a punctuation character), this macro is called with | |
2592 | a null pointer for X and the punctuation character for CODE. | |
2593 | ||
2594 | 'a', 'c', 'l', and 'n' are reserved. | |
633e4eb4 | 2595 | |
03984308 BW |
2596 | The Xtensa specific codes are: |
2597 | ||
2598 | 'd' CONST_INT, print as signed decimal | |
2599 | 'x' CONST_INT, print as signed hexadecimal | |
2600 | 'K' CONST_INT, print number of bits in mask for EXTUI | |
2601 | 'R' CONST_INT, print (X & 0x1f) | |
2602 | 'L' CONST_INT, print ((32 - X) & 0x1f) | |
2603 | 'D' REG, print second register of double-word register operand | |
2604 | 'N' MEM, print address of next word following a memory operand | |
2605 | 'v' MEM, if memory reference is volatile, output a MEMW before it | |
f42f5a1b BW |
2606 | 't' any constant, add "@h" suffix for top 16 bits |
2607 | 'b' any constant, add "@l" suffix for bottom 16 bits | |
03984308 BW |
2608 | */ |
2609 | ||
2610 | static void | |
ffbc8796 | 2611 | printx (FILE *file, signed int val) |
03984308 | 2612 | { |
ffbc8796 | 2613 | /* Print a hexadecimal value in a nice way. */ |
9b251fe2 | 2614 | if (IN_RANGE (val, -9, 9)) |
03984308 BW |
2615 | fprintf (file, "%d", val); |
2616 | else if (val < 0) | |
2617 | fprintf (file, "-0x%x", -val); | |
2618 | else | |
2619 | fprintf (file, "0x%x", val); | |
2620 | } | |
2621 | ||
2622 | ||
2623 | void | |
ffbc8796 | 2624 | print_operand (FILE *file, rtx x, int letter) |
03984308 | 2625 | { |
f42f5a1b | 2626 | if (!x) |
7e5baa7e | 2627 | error ("%<PRINT_OPERAND%> null pointer"); |
03984308 | 2628 | |
f42f5a1b | 2629 | switch (letter) |
03984308 | 2630 | { |
f42f5a1b BW |
2631 | case 'D': |
2632 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) | |
2633 | fprintf (file, "%s", reg_names[xt_true_regnum (x) + 1]); | |
2634 | else | |
2635 | output_operand_lossage ("invalid %%D value"); | |
2636 | break; | |
03984308 | 2637 | |
f42f5a1b BW |
2638 | case 'v': |
2639 | if (GET_CODE (x) == MEM) | |
2640 | { | |
2641 | /* For a volatile memory reference, emit a MEMW before the | |
2642 | load or store. */ | |
66e58b33 | 2643 | if (MEM_VOLATILE_P (x) && TARGET_SERIALIZE_VOLATILE) |
f42f5a1b BW |
2644 | fprintf (file, "memw\n\t"); |
2645 | } | |
2646 | else | |
2647 | output_operand_lossage ("invalid %%v value"); | |
2648 | break; | |
03984308 | 2649 | |
f42f5a1b BW |
2650 | case 'N': |
2651 | if (GET_CODE (x) == MEM | |
2652 | && (GET_MODE (x) == DFmode || GET_MODE (x) == DImode)) | |
2653 | { | |
0d4a1197 RS |
2654 | x = adjust_address (x, GET_MODE (x) == DFmode ? E_SFmode : E_SImode, |
2655 | 4); | |
cc8ca59e | 2656 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b BW |
2657 | } |
2658 | else | |
2659 | output_operand_lossage ("invalid %%N value"); | |
2660 | break; | |
03984308 | 2661 | |
f42f5a1b BW |
2662 | case 'K': |
2663 | if (GET_CODE (x) == CONST_INT) | |
03984308 | 2664 | { |
f42f5a1b | 2665 | unsigned val = INTVAL (x); |
b753405a | 2666 | if (!xtensa_mask_immediate (val)) |
f42f5a1b | 2667 | fatal_insn ("invalid mask", x); |
03984308 | 2668 | |
b753405a | 2669 | fprintf (file, "%d", floor_log2 (val + 1)); |
f42f5a1b BW |
2670 | } |
2671 | else | |
2672 | output_operand_lossage ("invalid %%K value"); | |
2673 | break; | |
03984308 | 2674 | |
f42f5a1b BW |
2675 | case 'L': |
2676 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2677 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, (32 - INTVAL (x)) & 0x1f); |
f42f5a1b BW |
2678 | else |
2679 | output_operand_lossage ("invalid %%L value"); | |
2680 | break; | |
03984308 | 2681 | |
f42f5a1b BW |
2682 | case 'R': |
2683 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2684 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) & 0x1f); |
f42f5a1b BW |
2685 | else |
2686 | output_operand_lossage ("invalid %%R value"); | |
2687 | break; | |
03984308 | 2688 | |
f42f5a1b BW |
2689 | case 'x': |
2690 | if (GET_CODE (x) == CONST_INT) | |
2691 | printx (file, INTVAL (x)); | |
2692 | else | |
2693 | output_operand_lossage ("invalid %%x value"); | |
2694 | break; | |
03984308 | 2695 | |
f42f5a1b BW |
2696 | case 'd': |
2697 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2698 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2699 | else |
2700 | output_operand_lossage ("invalid %%d value"); | |
2701 | break; | |
03984308 | 2702 | |
f42f5a1b BW |
2703 | case 't': |
2704 | case 'b': | |
2705 | if (GET_CODE (x) == CONST_INT) | |
2706 | { | |
2707 | printx (file, INTVAL (x)); | |
2708 | fputs (letter == 't' ? "@h" : "@l", file); | |
2709 | } | |
2710 | else if (GET_CODE (x) == CONST_DOUBLE) | |
2711 | { | |
f42f5a1b BW |
2712 | if (GET_MODE (x) == SFmode) |
2713 | { | |
2714 | long l; | |
34a72c33 | 2715 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
f42f5a1b BW |
2716 | fprintf (file, "0x%08lx@%c", l, letter == 't' ? 'h' : 'l'); |
2717 | } | |
2718 | else | |
2719 | output_operand_lossage ("invalid %%t/%%b value"); | |
2720 | } | |
2721 | else if (GET_CODE (x) == CONST) | |
2722 | { | |
2723 | /* X must be a symbolic constant on ELF. Write an expression | |
2724 | suitable for 'const16' that sets the high or low 16 bits. */ | |
2725 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
2726 | || (GET_CODE (XEXP (XEXP (x, 0), 0)) != SYMBOL_REF | |
2727 | && GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
2728 | || GET_CODE (XEXP (XEXP (x, 0), 1)) != CONST_INT) | |
2729 | output_operand_lossage ("invalid %%t/%%b value"); | |
2730 | print_operand (file, XEXP (XEXP (x, 0), 0), 0); | |
2731 | fputs (letter == 't' ? "@h" : "@l", file); | |
2732 | /* There must be a non-alphanumeric character between 'h' or 'l' | |
2733 | and the number. The '-' is added by print_operand() already. */ | |
2734 | if (INTVAL (XEXP (XEXP (x, 0), 1)) >= 0) | |
2735 | fputs ("+", file); | |
2736 | print_operand (file, XEXP (XEXP (x, 0), 1), 0); | |
2737 | } | |
2738 | else | |
633e4eb4 | 2739 | { |
f42f5a1b BW |
2740 | output_addr_const (file, x); |
2741 | fputs (letter == 't' ? "@h" : "@l", file); | |
03984308 BW |
2742 | } |
2743 | break; | |
2744 | ||
a024f514 MF |
2745 | case 'y': |
2746 | if (GET_CODE (x) == CONST_DOUBLE && | |
2747 | GET_MODE (x) == SFmode) | |
2748 | { | |
a024f514 | 2749 | long l; |
34a72c33 | 2750 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
a024f514 MF |
2751 | fprintf (file, "0x%08lx", l); |
2752 | break; | |
2753 | } | |
2754 | ||
2755 | /* fall through */ | |
2756 | ||
03984308 | 2757 | default: |
f42f5a1b BW |
2758 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) |
2759 | fprintf (file, "%s", reg_names[xt_true_regnum (x)]); | |
2760 | else if (GET_CODE (x) == MEM) | |
cc8ca59e | 2761 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b | 2762 | else if (GET_CODE (x) == CONST_INT) |
3904010d | 2763 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2764 | else |
2765 | output_addr_const (file, x); | |
03984308 BW |
2766 | } |
2767 | } | |
2768 | ||
2769 | ||
2770 | /* A C compound statement to output to stdio stream STREAM the | |
2771 | assembler syntax for an instruction operand that is a memory | |
fb49053f | 2772 | reference whose address is ADDR. ADDR is an RTL expression. */ |
03984308 BW |
2773 | |
2774 | void | |
ffbc8796 | 2775 | print_operand_address (FILE *file, rtx addr) |
03984308 BW |
2776 | { |
2777 | if (!addr) | |
7e5baa7e | 2778 | error ("%<PRINT_OPERAND_ADDRESS%>, null pointer"); |
03984308 BW |
2779 | |
2780 | switch (GET_CODE (addr)) | |
2781 | { | |
2782 | default: | |
2783 | fatal_insn ("invalid address", addr); | |
2784 | break; | |
2785 | ||
2786 | case REG: | |
2787 | fprintf (file, "%s, 0", reg_names [REGNO (addr)]); | |
2788 | break; | |
2789 | ||
2790 | case PLUS: | |
2791 | { | |
2792 | rtx reg = (rtx)0; | |
2793 | rtx offset = (rtx)0; | |
2794 | rtx arg0 = XEXP (addr, 0); | |
2795 | rtx arg1 = XEXP (addr, 1); | |
2796 | ||
2797 | if (GET_CODE (arg0) == REG) | |
2798 | { | |
2799 | reg = arg0; | |
2800 | offset = arg1; | |
2801 | } | |
2802 | else if (GET_CODE (arg1) == REG) | |
2803 | { | |
2804 | reg = arg1; | |
2805 | offset = arg0; | |
2806 | } | |
2807 | else | |
2808 | fatal_insn ("no register in address", addr); | |
2809 | ||
2810 | if (CONSTANT_P (offset)) | |
2811 | { | |
2812 | fprintf (file, "%s, ", reg_names [REGNO (reg)]); | |
2813 | output_addr_const (file, offset); | |
2814 | } | |
2815 | else | |
2816 | fatal_insn ("address offset not a constant", addr); | |
2817 | } | |
2818 | break; | |
2819 | ||
2820 | case LABEL_REF: | |
2821 | case SYMBOL_REF: | |
2822 | case CONST_INT: | |
2823 | case CONST: | |
2824 | output_addr_const (file, addr); | |
2825 | break; | |
2826 | } | |
2827 | } | |
2828 | ||
2ac6bb04 | 2829 | /* Implement TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ |
03984308 | 2830 | |
2ac6bb04 | 2831 | static bool |
da1f39e4 BW |
2832 | xtensa_output_addr_const_extra (FILE *fp, rtx x) |
2833 | { | |
2834 | if (GET_CODE (x) == UNSPEC && XVECLEN (x, 0) == 1) | |
2835 | { | |
2836 | switch (XINT (x, 1)) | |
2837 | { | |
6a7a462c BW |
2838 | case UNSPEC_TPOFF: |
2839 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2840 | fputs ("@TPOFF", fp); | |
2841 | return true; | |
2842 | case UNSPEC_DTPOFF: | |
2843 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2844 | fputs ("@DTPOFF", fp); | |
2845 | return true; | |
da1f39e4 BW |
2846 | case UNSPEC_PLT: |
2847 | if (flag_pic) | |
2848 | { | |
2849 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2850 | fputs ("@PLT", fp); | |
2851 | return true; | |
2852 | } | |
2853 | break; | |
2854 | default: | |
2855 | break; | |
2856 | } | |
2857 | } | |
2858 | return false; | |
2859 | } | |
2860 | ||
9ae4ef4c MF |
2861 | static void |
2862 | xtensa_output_integer_literal_parts (FILE *file, rtx x, int size) | |
2863 | { | |
2864 | if (size > 4 && !(size & (size - 1))) | |
2865 | { | |
2866 | rtx first, second; | |
2867 | ||
2868 | split_double (x, &first, &second); | |
2869 | xtensa_output_integer_literal_parts (file, first, size / 2); | |
2870 | fputs (", ", file); | |
2871 | xtensa_output_integer_literal_parts (file, second, size / 2); | |
2872 | } | |
2873 | else if (size == 4) | |
2874 | { | |
2875 | output_addr_const (file, x); | |
2876 | } | |
2877 | else | |
2878 | { | |
2879 | gcc_unreachable(); | |
2880 | } | |
2881 | } | |
da1f39e4 | 2882 | |
03984308 | 2883 | void |
ef4bddc2 | 2884 | xtensa_output_literal (FILE *file, rtx x, machine_mode mode, int labelno) |
