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03984308 | 1 | /* Subroutines for insn-output.c 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" |
85d53c1d | 58 | |
994c5d85 | 59 | /* This file should be included last. */ |
d58627a0 | 60 | #include "target-def.h" |
03984308 BW |
61 | |
62 | /* Enumeration for all of the relational tests, so that we can build | |
63 | arrays indexed by the test type, and not worry about the order | |
638db43e | 64 | of EQ, NE, etc. */ |
03984308 | 65 | |
ffbc8796 BW |
66 | enum internal_test |
67 | { | |
68 | ITEST_EQ, | |
69 | ITEST_NE, | |
70 | ITEST_GT, | |
71 | ITEST_GE, | |
72 | ITEST_LT, | |
73 | ITEST_LE, | |
74 | ITEST_GTU, | |
75 | ITEST_GEU, | |
76 | ITEST_LTU, | |
77 | ITEST_LEU, | |
78 | ITEST_MAX | |
79 | }; | |
03984308 | 80 | |
03984308 BW |
81 | /* Array giving truth value on whether or not a given hard register |
82 | can support a given mode. */ | |
f939c3e6 RS |
83 | static char xtensa_hard_regno_mode_ok_p |
84 | [(int) MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER]; | |
03984308 | 85 | |
a46bbb5a | 86 | /* Largest block move to handle in-line. */ |
03984308 BW |
87 | #define LARGEST_MOVE_RATIO 15 |
88 | ||
89 | /* Define the structure for the machine field in struct function. */ | |
d1b38208 | 90 | struct GTY(()) machine_function |
03984308 BW |
91 | { |
92 | int accesses_prev_frame; | |
997b8b4d BW |
93 | bool need_a7_copy; |
94 | bool vararg_a7; | |
0d8442b8 | 95 | rtx vararg_a7_copy; |
240a513f | 96 | rtx_insn *set_frame_ptr_insn; |
ad89d820 MF |
97 | /* Current frame size calculated by compute_frame_size. */ |
98 | unsigned current_frame_size; | |
99 | /* Callee-save area size in the current frame calculated by | |
100 | compute_frame_size. */ | |
101 | int callee_save_size; | |
102 | bool frame_laid_out; | |
103 | bool epilogue_done; | |
03984308 BW |
104 | }; |
105 | ||
106 | /* Vector, indexed by hard register number, which contains 1 for a | |
107 | register that is allowable in a candidate for leaf function | |
638db43e | 108 | treatment. */ |
03984308 BW |
109 | |
110 | const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER] = | |
111 | { | |
112 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
113 | 1, 1, 1, | |
114 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
115 | 1 | |
116 | }; | |
117 | ||
c5387660 | 118 | static void xtensa_option_override (void); |
ffbc8796 BW |
119 | static enum internal_test map_test_to_internal_test (enum rtx_code); |
120 | static rtx gen_int_relational (enum rtx_code, rtx, rtx, int *); | |
121 | static rtx gen_float_relational (enum rtx_code, rtx, rtx); | |
ef4bddc2 | 122 | static rtx gen_conditional_move (enum rtx_code, machine_mode, rtx, rtx); |
ffbc8796 | 123 | static rtx fixup_subreg_mem (rtx); |
ffbc8796 | 124 | static struct machine_function * xtensa_init_machine_status (void); |
6a7a462c | 125 | static rtx xtensa_legitimize_tls_address (rtx); |
ef4bddc2 | 126 | static rtx xtensa_legitimize_address (rtx, rtx, machine_mode); |
5bfed9a9 | 127 | static bool xtensa_mode_dependent_address_p (const_rtx, addr_space_t); |
586de218 | 128 | static bool xtensa_return_in_msb (const_tree); |
ffbc8796 | 129 | static void printx (FILE *, signed int); |
4c45af42 | 130 | static rtx xtensa_builtin_saveregs (void); |
ef4bddc2 | 131 | static bool xtensa_legitimate_address_p (machine_mode, rtx, bool); |
ffbc8796 BW |
132 | static unsigned int xtensa_multibss_section_type_flags (tree, const char *, |
133 | int) ATTRIBUTE_UNUSED; | |
ef4bddc2 | 134 | static section *xtensa_select_rtx_section (machine_mode, rtx, |
d6b5193b | 135 | unsigned HOST_WIDE_INT); |
e548c9df | 136 | static bool xtensa_rtx_costs (rtx, machine_mode, int, int, int *, bool); |
ef4bddc2 | 137 | static int xtensa_register_move_cost (machine_mode, reg_class_t, |
5378dda2 | 138 | reg_class_t); |
ef4bddc2 | 139 | static int xtensa_memory_move_cost (machine_mode, reg_class_t, bool); |
c35d187f | 140 | static tree xtensa_build_builtin_va_list (void); |
586de218 | 141 | static bool xtensa_return_in_memory (const_tree, const_tree); |
726a989a RB |
142 | static tree xtensa_gimplify_va_arg_expr (tree, tree, gimple_seq *, |
143 | gimple_seq *); | |
6930c98c RS |
144 | static void xtensa_function_arg_advance (cumulative_args_t, |
145 | const function_arg_info &); | |
6783fdb7 | 146 | static rtx xtensa_function_arg (cumulative_args_t, const function_arg_info &); |
d5cc9181 | 147 | static rtx xtensa_function_incoming_arg (cumulative_args_t, |
6783fdb7 | 148 | const function_arg_info &); |
e2b2d01e | 149 | static rtx xtensa_function_value (const_tree, const_tree, bool); |
ef4bddc2 | 150 | static rtx xtensa_libcall_value (machine_mode, const_rtx); |
dde8a3a4 | 151 | static bool xtensa_function_value_regno_p (const unsigned int); |
ef4bddc2 | 152 | static unsigned int xtensa_function_arg_boundary (machine_mode, |
c2ed6cf8 | 153 | const_tree); |
09fa8841 | 154 | static void xtensa_init_builtins (void); |
f311c3b4 | 155 | static tree xtensa_fold_builtin (tree, int, tree *, bool); |
ef4bddc2 | 156 | static rtx xtensa_expand_builtin (tree, rtx, rtx, machine_mode, int); |
9d0b1619 | 157 | static void xtensa_va_start (tree, rtx); |
b52b1749 | 158 | static bool xtensa_frame_pointer_required (void); |
2b4fa409 | 159 | static rtx xtensa_static_chain (const_tree, bool); |
3c1229cb RH |
160 | static void xtensa_asm_trampoline_template (FILE *); |
161 | static void xtensa_trampoline_init (rtx, tree, rtx); | |
2ac6bb04 | 162 | static bool xtensa_output_addr_const_extra (FILE *, rtx); |
ef4bddc2 | 163 | static bool xtensa_cannot_force_const_mem (machine_mode, rtx); |
b64a1b53 | 164 | |
a6e508f9 AS |
165 | static reg_class_t xtensa_preferred_reload_class (rtx, reg_class_t); |
166 | static reg_class_t xtensa_preferred_output_reload_class (rtx, reg_class_t); | |
167 | static reg_class_t xtensa_secondary_reload (bool, rtx, reg_class_t, | |
ef4bddc2 | 168 | machine_mode, |
a6e508f9 AS |
169 | struct secondary_reload_info *); |
170 | ||
a1a79768 | 171 | static bool constantpool_address_p (const_rtx addr); |
ef4bddc2 | 172 | static bool xtensa_legitimate_constant_p (machine_mode, rtx); |
6383386a FY |
173 | static void xtensa_reorg (void); |
174 | static bool xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
175 | unsigned int, bool); | |
176 | static const char *xtensa_invalid_within_doloop (const rtx_insn *); | |
a1a79768 | 177 | |
d9886a9e | 178 | static bool xtensa_member_type_forces_blk (const_tree, |
ef4bddc2 | 179 | machine_mode mode); |
d9886a9e | 180 | |
590e2636 | 181 | static void xtensa_conditional_register_usage (void); |
c43f4279 | 182 | static unsigned int xtensa_hard_regno_nregs (unsigned int, machine_mode); |
f939c3e6 | 183 | static bool xtensa_hard_regno_mode_ok (unsigned int, machine_mode); |
99e1629f | 184 | static bool xtensa_modes_tieable_p (machine_mode, machine_mode); |
58e17cf8 | 185 | static HOST_WIDE_INT xtensa_constant_alignment (const_tree, HOST_WIDE_INT); |
f50c32fa MF |
186 | static bool xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, |
187 | const int to); | |
2a31c321 | 188 | static HOST_WIDE_INT xtensa_starting_frame_offset (void); |
8c9ee176 | 189 | static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void); |
03984308 | 190 | |
b7641550 MF |
191 | static rtx xtensa_delegitimize_address (rtx); |
192 | ||
590e2636 | 193 | \f |
03984308 BW |
194 | |
195 | /* These hooks specify assembly directives for creating certain kinds | |
196 | of integer object. */ | |
197 | ||
198 | #undef TARGET_ASM_ALIGNED_SI_OP | |
199 | #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t" | |
200 | ||
b64a1b53 RH |
201 | #undef TARGET_ASM_SELECT_RTX_SECTION |
202 | #define TARGET_ASM_SELECT_RTX_SECTION xtensa_select_rtx_section | |
03984308 | 203 | |
506d7b68 PB |
204 | #undef TARGET_LEGITIMIZE_ADDRESS |
205 | #define TARGET_LEGITIMIZE_ADDRESS xtensa_legitimize_address | |
a1a79768 AS |
206 | #undef TARGET_MODE_DEPENDENT_ADDRESS_P |
207 | #define TARGET_MODE_DEPENDENT_ADDRESS_P xtensa_mode_dependent_address_p | |
506d7b68 | 208 | |
5378dda2 AS |
209 | #undef TARGET_REGISTER_MOVE_COST |
210 | #define TARGET_REGISTER_MOVE_COST xtensa_register_move_cost | |
211 | #undef TARGET_MEMORY_MOVE_COST | |
212 | #define TARGET_MEMORY_MOVE_COST xtensa_memory_move_cost | |
3c50106f RH |
213 | #undef TARGET_RTX_COSTS |
214 | #define TARGET_RTX_COSTS xtensa_rtx_costs | |
dcefdf67 | 215 | #undef TARGET_ADDRESS_COST |
b413068c | 216 | #define TARGET_ADDRESS_COST hook_int_rtx_mode_as_bool_0 |
3c50106f | 217 | |
d9886a9e L |
218 | #undef TARGET_MEMBER_TYPE_FORCES_BLK |
219 | #define TARGET_MEMBER_TYPE_FORCES_BLK xtensa_member_type_forces_blk | |
220 | ||
c35d187f RH |
221 | #undef TARGET_BUILD_BUILTIN_VA_LIST |
222 | #define TARGET_BUILD_BUILTIN_VA_LIST xtensa_build_builtin_va_list | |
223 | ||
d7bd8aeb JJ |
224 | #undef TARGET_EXPAND_BUILTIN_VA_START |
225 | #define TARGET_EXPAND_BUILTIN_VA_START xtensa_va_start | |
226 | ||
cde0f3fd PB |
227 | #undef TARGET_PROMOTE_FUNCTION_MODE |
228 | #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote | |
4c45af42 | 229 | #undef TARGET_PROMOTE_PROTOTYPES |
586de218 | 230 | #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true |
4c45af42 | 231 | |
4c45af42 KH |
232 | #undef TARGET_RETURN_IN_MEMORY |
233 | #define TARGET_RETURN_IN_MEMORY xtensa_return_in_memory | |
e2b2d01e AS |
234 | #undef TARGET_FUNCTION_VALUE |
235 | #define TARGET_FUNCTION_VALUE xtensa_function_value | |
dde8a3a4 AS |
236 | #undef TARGET_LIBCALL_VALUE |
237 | #define TARGET_LIBCALL_VALUE xtensa_libcall_value | |
238 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
239 | #define TARGET_FUNCTION_VALUE_REGNO_P xtensa_function_value_regno_p | |
240 | ||
42ba5130 | 241 | #undef TARGET_SPLIT_COMPLEX_ARG |
3101faab | 242 | #define TARGET_SPLIT_COMPLEX_ARG hook_bool_const_tree_true |
fe984136 RH |
243 | #undef TARGET_MUST_PASS_IN_STACK |
244 | #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size | |
626a4b31 NF |
245 | #undef TARGET_FUNCTION_ARG_ADVANCE |
246 | #define TARGET_FUNCTION_ARG_ADVANCE xtensa_function_arg_advance | |
247 | #undef TARGET_FUNCTION_ARG | |
248 | #define TARGET_FUNCTION_ARG xtensa_function_arg | |
249 | #undef TARGET_FUNCTION_INCOMING_ARG | |
250 | #define TARGET_FUNCTION_INCOMING_ARG xtensa_function_incoming_arg | |
c2ed6cf8 NF |
251 | #undef TARGET_FUNCTION_ARG_BOUNDARY |
252 | #define TARGET_FUNCTION_ARG_BOUNDARY xtensa_function_arg_boundary | |
4c45af42 KH |
253 | |
254 | #undef TARGET_EXPAND_BUILTIN_SAVEREGS | |
255 | #define TARGET_EXPAND_BUILTIN_SAVEREGS xtensa_builtin_saveregs | |
85d53c1d RH |
256 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
257 | #define TARGET_GIMPLIFY_VA_ARG_EXPR xtensa_gimplify_va_arg_expr | |