03984308 BW |
2885 | { |
2886 | long value_long[2]; | |
03984308 BW |
2887 | |
2888 | fprintf (file, "\t.literal .LC%u, ", (unsigned) labelno); | |
2889 | ||
2890 | switch (GET_MODE_CLASS (mode)) | |
2891 | { | |
2892 | case MODE_FLOAT: | |
177b6be0 | 2893 | gcc_assert (GET_CODE (x) == CONST_DOUBLE); |
03984308 | 2894 | |
03984308 BW |
2895 | switch (mode) |
2896 | { | |
4e10a5a7 | 2897 | case E_SFmode: |
34a72c33 RS |
2898 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), |
2899 | value_long[0]); | |
4575a800 BW |
2900 | if (HOST_BITS_PER_LONG > 32) |
2901 | value_long[0] &= 0xffffffff; | |
b216cd4a | 2902 | fprintf (file, "0x%08lx\n", value_long[0]); |
03984308 BW |
2903 | break; |
2904 | ||
4e10a5a7 | 2905 | case E_DFmode: |
34a72c33 RS |
2906 | REAL_VALUE_TO_TARGET_DOUBLE (*CONST_DOUBLE_REAL_VALUE (x), |
2907 | value_long); | |
4575a800 BW |
2908 | if (HOST_BITS_PER_LONG > 32) |
2909 | { | |
2910 | value_long[0] &= 0xffffffff; | |
2911 | value_long[1] &= 0xffffffff; | |
2912 | } | |
b216cd4a ZW |
2913 | fprintf (file, "0x%08lx, 0x%08lx\n", |
2914 | value_long[0], value_long[1]); | |
03984308 BW |
2915 | break; |
2916 | ||
2917 | default: | |
177b6be0 | 2918 | gcc_unreachable (); |
03984308 BW |
2919 | } |
2920 | ||
2921 | break; | |
2922 | ||
2923 | case MODE_INT: | |
2924 | case MODE_PARTIAL_INT: | |
9ae4ef4c MF |
2925 | xtensa_output_integer_literal_parts (file, x, GET_MODE_SIZE (mode)); |
2926 | fputs ("\n", file); | |
03984308 BW |
2927 | break; |
2928 | ||
2929 | default: | |
177b6be0 | 2930 | gcc_unreachable (); |
03984308 BW |
2931 | } |
2932 | } | |
2933 | ||
590e2636 MF |
2934 | static bool |
2935 | xtensa_call_save_reg(int regno) | |
2936 | { | |
2937 | if (TARGET_WINDOWED_ABI) | |
2938 | return false; | |
2939 | ||
2940 | if (regno == A0_REG) | |
2941 | return crtl->profile || !crtl->is_leaf || crtl->calls_eh_return || | |
2942 | df_regs_ever_live_p (regno); | |
2943 | ||
9b251fe2 | 2944 | if (crtl->calls_eh_return && IN_RANGE (regno, 2, 3)) |
590e2636 MF |
2945 | return true; |
2946 | ||
2e3d041b | 2947 | return !call_used_or_fixed_reg_p (regno) && df_regs_ever_live_p (regno); |
590e2636 | 2948 | } |
03984308 BW |
2949 | |
2950 | /* Return the bytes needed to compute the frame pointer from the current | |
638db43e | 2951 | stack pointer. */ |
03984308 BW |
2952 | |
2953 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
2954 | #define XTENSA_STACK_ALIGN(LOC) (((LOC) + STACK_BYTES-1) & ~(STACK_BYTES-1)) | |
2955 | ||
2956 | long | |
f075bd95 | 2957 | compute_frame_size (poly_int64 size) |
03984308 | 2958 | { |
590e2636 MF |
2959 | int regno; |
2960 | ||
ad89d820 MF |
2961 | if (reload_completed && cfun->machine->frame_laid_out) |
2962 | return cfun->machine->current_frame_size; | |
2963 | ||
ffbc8796 | 2964 | /* Add space for the incoming static chain value. */ |
6de9cd9a | 2965 | if (cfun->static_chain_decl != NULL) |
03984308 BW |
2966 | size += (1 * UNITS_PER_WORD); |
2967 | ||
ad89d820 | 2968 | cfun->machine->callee_save_size = 0; |
590e2636 MF |
2969 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) |
2970 | { | |
2971 | if (xtensa_call_save_reg(regno)) | |
ad89d820 | 2972 | cfun->machine->callee_save_size += UNITS_PER_WORD; |
590e2636 MF |
2973 | } |
2974 | ||
ad89d820 | 2975 | cfun->machine->current_frame_size = |
03984308 | 2976 | XTENSA_STACK_ALIGN (size |
ad89d820 | 2977 | + cfun->machine->callee_save_size |
38173d38 | 2978 | + crtl->outgoing_args_size |
03984308 | 2979 | + (WINDOW_SIZE * UNITS_PER_WORD)); |
ad89d820 MF |
2980 | cfun->machine->callee_save_size = |
2981 | XTENSA_STACK_ALIGN (cfun->machine->callee_save_size); | |
2982 | cfun->machine->frame_laid_out = true; | |
2983 | return cfun->machine->current_frame_size; | |
03984308 BW |
2984 | } |
2985 | ||
2986 | ||
b52b1749 | 2987 | bool |
ffbc8796 | 2988 | xtensa_frame_pointer_required (void) |
03984308 BW |
2989 | { |
2990 | /* The code to expand builtin_frame_addr and builtin_return_addr | |
2991 | currently uses the hard_frame_pointer instead of frame_pointer. | |
2992 | This seems wrong but maybe it's necessary for other architectures. | |
638db43e | 2993 | This function is derived from the i386 code. */ |
03984308 | 2994 | |
25403c41 | 2995 | if (cfun->machine->accesses_prev_frame || cfun->has_nonlocal_label) |
b52b1749 | 2996 | return true; |
03984308 | 2997 | |
b52b1749 | 2998 | return false; |
03984308 BW |
2999 | } |
3000 | ||
5057f9e0 | 3001 | HOST_WIDE_INT |
eced9b48 | 3002 | xtensa_initial_elimination_offset (int from, int to ATTRIBUTE_UNUSED) |
5057f9e0 MF |
3003 | { |
3004 | long frame_size = compute_frame_size (get_frame_size ()); | |
3005 | HOST_WIDE_INT offset; | |
3006 | ||
3007 | switch (from) | |
3008 | { | |
3009 | case FRAME_POINTER_REGNUM: | |
3010 | if (FRAME_GROWS_DOWNWARD) | |
3011 | offset = frame_size - (WINDOW_SIZE * UNITS_PER_WORD) | |
3012 | - cfun->machine->callee_save_size; | |
3013 | else | |
3014 | offset = 0; | |
3015 | break; | |
3016 | case ARG_POINTER_REGNUM: | |
3017 | offset = frame_size; | |
3018 | break; | |
3019 | default: | |
3020 | gcc_unreachable (); | |
3021 | } | |
3022 | ||
3023 | return offset; | |
3024 | } | |
03984308 | 3025 | |
7f0ee694 BW |
3026 | /* minimum frame = reg save area (4 words) plus static chain (1 word) |
3027 | and the total number of words must be a multiple of 128 bits. */ | |
3028 | #define MIN_FRAME_SIZE (8 * UNITS_PER_WORD) | |
3029 | ||
f42f5a1b | 3030 | void |
ffbc8796 | 3031 | xtensa_expand_prologue (void) |
f42f5a1b BW |
3032 | { |
3033 | HOST_WIDE_INT total_size; | |
590e2636 | 3034 | rtx_insn *insn = NULL; |
240a513f | 3035 | rtx note_rtx; |
18dbd950 | 3036 | |
590e2636 | 3037 | |
f42f5a1b | 3038 | total_size = compute_frame_size (get_frame_size ()); |
18dbd950 | 3039 | |
7695d1e3 MF |
3040 | if (flag_stack_usage_info) |
3041 | current_function_static_stack_size = total_size; | |
3042 | ||
590e2636 MF |
3043 | if (TARGET_WINDOWED_ABI) |
3044 | { | |
3045 | if (total_size < (1 << (12+3))) | |
3046 | insn = emit_insn (gen_entry (GEN_INT (total_size))); | |
3047 | else | |
3048 | { | |
3049 | /* Use a8 as a temporary since a0-a7 may be live. */ | |
3050 | rtx tmp_reg = gen_rtx_REG (Pmode, A8_REG); | |
3051 | emit_insn (gen_entry (GEN_INT (MIN_FRAME_SIZE))); | |
3052 | emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE)); | |
3053 | emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg)); | |
3054 | insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg)); | |
3055 | } | |
3056 | } | |
03984308 BW |
3057 | else |
3058 | { | |
590e2636 MF |
3059 | int regno; |
3060 | HOST_WIDE_INT offset = 0; | |
ad89d820 | 3061 | int callee_save_size = cfun->machine->callee_save_size; |
590e2636 MF |
3062 | |
3063 | /* -128 is a limit of single addi instruction. */ | |
9b251fe2 | 3064 | if (IN_RANGE (total_size, 1, 128)) |
590e2636 MF |
3065 | { |
3066 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
3067 | GEN_INT (-total_size))); | |
3068 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 3069 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
3070 | plus_constant (Pmode, stack_pointer_rtx, |
3071 | -total_size)); | |
3072 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3073 | offset = total_size - UNITS_PER_WORD; | |
3074 | } | |
ad89d820 | 3075 | else if (callee_save_size) |
590e2636 MF |
3076 | { |
3077 | /* 1020 is maximal s32i offset, if the frame is bigger than that | |
3078 | * we move sp to the end of callee-saved save area, save and then | |
3079 | * move it to its final location. */ | |
3080 | if (total_size > 1024) | |
3081 | { | |
3082 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
ad89d820 | 3083 | GEN_INT (-callee_save_size))); |
590e2636 | 3084 | RTX_FRAME_RELATED_P (insn) = 1; |
f7df4a84 | 3085 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 3086 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 3087 | -callee_save_size)); |
590e2636 | 3088 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); |
ad89d820 | 3089 | offset = callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
3090 | } |
3091 | else | |
3092 | { | |
3093 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
3094 | emit_move_insn (tmp_reg, GEN_INT (total_size)); | |
3095 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, | |
3096 | stack_pointer_rtx, tmp_reg)); | |
3097 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 3098 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
3099 | plus_constant (Pmode, stack_pointer_rtx, |
3100 | -total_size)); | |
3101 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3102 | offset = total_size - UNITS_PER_WORD; | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
3107 | { | |
3108 | if (xtensa_call_save_reg(regno)) | |
3109 | { | |
3110 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
3111 | rtx mem = gen_frame_mem (SImode, x); | |
3112 | rtx reg = gen_rtx_REG (SImode, regno); | |
3113 | ||
3114 | offset -= UNITS_PER_WORD; | |
3115 | insn = emit_move_insn (mem, reg); | |
3116 | RTX_FRAME_RELATED_P (insn) = 1; | |
3117 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, | |
f7df4a84 | 3118 | gen_rtx_SET (mem, reg)); |
590e2636 MF |
3119 | } |
3120 | } | |
1fe39f19 MF |
3121 | if (total_size > 1024 |
3122 | || (!callee_save_size && total_size > 128)) | |
590e2636 MF |
3123 | { |
3124 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
3125 | emit_move_insn (tmp_reg, GEN_INT (total_size - | |
ad89d820 | 3126 | callee_save_size)); |
590e2636 MF |
3127 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, |
3128 | stack_pointer_rtx, tmp_reg)); | |
3129 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 3130 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 3131 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 3132 | callee_save_size - |
590e2636 MF |
3133 | total_size)); |
3134 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3135 | } | |
03984308 BW |
3136 | } |
3137 | ||
f42f5a1b | 3138 | if (frame_pointer_needed) |
03984308 | 3139 | { |
997b8b4d | 3140 | if (cfun->machine->set_frame_ptr_insn) |
03984308 | 3141 | { |
240a513f | 3142 | rtx_insn *first; |
03984308 | 3143 | |
997b8b4d BW |
3144 | push_topmost_sequence (); |
3145 | first = get_insns (); | |
3146 | pop_topmost_sequence (); | |
03984308 | 3147 | |
f42f5a1b BW |
3148 | /* For all instructions prior to set_frame_ptr_insn, replace |
3149 | hard_frame_pointer references with stack_pointer. */ | |