4c45af42 | 258 | |
6e5ff6e7 BW |
259 | #undef TARGET_RETURN_IN_MSB |
260 | #define TARGET_RETURN_IN_MSB xtensa_return_in_msb | |
261 | ||
09fa8841 BW |
262 | #undef TARGET_INIT_BUILTINS |
263 | #define TARGET_INIT_BUILTINS xtensa_init_builtins | |
264 | #undef TARGET_FOLD_BUILTIN | |
265 | #define TARGET_FOLD_BUILTIN xtensa_fold_builtin | |
266 | #undef TARGET_EXPAND_BUILTIN | |
267 | #define TARGET_EXPAND_BUILTIN xtensa_expand_builtin | |
268 | ||
a6e508f9 AS |
269 | #undef TARGET_PREFERRED_RELOAD_CLASS |
270 | #define TARGET_PREFERRED_RELOAD_CLASS xtensa_preferred_reload_class | |
271 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
272 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS xtensa_preferred_output_reload_class | |
273 | ||
37fbe8a3 BW |
274 | #undef TARGET_SECONDARY_RELOAD |
275 | #define TARGET_SECONDARY_RELOAD xtensa_secondary_reload | |
276 | ||
6a7a462c | 277 | #undef TARGET_HAVE_TLS |
e46dad5d | 278 | #define TARGET_HAVE_TLS HAVE_AS_TLS |
6a7a462c BW |
279 | |
280 | #undef TARGET_CANNOT_FORCE_CONST_MEM | |
fbbf66e7 | 281 | #define TARGET_CANNOT_FORCE_CONST_MEM xtensa_cannot_force_const_mem |
6a7a462c | 282 | |
d81db636 SB |
283 | #undef TARGET_LRA_P |
284 | #define TARGET_LRA_P hook_bool_void_false | |
285 | ||
c6c3dba9 PB |
286 | #undef TARGET_LEGITIMATE_ADDRESS_P |
287 | #define TARGET_LEGITIMATE_ADDRESS_P xtensa_legitimate_address_p | |
288 | ||
b52b1749 AS |
289 | #undef TARGET_FRAME_POINTER_REQUIRED |
290 | #define TARGET_FRAME_POINTER_REQUIRED xtensa_frame_pointer_required | |
291 | ||
2b4fa409 RH |
292 | #undef TARGET_STATIC_CHAIN |
293 | #define TARGET_STATIC_CHAIN xtensa_static_chain | |
3c1229cb RH |
294 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
295 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE xtensa_asm_trampoline_template | |
296 | #undef TARGET_TRAMPOLINE_INIT | |
297 | #define TARGET_TRAMPOLINE_INIT xtensa_trampoline_init | |
298 | ||
c5387660 JM |
299 | #undef TARGET_OPTION_OVERRIDE |
300 | #define TARGET_OPTION_OVERRIDE xtensa_option_override | |
301 | ||
2ac6bb04 AS |
302 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
303 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA xtensa_output_addr_const_extra | |
304 | ||
1a627b35 RS |
305 | #undef TARGET_LEGITIMATE_CONSTANT_P |
306 | #define TARGET_LEGITIMATE_CONSTANT_P xtensa_legitimate_constant_p | |
307 | ||
6383386a FY |
308 | #undef TARGET_MACHINE_DEPENDENT_REORG |
309 | #define TARGET_MACHINE_DEPENDENT_REORG xtensa_reorg | |
310 | ||
311 | #undef TARGET_CAN_USE_DOLOOP_P | |
312 | #define TARGET_CAN_USE_DOLOOP_P xtensa_can_use_doloop_p | |
313 | ||
314 | #undef TARGET_INVALID_WITHIN_DOLOOP | |
315 | #define TARGET_INVALID_WITHIN_DOLOOP xtensa_invalid_within_doloop | |
316 | ||
590e2636 MF |
317 | #undef TARGET_CONDITIONAL_REGISTER_USAGE |
318 | #define TARGET_CONDITIONAL_REGISTER_USAGE xtensa_conditional_register_usage | |
319 | ||
c43f4279 RS |
320 | #undef TARGET_HARD_REGNO_NREGS |
321 | #define TARGET_HARD_REGNO_NREGS xtensa_hard_regno_nregs | |
f939c3e6 RS |
322 | #undef TARGET_HARD_REGNO_MODE_OK |
323 | #define TARGET_HARD_REGNO_MODE_OK xtensa_hard_regno_mode_ok | |
324 | ||
99e1629f RS |
325 | #undef TARGET_MODES_TIEABLE_P |
326 | #define TARGET_MODES_TIEABLE_P xtensa_modes_tieable_p | |
327 | ||
58e17cf8 RS |
328 | #undef TARGET_CONSTANT_ALIGNMENT |
329 | #define TARGET_CONSTANT_ALIGNMENT xtensa_constant_alignment | |
330 | ||
f50c32fa MF |
331 | #undef TARGET_CAN_ELIMINATE |
332 | #define TARGET_CAN_ELIMINATE xtensa_can_eliminate | |
333 | ||
2a31c321 RS |
334 | #undef TARGET_STARTING_FRAME_OFFSET |
335 | #define TARGET_STARTING_FRAME_OFFSET xtensa_starting_frame_offset | |
336 | ||
8c9ee176 MF |
337 | #undef TARGET_ASAN_SHADOW_OFFSET |
338 | #define TARGET_ASAN_SHADOW_OFFSET xtensa_asan_shadow_offset | |
339 | ||
c6579387 MF |
340 | #undef TARGET_HAVE_SPECULATION_SAFE_VALUE |
341 | #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed | |
342 | ||
b7641550 MF |
343 | #undef TARGET_DELEGITIMIZE_ADDRESS |
344 | #define TARGET_DELEGITIMIZE_ADDRESS xtensa_delegitimize_address | |
345 | ||
b64a1b53 | 346 | struct gcc_target targetm = TARGET_INITIALIZER; |
03984308 | 347 | |
887af464 BW |
348 | \f |
349 | /* Functions to test Xtensa immediate operand validity. */ | |
03984308 | 350 | |
8eb1bc5c BW |
351 | bool |
352 | xtensa_simm8 (HOST_WIDE_INT v) | |
353 | { | |
354 | return v >= -128 && v <= 127; | |
355 | } | |
356 | ||
357 | ||
358 | bool | |
359 | xtensa_simm8x256 (HOST_WIDE_INT v) | |
360 | { | |
361 | return (v & 255) == 0 && (v >= -32768 && v <= 32512); | |
362 | } | |
363 | ||
364 | ||
365 | bool | |
366 | xtensa_simm12b (HOST_WIDE_INT v) | |
367 | { | |
368 | return v >= -2048 && v <= 2047; | |
369 | } | |
370 | ||
371 | ||
372 | static bool | |
373 | xtensa_uimm8 (HOST_WIDE_INT v) | |
374 | { | |
375 | return v >= 0 && v <= 255; | |
376 | } | |
377 | ||
378 | ||
379 | static bool | |
380 | xtensa_uimm8x2 (HOST_WIDE_INT v) | |
381 | { | |
382 | return (v & 1) == 0 && (v >= 0 && v <= 510); | |
383 | } | |
384 | ||
385 | ||
386 | static bool | |
387 | xtensa_uimm8x4 (HOST_WIDE_INT v) | |
388 | { | |
389 | return (v & 3) == 0 && (v >= 0 && v <= 1020); | |
390 | } | |
391 | ||
392 | ||
393 | static bool | |
394 | xtensa_b4const (HOST_WIDE_INT v) | |
03984308 BW |
395 | { |
396 | switch (v) | |
397 | { | |
8eb1bc5c BW |
398 | case -1: |
399 | case 1: | |
03984308 BW |
400 | case 2: |
401 | case 3: | |
402 | case 4: | |
403 | case 5: | |
404 | case 6: | |
405 | case 7: | |
406 | case 8: | |
407 | case 10: | |
408 | case 12: | |
409 | case 16: | |
410 | case 32: | |
411 | case 64: | |
412 | case 128: | |
413 | case 256: | |
8eb1bc5c | 414 | return true; |
03984308 | 415 | } |
8eb1bc5c | 416 | return false; |
03984308 BW |
417 | } |
418 | ||
03984308 | 419 | |
8eb1bc5c BW |
420 | bool |
421 | xtensa_b4const_or_zero (HOST_WIDE_INT v) | |
03984308 | 422 | { |
8eb1bc5c BW |
423 | if (v == 0) |
424 | return true; | |
425 | return xtensa_b4const (v); | |
03984308 BW |
426 | } |
427 | ||
03984308 | 428 | |
8eb1bc5c BW |
429 | bool |
430 | xtensa_b4constu (HOST_WIDE_INT v) | |
03984308 BW |
431 | { |
432 | switch (v) | |
433 | { | |
8eb1bc5c BW |
434 | case 32768: |
435 | case 65536: | |
03984308 BW |
436 | case 2: |
437 | case 3: | |
438 | case 4: | |
439 | case 5: | |
440 | case 6: | |
441 | case 7: | |
442 | case 8: | |
443 | case 10: | |
444 | case 12: | |
445 | case 16: | |
446 | case 32: | |
447 | case 64: | |
448 | case 128: | |
449 | case 256: | |
8eb1bc5c | 450 | return true; |
03984308 | 451 | } |
8eb1bc5c | 452 | return false; |
03984308 BW |
453 | } |
454 | ||
03984308 | 455 | |
8eb1bc5c BW |
456 | bool |
457 | xtensa_mask_immediate (HOST_WIDE_INT v) | |
03984308 | 458 | { |
8eb1bc5c BW |
459 | #define MAX_MASK_SIZE 16 |
460 | int mask_size; | |
03984308 | 461 | |
8eb1bc5c BW |
462 | for (mask_size = 1; mask_size <= MAX_MASK_SIZE; mask_size++) |
463 | { | |
464 | if ((v & 1) == 0) | |
465 | return false; | |
466 | v = v >> 1; | |
467 | if (v == 0) | |
468 | return true; | |
469 | } | |
03984308 | 470 | |
8eb1bc5c | 471 | return false; |
03984308 BW |
472 | } |
473 | ||
03984308 | 474 | |
03984308 | 475 | /* This is just like the standard true_regnum() function except that it |
638db43e | 476 | works even when reg_renumber is not initialized. */ |
03984308 BW |
477 | |
478 | int | |
ffbc8796 | 479 | xt_true_regnum (rtx x) |
03984308 BW |
480 | { |
481 | if (GET_CODE (x) == REG) | |
482 | { | |
483 | if (reg_renumber | |
484 | && REGNO (x) >= FIRST_PSEUDO_REGISTER | |
485 | && reg_renumber[REGNO (x)] >= 0) | |
486 | return reg_renumber[REGNO (x)]; | |
487 | return REGNO (x); | |
488 | } | |
489 | if (GET_CODE (x) == SUBREG) | |
490 | { | |
491 | int base = xt_true_regnum (SUBREG_REG (x)); | |
492 | if (base >= 0 && base < FIRST_PSEUDO_REGISTER) | |
493 | return base + subreg_regno_offset (REGNO (SUBREG_REG (x)), | |
494 | GET_MODE (SUBREG_REG (x)), | |
495 | SUBREG_BYTE (x), GET_MODE (x)); | |
496 | } | |
497 | return -1; | |
498 | } | |
499 | ||
500 | ||
03984308 | 501 | int |
ef4bddc2 | 502 | xtensa_valid_move (machine_mode mode, rtx *operands) |
03984308 | 503 | { |
a8cacfd2 BW |
504 | /* Either the destination or source must be a register, and the |
505 | MAC16 accumulator doesn't count. */ | |
506 | ||
507 | if (register_operand (operands[0], mode)) | |
508 | { | |
509 | int dst_regnum = xt_true_regnum (operands[0]); | |
510 | ||
a024f514 MF |
511 | if (xtensa_tls_referenced_p (operands[1])) |
512 | return FALSE; | |
513 | ||
638db43e | 514 | /* The stack pointer can only be assigned with a MOVSP opcode. */ |
a8cacfd2 | 515 | if (dst_regnum == STACK_POINTER_REGNUM) |
590e2636 MF |
516 | return !TARGET_WINDOWED_ABI |
517 | || (mode == SImode | |
518 | && register_operand (operands[1], mode) | |
519 | && !ACC_REG_P (xt_true_regnum (operands[1]))); | |
a8cacfd2 BW |
520 | |
521 | if (!ACC_REG_P (dst_regnum)) | |
522 | return true; | |
523 | } | |
3437320b | 524 | if (register_operand (operands[1], mode)) |
a8cacfd2 BW |
525 | { |
526 | int src_regnum = xt_true_regnum (operands[1]); | |
527 | if (!ACC_REG_P (src_regnum)) | |
528 | return true; | |
529 | } | |
03984308 BW |
530 | return FALSE; |
531 | } | |
532 | ||
533 | ||
03984308 | 534 | int |
ffbc8796 | 535 | smalloffset_mem_p (rtx op) |
03984308 BW |
536 | { |
537 | if (GET_CODE (op) == MEM) | |
538 | { | |
539 | rtx addr = XEXP (op, 0); | |
540 | if (GET_CODE (addr) == REG) | |
da1f39e4 | 541 | return BASE_REG_P (addr, 0); |
03984308 BW |
542 | if (GET_CODE (addr) == PLUS) |
543 | { | |
544 | rtx offset = XEXP (addr, 0); | |
8eb1bc5c | 545 | HOST_WIDE_INT val; |
03984308 BW |
546 | if (GET_CODE (offset) != CONST_INT) |
547 | offset = XEXP (addr, 1); | |
548 | if (GET_CODE (offset) != CONST_INT) | |
549 | return FALSE; | |
8eb1bc5c BW |
550 | |
551 | val = INTVAL (offset); | |
552 | return (val & 3) == 0 && (val >= 0 && val <= 60); | |
03984308 BW |
553 | } |
554 | } | |
555 | return FALSE; | |
556 | } | |
557 | ||
558 | ||
a1a79768 AS |
559 | static bool |
560 | constantpool_address_p (const_rtx addr) | |
03984308 | 561 | { |
a1a79768 | 562 | const_rtx sym = addr; |
03984308 BW |
563 | |
564 | if (GET_CODE (addr) == CONST) | |
565 | { | |
566 | rtx offset; | |
567 | ||
3bbc2af6 | 568 | /* Only handle (PLUS (SYM, OFFSET)) form. */ |
03984308 BW |
569 | addr = XEXP (addr, 0); |
570 | if (GET_CODE (addr) != PLUS) | |
a1a79768 | 571 | return false; |
03984308 | 572 | |
3bbc2af6 | 573 | /* Make sure the address is word aligned. */ |
03984308 | 574 | offset = XEXP (addr, 1); |
a1a79768 | 575 | if ((!CONST_INT_P (offset)) |
03984308 | 576 | || ((INTVAL (offset) & 3) != 0)) |