3150 | for (insn = first; | |
997b8b4d | 3151 | insn != cfun->machine->set_frame_ptr_insn; |
f42f5a1b BW |
3152 | insn = NEXT_INSN (insn)) |
3153 | { | |
3154 | if (INSN_P (insn)) | |
20dca97b BW |
3155 | { |
3156 | PATTERN (insn) = replace_rtx (copy_rtx (PATTERN (insn)), | |
3157 | hard_frame_pointer_rtx, | |
3158 | stack_pointer_rtx); | |
3159 | df_insn_rescan (insn); | |
3160 | } | |
f42f5a1b BW |
3161 | } |
3162 | } | |
3163 | else | |
590e2636 MF |
3164 | { |
3165 | insn = emit_insn (gen_movsi (hard_frame_pointer_rtx, | |
3166 | stack_pointer_rtx)); | |
3167 | if (!TARGET_WINDOWED_ABI) | |
3168 | { | |
f7df4a84 | 3169 | note_rtx = gen_rtx_SET (hard_frame_pointer_rtx, |
590e2636 MF |
3170 | stack_pointer_rtx); |
3171 | RTX_FRAME_RELATED_P (insn) = 1; | |
3172 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3173 | } | |
3174 | } | |
3175 | } | |
03984308 | 3176 | |
590e2636 MF |
3177 | if (TARGET_WINDOWED_ABI) |
3178 | { | |
3179 | /* Create a note to describe the CFA. Because this is only used to set | |
3180 | DW_AT_frame_base for debug info, don't bother tracking changes through | |
3181 | each instruction in the prologue. It just takes up space. */ | |
f7df4a84 RS |
3182 | note_rtx = gen_rtx_SET ((frame_pointer_needed |
3183 | ? hard_frame_pointer_rtx | |
3184 | : stack_pointer_rtx), | |
590e2636 MF |
3185 | plus_constant (Pmode, stack_pointer_rtx, |
3186 | -total_size)); | |
3187 | RTX_FRAME_RELATED_P (insn) = 1; | |
3188 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
3189 | } | |
3190 | } | |
03984308 BW |
3191 | |
3192 | void | |
590e2636 | 3193 | xtensa_expand_epilogue (void) |
03984308 | 3194 | { |
590e2636 MF |
3195 | if (!TARGET_WINDOWED_ABI) |
3196 | { | |
3197 | int regno; | |
3198 | HOST_WIDE_INT offset; | |
3199 | ||
ad89d820 | 3200 | if (cfun->machine->current_frame_size > (frame_pointer_needed ? 127 : 1024)) |
590e2636 MF |
3201 | { |
3202 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
3203 | emit_move_insn (tmp_reg, GEN_INT (cfun->machine->current_frame_size - |
3204 | cfun->machine->callee_save_size)); | |
590e2636 MF |
3205 | emit_insn (gen_addsi3 (stack_pointer_rtx, frame_pointer_needed ? |
3206 | hard_frame_pointer_rtx : stack_pointer_rtx, | |
3207 | tmp_reg)); | |
ad89d820 | 3208 | offset = cfun->machine->callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
3209 | } |
3210 | else | |
3211 | { | |
3212 | if (frame_pointer_needed) | |
3213 | emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx); | |
ad89d820 | 3214 | offset = cfun->machine->current_frame_size - UNITS_PER_WORD; |
590e2636 MF |
3215 | } |
3216 | ||
3217 | /* Prevent reordering of saved a0 update and loading it back from | |
3218 | the save area. */ | |
3219 | if (crtl->calls_eh_return) | |
3220 | emit_insn (gen_blockage ()); | |
3221 | ||
3222 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
3223 | { | |
3224 | if (xtensa_call_save_reg(regno)) | |
3225 | { | |
3226 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
3227 | ||
3228 | offset -= UNITS_PER_WORD; | |
3229 | emit_move_insn (gen_rtx_REG (SImode, regno), | |
3230 | gen_frame_mem (SImode, x)); | |
3231 | } | |
3232 | } | |
3233 | ||
ad89d820 | 3234 | if (cfun->machine->current_frame_size > 0) |
590e2636 MF |
3235 | { |
3236 | if (frame_pointer_needed || /* always reachable with addi */ | |
ad89d820 MF |
3237 | cfun->machine->current_frame_size > 1024 || |
3238 | cfun->machine->current_frame_size <= 127) | |
590e2636 | 3239 | { |
ad89d820 MF |
3240 | if (cfun->machine->current_frame_size <= 127) |
3241 | offset = cfun->machine->current_frame_size; | |
590e2636 | 3242 | else |
ad89d820 | 3243 | offset = cfun->machine->callee_save_size; |
590e2636 MF |
3244 | |
3245 | emit_insn (gen_addsi3 (stack_pointer_rtx, | |
3246 | stack_pointer_rtx, | |
3247 | GEN_INT (offset))); | |
3248 | } | |
3249 | else | |
3250 | { | |
3251 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
3252 | emit_move_insn (tmp_reg, |
3253 | GEN_INT (cfun->machine->current_frame_size)); | |
590e2636 MF |
3254 | emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, |
3255 | tmp_reg)); | |
3256 | } | |
3257 | } | |
3258 | ||
3259 | if (crtl->calls_eh_return) | |
3260 | emit_insn (gen_add3_insn (stack_pointer_rtx, | |
3261 | stack_pointer_rtx, | |
3262 | EH_RETURN_STACKADJ_RTX)); | |
3263 | } | |
ad89d820 | 3264 | cfun->machine->epilogue_done = true; |
590e2636 | 3265 | emit_jump_insn (gen_return ()); |
03984308 BW |
3266 | } |
3267 | ||
ad89d820 MF |
3268 | bool |
3269 | xtensa_use_return_instruction_p (void) | |
3270 | { | |
3271 | if (!reload_completed) | |
3272 | return false; | |
3273 | if (TARGET_WINDOWED_ABI) | |
3274 | return true; | |
3275 | if (compute_frame_size (get_frame_size ()) == 0) | |
3276 | return true; | |
3277 | return cfun->machine->epilogue_done; | |
3278 | } | |
3279 | ||
590e2636 MF |
3280 | void |
3281 | xtensa_set_return_address (rtx address, rtx scratch) | |
3282 | { | |
3283 | HOST_WIDE_INT total_size = compute_frame_size (get_frame_size ()); | |
3284 | rtx frame = frame_pointer_needed ? | |
3285 | hard_frame_pointer_rtx : stack_pointer_rtx; | |
3286 | rtx a0_addr = plus_constant (Pmode, frame, | |
3287 | total_size - UNITS_PER_WORD); | |
f7df4a84 | 3288 | rtx note = gen_rtx_SET (gen_frame_mem (SImode, a0_addr), |
590e2636 MF |
3289 | gen_rtx_REG (SImode, A0_REG)); |
3290 | rtx insn; | |
3291 | ||
3292 | if (total_size > 1024) { | |
3293 | emit_move_insn (scratch, GEN_INT (total_size - UNITS_PER_WORD)); | |
3294 | emit_insn (gen_addsi3 (scratch, frame, scratch)); | |
3295 | a0_addr = scratch; | |
3296 | } | |
3297 | ||
3298 | insn = emit_move_insn (gen_frame_mem (SImode, a0_addr), address); | |
3299 | RTX_FRAME_RELATED_P (insn) = 1; | |
3300 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note); | |
3301 | } | |
03984308 | 3302 | |
0c14a54d | 3303 | rtx |
ffbc8796 | 3304 | xtensa_return_addr (int count, rtx frame) |
0c14a54d | 3305 | { |
7f0ee694 | 3306 | rtx result, retaddr, curaddr, label; |
0c14a54d | 3307 | |
590e2636 MF |
3308 | if (!TARGET_WINDOWED_ABI) |
3309 | { | |
3310 | if (count != 0) | |
3311 | return const0_rtx; | |
3312 | ||
3313 | return get_hard_reg_initial_val (Pmode, A0_REG); | |
3314 | } | |
3315 | ||
0c14a54d | 3316 | if (count == -1) |
f42f5a1b | 3317 | retaddr = gen_rtx_REG (Pmode, A0_REG); |
0c14a54d BW |
3318 | else |
3319 | { | |
0a81f074 | 3320 | rtx addr = plus_constant (Pmode, frame, -4 * UNITS_PER_WORD); |
0c14a54d BW |
3321 | addr = memory_address (Pmode, addr); |
3322 | retaddr = gen_reg_rtx (Pmode); | |
3323 | emit_move_insn (retaddr, gen_rtx_MEM (Pmode, addr)); | |
3324 | } | |
3325 | ||
3326 | /* The 2 most-significant bits of the return address on Xtensa hold | |
3327 | the register window size. To get the real return address, these | |
7f0ee694 BW |
3328 | bits must be replaced with the high bits from some address in the |
3329 | code. */ | |
3330 | ||
3331 | /* Get the 2 high bits of a local label in the code. */ | |
3332 | curaddr = gen_reg_rtx (Pmode); | |
3333 | label = gen_label_rtx (); | |
3334 | emit_label (label); | |
3335 | LABEL_PRESERVE_P (label) = 1; | |
3336 | emit_move_insn (curaddr, gen_rtx_LABEL_REF (Pmode, label)); | |
3337 | emit_insn (gen_lshrsi3 (curaddr, curaddr, GEN_INT (30))); | |
3338 | emit_insn (gen_ashlsi3 (curaddr, curaddr, GEN_INT (30))); | |
3339 | ||
3340 | /* Clear the 2 high bits of the return address. */ | |
0c14a54d | 3341 | result = gen_reg_rtx (Pmode); |
7f0ee694 BW |
3342 | emit_insn (gen_ashlsi3 (result, retaddr, GEN_INT (2))); |
3343 | emit_insn (gen_lshrsi3 (result, result, GEN_INT (2))); | |
3344 | ||
3345 | /* Combine them to get the result. */ | |
3346 | emit_insn (gen_iorsi3 (result, result, curaddr)); | |
0c14a54d BW |
3347 | return result; |
3348 | } | |
3349 | ||
d9886a9e L |
3350 | /* Disable the use of word-sized or smaller complex modes for structures, |
3351 | and for function arguments in particular, where they cause problems with | |
3352 | register a7. The xtensa_copy_incoming_a7 function assumes that there is | |
3353 | a single reference to an argument in a7, but with small complex modes the | |
3354 | real and imaginary components may be extracted separately, leading to two | |
3355 | uses of the register, only one of which would be replaced. */ | |
3356 | ||
3357 | static bool | |
ef4bddc2 | 3358 | xtensa_member_type_forces_blk (const_tree, machine_mode mode) |
d9886a9e L |
3359 | { |
3360 | return mode == CQImode || mode == CHImode; | |
3361 | } | |
0c14a54d | 3362 | |
03984308 | 3363 | /* Create the va_list data type. |
822e895c BW |
3364 | |
3365 | This structure is set up by __builtin_saveregs. The __va_reg field | |
3366 | points to a stack-allocated region holding the contents of the | |
3367 | incoming argument registers. The __va_ndx field is an index | |
3368 | initialized to the position of the first unnamed (variable) | |
3369 | argument. This same index is also used to address the arguments | |
3370 | passed in memory. Thus, the __va_stk field is initialized to point | |
3371 | to the position of the first argument in memory offset to account | |
3372 | for the arguments passed in registers and to account for the size | |
3373 | of the argument registers not being 16-byte aligned. E.G., there | |
3374 | are 6 argument registers of 4 bytes each, but we want the __va_ndx | |
3375 | for the first stack argument to have the maximal alignment of 16 | |
3376 | bytes, so we offset the __va_stk address by 32 bytes so that | |
3377 | __va_stk[32] references the first argument on the stack. */ | |
03984308 | 3378 | |
c35d187f RH |
3379 | static tree |
3380 | xtensa_build_builtin_va_list (void) | |
03984308 | 3381 | { |
540eaea8 | 3382 | tree f_stk, f_reg, f_ndx, record, type_decl; |
03984308 | 3383 | |
540eaea8 | 3384 | record = (*lang_hooks.types.make_type) (RECORD_TYPE); |
4c4bde29 AH |
3385 | type_decl = build_decl (BUILTINS_LOCATION, |
3386 | TYPE_DECL, get_identifier ("__va_list_tag"), record); | |
03984308 | 3387 | |
4c4bde29 AH |
3388 | f_stk = build_decl (BUILTINS_LOCATION, |
3389 | FIELD_DECL, get_identifier ("__va_stk"), | |
03984308 | 3390 | ptr_type_node); |
4c4bde29 AH |
3391 | f_reg = build_decl (BUILTINS_LOCATION, |
3392 | FIELD_DECL, get_identifier ("__va_reg"), | |
03984308 | 3393 | ptr_type_node); |
4c4bde29 AH |
3394 | f_ndx = build_decl (BUILTINS_LOCATION, |
3395 | FIELD_DECL, get_identifier ("__va_ndx"), | |
03984308 BW |