a1a79768 | 577 | return false; |
03984308 BW |
578 | |
579 | sym = XEXP (addr, 0); | |
580 | } | |
581 | ||
582 | if ((GET_CODE (sym) == SYMBOL_REF) | |
583 | && CONSTANT_POOL_ADDRESS_P (sym)) | |
a1a79768 AS |
584 | return true; |
585 | return false; | |
03984308 BW |
586 | } |
587 | ||
588 | ||
589 | int | |
ffbc8796 | 590 | constantpool_mem_p (rtx op) |
03984308 | 591 | { |
63694bdd BW |
592 | if (GET_CODE (op) == SUBREG) |
593 | op = SUBREG_REG (op); | |
03984308 BW |
594 | if (GET_CODE (op) == MEM) |
595 | return constantpool_address_p (XEXP (op, 0)); | |
596 | return FALSE; | |
597 | } | |
598 | ||
599 | ||
6a7a462c BW |
600 | /* Return TRUE if X is a thread-local symbol. */ |
601 | ||
602 | static bool | |
603 | xtensa_tls_symbol_p (rtx x) | |
604 | { | |
e46dad5d | 605 | if (! targetm.have_tls) |
6a7a462c BW |
606 | return false; |
607 | ||
608 | return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0; | |
609 | } | |
610 | ||
611 | ||
03984308 | 612 | void |
ffbc8796 | 613 | xtensa_extend_reg (rtx dst, rtx src) |
03984308 BW |
614 | { |
615 | rtx temp = gen_reg_rtx (SImode); | |
616 | rtx shift = GEN_INT (BITS_PER_WORD - GET_MODE_BITSIZE (GET_MODE (src))); | |
617 | ||
3bbc2af6 | 618 | /* Generate paradoxical subregs as needed so that the modes match. */ |
03984308 BW |
619 | src = simplify_gen_subreg (SImode, src, GET_MODE (src), 0); |
620 | dst = simplify_gen_subreg (SImode, dst, GET_MODE (dst), 0); | |
621 | ||
622 | emit_insn (gen_ashlsi3 (temp, src, shift)); | |
623 | emit_insn (gen_ashrsi3 (dst, temp, shift)); | |
624 | } | |
625 | ||
626 | ||
8eb1bc5c | 627 | bool |
ef4bddc2 | 628 | xtensa_mem_offset (unsigned v, machine_mode mode) |
03984308 BW |
629 | { |
630 | switch (mode) | |
631 | { | |
4e10a5a7 | 632 | case E_BLKmode: |
03984308 BW |
633 | /* Handle the worst case for block moves. See xtensa_expand_block_move |
634 | where we emit an optimized block move operation if the block can be | |
635 | moved in < "move_ratio" pieces. The worst case is when the block is | |
636 | aligned but has a size of (3 mod 4) (does this happen?) so that the | |
638db43e | 637 | last piece requires a byte load/store. */ |
f42f5a1b BW |
638 | return (xtensa_uimm8 (v) |
639 | && xtensa_uimm8 (v + MOVE_MAX * LARGEST_MOVE_RATIO)); | |
03984308 | 640 | |
4e10a5a7 | 641 | case E_QImode: |
03984308 BW |
642 | return xtensa_uimm8 (v); |
643 | ||
4e10a5a7 | 644 | case E_HImode: |
03984308 BW |
645 | return xtensa_uimm8x2 (v); |
646 | ||
738ae6ee | 647 | case E_DImode: |
4e10a5a7 | 648 | case E_DFmode: |
03984308 BW |
649 | return (xtensa_uimm8x4 (v) && xtensa_uimm8x4 (v + 4)); |
650 | ||
651 | default: | |
652 | break; | |
653 | } | |
654 | ||
655 | return xtensa_uimm8x4 (v); | |
656 | } | |
657 | ||
658 | ||
ffbc8796 | 659 | /* Make normal rtx_code into something we can index from an array. */ |
03984308 BW |
660 | |
661 | static enum internal_test | |
ffbc8796 | 662 | map_test_to_internal_test (enum rtx_code test_code) |
03984308 BW |
663 | { |
664 | enum internal_test test = ITEST_MAX; | |
665 | ||
666 | switch (test_code) | |
667 | { | |
668 | default: break; | |
669 | case EQ: test = ITEST_EQ; break; | |
670 | case NE: test = ITEST_NE; break; | |
671 | case GT: test = ITEST_GT; break; | |
672 | case GE: test = ITEST_GE; break; | |
673 | case LT: test = ITEST_LT; break; | |
674 | case LE: test = ITEST_LE; break; | |
675 | case GTU: test = ITEST_GTU; break; | |
676 | case GEU: test = ITEST_GEU; break; | |
677 | case LTU: test = ITEST_LTU; break; | |
678 | case LEU: test = ITEST_LEU; break; | |
679 | } | |
680 | ||
681 | return test; | |
682 | } | |
683 | ||
684 | ||
685 | /* Generate the code to compare two integer values. The return value is | |
638db43e | 686 | the comparison expression. */ |
03984308 BW |
687 | |
688 | static rtx | |
ffbc8796 BW |
689 | gen_int_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
690 | rtx cmp0, /* first operand to compare */ | |
691 | rtx cmp1, /* second operand to compare */ | |
692 | int *p_invert /* whether branch needs to reverse test */) | |
03984308 | 693 | { |
ffbc8796 BW |
694 | struct cmp_info |
695 | { | |
03984308 | 696 | enum rtx_code test_code; /* test code to use in insn */ |
8eb1bc5c | 697 | bool (*const_range_p) (HOST_WIDE_INT); /* range check function */ |
03984308 BW |
698 | int const_add; /* constant to add (convert LE -> LT) */ |
699 | int reverse_regs; /* reverse registers in test */ | |
700 | int invert_const; /* != 0 if invert value if cmp1 is constant */ | |
701 | int invert_reg; /* != 0 if invert value if cmp1 is register */ | |
702 | int unsignedp; /* != 0 for unsigned comparisons. */ | |
703 | }; | |
704 | ||
705 | static struct cmp_info info[ (int)ITEST_MAX ] = { | |
706 | ||
8eb1bc5c BW |
707 | { EQ, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* EQ */ |
708 | { NE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* NE */ | |
03984308 | 709 | |
8eb1bc5c BW |
710 | { LT, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* GT */ |
711 | { GE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* GE */ | |
712 | { LT, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* LT */ | |
713 | { GE, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* LE */ | |
03984308 BW |
714 | |
715 | { LTU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* GTU */ | |
716 | { GEU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* GEU */ | |
717 | { LTU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* LTU */ | |
718 | { GEU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* LEU */ | |
719 | }; | |
720 | ||
721 | enum internal_test test; | |
ef4bddc2 | 722 | machine_mode mode; |
03984308 BW |
723 | struct cmp_info *p_info; |
724 | ||
725 | test = map_test_to_internal_test (test_code); | |
177b6be0 | 726 | gcc_assert (test != ITEST_MAX); |
03984308 BW |
727 | |
728 | p_info = &info[ (int)test ]; | |
729 | ||
730 | mode = GET_MODE (cmp0); | |
731 | if (mode == VOIDmode) | |
732 | mode = GET_MODE (cmp1); | |
733 | ||
734 | /* Make sure we can handle any constants given to us. */ | |
735 | if (GET_CODE (cmp1) == CONST_INT) | |
736 | { | |
737 | HOST_WIDE_INT value = INTVAL (cmp1); | |
738 | unsigned HOST_WIDE_INT uvalue = (unsigned HOST_WIDE_INT)value; | |
739 | ||
740 | /* if the immediate overflows or does not fit in the immediate field, | |
741 | spill it to a register */ | |
742 | ||
743 | if ((p_info->unsignedp ? | |
744 | (uvalue + p_info->const_add > uvalue) : | |
745 | (value + p_info->const_add > value)) != (p_info->const_add > 0)) | |
746 | { | |
747 | cmp1 = force_reg (mode, cmp1); | |
748 | } | |
749 | else if (!(p_info->const_range_p) (value + p_info->const_add)) | |
750 | { | |
751 | cmp1 = force_reg (mode, cmp1); | |
752 | } | |
753 | } | |
754 | else if ((GET_CODE (cmp1) != REG) && (GET_CODE (cmp1) != SUBREG)) | |
755 | { | |
756 | cmp1 = force_reg (mode, cmp1); | |
757 | } | |
758 | ||
759 | /* See if we need to invert the result. */ | |
760 | *p_invert = ((GET_CODE (cmp1) == CONST_INT) | |
761 | ? p_info->invert_const | |
762 | : p_info->invert_reg); | |
763 | ||
764 | /* Comparison to constants, may involve adding 1 to change a LT into LE. | |
765 | Comparison between two registers, may involve switching operands. */ | |
766 | if (GET_CODE (cmp1) == CONST_INT) | |
767 | { | |
768 | if (p_info->const_add != 0) | |
769 | cmp1 = GEN_INT (INTVAL (cmp1) + p_info->const_add); | |
770 | ||
771 | } | |
772 | else if (p_info->reverse_regs) | |
773 | { | |
774 | rtx temp = cmp0; | |
775 | cmp0 = cmp1; | |
776 | cmp1 = temp; | |
777 | } | |
778 | ||
1c563bed | 779 | return gen_rtx_fmt_ee (p_info->test_code, VOIDmode, cmp0, cmp1); |
03984308 BW |
780 | } |
781 | ||
782 | ||
783 | /* Generate the code to compare two float values. The return value is | |
638db43e | 784 | the comparison expression. */ |
03984308 BW |
785 | |
786 | static rtx | |
ffbc8796 BW |
787 | gen_float_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
788 | rtx cmp0, /* first operand to compare */ | |
789 | rtx cmp1 /* second operand to compare */) | |
03984308 | 790 | { |
ffbc8796 | 791 | rtx (*gen_fn) (rtx, rtx, rtx); |
03984308 BW |
792 | rtx brtmp; |
793 | int reverse_regs, invert; | |
794 | ||
795 | switch (test_code) | |
796 | { | |
797 | case EQ: reverse_regs = 0; invert = 0; gen_fn = gen_seq_sf; break; | |
798 | case NE: reverse_regs = 0; invert = 1; gen_fn = gen_seq_sf; break; | |
799 | case LE: reverse_regs = 0; invert = 0; gen_fn = gen_sle_sf; break; | |
800 | case GT: reverse_regs = 1; invert = 0; gen_fn = gen_slt_sf; break; | |
801 | case LT: reverse_regs = 0; invert = 0; gen_fn = gen_slt_sf; break; | |
802 | case GE: reverse_regs = 1; invert = 0; gen_fn = gen_sle_sf; break; | |
ff779f98 BW |
803 | case UNEQ: reverse_regs = 0; invert = 0; gen_fn = gen_suneq_sf; break; |
804 | case LTGT: reverse_regs = 0; invert = 1; gen_fn = gen_suneq_sf; break; | |
805 | case UNLE: reverse_regs = 0; invert = 0; gen_fn = gen_sunle_sf; break; | |
806 | case UNGT: reverse_regs = 1; invert = 0; gen_fn = gen_sunlt_sf; break; | |
807 | case UNLT: reverse_regs = 0; invert = 0; gen_fn = gen_sunlt_sf; break; | |
808 | case UNGE: reverse_regs = 1; invert = 0; gen_fn = gen_sunle_sf; break; | |
809 | case UNORDERED: | |
810 | reverse_regs = 0; invert = 0; gen_fn = gen_sunordered_sf; break; | |
811 | case ORDERED: | |
812 | reverse_regs = 0; invert = 1; gen_fn = gen_sunordered_sf; break; | |
633e4eb4 | 813 | default: |
1c563bed | 814 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 BW |
815 | reverse_regs = 0; invert = 0; gen_fn = 0; /* avoid compiler warnings */ |
816 | } | |
817 | ||
818 | if (reverse_regs) | |
819 | { | |
820 | rtx temp = cmp0; | |
821 | cmp0 = cmp1; | |
822 | cmp1 = temp; | |
823 | } | |
824 | ||
825 | brtmp = gen_rtx_REG (CCmode, FPCC_REGNUM); | |
826 | emit_insn (gen_fn (brtmp, cmp0, cmp1)); | |
827 | ||
1c563bed | 828 | return gen_rtx_fmt_ee (invert ? EQ : NE, VOIDmode, brtmp, const0_rtx); |
03984308 BW |
829 | } |
830 | ||
831 | ||
832 | void | |
ef4bddc2 | 833 | xtensa_expand_conditional_branch (rtx *operands, machine_mode mode) |
03984308 | 834 | { |
f90b7a5a PB |
835 | enum rtx_code test_code = GET_CODE (operands[0]); |
836 | rtx cmp0 = operands[1]; | |
837 | rtx cmp1 = operands[2]; | |
03984308 BW |
838 | rtx cmp; |
839 | int invert; | |
840 | rtx label1, label2; | |
841 | ||
f90b7a5a | 842 | switch (mode) |
03984308 | 843 | { |
4e10a5a7 | 844 | case E_DFmode: |
03984308 | 845 | default: |
1c563bed | 846 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 | 847 | |
4e10a5a7 | 848 | case E_SImode: |
03984308 BW |
849 | invert = FALSE; |
850 | cmp = gen_int_relational (test_code, cmp0, cmp1, &invert); | |
851 | break; | |
852 | ||