3396 | integer_type_node); |
3397 | ||
3398 | DECL_FIELD_CONTEXT (f_stk) = record; | |
3399 | DECL_FIELD_CONTEXT (f_reg) = record; | |
3400 | DECL_FIELD_CONTEXT (f_ndx) = record; | |
3401 | ||
0fd2eac2 | 3402 | TYPE_STUB_DECL (record) = type_decl; |
540eaea8 | 3403 | TYPE_NAME (record) = type_decl; |
03984308 | 3404 | TYPE_FIELDS (record) = f_stk; |
910ad8de NF |
3405 | DECL_CHAIN (f_stk) = f_reg; |
3406 | DECL_CHAIN (f_reg) = f_ndx; | |
03984308 BW |
3407 | |
3408 | layout_type (record); | |
3409 | return record; | |
3410 | } | |
3411 | ||
3412 | ||
3413 | /* Save the incoming argument registers on the stack. Returns the | |
638db43e | 3414 | address of the saved registers. */ |
03984308 | 3415 | |
4c45af42 | 3416 | static rtx |
ffbc8796 | 3417 | xtensa_builtin_saveregs (void) |
03984308 | 3418 | { |
e70312d4 | 3419 | rtx gp_regs; |
38173d38 | 3420 | int arg_words = crtl->args.info.arg_words; |
03984308 | 3421 | int gp_left = MAX_ARGS_IN_REGISTERS - arg_words; |
03984308 | 3422 | |
997b8b4d | 3423 | if (gp_left <= 0) |
03984308 BW |
3424 | return const0_rtx; |
3425 | ||
3bbc2af6 | 3426 | /* Allocate the general-purpose register space. */ |
03984308 BW |
3427 | gp_regs = assign_stack_local |
3428 | (BLKmode, MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD, -1); | |
540eaea8 | 3429 | set_mem_alias_set (gp_regs, get_varargs_alias_set ()); |
03984308 BW |
3430 | |
3431 | /* Now store the incoming registers. */ | |
590e2636 | 3432 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
997b8b4d | 3433 | cfun->machine->vararg_a7 = true; |
e70312d4 BW |
3434 | move_block_from_reg (GP_ARG_FIRST + arg_words, |
3435 | adjust_address (gp_regs, BLKmode, | |
3436 | arg_words * UNITS_PER_WORD), | |
3437 | gp_left); | |
590e2636 MF |
3438 | if (cfun->machine->vararg_a7_copy != 0) |
3439 | emit_insn_before (cfun->machine->vararg_a7_copy, get_insns ()); | |
03984308 BW |
3440 | |
3441 | return XEXP (gp_regs, 0); | |
3442 | } | |
3443 | ||
3444 | ||
3445 | /* Implement `va_start' for varargs and stdarg. We look at the | |
638db43e | 3446 | current function to fill in an initial va_list. */ |
03984308 | 3447 | |
d7bd8aeb | 3448 | static void |
ffbc8796 | 3449 | xtensa_va_start (tree valist, rtx nextarg ATTRIBUTE_UNUSED) |
03984308 BW |
3450 | { |
3451 | tree f_stk, stk; | |
3452 | tree f_reg, reg; | |
3453 | tree f_ndx, ndx; | |
3454 | tree t, u; | |
3455 | int arg_words; | |
3456 | ||
38173d38 | 3457 | arg_words = crtl->args.info.arg_words; |
03984308 BW |
3458 | |
3459 | f_stk = TYPE_FIELDS (va_list_type_node); | |
910ad8de NF |
3460 | f_reg = DECL_CHAIN (f_stk); |
3461 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3462 | |
47a25a46 | 3463 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, f_stk, NULL_TREE); |
fa1615d7 BW |
3464 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), |
3465 | f_reg, NULL_TREE); | |
3466 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3467 | f_ndx, NULL_TREE); | |
03984308 BW |
3468 | |
3469 | /* Call __builtin_saveregs; save the result in __va_reg */ | |
e70312d4 BW |
3470 | u = make_tree (sizetype, expand_builtin_saveregs ()); |
3471 | u = fold_convert (ptr_type_node, u); | |
726a989a | 3472 | t = build2 (MODIFY_EXPR, ptr_type_node, reg, u); |
03984308 BW |
3473 | TREE_SIDE_EFFECTS (t) = 1; |
3474 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3475 | ||
822e895c | 3476 | /* Set the __va_stk member to ($arg_ptr - 32). */ |
03984308 | 3477 | u = make_tree (ptr_type_node, virtual_incoming_args_rtx); |
5d49b6a7 | 3478 | u = fold_build_pointer_plus_hwi (u, -32); |
726a989a | 3479 | t = build2 (MODIFY_EXPR, ptr_type_node, stk, u); |
03984308 BW |
3480 | TREE_SIDE_EFFECTS (t) = 1; |
3481 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3482 | ||
822e895c BW |
3483 | /* Set the __va_ndx member. If the first variable argument is on |
3484 | the stack, adjust __va_ndx by 2 words to account for the extra | |
3485 | alignment offset for __va_stk. */ | |
3486 | if (arg_words >= MAX_ARGS_IN_REGISTERS) | |
3487 | arg_words += 2; | |
726a989a | 3488 | t = build2 (MODIFY_EXPR, integer_type_node, ndx, |
f4d3e7fd | 3489 | build_int_cst (integer_type_node, arg_words * UNITS_PER_WORD)); |
03984308 BW |
3490 | TREE_SIDE_EFFECTS (t) = 1; |
3491 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3492 | } | |
3493 | ||
3494 | ||
3495 | /* Implement `va_arg'. */ | |
3496 | ||
85d53c1d | 3497 | static tree |
726a989a RB |
3498 | xtensa_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
3499 | gimple_seq *post_p ATTRIBUTE_UNUSED) | |
03984308 BW |
3500 | { |
3501 | tree f_stk, stk; | |
3502 | tree f_reg, reg; | |
3503 | tree f_ndx, ndx; | |
85d53c1d RH |
3504 | tree type_size, array, orig_ndx, addr, size, va_size, t; |
3505 | tree lab_false, lab_over, lab_false2; | |
08b0dc1b RH |
3506 | bool indirect; |
3507 | ||
fde65a89 | 3508 | indirect = pass_va_arg_by_reference (type); |
08b0dc1b RH |
3509 | if (indirect) |
3510 | type = build_pointer_type (type); | |
03984308 | 3511 | |
3712281f BW |
3512 | /* Handle complex values as separate real and imaginary parts. */ |
3513 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
3514 | { | |
85d53c1d | 3515 | tree real_part, imag_part; |
3712281f | 3516 | |
85d53c1d RH |
3517 | real_part = xtensa_gimplify_va_arg_expr (valist, TREE_TYPE (type), |
3518 | pre_p, NULL); | |
3519 | real_part = get_initialized_tmp_var (real_part, pre_p, NULL); | |
3712281f | 3520 | |
fa1615d7 BW |
3521 | imag_part = xtensa_gimplify_va_arg_expr (unshare_expr (valist), |
3522 | TREE_TYPE (type), | |
85d53c1d RH |
3523 | pre_p, NULL); |
3524 | imag_part = get_initialized_tmp_var (imag_part, pre_p, NULL); | |
3712281f | 3525 | |
47a25a46 | 3526 | return build2 (COMPLEX_EXPR, type, real_part, imag_part); |
3712281f BW |
3527 | } |
3528 | ||
03984308 | 3529 | f_stk = TYPE_FIELDS (va_list_type_node); |
910ad8de NF |
3530 | f_reg = DECL_CHAIN (f_stk); |
3531 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3532 | |
fa1615d7 BW |
3533 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, |
3534 | f_stk, NULL_TREE); | |
3535 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), | |
3536 | f_reg, NULL_TREE); | |
3537 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3538 | f_ndx, NULL_TREE); | |
03984308 | 3539 | |
85d53c1d RH |
3540 | type_size = size_in_bytes (type); |
3541 | va_size = round_up (type_size, UNITS_PER_WORD); | |
3542 | gimplify_expr (&va_size, pre_p, NULL, is_gimple_val, fb_rvalue); | |
8be56275 | 3543 | |
03984308 | 3544 | |
822e895c | 3545 | /* First align __va_ndx if necessary for this arg: |
03984308 | 3546 | |
85d53c1d | 3547 | orig_ndx = (AP).__va_ndx; |
822e895c | 3548 | if (__alignof__ (TYPE) > 4 ) |
85d53c1d | 3549 | orig_ndx = ((orig_ndx + __alignof__ (TYPE) - 1) |
822e895c | 3550 | & -__alignof__ (TYPE)); */ |
03984308 | 3551 | |
85d53c1d RH |
3552 | orig_ndx = get_initialized_tmp_var (ndx, pre_p, NULL); |
3553 | ||
03984308 BW |
3554 | if (TYPE_ALIGN (type) > BITS_PER_WORD) |
3555 | { | |
d2348985 | 3556 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_UNIT; |
85d53c1d | 3557 | |
fa1615d7 | 3558 | t = build2 (PLUS_EXPR, integer_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3559 | build_int_cst (integer_type_node, align - 1)); |
3560 | t = build2 (BIT_AND_EXPR, integer_type_node, t, | |
3561 | build_int_cst (integer_type_node, -align)); | |
fa1615d7 | 3562 | gimplify_assign (unshare_expr (orig_ndx), t, pre_p); |
03984308 BW |
3563 | } |
3564 | ||
3565 | ||
3566 | /* Increment __va_ndx to point past the argument: | |
3567 | ||
85d53c1d | 3568 | (AP).__va_ndx = orig_ndx + __va_size (TYPE); */ |
03984308 | 3569 | |
85d53c1d | 3570 | t = fold_convert (integer_type_node, va_size); |
47a25a46 | 3571 | t = build2 (PLUS_EXPR, integer_type_node, orig_ndx, t); |
fa1615d7 | 3572 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 BW |
3573 | |
3574 | ||
3575 | /* Check if the argument is in registers: | |
3576 | ||
bcf88f9b | 3577 | if ((AP).__va_ndx <= __MAX_ARGS_IN_REGISTERS * 4 |
fe984136 | 3578 | && !must_pass_in_stack (type)) |
ffbc8796 | 3579 | __array = (AP).__va_reg; */ |
03984308 | 3580 | |
9b489f31 | 3581 | array = create_tmp_var (ptr_type_node); |
03984308 | 3582 | |
85d53c1d | 3583 | lab_over = NULL; |
4f53599c | 3584 | if (!must_pass_va_arg_in_stack (type)) |
bcf88f9b | 3585 | { |
4c4bde29 AH |
3586 | lab_false = create_artificial_label (UNKNOWN_LOCATION); |
3587 | lab_over = create_artificial_label (UNKNOWN_LOCATION); | |
85d53c1d | 3588 | |
fa1615d7 | 3589 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (ndx), |
f4d3e7fd BW |
3590 | build_int_cst (integer_type_node, |
3591 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3592 | t = build3 (COND_EXPR, void_type_node, t, |
3593 | build1 (GOTO_EXPR, void_type_node, lab_false), | |
3594 | NULL_TREE); | |
85d53c1d RH |
3595 | gimplify_and_add (t, pre_p); |
3596 | ||
fa1615d7 | 3597 | gimplify_assign (unshare_expr (array), reg, pre_p); |
85d53c1d | 3598 | |
47a25a46 | 3599 | t = build1 (GOTO_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3600 | gimplify_and_add (t, pre_p); |
3601 | ||
47a25a46 | 3602 | t = build1 (LABEL_EXPR, void_type_node, lab_false); |
85d53c1d | 3603 | gimplify_and_add (t, pre_p); |
bcf88f9b | 3604 | } |
03984308 | 3605 | |
85d53c1d | 3606 | |
03984308 BW |
3607 | /* ...otherwise, the argument is on the stack (never split between |
3608 | registers and the stack -- change __va_ndx if necessary): | |
3609 | ||
3610 | else | |
3611 | { | |
822e895c BW |
3612 | if (orig_ndx <= __MAX_ARGS_IN_REGISTERS * 4) |
3613 | (AP).__va_ndx = 32 + __va_size (TYPE); | |
03984308 | 3614 | __array = (AP).__va_stk; |
ffbc8796 | 3615 | } */ |
03984308 | 3616 | |
4c4bde29 | 3617 | lab_false2 = create_artificial_label (UNKNOWN_LOCATION); |
03984308 | 3618 | |
fa1615d7 | 3619 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3620 | build_int_cst (integer_type_node, |
3621 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3622 | t = build3 (COND_EXPR, void_type_node, t, |
3623 | build1 (GOTO_EXPR, void_type_node, lab_false2), | |
3624 | NULL_TREE); | |
85d53c1d | 3625 | gimplify_and_add (t, pre_p); |
03984308 | 3626 | |
fa1615d7 | 3627 | t = size_binop (PLUS_EXPR, unshare_expr (va_size), size_int (32)); |
85d53c1d | 3628 | t = fold_convert (integer_type_node, t); |
fa1615d7 | 3629 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 | 3630 | |
47a25a46 | 3631 | t = build1 (LABEL_EXPR, void_type_node, lab_false2); |
85d53c1d | 3632 | gimplify_and_add (t, pre_p); |
03984308 | 3633 | |
726a989a | 3634 | gimplify_assign (array, stk, pre_p); |
85d53c1d RH |
3635 | |
3636 | if (lab_over) | |
3637 | { | |
47a25a46 | 3638 | t = build1 (LABEL_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3639 | gimplify_and_add (t, pre_p); |
3640 | } | |
8be56275 | 3641 | |
03984308 BW |
3642 | |
3643 | /* Given the base array pointer (__array) and index to the subsequent | |
3644 | argument (__va_ndx), find the address: | |
3645 | ||
8be56275 BW |
3646 | __array + (AP).__va_ndx - (BYTES_BIG_ENDIAN && sizeof (TYPE) < 4 |
3647 | ? sizeof (TYPE) | |
3648 | : __va_size (TYPE)) | |
03984308 BW |
3649 | |
3650 | The results are endian-dependent because values smaller than one word | |
ffbc8796 | 3651 | are aligned differently. */ |
03984308 | 3652 | |
633e4eb4 | 3653 | |
85d91d5b | 3654 | if (BYTES_BIG_ENDIAN && TREE_CODE (type_size) == INTEGER_CST) |
8be56275 | 3655 | { |
fa1615d7 | 3656 | t = fold_build2 (GE_EXPR, boolean_type_node, unshare_expr (type_size), |
e70312d4 | 3657 | size_int (PARM_BOUNDARY / BITS_PER_UNIT)); |
fa1615d7 BW |
3658 | t = fold_build3 (COND_EXPR, sizetype, t, unshare_expr (va_size), |
3659 | unshare_expr (type_size)); | |
85d53c1d | 3660 | size = t; |
8be56275 | 3661 | } |
85d53c1d | 3662 | else |
fa1615d7 | 3663 | size = unshare_expr (va_size); |
85d53c1d | 3664 | |
fa1615d7 | 3665 | t = fold_convert (sizetype, unshare_expr (ndx)); |
f4d3e7fd | 3666 | t = build2 (MINUS_EXPR, sizetype, t, size); |
5d49b6a7 | 3667 | addr = fold_build_pointer_plus (unshare_expr (array), t); |
03984308 | 3668 | |
85d53c1d | 3669 | addr = fold_convert (build_pointer_type (type), addr); |
08b0dc1b | 3670 | if (indirect) |
d6e9821f RH |
3671 | addr = build_va_arg_indirect_ref (addr); |
3672 | return build_va_arg_indirect_ref (addr); | |
03984308 BW |
3673 | } |
3674 | ||
3675 | ||
09fa8841 BW |
3676 | /* Builtins. */ |
3677 | ||
3678 | enum xtensa_builtin | |
3679 | { | |
3680 | XTENSA_BUILTIN_UMULSIDI3, | |
3681 | XTENSA_BUILTIN_max | |
3682 | }; | |
3683 | ||
3684 | ||
3685 | static void | |
3686 | xtensa_init_builtins (void) | |
3687 | { | |
6a7a462c | 3688 | tree ftype, decl; |
09fa8841 BW |
3689 | |
3690 | ftype = build_function_type_list (unsigned_intDI_type_node, | |
3691 | unsigned_intSI_type_node, | |
3692 | unsigned_intSI_type_node, NULL_TREE); | |
3693 | ||
6a7a462c BW |
3694 | decl = add_builtin_function ("__builtin_umulsidi3", ftype, |
3695 | XTENSA_BUILTIN_UMULSIDI3, BUILT_IN_MD, | |
3696 | "__umulsidi3", NULL_TREE); | |
3697 | TREE_NOTHROW (decl) = 1; | |
3698 | TREE_READONLY (decl) = 1; | |
09fa8841 BW |
3699 | } |
3700 | ||
3701 | ||
3702 | static tree | |
f311c3b4 NF |
3703 | xtensa_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *args, |
3704 | bool ignore ATTRIBUTE_UNUSED) | |
09fa8841 | 3705 | { |
4d732405 | 3706 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
09fa8841 BW |
3707 | tree arg0, arg1; |
3708 | ||
6a7a462c | 3709 | switch (fcode) |
09fa8841 | 3710 | { |
6a7a462c | 3711 | case XTENSA_BUILTIN_UMULSIDI3: |
f311c3b4 NF |
3712 | arg0 = args[0]; |
3713 | arg1 = args[1]; | |
09fa8841 BW |
3714 | if ((TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST) |
3715 | || TARGET_MUL32_HIGH) | |
3716 | return fold_build2 (MULT_EXPR, unsigned_intDI_type_node, | |
3717 | fold_convert (unsigned_intDI_type_node, arg0), | |
3718 | fold_convert (unsigned_intDI_type_node, arg1)); | |
6a7a462c BW |
3719 | break; |
3720 | ||
6a7a462c BW |
3721 | default: |
3722 | internal_error ("bad builtin code"); | |
3723 | break; | |
09fa8841 BW |
3724 | } |
3725 | ||
09fa8841 BW |
3726 | return NULL; |
3727 | } | |
3728 | ||
3729 | ||
3730 | static rtx | |
3731 | xtensa_expand_builtin (tree exp, rtx target, | |
3732 | rtx subtarget ATTRIBUTE_UNUSED, | |
ef4bddc2 | 3733 | machine_mode mode ATTRIBUTE_UNUSED, |
09fa8841 BW |
3734 | int ignore) |
3735 | { | |
ec3643e8 | 3736 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
4d732405 | 3737 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
6a7a462c BW |
3738 | |
3739 | switch (fcode) | |
3740 | { | |
3741 | case XTENSA_BUILTIN_UMULSIDI3: | |
3742 | /* The umulsidi3 builtin is just a mechanism to avoid calling the real | |
3743 | __umulsidi3 function when the Xtensa configuration can directly | |
3744 | implement it. If not, just call the function. */ | |
3745 | return expand_call (exp, target, ignore); | |
09fa8841 | 3746 | |
6a7a462c BW |
3747 | default: |
3748 | internal_error ("bad builtin code"); | |
3749 | } | |
09fa8841 BW |
3750 | return NULL_RTX; |
3751 | } | |
3752 | ||
a6e508f9 | 3753 | /* Worker function for TARGET_PREFERRED_RELOAD_CLASS. */ |
09fa8841 | 3754 | |
a6e508f9 AS |
3755 | static reg_class_t |
3756 | xtensa_preferred_reload_class (rtx x, reg_class_t rclass) | |
a8cacfd2 | 3757 | { |
a6e508f9 | 3758 | if (CONSTANT_P (x) && CONST_DOUBLE_P (x)) |
a8cacfd2 BW |
3759 | return NO_REGS; |
3760 | ||
89f6025d BW |
3761 | /* Don't use the stack pointer or hard frame pointer for reloads! |
3762 | The hard frame pointer would normally be OK except that it may | |
3763 | briefly hold an incoming argument in the prologue, and reload | |
3764 | won't know that it is live because the hard frame pointer is | |
3765 | treated specially. */ | |
3766 | ||
0a2aaacc | 3767 | if (rclass == AR_REGS || rclass == GR_REGS) |
89f6025d | 3768 | return RL_REGS; |
a8cacfd2 | 3769 | |
0a2aaacc | 3770 | return rclass; |
a8cacfd2 BW |
3771 | } |
3772 | ||
a6e508f9 AS |
3773 | /* Worker function for TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. */ |
3774 | ||
3775 | static reg_class_t | |
3776 | xtensa_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
3777 | reg_class_t rclass) | |
3778 | { | |
3779 | /* Don't use the stack pointer or hard frame pointer for reloads! | |
3780 | The hard frame pointer would normally be OK except that it may | |
3781 | briefly hold an incoming argument in the prologue, and reload | |
3782 | won't know that it is live because the hard frame pointer is | |
3783 | treated specially. */ | |
3784 | ||
3785 | if (rclass == AR_REGS || rclass == GR_REGS) | |
3786 | return RL_REGS; | |
3787 | ||
3788 | return rclass; | |
3789 | } | |
3790 | ||
3791 | /* Worker function for TARGET_SECONDARY_RELOAD. */ | |
a8cacfd2 | 3792 | |
a6e508f9 | 3793 | static reg_class_t |
a87cf97e | 3794 | xtensa_secondary_reload (bool in_p, rtx x, reg_class_t rclass, |
ef4bddc2 | 3795 | machine_mode mode, secondary_reload_info *sri) |
03984308 BW |
3796 | { |
3797 | int regno; | |
3798 | ||
37fbe8a3 | 3799 | if (in_p && constantpool_mem_p (x)) |
03984308 | 3800 | { |
37fbe8a3 | 3801 | if (rclass == FP_REGS) |
89f6025d | 3802 | return RL_REGS; |
37fbe8a3 BW |
3803 | |
3804 | if (mode == QImode) | |
3805 | sri->icode = CODE_FOR_reloadqi_literal; | |
3806 | else if (mode == HImode) | |
3807 | sri->icode = CODE_FOR_reloadhi_literal; | |
03984308 BW |
3808 | } |
3809 | ||
37fbe8a3 | 3810 | regno = xt_true_regnum (x); |
03984308 | 3811 | if (ACC_REG_P (regno)) |
0a2aaacc KG |
3812 | return ((rclass == GR_REGS || rclass == RL_REGS) ? NO_REGS : RL_REGS); |
3813 | if (rclass == ACC_REG) | |
89f6025d | 3814 | return (GP_REG_P (regno) ? NO_REGS : RL_REGS); |
03984308 BW |
3815 | |
3816 | return NO_REGS; | |
3817 | } | |
3818 | ||
3819 | ||
3820 | void | |
ffbc8796 | 3821 | order_regs_for_local_alloc (void) |
03984308 BW |
3822 | { |
3823 | if (!leaf_function_p ()) | |
3824 | { | |
590e2636 MF |
3825 | static const int reg_nonleaf_alloc_order[FIRST_PSEUDO_REGISTER] = |
3826 | REG_ALLOC_ORDER; | |
3827 | static const int reg_nonleaf_alloc_order_call0[FIRST_PSEUDO_REGISTER] = | |
3828 | { | |
3829 | 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 12, 13, 14, 15, | |
3830 | 18, | |
3831 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, | |
3832 | 0, 1, 16, 17, | |
3833 | 35, | |
3834 | }; | |
3835 | ||
3836 | memcpy (reg_alloc_order, TARGET_WINDOWED_ABI ? | |
3837 | reg_nonleaf_alloc_order : reg_nonleaf_alloc_order_call0, | |
03984308 BW |
3838 | FIRST_PSEUDO_REGISTER * sizeof (int)); |
3839 | } | |
3840 | else | |
3841 | { | |
3842 | int i, num_arg_regs; | |
3843 | int nxt = 0; | |
3844 | ||
3bbc2af6 KH |
3845 | /* Use the AR registers in increasing order (skipping a0 and a1) |
3846 | but save the incoming argument registers for a last resort. */ | |
38173d38 | 3847 | num_arg_regs = crtl->args.info.arg_words; |
03984308 BW |
3848 | if (num_arg_regs > MAX_ARGS_IN_REGISTERS) |
3849 | num_arg_regs = MAX_ARGS_IN_REGISTERS; | |
3850 | for (i = GP_ARG_FIRST; i < 16 - num_arg_regs; i++) | |
3851 | reg_alloc_order[nxt++] = i + num_arg_regs; | |
3852 | for (i = 0; i < num_arg_regs; i++) | |
3853 | reg_alloc_order[nxt++] = GP_ARG_FIRST + i; | |
3854 | ||
3bbc2af6 | 3855 | /* List the coprocessor registers in order. */ |
985d0d50 BW |
3856 | for (i = 0; i < BR_REG_NUM; i++) |
3857 | reg_alloc_order[nxt++] = BR_REG_FIRST + i; | |
3858 | ||
3bbc2af6 | 3859 | /* List the FP registers in order for now. */ |
03984308 BW |
3860 | for (i = 0; i < 16; i++) |
3861 | reg_alloc_order[nxt++] = FP_REG_FIRST + i; | |
3862 | ||
638db43e | 3863 | /* GCC requires that we list *all* the registers.... */ |
03984308 BW |
3864 | reg_alloc_order[nxt++] = 0; /* a0 = return address */ |
3865 | reg_alloc_order[nxt++] = 1; /* a1 = stack pointer */ | |
3866 | reg_alloc_order[nxt++] = 16; /* pseudo frame pointer */ | |
3867 | reg_alloc_order[nxt++] = 17; /* pseudo arg pointer */ | |
3868 | ||
03984308 BW |
3869 | reg_alloc_order[nxt++] = ACC_REG_FIRST; /* MAC16 accumulator */ |
3870 | } | |
3871 | } | |
3872 | ||
3873 | ||
01abf342 BW |
3874 | /* Some Xtensa targets support multiple bss sections. If the section |
3875 | name ends with ".bss", add SECTION_BSS to the flags. */ | |
3876 | ||
3877 | static unsigned int | |
ffbc8796 | 3878 | xtensa_multibss_section_type_flags (tree decl, const char *name, int reloc) |
01abf342 BW |
3879 | { |
3880 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
3881 | const char *suffix; | |
3882 | ||
3883 | suffix = strrchr (name, '.'); | |
3884 | if (suffix && strcmp (suffix, ".bss") == 0) | |
3885 | { | |
3886 | if (!decl || (TREE_CODE (decl) == VAR_DECL | |
3887 | && DECL_INITIAL (decl) == NULL_TREE)) | |
3888 | flags |= SECTION_BSS; /* @nobits */ | |
3889 | else | |
d4ee4d25 | 3890 | warning (0, "only uninitialized variables can be placed in a " |