4e10a5a7 | 853 | case E_SFmode: |
03984308 | 854 | if (!TARGET_HARD_FLOAT) |
da1f39e4 BW |
855 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, |
856 | cmp0, cmp1)); | |
03984308 BW |
857 | invert = FALSE; |
858 | cmp = gen_float_relational (test_code, cmp0, cmp1); | |
859 | break; | |
860 | } | |
861 | ||
862 | /* Generate the branch. */ | |
863 | ||
f90b7a5a | 864 | label1 = gen_rtx_LABEL_REF (VOIDmode, operands[3]); |
03984308 BW |
865 | label2 = pc_rtx; |
866 | ||
867 | if (invert) | |
868 | { | |
869 | label2 = label1; | |
870 | label1 = pc_rtx; | |
871 | } | |
872 | ||
f7df4a84 | 873 | emit_jump_insn (gen_rtx_SET (pc_rtx, |
03984308 BW |
874 | gen_rtx_IF_THEN_ELSE (VOIDmode, cmp, |
875 | label1, | |
876 | label2))); | |
877 | } | |
878 | ||
879 | ||
880 | static rtx | |
ef4bddc2 | 881 | gen_conditional_move (enum rtx_code code, machine_mode mode, |
f90b7a5a | 882 | rtx op0, rtx op1) |
03984308 | 883 | { |
f90b7a5a | 884 | if (mode == SImode) |
03984308 | 885 | { |
f90b7a5a PB |
886 | rtx cmp; |
887 | ||
03984308 BW |
888 | /* Jump optimization calls get_condition() which canonicalizes |
889 | comparisons like (GE x <const>) to (GT x <const-1>). | |
890 | Transform those comparisons back to GE, since that is the | |
891 | comparison supported in Xtensa. We shouldn't have to | |
892 | transform <LE x const> comparisons, because neither | |
893 | xtensa_expand_conditional_branch() nor get_condition() will | |
638db43e | 894 | produce them. */ |
03984308 BW |
895 | |
896 | if ((code == GT) && (op1 == constm1_rtx)) | |
897 | { | |
898 | code = GE; | |
899 | op1 = const0_rtx; | |
900 | } | |
bd1cd0d0 | 901 | cmp = gen_rtx_fmt_ee (code, VOIDmode, pc_rtx, const0_rtx); |
03984308 BW |
902 | |
903 | if (boolean_operator (cmp, VOIDmode)) | |
904 | { | |
3bbc2af6 | 905 | /* Swap the operands to make const0 second. */ |
03984308 BW |
906 | if (op0 == const0_rtx) |
907 | { | |
908 | op0 = op1; | |
909 | op1 = const0_rtx; | |
910 | } | |
911 | ||
3bbc2af6 | 912 | /* If not comparing against zero, emit a comparison (subtract). */ |
03984308 BW |
913 | if (op1 != const0_rtx) |
914 | { | |
915 | op0 = expand_binop (SImode, sub_optab, op0, op1, | |
916 | 0, 0, OPTAB_LIB_WIDEN); | |
917 | op1 = const0_rtx; | |
918 | } | |
919 | } | |
920 | else if (branch_operator (cmp, VOIDmode)) | |
921 | { | |
3bbc2af6 | 922 | /* Swap the operands to make const0 second. */ |
03984308 BW |
923 | if (op0 == const0_rtx) |
924 | { | |
925 | op0 = op1; | |
926 | op1 = const0_rtx; | |
927 | ||
928 | switch (code) | |
929 | { | |
930 | case LT: code = GE; break; | |
931 | case GE: code = LT; break; | |
177b6be0 | 932 | default: gcc_unreachable (); |
03984308 BW |
933 | } |
934 | } | |
935 | ||
936 | if (op1 != const0_rtx) | |
937 | return 0; | |
938 | } | |
939 | else | |
940 | return 0; | |
941 | ||
1c563bed | 942 | return gen_rtx_fmt_ee (code, VOIDmode, op0, op1); |
03984308 BW |
943 | } |
944 | ||
f90b7a5a | 945 | if (TARGET_HARD_FLOAT && mode == SFmode) |
03984308 BW |
946 | return gen_float_relational (code, op0, op1); |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
951 | ||
952 | int | |
ffbc8796 | 953 | xtensa_expand_conditional_move (rtx *operands, int isflt) |
03984308 | 954 | { |
f90b7a5a PB |
955 | rtx dest = operands[0]; |
956 | rtx cmp = operands[1]; | |
ef4bddc2 | 957 | machine_mode cmp_mode = GET_MODE (XEXP (cmp, 0)); |
ffbc8796 | 958 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 959 | |
f90b7a5a PB |
960 | if (!(cmp = gen_conditional_move (GET_CODE (cmp), cmp_mode, |
961 | XEXP (cmp, 0), XEXP (cmp, 1)))) | |
03984308 BW |
962 | return 0; |
963 | ||
964 | if (isflt) | |
f90b7a5a | 965 | gen_fn = (cmp_mode == SImode |
03984308 BW |
966 | ? gen_movsfcc_internal0 |
967 | : gen_movsfcc_internal1); | |
968 | else | |
f90b7a5a | 969 | gen_fn = (cmp_mode == SImode |
03984308 BW |
970 | ? gen_movsicc_internal0 |
971 | : gen_movsicc_internal1); | |
972 | ||
f90b7a5a | 973 | emit_insn (gen_fn (dest, XEXP (cmp, 0), operands[2], operands[3], cmp)); |
03984308 BW |
974 | return 1; |
975 | } | |
976 | ||
977 | ||
978 | int | |
ef4bddc2 | 979 | xtensa_expand_scc (rtx operands[4], machine_mode cmp_mode) |
03984308 BW |
980 | { |
981 | rtx dest = operands[0]; | |
f90b7a5a | 982 | rtx cmp; |
03984308 | 983 | rtx one_tmp, zero_tmp; |
ffbc8796 | 984 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 985 | |
f90b7a5a PB |
986 | if (!(cmp = gen_conditional_move (GET_CODE (operands[1]), cmp_mode, |
987 | operands[2], operands[3]))) | |
03984308 BW |
988 | return 0; |
989 | ||
990 | one_tmp = gen_reg_rtx (SImode); | |
991 | zero_tmp = gen_reg_rtx (SImode); | |
992 | emit_insn (gen_movsi (one_tmp, const_true_rtx)); | |
993 | emit_insn (gen_movsi (zero_tmp, const0_rtx)); | |
994 | ||
f90b7a5a | 995 | gen_fn = (cmp_mode == SImode |
03984308 BW |
996 | ? gen_movsicc_internal0 |
997 | : gen_movsicc_internal1); | |
998 | emit_insn (gen_fn (dest, XEXP (cmp, 0), one_tmp, zero_tmp, cmp)); | |
999 | return 1; | |
1000 | } | |
1001 | ||
1002 | ||
633e4eb4 BW |
1003 | /* Split OP[1] into OP[2,3] and likewise for OP[0] into OP[0,1]. MODE is |
1004 | for the output, i.e., the input operands are twice as big as MODE. */ | |
1005 | ||
1006 | void | |
ef4bddc2 | 1007 | xtensa_split_operand_pair (rtx operands[4], machine_mode mode) |
633e4eb4 BW |
1008 | { |
1009 | switch (GET_CODE (operands[1])) | |
1010 | { | |
1011 | case REG: | |
1012 | operands[3] = gen_rtx_REG (mode, REGNO (operands[1]) + 1); | |
1013 | operands[2] = gen_rtx_REG (mode, REGNO (operands[1])); | |
1014 | break; | |
1015 | ||
1016 | case MEM: | |
1017 | operands[3] = adjust_address (operands[1], mode, GET_MODE_SIZE (mode)); | |
1018 | operands[2] = adjust_address (operands[1], mode, 0); | |
1019 | break; | |
1020 | ||
1021 | case CONST_INT: | |
1022 | case CONST_DOUBLE: | |
1023 | split_double (operands[1], &operands[2], &operands[3]); | |
1024 | break; | |
1025 | ||
1026 | default: | |
177b6be0 | 1027 | gcc_unreachable (); |
633e4eb4 BW |
1028 | } |
1029 | ||
1030 | switch (GET_CODE (operands[0])) | |
1031 | { | |
1032 | case REG: | |
1033 | operands[1] = gen_rtx_REG (mode, REGNO (operands[0]) + 1); | |
1034 | operands[0] = gen_rtx_REG (mode, REGNO (operands[0])); | |
1035 | break; | |
1036 | ||
1037 | case MEM: | |
1038 | operands[1] = adjust_address (operands[0], mode, GET_MODE_SIZE (mode)); | |
1039 | operands[0] = adjust_address (operands[0], mode, 0); | |
1040 | break; | |
1041 | ||
1042 | default: | |
177b6be0 | 1043 | gcc_unreachable (); |
633e4eb4 BW |
1044 | } |
1045 | } | |
1046 | ||
1047 | ||
03984308 | 1048 | /* Emit insns to move operands[1] into operands[0]. |
03984308 BW |
1049 | Return 1 if we have written out everything that needs to be done to |
1050 | do the move. Otherwise, return 0 and the caller will emit the move | |
1051 | normally. */ | |
1052 | ||
1053 | int | |
ef4bddc2 | 1054 | xtensa_emit_move_sequence (rtx *operands, machine_mode mode) |
03984308 | 1055 | { |
6a7a462c BW |
1056 | rtx src = operands[1]; |
1057 | ||
1058 | if (CONSTANT_P (src) | |
1059 | && (GET_CODE (src) != CONST_INT || ! xtensa_simm12b (INTVAL (src)))) | |
03984308 | 1060 | { |
6a7a462c BW |
1061 | rtx dst = operands[0]; |
1062 | ||
1063 | if (xtensa_tls_referenced_p (src)) | |
1064 | { | |
1065 | rtx addend = NULL; | |
1066 | ||
1067 | if (GET_CODE (src) == CONST && GET_CODE (XEXP (src, 0)) == PLUS) | |
1068 | { | |
1069 | addend = XEXP (XEXP (src, 0), 1); | |
1070 | src = XEXP (XEXP (src, 0), 0); | |
1071 | } | |
1072 | ||
1073 | src = xtensa_legitimize_tls_address (src); | |
1074 | if (addend) | |
1075 | { | |
1076 | src = gen_rtx_PLUS (mode, src, addend); | |
1077 | src = force_operand (src, dst); | |
1078 | } | |
1079 | emit_move_insn (dst, src); | |
1080 | return 1; | |
1081 | } | |
1082 | ||
a024f514 | 1083 | if (! TARGET_AUTO_LITPOOLS && ! TARGET_CONST16) |
6a7a462c | 1084 | { |
64a54505 TJJS |
1085 | /* Try to emit MOVI + SLLI sequence, that is smaller |
1086 | than L32R + literal. */ | |
b552c4e6 MF |
1087 | if (optimize_size && mode == SImode && CONST_INT_P (src) |
1088 | && register_operand (dst, mode)) | |
64a54505 TJJS |
1089 | { |
1090 | HOST_WIDE_INT srcval = INTVAL (src); | |
1091 | int shift = ctz_hwi (srcval); | |
1092 | ||
1093 | if (xtensa_simm12b (srcval >> shift)) | |
1094 | { | |
1095 | emit_move_insn (dst, GEN_INT (srcval >> shift)); | |
1096 | emit_insn (gen_ashlsi3_internal (dst, dst, GEN_INT (shift))); | |
1097 | return 1; | |
1098 | } | |
1099 | } | |
1100 | ||
6a7a462c BW |
1101 | src = force_const_mem (SImode, src); |
1102 | operands[1] = src; | |
1103 | } | |
f42f5a1b BW |
1104 | |
1105 | /* PC-relative loads are always SImode, and CONST16 is only | |
1106 | supported in the movsi pattern, so add a SUBREG for any other | |
1107 | (smaller) mode. */ | |
1108 | ||
1109 | if (mode != SImode) | |
1110 | { | |
6a7a462c | 1111 | if (register_operand (dst, mode)) |
f42f5a1b | 1112 | { |
6a7a462c | 1113 | emit_move_insn (simplify_gen_subreg (SImode, dst, mode, 0), src); |
f42f5a1b BW |
1114 | return 1; |
1115 | } | |
1116 | else | |
1117 | { | |
6a7a462c BW |
1118 | src = force_reg (SImode, src); |
1119 | src = gen_lowpart_SUBREG (mode, src); | |
1120 | operands[1] = src; | |
f42f5a1b BW |
1121 | } |
1122 | } | |
03984308 BW |
1123 | } |
1124 | ||
997b8b4d BW |
1125 | if (!(reload_in_progress | reload_completed) |
1126 | && !xtensa_valid_move (mode, operands)) | |
1127 | operands[1] = force_reg (mode, operands[1]); | |
03984308 | 1128 | |
997b8b4d | 1129 | operands[1] = xtensa_copy_incoming_a7 (operands[1]); |
03984308 BW |
1130 | |
1131 | /* During reload we don't want to emit (subreg:X (mem:Y)) since that | |
638db43e BW |
1132 | instruction won't be recognized after reload, so we remove the |
1133 | subreg and adjust mem accordingly. */ | |
03984308 BW |
1134 | if (reload_in_progress) |
1135 | { | |
1136 | operands[0] = fixup_subreg_mem (operands[0]); | |
1137 | operands[1] = fixup_subreg_mem (operands[1]); | |
1138 | } | |
1139 | return 0; | |
1140 | } | |
1141 | ||
f42f5a1b | 1142 | |
03984308 | 1143 | static rtx |
ffbc8796 | 1144 | fixup_subreg_mem (rtx x) |
03984308 BW |
1145 | { |
1146 | if (GET_CODE (x) == SUBREG | |
1147 | && GET_CODE (SUBREG_REG (x)) == REG | |
1148 | && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER) | |
1149 | { | |
1150 | rtx temp = | |
1151 | gen_rtx_SUBREG (GET_MODE (x), | |
f2034d06 | 1152 | reg_equiv_mem (REGNO (SUBREG_REG (x))), |
03984308 | 1153 | SUBREG_BYTE (x)); |
55a2c322 | 1154 | x = alter_subreg (&temp, true); |
03984308 BW |
1155 | } |
1156 | return x; | |
1157 | } | |
1158 | ||
1159 | ||
997b8b4d BW |
1160 | /* Check if an incoming argument in a7 is expected to be used soon and |