7e5baa7e | 3891 | "%<.bss%> section"); |
01abf342 BW |
3892 | } |
3893 | ||
3894 | return flags; | |
3895 | } | |
3896 | ||
3897 | ||
b64a1b53 RH |
3898 | /* The literal pool stays with the function. */ |
3899 | ||
d6b5193b | 3900 | static section * |
ef4bddc2 | 3901 | xtensa_select_rtx_section (machine_mode mode ATTRIBUTE_UNUSED, |
ffbc8796 BW |
3902 | rtx x ATTRIBUTE_UNUSED, |
3903 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 3904 | { |
d6b5193b | 3905 | return function_section (current_function_decl); |
b64a1b53 | 3906 | } |
fb49053f | 3907 | |
5378dda2 AS |
3908 | /* Worker function for TARGET_REGISTER_MOVE_COST. */ |
3909 | ||
3910 | static int | |
ef4bddc2 | 3911 | xtensa_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3912 | reg_class_t from, reg_class_t to) |
3913 | { | |
3914 | if (from == to && from != BR_REGS && to != BR_REGS) | |
3915 | return 2; | |
3916 | else if (reg_class_subset_p (from, AR_REGS) | |
3917 | && reg_class_subset_p (to, AR_REGS)) | |
3918 | return 2; | |
3919 | else if (reg_class_subset_p (from, AR_REGS) && to == ACC_REG) | |
3920 | return 3; | |
3921 | else if (from == ACC_REG && reg_class_subset_p (to, AR_REGS)) | |
3922 | return 3; | |
3923 | else | |
3924 | return 10; | |
3925 | } | |
3926 | ||
3927 | /* Worker function for TARGET_MEMORY_MOVE_COST. */ | |
3928 | ||
3929 | static int | |
ef4bddc2 | 3930 | xtensa_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3931 | reg_class_t rclass ATTRIBUTE_UNUSED, |
3932 | bool in ATTRIBUTE_UNUSED) | |
3933 | { | |
3934 | return 4; | |
3935 | } | |
ffbc8796 | 3936 | |
3c50106f RH |
3937 | /* Compute a (partial) cost for rtx X. Return true if the complete |
3938 | cost has been computed, and false if subexpressions should be | |
3939 | scanned. In either case, *TOTAL contains the cost result. */ | |
3940 | ||
3941 | static bool | |
e548c9df AM |
3942 | xtensa_rtx_costs (rtx x, machine_mode mode, int outer_code, |
3943 | int opno ATTRIBUTE_UNUSED, | |
ccd02e73 | 3944 | int *total, bool speed) |
3c50106f | 3945 | { |
e548c9df AM |
3946 | int code = GET_CODE (x); |
3947 | ||
3c50106f RH |
3948 | switch (code) |
3949 | { | |
3950 | case CONST_INT: | |
3951 | switch (outer_code) | |
3952 | { | |
3953 | case SET: | |
3954 | if (xtensa_simm12b (INTVAL (x))) | |
3955 | { | |
3956 | *total = 4; | |
3957 | return true; | |
3958 | } | |
3959 | break; | |
3960 | case PLUS: | |
3961 | if (xtensa_simm8 (INTVAL (x)) | |
3962 | || xtensa_simm8x256 (INTVAL (x))) | |
3963 | { | |
3964 | *total = 0; | |
3965 | return true; | |
3966 | } | |
3967 | break; | |
3968 | case AND: | |
3969 | if (xtensa_mask_immediate (INTVAL (x))) | |
3970 | { | |
3971 | *total = 0; | |
3972 | return true; | |
3973 | } | |
3974 | break; | |
3975 | case COMPARE: | |
3976 | if ((INTVAL (x) == 0) || xtensa_b4const (INTVAL (x))) | |
3977 | { | |
3978 | *total = 0; | |
3979 | return true; | |
3980 | } | |
3981 | break; | |
3982 | case ASHIFT: | |
3983 | case ASHIFTRT: | |
3984 | case LSHIFTRT: | |
3985 | case ROTATE: | |
3986 | case ROTATERT: | |
3bbc2af6 | 3987 | /* No way to tell if X is the 2nd operand so be conservative. */ |
3c50106f RH |
3988 | default: break; |
3989 | } | |
3990 | if (xtensa_simm12b (INTVAL (x))) | |
3991 | *total = 5; | |
f42f5a1b BW |
3992 | else if (TARGET_CONST16) |
3993 | *total = COSTS_N_INSNS (2); | |
3c50106f RH |
3994 | else |
3995 | *total = 6; | |
3996 | return true; | |
3997 | ||
3998 | case CONST: | |
3999 | case LABEL_REF: | |
4000 | case SYMBOL_REF: | |
f42f5a1b BW |
4001 | if (TARGET_CONST16) |
4002 | *total = COSTS_N_INSNS (2); | |
4003 | else | |
4004 | *total = 5; | |
3c50106f RH |
4005 | return true; |
4006 | ||
4007 | case CONST_DOUBLE: | |
f42f5a1b BW |
4008 | if (TARGET_CONST16) |
4009 | *total = COSTS_N_INSNS (4); | |
4010 | else | |
4011 | *total = 7; | |
3c50106f RH |
4012 | return true; |
4013 | ||
4014 | case MEM: | |
4015 | { | |
4016 | int num_words = | |
e548c9df | 4017 | (GET_MODE_SIZE (mode) > UNITS_PER_WORD) ? 2 : 1; |
3c50106f | 4018 | |
e548c9df | 4019 | if (memory_address_p (mode, XEXP ((x), 0))) |
3c50106f RH |
4020 | *total = COSTS_N_INSNS (num_words); |
4021 | else | |
4022 | *total = COSTS_N_INSNS (2*num_words); | |
4023 | return true; | |
4024 | } | |
4025 | ||
4026 | case FFS: | |
09fa8841 | 4027 | case CTZ: |
3c50106f RH |
4028 | *total = COSTS_N_INSNS (TARGET_NSA ? 5 : 50); |
4029 | return true; | |
4030 | ||
09fa8841 | 4031 | case CLZ: |
ccd02e73 | 4032 | case CLRSB: |
09fa8841 BW |
4033 | *total = COSTS_N_INSNS (TARGET_NSA ? 1 : 50); |
4034 | return true; | |
4035 | ||
ccd02e73 TJJS |
4036 | case BSWAP: |
4037 | *total = COSTS_N_INSNS (mode == HImode ? 3 : 5); | |
4038 | return true; | |
4039 | ||
3c50106f | 4040 | case NOT: |
e548c9df | 4041 | *total = COSTS_N_INSNS (mode == DImode ? 3 : 2); |
3c50106f RH |
4042 | return true; |
4043 | ||
4044 | case AND: | |
4045 | case IOR: | |
4046 | case XOR: | |
e548c9df | 4047 | if (mode == DImode) |
3c50106f RH |
4048 | *total = COSTS_N_INSNS (2); |
4049 | else | |
4050 | *total = COSTS_N_INSNS (1); | |
4051 | return true; | |
4052 | ||
4053 | case ASHIFT: | |
4054 | case ASHIFTRT: | |
4055 | case LSHIFTRT: | |
e548c9df | 4056 | if (mode == DImode) |
3c50106f RH |
4057 | *total = COSTS_N_INSNS (50); |
4058 | else | |
4059 | *total = COSTS_N_INSNS (1); | |
4060 | return true; | |
4061 | ||
4062 | case ABS: | |
ccd02e73 | 4063 | case NEG: |
3c50106f | 4064 | { |
e548c9df | 4065 | if (mode == SFmode) |
3c50106f | 4066 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 4067 | else if (mode == DFmode) |
3c50106f | 4068 | *total = COSTS_N_INSNS (50); |
ccd02e73 | 4069 | else if (mode == DImode) |
3c50106f | 4070 | *total = COSTS_N_INSNS (4); |
ccd02e73 TJJS |
4071 | else |
4072 | *total = COSTS_N_INSNS (1); | |
3c50106f RH |
4073 | return true; |
4074 | } | |
4075 | ||
4076 | case PLUS: | |
4077 | case MINUS: | |
4078 | { | |
e548c9df | 4079 | if (mode == SFmode) |
3c50106f | 4080 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 4081 | else if (mode == DFmode || mode == DImode) |
3c50106f RH |
4082 | *total = COSTS_N_INSNS (50); |
4083 | else | |
4084 | *total = COSTS_N_INSNS (1); | |
4085 | return true; | |
4086 | } | |
4087 | ||
3c50106f RH |
4088 | case MULT: |
4089 | { | |
e548c9df | 4090 | if (mode == SFmode) |
3c50106f | 4091 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); |
e548c9df | 4092 | else if (mode == DFmode) |
3c50106f | 4093 | *total = COSTS_N_INSNS (50); |
e548c9df | 4094 | else if (mode == DImode) |
09fa8841 | 4095 | *total = COSTS_N_INSNS (TARGET_MUL32_HIGH ? 10 : 50); |
3c50106f RH |
4096 | else if (TARGET_MUL32) |
4097 | *total = COSTS_N_INSNS (4); | |
4098 | else if (TARGET_MAC16) | |
4099 | *total = COSTS_N_INSNS (16); | |
4100 | else if (TARGET_MUL16) | |
4101 | *total = COSTS_N_INSNS (12); | |
4102 | else | |
4103 | *total = COSTS_N_INSNS (50); | |
4104 | return true; | |
4105 | } | |
4106 | ||
4107 | case DIV: | |
4108 | case MOD: | |
4109 | { | |
e548c9df | 4110 | if (mode == SFmode) |
3c50106f RH |
4111 | { |
4112 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); | |
4113 | return true; | |
4114 | } | |
e548c9df | 4115 | else if (mode == DFmode) |
3c50106f RH |
4116 | { |
4117 | *total = COSTS_N_INSNS (50); | |
4118 | return true; | |
4119 | } | |
4120 | } | |
3bbc2af6 | 4121 | /* Fall through. */ |
3c50106f RH |
4122 | |
4123 | case UDIV: | |
4124 | case UMOD: | |
4125 | { | |
e548c9df | 4126 | if (mode == DImode) |
ccd02e73 | 4127 | *total = COSTS_N_INSNS (speed ? 100 : 50); |
3c50106f RH |
4128 | else if (TARGET_DIV32) |
4129 | *total = COSTS_N_INSNS (32); | |
4130 | else | |
ccd02e73 | 4131 | *total = COSTS_N_INSNS (speed ? 100 : 50); |
3c50106f RH |
4132 | return true; |
4133 | } | |
4134 | ||
4135 | case SQRT: | |
e548c9df | 4136 | if (mode == SFmode) |
3c50106f RH |
4137 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); |
4138 | else | |
4139 | *total = COSTS_N_INSNS (50); | |
4140 | return true; | |
4141 | ||
4142 | case SMIN: | |
4143 | case UMIN: | |
4144 | case SMAX: | |
4145 | case UMAX: | |
4146 | *total = COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); | |
4147 | return true; | |
4148 | ||
4149 | case SIGN_EXTRACT: | |
4150 | case SIGN_EXTEND: | |
4151 | *total = COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); | |
4152 | return true; | |
4153 | ||
4154 | case ZERO_EXTRACT: | |
4155 | case ZERO_EXTEND: | |
4156 | *total = COSTS_N_INSNS (1); | |
4157 | return true; | |
4158 | ||
4159 | default: | |
4160 | return false; | |
4161 | } | |
4162 | } | |
4163 | ||
ccd02e73 TJJS |
4164 | static bool |
4165 | xtensa_is_insn_L32R_p(const rtx_insn *insn) | |
4166 | { | |
4167 | rtx x = PATTERN (insn); | |
4168 | ||
4169 | if (GET_CODE (x) == SET) | |
4170 | { | |
4171 | x = XEXP (x, 1); | |
4172 | if (GET_CODE (x) == MEM) | |
4173 | { | |
4174 | x = XEXP (x, 0); | |
4175 | return (GET_CODE (x) == SYMBOL_REF || CONST_INT_P (x)) | |
4176 | && CONSTANT_POOL_ADDRESS_P (x); | |
4177 | } | |
4178 | } | |
4179 | ||
4180 | return false; | |
4181 | } | |
4182 | ||
4183 | /* Compute a relative costs of RTL insns. This is necessary in order to | |
4184 | achieve better RTL insn splitting/combination result. */ | |
4185 | ||
4186 | static int | |
4187 | xtensa_insn_cost (rtx_insn *insn, bool speed) | |
4188 | { | |
4189 | if (!(recog_memoized (insn) < 0)) | |
4190 | { | |
4191 | int len = get_attr_length (insn), n = (len + 2) / 3; | |
4192 | ||
4193 | if (len == 0) | |
4194 | return COSTS_N_INSNS (0); | |
4195 | ||
4196 | if (speed) /* For speed cost. */ | |
4197 | { | |
4198 | /* "L32R" may be particular slow (implementation-dependent). */ | |
4199 | if (xtensa_is_insn_L32R_p (insn)) | |
4200 | return COSTS_N_INSNS (1 + xtensa_extra_l32r_costs); | |
4201 | ||
4202 | /* Cost based on the pipeline model. */ | |
4203 | switch (get_attr_type (insn)) | |
4204 | { | |
4205 | case TYPE_STORE: | |
4206 | case TYPE_MOVE: | |
4207 | case TYPE_ARITH: | |
4208 | case TYPE_MULTI: | |
4209 | case TYPE_NOP: | |
4210 | case TYPE_FSTORE: | |
4211 | return COSTS_N_INSNS (n); | |
4212 | ||
4213 | case TYPE_LOAD: | |
4214 | return COSTS_N_INSNS (n - 1 + 2); | |
4215 | ||
4216 | case TYPE_JUMP: | |
4217 | case TYPE_CALL: | |
4218 | return COSTS_N_INSNS (n - 1 + 3); | |
4219 | ||
4220 | case TYPE_FCONV: | |
4221 | case TYPE_FLOAD: | |
4222 | case TYPE_MUL16: | |
4223 | case TYPE_MUL32: | |
4224 | case TYPE_RSR: | |
4225 | return COSTS_N_INSNS (n * 2); | |
4226 | ||
4227 | case TYPE_FMADD: | |
4228 | return COSTS_N_INSNS (n * 4); | |
4229 | ||
4230 | case TYPE_DIV32: | |
4231 | return COSTS_N_INSNS (n * 16); | |
4232 | ||
4233 | default: | |
4234 | break; | |
4235 | } | |
4236 | } | |
4237 | else /* For size cost. */ | |
4238 | { | |
4239 | /* Cost based on the instruction length. */ | |
4240 | if (get_attr_type (insn) != TYPE_UNKNOWN) | |
4241 | { | |
4242 | /* "L32R" itself plus constant in litpool. */ | |
4243 | if (xtensa_is_insn_L32R_p (insn)) | |
4244 | return COSTS_N_INSNS (2) + 1; | |
4245 | ||
4246 | /* Consider ".n" short instructions. */ | |
4247 | return COSTS_N_INSNS (n) - (n * 3 - len); | |
4248 | } | |
4249 | } | |
4250 | } | |
4251 | ||
4252 | /* Fall back. */ | |
4253 | return pattern_cost (PATTERN (insn), speed); | |
4254 | } | |
4255 | ||
bd5bd7ac KH |
4256 | /* Worker function for TARGET_RETURN_IN_MEMORY. */ |
4257 | ||
4c45af42 | 4258 | static bool |
586de218 | 4259 | xtensa_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) |
4c45af42 KH |
4260 | { |
4261 | return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) | |
4262 | > 4 * UNITS_PER_WORD); | |
4263 | } | |
4264 | ||
e2b2d01e AS |
4265 | /* Worker function for TARGET_FUNCTION_VALUE. */ |
4266 | ||
4267 | rtx | |
4268 | xtensa_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, | |
4269 | bool outgoing) | |
4270 | { | |
4271 | return gen_rtx_REG ((INTEGRAL_TYPE_P (valtype) | |
4272 | && TYPE_PRECISION (valtype) < BITS_PER_WORD) | |
4273 | ? SImode : TYPE_MODE (valtype), | |
4274 | outgoing ? GP_OUTGOING_RETURN : GP_RETURN); | |
4275 | } | |
7f0ee694 | 4276 | |
dde8a3a4 AS |
4277 | /* Worker function for TARGET_LIBCALL_VALUE. */ |
4278 | ||
4279 | static rtx | |
ef4bddc2 | 4280 | xtensa_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
dde8a3a4 AS |
4281 | { |
4282 | return gen_rtx_REG ((GET_MODE_CLASS (mode) == MODE_INT | |
4283 | && GET_MODE_SIZE (mode) < UNITS_PER_WORD) | |
4284 | ? SImode : mode, GP_RETURN); | |
4285 | } | |
4286 | ||
4287 | /* Worker function TARGET_FUNCTION_VALUE_REGNO_P. */ | |
4288 | ||
4289 | static bool | |
4290 | xtensa_function_value_regno_p (const unsigned int regno) | |
4291 | { | |
4292 | return (regno == GP_RETURN); | |
4293 | } | |
4294 | ||
2b4fa409 RH |
4295 | /* The static chain is passed in memory. Provide rtx giving 'mem' |
4296 | expressions that denote where they are stored. */ | |
4297 | ||
4298 | static rtx | |
c21df29b | 4299 | xtensa_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
2b4fa409 | 4300 | { |
590e2636 MF |
4301 | if (TARGET_WINDOWED_ABI) |
4302 | { | |
4303 | rtx base = incoming_p ? arg_pointer_rtx : stack_pointer_rtx; | |
4304 | return gen_frame_mem (Pmode, plus_constant (Pmode, base, | |
4305 | -5 * UNITS_PER_WORD)); | |
4306 | } | |
4307 | else | |
4308 | return gen_rtx_REG (Pmode, A8_REG); | |
2b4fa409 RH |
4309 | } |
4310 | ||
4311 | ||
7f0ee694 BW |
4312 | /* TRAMPOLINE_TEMPLATE: For Xtensa, the trampoline must perform an ENTRY |
4313 | instruction with a minimal stack frame in order to get some free | |
4314 | registers. Once the actual call target is known, the proper stack frame | |
4315 | size is extracted from the ENTRY instruction at the target and the | |
4316 | current frame is adjusted to match. The trampoline then transfers | |
4317 | control to the instruction following the ENTRY at the target. Note: | |
4318 | this assumes that the target begins with an ENTRY instruction. */ | |
4319 | ||
3c1229cb RH |
4320 | static void |
4321 | xtensa_asm_trampoline_template (FILE *stream) | |
7f0ee694 BW |
4322 | { |
4323 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); | |
4324 | ||
4325 | fprintf (stream, "\t.begin no-transform\n"); | |
7f0ee694 | 4326 | |
590e2636 | 4327 | if (TARGET_WINDOWED_ABI) |
7f0ee694 | 4328 | { |
590e2636 | 4329 | fprintf (stream, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); |
7f0ee694 | 4330 | |
590e2636 MF |
4331 | if (use_call0) |
4332 | { | |
4333 | /* Save the return address. */ | |
4334 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4335 | |
590e2636 MF |
4336 | /* Use a CALL0 instruction to skip past the constants and in the |
4337 | process get the PC into A0. This allows PC-relative access to | |
4338 | the constants without relying on L32R. */ | |
4339 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4340 | } | |
4341 | else | |
4342 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4343 | |
590e2636 MF |
4344 | fprintf (stream, "\t.align\t4\n"); |
4345 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4346 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4347 | fprintf (stream, ".Lskipconsts:\n"); | |
4348 | ||
4349 | /* Load the static chain and function address from the trampoline. */ | |
4350 | if (use_call0) | |
4351 | { | |
4352 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4353 | fprintf (stream, "\tl32i\ta9, a0, 0\n"); | |
4354 | fprintf (stream, "\tl32i\ta8, a0, 4\n"); | |
4355 | } | |
4356 | else | |
4357 | { | |
4358 | fprintf (stream, "\tl32r\ta9, .Lchainval\n"); | |
4359 | fprintf (stream, "\tl32r\ta8, .Lfnaddr\n"); | |
4360 | } | |
4361 | ||
4362 | /* Store the static chain. */ | |
4363 | fprintf (stream, "\ts32i\ta9, sp, %d\n", MIN_FRAME_SIZE - 20); | |
4364 | ||
4365 | /* Set the proper stack pointer value. */ | |
4366 | fprintf (stream, "\tl32i\ta9, a8, 0\n"); | |
4367 | fprintf (stream, "\textui\ta9, a9, %d, 12\n", | |
4368 | TARGET_BIG_ENDIAN ? 8 : 12); | |
4369 | fprintf (stream, "\tslli\ta9, a9, 3\n"); | |
4370 | fprintf (stream, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); | |
4371 | fprintf (stream, "\tsub\ta9, sp, a9\n"); | |
4372 | fprintf (stream, "\tmovsp\tsp, a9\n"); | |
4373 | ||
4374 | if (use_call0) | |
4375 | /* Restore the return address. */ | |
4376 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4377 | ||
4378 | /* Jump to the instruction following the ENTRY. */ | |
4379 | fprintf (stream, "\taddi\ta8, a8, 3\n"); | |
4380 | fprintf (stream, "\tjx\ta8\n"); | |
4381 | ||
4382 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ | |
4383 | if (use_call0) | |
4384 | fprintf (stream, "\t.byte\t0\n"); | |
4385 | else | |
4386 | fprintf (stream, "\tnop\n"); | |
7f0ee694 BW |
4387 | } |
4388 | else | |
4389 | { | |
590e2636 MF |
4390 | if (use_call0) |
4391 | { | |
4392 | /* Save the return address. */ | |
4393 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4394 | |
590e2636 MF |
4395 | /* Use a CALL0 instruction to skip past the constants and in the |
4396 | process get the PC into A0. This allows PC-relative access to | |
4397 | the constants without relying on L32R. */ | |
4398 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4399 | } | |
4400 | else | |
4401 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4402 | |
590e2636 MF |
4403 | fprintf (stream, "\t.align\t4\n"); |
4404 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4405 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4406 | fprintf (stream, ".Lskipconsts:\n"); | |
7f0ee694 | 4407 | |
590e2636 MF |
4408 | /* Load the static chain and function address from the trampoline. */ |
4409 | if (use_call0) | |
4410 | { | |
4411 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4412 | fprintf (stream, "\tl32i\ta8, a0, 0\n"); | |
4413 | fprintf (stream, "\tl32i\ta9, a0, 4\n"); | |
4414 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4415 | } | |
4416 | else | |
4417 | { | |
4418 | fprintf (stream, "\tl32r\ta8, .Lchainval\n"); | |
4419 | fprintf (stream, "\tl32r\ta9, .Lfnaddr\n"); | |
4420 | } | |
4421 | fprintf (stream, "\tjx\ta9\n"); | |
7f0ee694 | 4422 | |
590e2636 MF |
4423 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ |
4424 | if (use_call0) | |
4425 | fprintf (stream, "\t.byte\t0\n"); | |
4426 | else | |
4427 | fprintf (stream, "\tnop\n"); | |
4428 | } | |
7f0ee694 BW |
4429 | fprintf (stream, "\t.end no-transform\n"); |
4430 | } | |
4431 | ||
3c1229cb RH |
4432 | static void |
4433 | xtensa_trampoline_init (rtx m_tramp, tree fndecl, rtx chain) | |
7f0ee694 | 4434 | { |
3c1229cb | 4435 | rtx func = XEXP (DECL_RTL (fndecl), 0); |
7f0ee694 | 4436 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); |
590e2636 MF |
4437 | int chain_off; |
4438 | int func_off; | |
4439 | ||
4440 | if (TARGET_WINDOWED_ABI) | |
4441 | { | |
4442 | chain_off = use_call0 ? 12 : 8; | |
4443 | func_off = use_call0 ? 16 : 12; | |
4444 | } | |
4445 | else | |
4446 | { | |
4447 | chain_off = use_call0 ? 8 : 4; | |
4448 | func_off = use_call0 ? 12 : 8; | |
4449 | } | |
3c1229cb RH |
4450 | |
4451 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
4452 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
4453 | ||
4454 | emit_move_insn (adjust_address (m_tramp, SImode, chain_off), chain); | |
4455 | emit_move_insn (adjust_address (m_tramp, SImode, func_off), func); | |
7f0ee694 | 4456 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_sync_caches"), |
db69559b | 4457 | LCT_NORMAL, VOIDmode, XEXP (m_tramp, 0), Pmode); |
7f0ee694 BW |
4458 | } |
4459 | ||
1a627b35 RS |
4460 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
4461 | ||
4462 | static bool | |
ef4bddc2 | 4463 | xtensa_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
1a627b35 RS |
4464 | { |
4465 | return !xtensa_tls_referenced_p (x); | |
4466 | } | |
7f0ee694 | 4467 | |
6383386a FY |
4468 | /* Implement TARGET_CAN_USE_DOLOOP_P. */ |
4469 | ||
4470 | static bool | |
4471 | xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
4472 | unsigned int loop_depth, bool entered_at_top) | |
4473 | { | |
4474 | /* Considering limitations in the hardware, only use doloop | |
4475 | for innermost loops which must be entered from the top. */ | |
4476 | if (loop_depth > 1 || !entered_at_top) | |
4477 | return false; | |
4478 | ||
4479 | return true; | |
4480 | } | |
4481 | ||
4482 | /* NULL if INSN insn is valid within a low-overhead loop. | |
4483 | Otherwise return why doloop cannot be applied. */ | |
4484 | ||
4485 | static const char * | |
4486 | xtensa_invalid_within_doloop (const rtx_insn *insn) | |
4487 | { | |
4488 | if (CALL_P (insn)) | |
4489 | return "Function call in the loop."; | |
4490 | ||
4491 | if (JUMP_P (insn) && INSN_CODE (insn) == CODE_FOR_return) | |
4492 | return "Return from a call instruction in the loop."; | |
4493 | ||
4494 | return NULL; | |
4495 | } | |
4496 | ||
4497 | /* Optimize LOOP. */ | |