1161 | if OPND is a register or register pair that includes a7. If so, | |
1162 | create a new pseudo and copy a7 into that pseudo at the very | |
1163 | beginning of the function, followed by the special "set_frame_ptr" | |
1164 | unspec_volatile insn. The return value is either the original | |
1165 | operand, if it is not a7, or the new pseudo containing a copy of | |
1166 | the incoming argument. This is necessary because the register | |
1167 | allocator will ignore conflicts with a7 and may either assign some | |
1168 | other pseudo to a7 or use a7 as the hard_frame_pointer, clobbering | |
1169 | the incoming argument in a7. By copying the argument out of a7 as | |
1170 | the very first thing, and then immediately following that with an | |
1171 | unspec_volatile to keep the scheduler away, we should avoid any | |
1172 | problems. Putting the set_frame_ptr insn at the beginning, with | |
1173 | only the a7 copy before it, also makes it easier for the prologue | |
1174 | expander to initialize the frame pointer after the a7 copy and to | |
1175 | fix up the a7 copy to use the stack pointer instead of the frame | |
1176 | pointer. */ | |
58db834b | 1177 | |
997b8b4d BW |
1178 | rtx |
1179 | xtensa_copy_incoming_a7 (rtx opnd) | |
58db834b | 1180 | { |
997b8b4d BW |
1181 | rtx entry_insns = 0; |
1182 | rtx reg, tmp; | |
ef4bddc2 | 1183 | machine_mode mode; |
997b8b4d BW |
1184 | |
1185 | if (!cfun->machine->need_a7_copy) | |
1186 | return opnd; | |
1187 | ||
1188 | /* This function should never be called again once a7 has been copied. */ | |
177b6be0 | 1189 | gcc_assert (!cfun->machine->set_frame_ptr_insn); |
997b8b4d BW |
1190 | |
1191 | mode = GET_MODE (opnd); | |
1192 | ||
1193 | /* The operand using a7 may come in a later instruction, so just return | |
1194 | the original operand if it doesn't use a7. */ | |
1195 | reg = opnd; | |
1196 | if (GET_CODE (reg) == SUBREG) | |
58db834b | 1197 | { |
177b6be0 | 1198 | gcc_assert (SUBREG_BYTE (reg) == 0); |
997b8b4d BW |
1199 | reg = SUBREG_REG (reg); |
1200 | } | |
1201 | if (GET_CODE (reg) != REG | |
1202 | || REGNO (reg) > A7_REG | |
a93072ca | 1203 | || REGNO (reg) + hard_regno_nregs (A7_REG, mode) <= A7_REG) |
997b8b4d | 1204 | return opnd; |
e6aecf8e | 1205 | |
997b8b4d | 1206 | /* 1-word args will always be in a7; 2-word args in a6/a7. */ |
a93072ca | 1207 | gcc_assert (REGNO (reg) + hard_regno_nregs (A7_REG, mode) - 1 == A7_REG); |
58db834b | 1208 | |
997b8b4d | 1209 | cfun->machine->need_a7_copy = false; |
58db834b | 1210 | |
997b8b4d BW |
1211 | /* Copy a7 to a new pseudo at the function entry. Use gen_raw_REG to |
1212 | create the REG for a7 so that hard_frame_pointer_rtx is not used. */ | |
58db834b | 1213 | |
0d8442b8 | 1214 | start_sequence (); |
997b8b4d | 1215 | tmp = gen_reg_rtx (mode); |
58db834b | 1216 | |
997b8b4d BW |
1217 | switch (mode) |
1218 | { | |
4e10a5a7 RS |
1219 | case E_DFmode: |
1220 | case E_DImode: | |
b412869c BW |
1221 | /* Copy the value out of A7 here but keep the first word in A6 until |
1222 | after the set_frame_ptr insn. Otherwise, the register allocator | |
1223 | may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming | |
1224 | value. */ | |
997b8b4d BW |
1225 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), |
1226 | gen_raw_REG (SImode, A7_REG))); | |
1227 | break; | |
4e10a5a7 | 1228 | case E_SFmode: |
997b8b4d BW |
1229 | emit_insn (gen_movsf_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1230 | break; | |
4e10a5a7 | 1231 | case E_SImode: |
997b8b4d BW |
1232 | emit_insn (gen_movsi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1233 | break; | |
4e10a5a7 | 1234 | case E_HImode: |
997b8b4d BW |
1235 | emit_insn (gen_movhi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1236 | break; | |
4e10a5a7 | 1237 | case E_QImode: |
997b8b4d BW |
1238 | emit_insn (gen_movqi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1239 | break; | |
1240 | default: | |
177b6be0 | 1241 | gcc_unreachable (); |
58db834b BW |
1242 | } |
1243 | ||
997b8b4d | 1244 | cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); |
b412869c BW |
1245 | |
1246 | /* For DF and DI mode arguments, copy the incoming value in A6 now. */ | |
1247 | if (mode == DFmode || mode == DImode) | |
1248 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), | |
1249 | gen_rtx_REG (SImode, A7_REG - 1))); | |
997b8b4d BW |
1250 | entry_insns = get_insns (); |
1251 | end_sequence (); | |
1252 | ||
1253 | if (cfun->machine->vararg_a7) | |
1254 | { | |
0d8442b8 BW |
1255 | /* This is called from within builtin_saveregs, which will insert the |
1256 | saveregs code at the function entry, ahead of anything placed at | |
1257 | the function entry now. Instead, save the sequence to be inserted | |
1258 | at the beginning of the saveregs code. */ | |
1259 | cfun->machine->vararg_a7_copy = entry_insns; | |
997b8b4d BW |
1260 | } |
1261 | else | |
1262 | { | |
1263 | /* Put entry_insns after the NOTE that starts the function. If | |
1264 | this is inside a start_sequence, make the outer-level insn | |
1265 | chain current, so the code is placed at the start of the | |
1266 | function. */ | |
1267 | push_topmost_sequence (); | |
0d8442b8 BW |
1268 | /* Do not use entry_of_function() here. This is called from within |
1269 | expand_function_start, when the CFG still holds GIMPLE. */ | |
997b8b4d BW |
1270 | emit_insn_after (entry_insns, get_insns ()); |
1271 | pop_topmost_sequence (); | |
1272 | } | |
1273 | ||
1274 | return tmp; | |
58db834b BW |
1275 | } |
1276 | ||
1277 | ||
a46bbb5a BW |
1278 | /* Try to expand a block move operation to a sequence of RTL move |
1279 | instructions. If not optimizing, or if the block size is not a | |
1280 | constant, or if the block is too large, the expansion fails and GCC | |
1281 | falls back to calling memcpy(). | |
03984308 BW |
1282 | |
1283 | operands[0] is the destination | |
1284 | operands[1] is the source | |
1285 | operands[2] is the length | |
1286 | operands[3] is the alignment */ | |
1287 | ||
1288 | int | |
ffbc8796 | 1289 | xtensa_expand_block_move (rtx *operands) |
03984308 | 1290 | { |
ef4bddc2 | 1291 | static const machine_mode mode_from_align[] = |
7eda7cda RH |
1292 | { |
1293 | VOIDmode, QImode, HImode, VOIDmode, SImode, | |
1294 | }; | |
1295 | ||
1296 | rtx dst_mem = operands[0]; | |
1297 | rtx src_mem = operands[1]; | |
1298 | HOST_WIDE_INT bytes, align; | |
03984308 | 1299 | int num_pieces, move_ratio; |
7eda7cda | 1300 | rtx temp[2]; |
ef4bddc2 | 1301 | machine_mode mode[2]; |
7eda7cda RH |
1302 | int amount[2]; |
1303 | bool active[2]; | |
1304 | int phase = 0; | |
1305 | int next; | |
1306 | int offset_ld = 0; | |
1307 | int offset_st = 0; | |
1308 | rtx x; | |
03984308 | 1309 | |
3bbc2af6 | 1310 | /* If this is not a fixed size move, just call memcpy. */ |
03984308 BW |
1311 | if (!optimize || (GET_CODE (operands[2]) != CONST_INT)) |
1312 | return 0; | |
1313 | ||
7eda7cda RH |
1314 | bytes = INTVAL (operands[2]); |
1315 | align = INTVAL (operands[3]); | |
1316 | ||
3bbc2af6 | 1317 | /* Anything to move? */ |
03984308 | 1318 | if (bytes <= 0) |
7eda7cda | 1319 | return 0; |
03984308 BW |
1320 | |
1321 | if (align > MOVE_MAX) | |
1322 | align = MOVE_MAX; | |
1323 | ||
3bbc2af6 | 1324 | /* Decide whether to expand inline based on the optimization level. */ |
03984308 BW |
1325 | move_ratio = 4; |
1326 | if (optimize > 2) | |
1327 | move_ratio = LARGEST_MOVE_RATIO; | |
3bbc2af6 | 1328 | num_pieces = (bytes / align) + (bytes % align); /* Close enough anyway. */ |
7eda7cda | 1329 | if (num_pieces > move_ratio) |
03984308 BW |
1330 | return 0; |
1331 | ||
7eda7cda RH |
1332 | x = XEXP (dst_mem, 0); |
1333 | if (!REG_P (x)) | |
1334 | { | |
1335 | x = force_reg (Pmode, x); | |
1336 | dst_mem = replace_equiv_address (dst_mem, x); | |
1337 | } | |
03984308 | 1338 | |
7eda7cda RH |
1339 | x = XEXP (src_mem, 0); |
1340 | if (!REG_P (x)) | |
1341 | { | |
1342 | x = force_reg (Pmode, x); | |
1343 | src_mem = replace_equiv_address (src_mem, x); | |
1344 | } | |
03984308 | 1345 | |
7eda7cda | 1346 | active[0] = active[1] = false; |
03984308 | 1347 | |
7eda7cda | 1348 | do |
03984308 | 1349 | { |
7eda7cda RH |
1350 | next = phase; |
1351 | phase ^= 1; | |
03984308 | 1352 | |
7eda7cda | 1353 | if (bytes > 0) |
03984308 | 1354 | { |
7eda7cda | 1355 | int next_amount; |
03984308 | 1356 | |
7eda7cda RH |
1357 | next_amount = (bytes >= 4 ? 4 : (bytes >= 2 ? 2 : 1)); |
1358 | next_amount = MIN (next_amount, align); | |
03984308 | 1359 | |
7eda7cda RH |
1360 | amount[next] = next_amount; |
1361 | mode[next] = mode_from_align[next_amount]; | |
1362 | temp[next] = gen_reg_rtx (mode[next]); | |
03984308 | 1363 | |
7eda7cda | 1364 | x = adjust_address (src_mem, mode[next], offset_ld); |
f7df4a84 | 1365 | emit_insn (gen_rtx_SET (temp[next], x)); |
03984308 | 1366 | |
7eda7cda RH |
1367 | offset_ld += next_amount; |
1368 | bytes -= next_amount; | |
1369 | active[next] = true; | |
1370 | } | |
03984308 | 1371 | |
7eda7cda RH |
1372 | if (active[phase]) |
1373 | { | |
1374 | active[phase] = false; | |
1375 | ||
1376 | x = adjust_address (dst_mem, mode[phase], offset_st); | |
f7df4a84 | 1377 | emit_insn (gen_rtx_SET (x, temp[phase])); |
03984308 | 1378 | |
7eda7cda RH |
1379 | offset_st += amount[phase]; |
1380 | } | |
03984308 | 1381 | } |
7eda7cda | 1382 | while (active[next]); |
03984308 | 1383 | |
7eda7cda | 1384 | return 1; |
03984308 BW |
1385 | } |
1386 | ||
1387 | ||
1388 | void | |
ffbc8796 | 1389 | xtensa_expand_nonlocal_goto (rtx *operands) |
03984308 BW |
1390 | { |
1391 | rtx goto_handler = operands[1]; | |
1392 | rtx containing_fp = operands[3]; | |
1393 | ||
3bbc2af6 KH |
1394 | /* Generate a call to "__xtensa_nonlocal_goto" (in libgcc); the code |
1395 | is too big to generate in-line. */ | |
03984308 BW |
1396 | |
1397 | if (GET_CODE (containing_fp) != REG) | |
1398 | containing_fp = force_reg (Pmode, containing_fp); | |
1399 | ||
03984308 | 1400 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_nonlocal_goto"), |
db69559b | 1401 | LCT_NORMAL, VOIDmode, |
03984308 BW |
1402 | containing_fp, Pmode, |
1403 | goto_handler, Pmode); | |
1404 | } | |
1405 | ||
1406 | ||
e2500fed | 1407 | static struct machine_function * |
ffbc8796 | 1408 | xtensa_init_machine_status (void) |
03984308 | 1409 | { |
766090c2 | 1410 | return ggc_cleared_alloc<machine_function> (); |
03984308 BW |
1411 | } |
1412 | ||
1413 | ||
2a48b790 BW |
1414 | /* Shift VAL of mode MODE left by COUNT bits. */ |
1415 | ||
1416 | static inline rtx | |
ef4bddc2 | 1417 | xtensa_expand_mask_and_shift (rtx val, machine_mode mode, rtx count) |
2a48b790 BW |
1418 | { |
1419 | val = expand_simple_binop (SImode, AND, val, GEN_INT (GET_MODE_MASK (mode)), | |