4498 | ||
4499 | static bool | |
4500 | hwloop_optimize (hwloop_info loop) | |
4501 | { | |
4502 | int i; | |
4503 | edge entry_edge; | |
4504 | basic_block entry_bb; | |
4505 | rtx iter_reg; | |
4506 | rtx_insn *insn, *seq, *entry_after; | |
4507 | ||
4508 | if (loop->depth > 1) | |
4509 | { | |
4510 | if (dump_file) | |
4511 | fprintf (dump_file, ";; loop %d is not innermost\n", | |
4512 | loop->loop_no); | |
4513 | return false; | |
4514 | } | |
4515 | ||
4516 | if (!loop->incoming_dest) | |
4517 | { | |
4518 | if (dump_file) | |
4519 | fprintf (dump_file, ";; loop %d has more than one entry\n", | |
4520 | loop->loop_no); | |
4521 | return false; | |
4522 | } | |
4523 | ||
4524 | if (loop->incoming_dest != loop->head) | |
4525 | { | |
4526 | if (dump_file) | |
4527 | fprintf (dump_file, ";; loop %d is not entered from head\n", | |
4528 | loop->loop_no); | |
4529 | return false; | |
4530 | } | |
4531 | ||
4532 | if (loop->has_call || loop->has_asm) | |
4533 | { | |
4534 | if (dump_file) | |
4535 | fprintf (dump_file, ";; loop %d has invalid insn\n", | |
4536 | loop->loop_no); | |
4537 | return false; | |
4538 | } | |
4539 | ||
4540 | /* Scan all the blocks to make sure they don't use iter_reg. */ | |
4541 | if (loop->iter_reg_used || loop->iter_reg_used_outside) | |
4542 | { | |
4543 | if (dump_file) | |
4544 | fprintf (dump_file, ";; loop %d uses iterator\n", | |
4545 | loop->loop_no); | |
4546 | return false; | |
4547 | } | |
4548 | ||
4549 | /* Check if start_label appears before doloop_end. */ | |
4550 | insn = loop->start_label; | |
4551 | while (insn && insn != loop->loop_end) | |
4552 | insn = NEXT_INSN (insn); | |
4553 | ||
4554 | if (!insn) | |
4555 | { | |
4556 | if (dump_file) | |
4557 | fprintf (dump_file, ";; loop %d start_label not before loop_end\n", | |
4558 | loop->loop_no); | |
4559 | return false; | |
4560 | } | |
4561 | ||
4562 | /* Get the loop iteration register. */ | |
4563 | iter_reg = loop->iter_reg; | |
4564 | ||
4565 | gcc_assert (REG_P (iter_reg)); | |
4566 | ||
4567 | entry_edge = NULL; | |
4568 | ||
4569 | FOR_EACH_VEC_SAFE_ELT (loop->incoming, i, entry_edge) | |
4570 | if (entry_edge->flags & EDGE_FALLTHRU) | |
4571 | break; | |
4572 | ||
4573 | if (entry_edge == NULL) | |
4574 | return false; | |
4575 | ||
4576 | /* Place the zero_cost_loop_start instruction before the loop. */ | |
4577 | entry_bb = entry_edge->src; | |
4578 | ||
4579 | start_sequence (); | |
4580 | ||
4581 | insn = emit_insn (gen_zero_cost_loop_start (loop->iter_reg, | |
4582 | loop->start_label, | |
4583 | loop->iter_reg)); | |
4584 | ||
4585 | seq = get_insns (); | |
4586 | ||
d7326aaf MF |
4587 | entry_after = BB_END (entry_bb); |
4588 | if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1 | |
4589 | || !entry_after) | |
6383386a FY |
4590 | { |
4591 | basic_block new_bb; | |
4592 | edge e; | |
4593 | edge_iterator ei; | |
4594 | ||
4595 | emit_insn_before (seq, BB_HEAD (loop->head)); | |
4596 | seq = emit_label_before (gen_label_rtx (), seq); | |
4597 | new_bb = create_basic_block (seq, insn, entry_bb); | |
4598 | FOR_EACH_EDGE (e, ei, loop->incoming) | |
4599 | { | |
4600 | if (!(e->flags & EDGE_FALLTHRU)) | |
4601 | redirect_edge_and_branch_force (e, new_bb); | |
4602 | else | |
4603 | redirect_edge_succ (e, new_bb); | |
4604 | } | |
4605 | ||
4606 | make_edge (new_bb, loop->head, 0); | |
4607 | } | |
4608 | else | |
4609 | { | |
6383386a FY |
4610 | while (DEBUG_INSN_P (entry_after) |
4611 | || (NOTE_P (entry_after) | |
00b94487 | 4612 | && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK)) |
6383386a FY |
4613 | entry_after = PREV_INSN (entry_after); |
4614 | ||
4615 | emit_insn_after (seq, entry_after); | |
4616 | } | |
4617 | ||
4618 | end_sequence (); | |
4619 | ||
4620 | return true; | |
4621 | } | |
4622 | ||
4623 | /* A callback for the hw-doloop pass. Called when a loop we have discovered | |
4624 | turns out not to be optimizable; we have to split the loop_end pattern into | |
4625 | a subtract and a test. */ | |
4626 | ||
4627 | static void | |
4628 | hwloop_fail (hwloop_info loop) | |
4629 | { | |
4630 | rtx test; | |
4631 | rtx_insn *insn = loop->loop_end; | |
4632 | ||
4633 | emit_insn_before (gen_addsi3 (loop->iter_reg, | |
4634 | loop->iter_reg, | |
4635 | constm1_rtx), | |
4636 | loop->loop_end); | |
4637 | ||
4638 | test = gen_rtx_NE (VOIDmode, loop->iter_reg, const0_rtx); | |
4639 | insn = emit_jump_insn_before (gen_cbranchsi4 (test, | |
4640 | loop->iter_reg, const0_rtx, | |
4641 | loop->start_label), | |
4642 | loop->loop_end); | |
4643 | ||
4644 | JUMP_LABEL (insn) = loop->start_label; | |
4645 | LABEL_NUSES (loop->start_label)++; | |
4646 | delete_insn (loop->loop_end); | |
4647 | } | |
4648 | ||
4649 | /* A callback for the hw-doloop pass. This function examines INSN; if | |
4650 | it is a doloop_end pattern we recognize, return the reg rtx for the | |
4651 | loop counter. Otherwise, return NULL_RTX. */ | |
4652 | ||
4653 | static rtx | |
4654 | hwloop_pattern_reg (rtx_insn *insn) | |
4655 | { | |
4656 | rtx reg; | |
4657 | ||
4658 | if (!JUMP_P (insn) || recog_memoized (insn) != CODE_FOR_loop_end) | |
4659 | return NULL_RTX; | |
4660 | ||
4661 | reg = SET_DEST (XVECEXP (PATTERN (insn), 0, 1)); | |
4662 | if (!REG_P (reg)) | |
4663 | return NULL_RTX; | |
4664 | ||
4665 | return reg; | |
4666 | } | |
4667 | ||
4668 | ||
4669 | static struct hw_doloop_hooks xtensa_doloop_hooks = | |
4670 | { | |
4671 | hwloop_pattern_reg, | |
4672 | hwloop_optimize, | |
4673 | hwloop_fail | |
4674 | }; | |
4675 | ||
4676 | /* Run from machine_dependent_reorg, this pass looks for doloop_end insns | |
4677 | and tries to rewrite the RTL of these loops so that proper Xtensa | |
4678 | hardware loops are generated. */ | |
4679 | ||
4680 | static void | |
4681 | xtensa_reorg_loops (void) | |
4682 | { | |
1a711a0b MF |
4683 | if (TARGET_LOOPS) |
4684 | reorg_loops (false, &xtensa_doloop_hooks); | |
c6836000 | 4685 | } |
6383386a FY |
4686 | |
4687 | /* Implement the TARGET_MACHINE_DEPENDENT_REORG pass. */ | |
4688 | ||
4689 | static void | |
4690 | xtensa_reorg (void) | |
4691 | { | |
4692 | /* We are freeing block_for_insn in the toplev to keep compatibility | |
4693 | with old MDEP_REORGS that are not CFG based. Recompute it now. */ | |
4694 | compute_bb_for_insn (); | |
4695 | ||
4696 | df_analyze (); | |
4697 | ||
4698 | /* Doloop optimization. */ | |
4699 | xtensa_reorg_loops (); | |
4700 | } | |
4701 | ||
590e2636 MF |
4702 | /* Update register usage after having seen the compiler flags. */ |
4703 | ||
4704 | static void | |
4705 | xtensa_conditional_register_usage (void) | |
4706 | { | |
4707 | unsigned i, c_mask; | |
4708 | ||
4709 | c_mask = TARGET_WINDOWED_ABI ? (1 << 1) : (1 << 2); | |
4710 | ||
4711 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
4712 | { | |
4713 | /* Set/reset conditionally defined registers from | |
4714 | CALL_USED_REGISTERS initializer. */ | |
4715 | if (call_used_regs[i] > 1) | |
4716 | call_used_regs[i] = !!(call_used_regs[i] & c_mask); | |
4717 | } | |
4718 | ||
4719 | /* Remove hard FP register from the preferred reload registers set. */ | |
4720 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)RL_REGS], | |
4721 | HARD_FRAME_POINTER_REGNUM); | |
4722 | } | |
4723 | ||
4724 | /* Map hard register number to register class */ | |
4725 | ||
4726 | enum reg_class xtensa_regno_to_class (int regno) | |
4727 | { | |
4728 | static const enum reg_class regno_to_class[FIRST_PSEUDO_REGISTER] = | |
4729 | { | |
4730 | RL_REGS, SP_REG, RL_REGS, RL_REGS, | |
4731 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4732 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4733 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4734 | AR_REGS, AR_REGS, BR_REGS, | |
4735 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4736 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4737 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4738 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4739 | ACC_REG, | |
4740 | }; | |
4741 | ||
4742 | if (regno == HARD_FRAME_POINTER_REGNUM) | |
4743 | return GR_REGS; | |
4744 | else | |
4745 | return regno_to_class[regno]; | |
4746 | } | |
4747 | ||
58e17cf8 RS |
4748 | /* Implement TARGET_CONSTANT_ALIGNMENT. Align string constants and |
4749 | constructors to at least a word boundary. The typical use of this | |
4750 | macro is to increase alignment for string constants to be word | |
4751 | aligned so that 'strcpy' calls that copy constants can be done | |
4752 | inline. */ | |
4753 | ||
4754 | static HOST_WIDE_INT | |
4755 | xtensa_constant_alignment (const_tree exp, HOST_WIDE_INT align) | |
4756 | { | |
4757 | if ((TREE_CODE (exp) == STRING_CST || TREE_CODE (exp) == CONSTRUCTOR) | |
4758 | && !optimize_size) | |
4759 | return MAX (align, BITS_PER_WORD); | |
4760 | return align; | |
4761 | } | |
4762 | ||
f50c32fa MF |
4763 | static bool |
4764 | xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) | |
4765 | { | |
4766 | gcc_assert (from == ARG_POINTER_REGNUM || from == FRAME_POINTER_REGNUM); | |
4767 | ||
4768 | /* If we need a frame pointer, ARG_POINTER_REGNUM and FRAME_POINTER_REGNUM | |
4769 | can only eliminate to HARD_FRAME_POINTER_REGNUM. */ | |
4770 | return to == HARD_FRAME_POINTER_REGNUM | |
4771 | || (!frame_pointer_needed && to == STACK_POINTER_REGNUM); | |
4772 | } | |
4773 | ||
2a31c321 RS |
4774 | /* Implement TARGET_STARTING_FRAME_OFFSET. */ |
4775 | ||
4776 | static HOST_WIDE_INT | |
4777 | xtensa_starting_frame_offset (void) | |
4778 | { | |
4779 | if (FRAME_GROWS_DOWNWARD) | |
4780 | return 0; | |
4781 | return crtl->outgoing_args_size; | |
4782 | } | |
4783 | ||
8c9ee176 MF |
4784 | /* Implement TARGET_ASAN_SHADOW_OFFSET. */ |
4785 | ||
4786 | static unsigned HOST_WIDE_INT | |
4787 | xtensa_asan_shadow_offset (void) | |
4788 | { | |
4789 | return HOST_WIDE_INT_UC (0x10000000); | |
4790 | } | |
4791 | ||
b7641550 MF |
4792 | static rtx |
4793 | xtensa_delegitimize_address (rtx op) | |
4794 | { | |
4795 | switch (GET_CODE (op)) | |
4796 | { | |
4797 | case CONST: | |
4798 | return xtensa_delegitimize_address (XEXP (op, 0)); | |
4799 | ||
4800 | case UNSPEC: | |
4801 | if (XINT (op, 1) == UNSPEC_PLT) | |
4802 | return XVECEXP(op, 0, 0); | |
4803 | break; | |
4804 | ||
4805 | default: | |
4806 | break; | |
4807 | } | |
4808 | return op; | |
4809 | } | |
4810 | ||
e2500fed | 4811 | #include "gt-xtensa.h" |