1420 | NULL_RTX, 1, OPTAB_DIRECT); | |
1421 | return expand_simple_binop (SImode, ASHIFT, val, count, | |
1422 | NULL_RTX, 1, OPTAB_DIRECT); | |
1423 | } | |
1424 | ||
1425 | ||
1426 | /* Structure to hold the initial parameters for a compare_and_swap operation | |
1427 | in HImode and QImode. */ | |
1428 | ||
1429 | struct alignment_context | |
1430 | { | |
1431 | rtx memsi; /* SI aligned memory location. */ | |
1432 | rtx shift; /* Bit offset with regard to lsb. */ | |
1433 | rtx modemask; /* Mask of the HQImode shifted by SHIFT bits. */ | |
1434 | rtx modemaski; /* ~modemask */ | |
1435 | }; | |
1436 | ||
1437 | ||
1438 | /* Initialize structure AC for word access to HI and QI mode memory. */ | |
1439 | ||
1440 | static void | |
1441 | init_alignment_context (struct alignment_context *ac, rtx mem) | |
1442 | { | |
ef4bddc2 | 1443 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1444 | rtx byteoffset = NULL_RTX; |
1445 | bool aligned = (MEM_ALIGN (mem) >= GET_MODE_BITSIZE (SImode)); | |
1446 | ||
1447 | if (aligned) | |
1448 | ac->memsi = adjust_address (mem, SImode, 0); /* Memory is aligned. */ | |
1449 | else | |
1450 | { | |
1451 | /* Alignment is unknown. */ | |
1452 | rtx addr, align; | |
1453 | ||
1454 | /* Force the address into a register. */ | |
1455 | addr = force_reg (Pmode, XEXP (mem, 0)); | |
1456 | ||
1457 | /* Align it to SImode. */ | |
1458 | align = expand_simple_binop (Pmode, AND, addr, | |
1459 | GEN_INT (-GET_MODE_SIZE (SImode)), | |
1460 | NULL_RTX, 1, OPTAB_DIRECT); | |
1461 | /* Generate MEM. */ | |
1462 | ac->memsi = gen_rtx_MEM (SImode, align); | |
1463 | MEM_VOLATILE_P (ac->memsi) = MEM_VOLATILE_P (mem); | |
1464 | set_mem_alias_set (ac->memsi, ALIAS_SET_MEMORY_BARRIER); | |
1465 | set_mem_align (ac->memsi, GET_MODE_BITSIZE (SImode)); | |
1466 | ||
1467 | byteoffset = expand_simple_binop (Pmode, AND, addr, | |
1468 | GEN_INT (GET_MODE_SIZE (SImode) - 1), | |
1469 | NULL_RTX, 1, OPTAB_DIRECT); | |
1470 | } | |
1471 | ||
1472 | /* Calculate shiftcount. */ | |
1473 | if (TARGET_BIG_ENDIAN) | |
1474 | { | |
1475 | ac->shift = GEN_INT (GET_MODE_SIZE (SImode) - GET_MODE_SIZE (mode)); | |
1476 | if (!aligned) | |
1477 | ac->shift = expand_simple_binop (SImode, MINUS, ac->shift, byteoffset, | |
1478 | NULL_RTX, 1, OPTAB_DIRECT); | |
1479 | } | |
1480 | else | |
1481 | { | |
1482 | if (aligned) | |
1483 | ac->shift = NULL_RTX; | |
1484 | else | |
1485 | ac->shift = byteoffset; | |
1486 | } | |
1487 | ||
1488 | if (ac->shift != NULL_RTX) | |
1489 | { | |
1490 | /* Shift is the byte count, but we need the bitcount. */ | |
91767ed1 MF |
1491 | gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0); |
1492 | ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift, | |
1493 | GEN_INT (exact_log2 (BITS_PER_UNIT)), | |
2a48b790 BW |
1494 | NULL_RTX, 1, OPTAB_DIRECT); |
1495 | ac->modemask = expand_simple_binop (SImode, ASHIFT, | |
1496 | GEN_INT (GET_MODE_MASK (mode)), | |
1497 | ac->shift, | |
1498 | NULL_RTX, 1, OPTAB_DIRECT); | |
1499 | } | |
1500 | else | |
1501 | ac->modemask = GEN_INT (GET_MODE_MASK (mode)); | |
1502 | ||
1503 | ac->modemaski = expand_simple_unop (SImode, NOT, ac->modemask, NULL_RTX, 1); | |
1504 | } | |
1505 | ||
1506 | ||
1507 | /* Expand an atomic compare and swap operation for HImode and QImode. | |
1508 | MEM is the memory location, CMP the old value to compare MEM with | |
0a2aaacc | 1509 | and NEW_RTX the value to set if CMP == MEM. */ |
2a48b790 BW |
1510 | |
1511 | void | |
0a2aaacc | 1512 | xtensa_expand_compare_and_swap (rtx target, rtx mem, rtx cmp, rtx new_rtx) |
2a48b790 | 1513 | { |
ef4bddc2 | 1514 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1515 | struct alignment_context ac; |
1516 | rtx tmp, cmpv, newv, val; | |
1517 | rtx oldval = gen_reg_rtx (SImode); | |
1518 | rtx res = gen_reg_rtx (SImode); | |
240a513f DM |
1519 | rtx_code_label *csloop = gen_label_rtx (); |
1520 | rtx_code_label *csend = gen_label_rtx (); | |
2a48b790 BW |
1521 | |
1522 | init_alignment_context (&ac, mem); | |
1523 | ||
1524 | if (ac.shift != NULL_RTX) | |
1525 | { | |
1526 | cmp = xtensa_expand_mask_and_shift (cmp, mode, ac.shift); | |
0a2aaacc | 1527 | new_rtx = xtensa_expand_mask_and_shift (new_rtx, mode, ac.shift); |
2a48b790 BW |
1528 | } |
1529 | ||
1530 | /* Load the surrounding word into VAL with the MEM value masked out. */ | |
1531 | val = force_reg (SImode, expand_simple_binop (SImode, AND, ac.memsi, | |
1532 | ac.modemaski, NULL_RTX, 1, | |
1533 | OPTAB_DIRECT)); | |
1534 | emit_label (csloop); | |
1535 | ||
0a2aaacc | 1536 | /* Patch CMP and NEW_RTX into VAL at correct position. */ |
2a48b790 BW |
1537 | cmpv = force_reg (SImode, expand_simple_binop (SImode, IOR, cmp, val, |
1538 | NULL_RTX, 1, OPTAB_DIRECT)); | |
0a2aaacc | 1539 | newv = force_reg (SImode, expand_simple_binop (SImode, IOR, new_rtx, val, |
2a48b790 BW |
1540 | NULL_RTX, 1, OPTAB_DIRECT)); |
1541 | ||
1542 | /* Jump to end if we're done. */ | |
1543 | emit_insn (gen_sync_compare_and_swapsi (res, ac.memsi, cmpv, newv)); | |
1544 | emit_cmp_and_jump_insns (res, cmpv, EQ, const0_rtx, SImode, true, csend); | |
1545 | ||
1546 | /* Check for changes outside mode. */ | |
1547 | emit_move_insn (oldval, val); | |
1548 | tmp = expand_simple_binop (SImode, AND, res, ac.modemaski, | |
1549 | val, 1, OPTAB_DIRECT); | |
1550 | if (tmp != val) | |
1551 | emit_move_insn (val, tmp); | |
1552 | ||
1553 | /* Loop internal if so. */ | |
1554 | emit_cmp_and_jump_insns (oldval, val, NE, const0_rtx, SImode, true, csloop); | |
1555 | ||
1556 | emit_label (csend); | |
1557 | ||
1558 | /* Return the correct part of the bitfield. */ | |
1559 | convert_move (target, | |
1560 | (ac.shift == NULL_RTX ? res | |
1561 | : expand_simple_binop (SImode, LSHIFTRT, res, ac.shift, | |
1562 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1563 | 1); | |
1564 | } | |
1565 | ||
1566 | ||
1567 | /* Expand an atomic operation CODE of mode MODE (either HImode or QImode -- | |
1568 | the default expansion works fine for SImode). MEM is the memory location | |
1569 | and VAL the value to play with. If AFTER is true then store the value | |
1570 | MEM holds after the operation, if AFTER is false then store the value MEM | |
1571 | holds before the operation. If TARGET is zero then discard that value, else | |
1572 | store it to TARGET. */ | |
1573 | ||
1574 | void | |
1575 | xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val, | |
1576 | bool after) | |
1577 | { | |
ef4bddc2 | 1578 | machine_mode mode = GET_MODE (mem); |
2a48b790 | 1579 | struct alignment_context ac; |
240a513f | 1580 | rtx_code_label *csloop = gen_label_rtx (); |
2a48b790 BW |
1581 | rtx cmp, tmp; |
1582 | rtx old = gen_reg_rtx (SImode); | |
0a2aaacc | 1583 | rtx new_rtx = gen_reg_rtx (SImode); |
2a48b790 BW |
1584 | rtx orig = NULL_RTX; |
1585 | ||
1586 | init_alignment_context (&ac, mem); | |
1587 | ||
1588 | /* Prepare values before the compare-and-swap loop. */ | |
1589 | if (ac.shift != NULL_RTX) | |
1590 | val = xtensa_expand_mask_and_shift (val, mode, ac.shift); | |
1591 | switch (code) | |
1592 | { | |
1593 | case PLUS: | |
1594 | case MINUS: | |
1595 | orig = gen_reg_rtx (SImode); | |
1596 | convert_move (orig, val, 1); | |
1597 | break; | |
1598 | ||
1599 | case SET: | |
1600 | case IOR: | |
1601 | case XOR: | |
1602 | break; | |
1603 | ||
1604 | case MULT: /* NAND */ | |
1605 | case AND: | |
1606 | /* val = "11..1<val>11..1" */ | |
1607 | val = expand_simple_binop (SImode, XOR, val, ac.modemaski, | |
1608 | NULL_RTX, 1, OPTAB_DIRECT); | |
1609 | break; | |
1610 | ||
1611 | default: | |
1612 | gcc_unreachable (); | |
1613 | } | |
1614 | ||
1615 | /* Load full word. Subsequent loads are performed by S32C1I. */ | |
1616 | cmp = force_reg (SImode, ac.memsi); | |
1617 | ||
1618 | emit_label (csloop); | |
1619 | emit_move_insn (old, cmp); | |
1620 | ||
1621 | switch (code) | |
1622 | { | |
1623 | case PLUS: | |
1624 | case MINUS: | |
1625 | val = expand_simple_binop (SImode, code, old, orig, | |
1626 | NULL_RTX, 1, OPTAB_DIRECT); | |
1627 | val = expand_simple_binop (SImode, AND, val, ac.modemask, | |
1628 | NULL_RTX, 1, OPTAB_DIRECT); | |
1629 | /* FALLTHRU */ | |
1630 | case SET: | |
1631 | tmp = expand_simple_binop (SImode, AND, old, ac.modemaski, | |
1632 | NULL_RTX, 1, OPTAB_DIRECT); | |
1633 | tmp = expand_simple_binop (SImode, IOR, tmp, val, | |
0a2aaacc | 1634 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1635 | break; |
1636 | ||
1637 | case AND: | |
1638 | case IOR: | |
1639 | case XOR: | |
1640 | tmp = expand_simple_binop (SImode, code, old, val, | |
0a2aaacc | 1641 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1642 | break; |
1643 | ||
1644 | case MULT: /* NAND */ | |
2a17b239 | 1645 | tmp = expand_simple_binop (SImode, AND, old, val, |
2a48b790 | 1646 | NULL_RTX, 1, OPTAB_DIRECT); |
2a17b239 | 1647 | tmp = expand_simple_binop (SImode, XOR, tmp, ac.modemask, |
0a2aaacc | 1648 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1649 | break; |
1650 | ||
1651 | default: | |
1652 | gcc_unreachable (); | |
1653 | } | |
1654 | ||
0a2aaacc KG |
1655 | if (tmp != new_rtx) |
1656 | emit_move_insn (new_rtx, tmp); | |
1657 | emit_insn (gen_sync_compare_and_swapsi (cmp, ac.memsi, old, new_rtx)); | |
2a48b790 BW |
1658 | emit_cmp_and_jump_insns (cmp, old, NE, const0_rtx, SImode, true, csloop); |
1659 | ||
1660 | if (target) | |
1661 | { | |
0a2aaacc | 1662 | tmp = (after ? new_rtx : cmp); |
2a48b790 BW |
1663 | convert_move (target, |
1664 | (ac.shift == NULL_RTX ? tmp | |
1665 | : expand_simple_binop (SImode, LSHIFTRT, tmp, ac.shift, | |
1666 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1667 | 1); | |
1668 | } | |
1669 | } | |
1670 | ||
1671 | ||
03984308 | 1672 | void |
ffbc8796 | 1673 | xtensa_setup_frame_addresses (void) |
03984308 | 1674 | { |
b52b1749 | 1675 | /* Set flag to cause TARGET_FRAME_POINTER_REQUIRED to return true. */ |
03984308 BW |
1676 | cfun->machine->accesses_prev_frame = 1; |
1677 | ||
590e2636 MF |
1678 | if (TARGET_WINDOWED_ABI) |
1679 | emit_library_call | |
1680 | (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_libgcc_window_spill"), | |
db69559b | 1681 | LCT_NORMAL, VOIDmode); |
03984308 BW |
1682 | } |
1683 | ||
1684 | ||
638db43e BW |
1685 | /* Emit the assembly for the end of a zero-cost loop. Normally we just emit |
1686 | a comment showing where the end of the loop is. However, if there is a | |
03984308 | 1687 | label or a branch at the end of the loop then we need to place a nop |
638db43e | 1688 | there. If the loop ends with a label we need the nop so that branches |
839a4992 KH |
1689 | targeting that label will target the nop (and thus remain in the loop), |
1690 | instead of targeting the instruction after the loop (and thus exiting | |
638db43e | 1691 | the loop). If the loop ends with a branch, we need the nop in case the |
839a4992 | 1692 | branch is targeting a location inside the loop. When the branch |
03984308 BW |
1693 | executes it will cause the loop count to be decremented even if it is |
1694 | taken (because it is the last instruction in the loop), so we need to | |
1695 | nop after the branch to prevent the loop count from being decremented | |
638db43e | 1696 | when the branch is taken. */ |
03984308 BW |
1697 | |
1698 | void | |
240a513f | 1699 | xtensa_emit_loop_end (rtx_insn *insn, rtx *operands) |
03984308 BW |
1700 | { |
1701 | char done = 0; | |
1702 | ||
1703 | for (insn = PREV_INSN (insn); insn && !done; insn = PREV_INSN (insn)) | |
1704 | { | |
1705 | switch (GET_CODE (insn)) | |
1706 | { | |
1707 | case NOTE: | |
1708 | case BARRIER: | |
1709 | break; | |
1710 | ||
1711 | case CODE_LABEL: | |
0bd0703d | 1712 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1713 | done = 1; |
1714 | break; | |
1715 | ||
1716 | default: | |
1717 | { | |
1718 | rtx body = PATTERN (insn); | |
1719 | ||
b64925dc | 1720 | if (JUMP_P (body)) |
03984308 | 1721 | { |
0bd0703d | 1722 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1723 | done = 1; |
1724 | } | |
1725 | else if ((GET_CODE (body) != USE) | |
1726 | && (GET_CODE (body) != CLOBBER)) | |
1727 | done = 1; | |
1728 | } | |
1729 | break; | |
1730 | } | |
1731 | } | |
1732 | ||
6383386a | 1733 | output_asm_insn ("%1_LEND:", operands); |
03984308 BW |
1734 | } |
1735 | ||
1736 | ||
036a2b7a BW |
1737 | char * |
1738 | xtensa_emit_branch (bool inverted, bool immed, rtx *operands) | |
1739 | { | |
1740 | static char result[64]; | |
1741 | enum rtx_code code; | |
1742 | const char *op; | |
1743 | ||
1744 | code = GET_CODE (operands[3]); | |
1745 | switch (code) | |
1746 | { | |
1747 | case EQ: op = inverted ? "ne" : "eq"; break; | |
1748 | case NE: op = inverted ? "eq" : "ne"; break; | |
1749 | case LT: op = inverted ? "ge" : "lt"; break; | |
1750 | case GE: op = inverted ? "lt" : "ge"; break; | |
1751 | case LTU: op = inverted ? "geu" : "ltu"; break; | |
1752 | case GEU: op = inverted ? "ltu" : "geu"; break; | |
1753 | default: gcc_unreachable (); | |
1754 | } | |
1755 | ||
1756 | if (immed) | |
1757 | { | |
1758 | if (INTVAL (operands[1]) == 0) | |
1759 | sprintf (result, "b%sz%s\t%%0, %%2", op, | |
1760 | (TARGET_DENSITY && (code == EQ || code == NE)) ? ".n" : ""); | |
1761 | else | |
1762 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1763 | } | |
1764 | else | |
1765 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1766 | ||
1767 | return result; | |
1768 | } | |
1769 | ||
1770 | ||
1771 | char * | |
1772 | xtensa_emit_bit_branch (bool inverted, bool immed, rtx *operands) | |
1773 | { | |
1774 | static char result[64]; | |
1775 | const char *op; | |
1776 | ||
1777 | switch (GET_CODE (operands[3])) | |
1778 | { | |
1779 | case EQ: op = inverted ? "bs" : "bc"; break; | |
1780 | case NE: op = inverted ? "bc" : "bs"; break; | |
1781 | default: gcc_unreachable (); | |
1782 | } | |
1783 | ||
1784 | if (immed) | |
1785 | { | |
1786 | unsigned bitnum = INTVAL (operands[1]) & 0x1f; | |
1787 | operands[1] = GEN_INT (bitnum); | |
1788 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1789 | } | |
1790 | else | |
1791 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1792 | ||
1793 | return result; | |
1794 | } | |
1795 | ||
1796 | ||
1797 | char * | |
1798 | xtensa_emit_movcc (bool inverted, bool isfp, bool isbool, rtx *operands) | |
1799 | { | |
1800 | static char result[64]; | |
1801 | enum rtx_code code; | |
1802 | const char *op; | |
1803 | ||
1804 | code = GET_CODE (operands[4]); | |
1805 | if (isbool) | |
1806 | { | |
1807 | switch (code) | |
1808 | { | |
1809 | case EQ: op = inverted ? "t" : "f"; break; | |
1810 | case NE: op = inverted ? "f" : "t"; break; | |
1811 | default: gcc_unreachable (); | |
1812 | } | |
1813 | } | |
1814 | else | |
1815 | { | |
1816 | switch (code) | |
1817 | { | |
1818 | case EQ: op = inverted ? "nez" : "eqz"; break; | |
1819 | case NE: op = inverted ? "eqz" : "nez"; break; | |
1820 | case LT: op = inverted ? "gez" : "ltz"; break; | |
1821 | case GE: op = inverted ? "ltz" : "gez"; break; | |
1822 | default: gcc_unreachable (); | |
1823 | } | |
1824 | } | |
1825 | ||
1826 | sprintf (result, "mov%s%s\t%%0, %%%d, %%1", | |
1827 | op, isfp ? ".s" : "", inverted ? 3 : 2); | |
1828 | return result; | |
1829 | } | |
1830 | ||
1831 | ||
03984308 | 1832 | char * |
ffbc8796 | 1833 | xtensa_emit_call (int callop, rtx *operands) |
03984308 | 1834 | { |
b64a1b53 | 1835 | static char result[64]; |
03984308 BW |
1836 | rtx tgt = operands[callop]; |
1837 | ||
1838 | if (GET_CODE (tgt) == CONST_INT) | |
3904010d MF |
1839 | sprintf (result, "call%d\t" HOST_WIDE_INT_PRINT_HEX, |
1840 | WINDOW_SIZE, INTVAL (tgt)); | |
03984308 | 1841 | else if (register_operand (tgt, VOIDmode)) |
590e2636 | 1842 | sprintf (result, "callx%d\t%%%d", WINDOW_SIZE, callop); |
03984308 | 1843 | else |
590e2636 | 1844 | sprintf (result, "call%d\t%%%d", WINDOW_SIZE, callop); |
03984308 BW |
1845 | |
1846 | return result; | |
1847 | } | |
1848 | ||
1849 | ||
da1f39e4 | 1850 | bool |
ef4bddc2 | 1851 | xtensa_legitimate_address_p (machine_mode mode, rtx addr, bool strict) |
da1f39e4 BW |
1852 | { |
1853 | /* Allow constant pool addresses. */ | |
1854 | if (mode != BLKmode && GET_MODE_SIZE (mode) >= UNITS_PER_WORD | |
6a7a462c BW |
1855 | && ! TARGET_CONST16 && constantpool_address_p (addr) |
1856 | && ! xtensa_tls_referenced_p (addr)) | |
da1f39e4 BW |
1857 | return true; |
1858 | ||
1859 | while (GET_CODE (addr) == SUBREG) | |
1860 | addr = SUBREG_REG (addr); | |
1861 | ||
1862 | /* Allow base registers. */ | |
1863 | if (GET_CODE (addr) == REG && BASE_REG_P (addr, strict)) | |
1864 | return true; | |
1865 | ||
1866 | /* Check for "register + offset" addressing. */ | |
1867 | if (GET_CODE (addr) == PLUS) | |
1868 | { | |
1869 | rtx xplus0 = XEXP (addr, 0); | |
1870 | rtx xplus1 = XEXP (addr, 1); | |
1871 | enum rtx_code code0; | |
1872 | enum rtx_code code1; | |
1873 | ||
1874 | while (GET_CODE (xplus0) == SUBREG) | |
1875 | xplus0 = SUBREG_REG (xplus0); | |
1876 | code0 = GET_CODE (xplus0); | |
1877 | ||
1878 | while (GET_CODE (xplus1) == SUBREG) | |
1879 | xplus1 = SUBREG_REG (xplus1); | |
1880 | code1 = GET_CODE (xplus1); | |
1881 | ||
1882 | /* Swap operands if necessary so the register is first. */ | |
1883 | if (code0 != REG && code1 == REG) | |
1884 | { | |
1885 | xplus0 = XEXP (addr, 1); | |
1886 | xplus1 = XEXP (addr, 0); | |
1887 | code0 = GET_CODE (xplus0); | |
1888 | code1 = GET_CODE (xplus1); | |
1889 | } | |
1890 | ||
1891 | if (code0 == REG && BASE_REG_P (xplus0, strict) | |
1892 | && code1 == CONST_INT | |
1893 | && xtensa_mem_offset (INTVAL (xplus1), mode)) | |
1894 | return true; | |
1895 | } | |
1896 | ||
1897 | return false; | |
1898 | } | |
1899 | ||
1900 | ||
6a7a462c BW |
1901 | /* Construct the SYMBOL_REF for the _TLS_MODULE_BASE_ symbol. */ |
1902 | ||
1903 | static GTY(()) rtx xtensa_tls_module_base_symbol; | |
1904 | ||
1905 | static rtx | |
1906 | xtensa_tls_module_base (void) | |
1907 | { | |
1908 | if (! xtensa_tls_module_base_symbol) | |
1909 | { | |
1910 | xtensa_tls_module_base_symbol = | |
1911 | gen_rtx_SYMBOL_REF (Pmode, "_TLS_MODULE_BASE_"); | |
1912 | SYMBOL_REF_FLAGS (xtensa_tls_module_base_symbol) | |
1913 | |= TLS_MODEL_GLOBAL_DYNAMIC << SYMBOL_FLAG_TLS_SHIFT; | |
1914 | } | |
1915 | ||
1916 | return xtensa_tls_module_base_symbol; | |
1917 | } | |
1918 | ||
1919 | ||
240a513f | 1920 | static rtx_insn * |
6a7a462c BW |
1921 | xtensa_call_tls_desc (rtx sym, rtx *retp) |
1922 | { | |
e1b8828b | 1923 | rtx fn, arg, a_io; |
240a513f | 1924 | rtx_insn *call_insn, *insns; |
6a7a462c BW |
1925 | |
1926 | start_sequence (); | |
1927 | fn = gen_reg_rtx (Pmode); | |
1928 | arg = gen_reg_rtx (Pmode); | |
e1b8828b | 1929 | a_io = gen_rtx_REG (Pmode, WINDOW_SIZE + 2); |
6a7a462c BW |
1930 | |
1931 | emit_insn (gen_tls_func (fn, sym)); | |
1932 | emit_insn (gen_tls_arg (arg, sym)); | |
e1b8828b MF |
1933 | emit_move_insn (a_io, arg); |
1934 | call_insn = emit_call_insn (gen_tls_call (a_io, fn, sym, const1_rtx)); | |
1935 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), a_io); | |
6a7a462c BW |
1936 | insns = get_insns (); |
1937 | end_sequence (); | |
1938 | ||
e1b8828b | 1939 | *retp = a_io; |
6a7a462c BW |
1940 | return insns; |
1941 | } | |
1942 | ||
1943 | ||
1944 | static rtx | |
1945 | xtensa_legitimize_tls_address (rtx x) | |
1946 | { | |
1947 | unsigned int model = SYMBOL_REF_TLS_MODEL (x); | |
240a513f DM |
1948 | rtx dest, tp, ret, modbase, base, addend; |
1949 | rtx_insn *insns; | |
6a7a462c BW |
1950 | |
1951 | dest = gen_reg_rtx (Pmode); | |
1952 | switch (model) | |
1953 | { | |
1954 | case TLS_MODEL_GLOBAL_DYNAMIC: | |
1955 | insns = xtensa_call_tls_desc (x, &ret); | |
1956 | emit_libcall_block (insns, dest, ret, x); | |
1957 | break; | |
1958 | ||
1959 | case TLS_MODEL_LOCAL_DYNAMIC: | |
1960 | base = gen_reg_rtx (Pmode); | |
1961 | modbase = xtensa_tls_module_base (); | |
1962 | insns = xtensa_call_tls_desc (modbase, &ret); | |
1963 | emit_libcall_block (insns, base, ret, modbase); | |
1964 | addend = force_reg (SImode, gen_sym_DTPOFF (x)); | |
1965 | emit_insn (gen_addsi3 (dest, base, addend)); | |
1966 | break; | |
1967 | ||
1968 | case TLS_MODEL_INITIAL_EXEC: | |
1969 | case TLS_MODEL_LOCAL_EXEC: | |
1970 | tp = gen_reg_rtx (SImode); | |
f959607b | 1971 | emit_insn (gen_get_thread_pointersi (tp)); |
6a7a462c BW |
1972 | addend = force_reg (SImode, gen_sym_TPOFF (x)); |
1973 | emit_insn (gen_addsi3 (dest, tp, addend)); | |
1974 | break; | |
1975 | ||
1976 | default: | |
1977 | gcc_unreachable (); | |
1978 | } | |
1979 | ||
1980 | return dest; | |
1981 | } | |
1982 | ||
1983 | ||
da1f39e4 BW |
1984 | rtx |
1985 | xtensa_legitimize_address (rtx x, | |
1986 | rtx oldx ATTRIBUTE_UNUSED, | |
ef4bddc2 | 1987 | machine_mode mode) |
da1f39e4 | 1988 | { |
6a7a462c BW |
1989 | if (xtensa_tls_symbol_p (x)) |
1990 | return xtensa_legitimize_tls_address (x); | |
1991 | ||
da1f39e4 BW |
1992 | if (GET_CODE (x) == PLUS) |
1993 | { | |
1994 | rtx plus0 = XEXP (x, 0); | |
1995 | rtx plus1 = XEXP (x, 1); | |
1996 | ||
1997 | if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) | |
1998 | { | |
1999 | plus0 = XEXP (x, 1); | |
2000 | plus1 = XEXP (x, 0); | |
2001 | } | |
2002 | ||
2003 | /* Try to split up the offset to use an ADDMI instruction. */ | |
2004 | if (GET_CODE (plus0) == REG | |
2005 | && GET_CODE (plus1) == CONST_INT | |
2006 | && !xtensa_mem_offset (INTVAL (plus1), mode) | |
2007 | && !xtensa_simm8 (INTVAL (plus1)) | |
2008 | && xtensa_mem_offset (INTVAL (plus1) & 0xff, mode) | |
2009 | && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) | |
2010 | { | |
2011 | rtx temp = gen_reg_rtx (Pmode); | |
2012 | rtx addmi_offset = GEN_INT (INTVAL (plus1) & ~0xff); | |
f7df4a84 RS |
2013 | emit_insn (gen_rtx_SET (temp, gen_rtx_PLUS (Pmode, plus0, |
2014 | addmi_offset))); | |
da1f39e4 BW |
2015 | return gen_rtx_PLUS (Pmode, temp, GEN_INT (INTVAL (plus1) & 0xff)); |
2016 | } | |
2017 | } | |
2018 | ||
506d7b68 | 2019 | return x; |
da1f39e4 BW |
2020 | } |
2021 | ||
a1a79768 AS |
2022 | /* Worker function for TARGET_MODE_DEPENDENT_ADDRESS_P. |
2023 | ||
2024 | Treat constant-pool references as "mode dependent" since they can | |
2025 | only be accessed with SImode loads. This works around a bug in the | |
2026 | combiner where a constant pool reference is temporarily converted | |
2027 | to an HImode load, which is then assumed to zero-extend based on | |
2028 | our definition of LOAD_EXTEND_OP. This is wrong because the high | |
2029 | bits of a 16-bit value in the constant pool are now sign-extended | |
2030 | by default. */ | |
2031 | ||
2032 | static bool | |
5bfed9a9 GJL |
2033 | xtensa_mode_dependent_address_p (const_rtx addr, |
2034 | addr_space_t as ATTRIBUTE_UNUSED) | |
a1a79768 AS |
2035 | { |
2036 | return constantpool_address_p (addr); | |
2037 | } | |
da1f39e4 | 2038 | |
6a7a462c BW |
2039 | /* Return TRUE if X contains any TLS symbol references. */ |
2040 | ||
2041 | bool | |
2042 | xtensa_tls_referenced_p (rtx x) | |
2043 | { | |
e46dad5d | 2044 | if (! targetm.have_tls) |
6a7a462c BW |
2045 | return false; |
2046 | ||
2f36a994 RS |
2047 | subrtx_iterator::array_type array; |
2048 | FOR_EACH_SUBRTX (iter, array, x, ALL) | |
2049 | { | |
2050 | const_rtx x = *iter; | |
2051 | if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0) | |
2052 | return true; | |
2053 | ||
2054 | /* Ignore TLS references that have already been legitimized. */ | |
2055 | if (GET_CODE (x) == UNSPEC) | |
2056 | switch (XINT (x, 1)) | |
2057 | { | |
2058 | case UNSPEC_TPOFF: | |
2059 | case UNSPEC_DTPOFF: | |
2060 | case UNSPEC_TLS_FUNC: | |
2061 | case UNSPEC_TLS_ARG: | |
2062 | case UNSPEC_TLS_CALL: | |
2063 | iter.skip_subrtxes (); | |
2064 | break; | |
2065 | default: | |
2066 | break; | |
2067 | } | |
2068 | } | |
2069 | return false; | |
6a7a462c BW |
2070 | } |
2071 | ||
2072 | ||
fbbf66e7 RS |
2073 | /* Implement TARGET_CANNOT_FORCE_CONST_MEM. */ |
2074 | ||
2075 | static bool | |
ef4bddc2 | 2076 | xtensa_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
fbbf66e7 RS |
2077 | { |
2078 | return xtensa_tls_referenced_p (x); | |
2079 | } | |
2080 | ||
2081 | ||
b0c6e48f | 2082 | /* Return the debugger register number to use for 'regno'. */ |
03984308 BW |
2083 | |
2084 | int | |
ffbc8796 | 2085 | xtensa_dbx_register_number (int regno) |
03984308 BW |
2086 | { |
2087 | int first = -1; | |
633e4eb4 BW |
2088 | |
2089 | if (GP_REG_P (regno)) | |
2090 | { | |
2091 | regno -= GP_REG_FIRST; | |
2092 | first = 0; | |
2093 | } | |
2094 | else if (BR_REG_P (regno)) | |
2095 | { | |
2096 | regno -= BR_REG_FIRST; | |
2097 | first = 16; | |
2098 | } | |
2099 | else if (FP_REG_P (regno)) | |
2100 | { | |
2101 | regno -= FP_REG_FIRST; | |
b0c6e48f | 2102 | first = 48; |
633e4eb4 | 2103 | } |
03984308 BW |
2104 | else if (ACC_REG_P (regno)) |
2105 | { | |
b0c6e48f BW |
2106 | first = 0x200; /* Start of Xtensa special registers. */ |
2107 | regno = 16; /* ACCLO is special register 16. */ | |
03984308 BW |
2108 | } |
2109 | ||
2110 | /* When optimizing, we sometimes get asked about pseudo-registers | |
638db43e | 2111 | that don't represent hard registers. Return 0 for these. */ |
03984308 BW |
2112 | if (first == -1) |
2113 | return 0; | |
2114 | ||
2115 | return first + regno; | |
2116 | } | |
2117 | ||
2118 | ||
2119 | /* Argument support functions. */ | |
2120 | ||
2121 | /* Initialize CUMULATIVE_ARGS for a function. */ | |
2122 | ||
2123 | void | |
997b8b4d | 2124 | init_cumulative_args (CUMULATIVE_ARGS *cum, int incoming) |
03984308 BW |
2125 | { |
2126 | cum->arg_words = 0; | |
997b8b4d | 2127 | cum->incoming = incoming; |
03984308 BW |
2128 | } |
2129 | ||
ffbc8796 | 2130 | |
03984308 BW |
2131 | /* Advance the argument to the next argument position. */ |
2132 | ||
626a4b31 | 2133 | static void |
6930c98c RS |
2134 | xtensa_function_arg_advance (cumulative_args_t cum, |
2135 | const function_arg_info &arg) | |
03984308 BW |
2136 | { |
2137 | int words, max; | |
2138 | int *arg_words; | |
2139 | ||
d5cc9181 | 2140 | arg_words = &get_cumulative_args (cum)->arg_words; |
03984308 BW |
2141 | max = MAX_ARGS_IN_REGISTERS; |
2142 | ||
6930c98c RS |
2143 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2144 | / UNITS_PER_WORD); | |
03984308 | 2145 | |
85d91d5b | 2146 | if (*arg_words < max |
0ffef200 | 2147 | && (targetm.calls.must_pass_in_stack (arg) |
85d91d5b | 2148 | || *arg_words + words > max)) |
03984308 BW |
2149 | *arg_words = max; |
2150 | ||
2151 | *arg_words += words; | |
2152 | } | |
2153 | ||
2154 | ||
6783fdb7 | 2155 | /* Return an RTL expression containing the register for the given argument, |
368ebcd6 | 2156 | or 0 if the argument is to be passed on the stack. INCOMING_P is nonzero |
ffbc8796 | 2157 | if this is an incoming argument to the current function. */ |
03984308 | 2158 | |
626a4b31 | 2159 | static rtx |
6783fdb7 RS |
2160 | xtensa_function_arg_1 (cumulative_args_t cum_v, const function_arg_info &arg, |
2161 | bool incoming_p) | |
03984308 | 2162 | { |
d5cc9181 | 2163 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); |
03984308 BW |
2164 | int regbase, words, max; |
2165 | int *arg_words; | |
2166 | int regno; | |
03984308 BW |
2167 | |
2168 | arg_words = &cum->arg_words; | |
2169 | regbase = (incoming_p ? GP_ARG_FIRST : GP_OUTGOING_ARG_FIRST); | |
2170 | max = MAX_ARGS_IN_REGISTERS; | |
2171 | ||
6783fdb7 RS |
2172 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2173 | / UNITS_PER_WORD); | |
03984308 | 2174 | |
6783fdb7 | 2175 | if (arg.type && (TYPE_ALIGN (arg.type) > BITS_PER_WORD)) |
822e895c | 2176 | { |
6783fdb7 | 2177 | int align = MIN (TYPE_ALIGN (arg.type), STACK_BOUNDARY) / BITS_PER_WORD; |
822e895c BW |
2178 | *arg_words = (*arg_words + align - 1) & -align; |
2179 | } | |
03984308 BW |
2180 | |
2181 | if (*arg_words + words > max) | |
2182 | return (rtx)0; | |
2183 | ||
2184 | regno = regbase + *arg_words; | |
03984308 | 2185 | |
997b8b4d | 2186 | if (cum->incoming && regno <= A7_REG && regno + words > A7_REG) |
590e2636 | 2187 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
03984308 | 2188 | |
6783fdb7 | 2189 | return gen_rtx_REG (arg.mode, regno); |
03984308 BW |
2190 | } |
2191 | ||
626a4b31 NF |
2192 | /* Implement TARGET_FUNCTION_ARG. */ |
2193 | ||
2194 | static rtx | |
6783fdb7 | 2195 | xtensa_function_arg (cumulative_args_t cum, const function_arg_info &arg) |
626a4b31 | 2196 | { |
6783fdb7 | 2197 | return xtensa_function_arg_1 (cum, arg, false); |
626a4b31 NF |
2198 | } |
2199 | ||
2200 | /* Implement TARGET_FUNCTION_INCOMING_ARG. */ | |
2201 | ||
2202 | static rtx | |
6783fdb7 RS |
2203 | xtensa_function_incoming_arg (cumulative_args_t cum, |
2204 | const function_arg_info &arg) | |
626a4b31 | 2205 | { |
6783fdb7 | 2206 | return xtensa_function_arg_1 (cum, arg, true); |
626a4b31 | 2207 | } |
03984308 | 2208 | |
c2ed6cf8 | 2209 | static unsigned int |
ef4bddc2 | 2210 | xtensa_function_arg_boundary (machine_mode mode, const_tree type) |
d2348985 BW |
2211 | { |
2212 | unsigned int alignment; | |
2213 | ||
2214 | alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode); | |
2215 | if (alignment < PARM_BOUNDARY) | |
2216 | alignment = PARM_BOUNDARY; | |
2217 | if (alignment > STACK_BOUNDARY) | |
2218 | alignment = STACK_BOUNDARY; | |
2219 | return alignment; | |
2220 | } | |
2221 | ||
2222 | ||
6e5ff6e7 | 2223 | static bool |
586de218 | 2224 | xtensa_return_in_msb (const_tree valtype) |
6e5ff6e7 BW |
2225 | { |
2226 | return (TARGET_BIG_ENDIAN | |
2227 | && AGGREGATE_TYPE_P (valtype) | |
2228 | && int_size_in_bytes (valtype) >= UNITS_PER_WORD); | |
2229 | } | |
2230 | ||
2231 | ||
c5387660 JM |
2232 | static void |
2233 | xtensa_option_override (void) | |
03984308 BW |
2234 | { |
2235 | int regno; | |
ef4bddc2 | 2236 | machine_mode mode; |
03984308 | 2237 | |
8c8eb949 MF |
2238 | if (xtensa_windowed_abi == -1) |
2239 | xtensa_windowed_abi = TARGET_WINDOWED_ABI_DEFAULT; | |
2240 | ||
e46dad5d MF |
2241 | if (! TARGET_THREADPTR) |
2242 | targetm.have_tls = false; | |
2243 | ||
1a711a0b MF |
2244 | /* Use CONST16 in the absence of L32R. |
2245 | Set it in the TARGET_OPTION_OVERRIDE to avoid dependency on xtensa | |
2246 | configuration in the xtensa-common.c */ | |
2247 | ||
2248 | if (!TARGET_L32R) | |
2249 | target_flags |= MASK_CONST16; | |
2250 | ||
03984308 BW |
2251 | if (!TARGET_BOOLEANS && TARGET_HARD_FLOAT) |
2252 | error ("boolean registers required for the floating-point option"); | |
2253 | ||
638db43e | 2254 | /* Set up array giving whether a given register can hold a given mode. */ |
03984308 BW |
2255 | for (mode = VOIDmode; |
2256 | mode != MAX_MACHINE_MODE; | |
ef4bddc2 | 2257 | mode = (machine_mode) ((int) mode + 1)) |
03984308 BW |
2258 | { |
2259 | int size = GET_MODE_SIZE (mode); | |
0a2aaacc | 2260 | enum mode_class mclass = GET_MODE_CLASS (mode); |
03984308 BW |
2261 | |
2262 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2263 | { | |
2264 | int temp; | |
2265 | ||
2266 | if (ACC_REG_P (regno)) | |
f42f5a1b | 2267 | temp = (TARGET_MAC16 |
0a2aaacc | 2268 | && (mclass == MODE_INT) && (size <= UNITS_PER_WORD)); |
03984308 BW |
2269 | else if (GP_REG_P (regno)) |
2270 | temp = ((regno & 1) == 0 || (size <= UNITS_PER_WORD)); | |
2271 | else if (FP_REG_P (regno)) | |
2272 | temp = (TARGET_HARD_FLOAT && (mode == SFmode)); | |
2273 | else if (BR_REG_P (regno)) | |
2274 | temp = (TARGET_BOOLEANS && (mode == CCmode)); | |
2275 | else | |
2276 | temp = FALSE; | |
2277 | ||
f939c3e6 | 2278 | xtensa_hard_regno_mode_ok_p[(int) mode][regno] = temp; |
03984308 BW |
2279 | } |
2280 | } | |
2281 | ||
2282 | init_machine_status = xtensa_init_machine_status; | |
03984308 | 2283 | |
f42f5a1b BW |
2284 | /* Check PIC settings. PIC is only supported when using L32R |
2285 | instructions, and some targets need to always use PIC. */ | |
2286 | if (flag_pic && TARGET_CONST16) | |
a3f9f006 | 2287 | error ("%<-f%s%> is not supported with CONST16 instructions", |
f42f5a1b | 2288 | (flag_pic > 1 ? "PIC" : "pic")); |
1b408ba1 SA |
2289 | else if (TARGET_FORCE_NO_PIC) |
2290 | flag_pic = 0; | |
f42f5a1b BW |
2291 | else if (XTENSA_ALWAYS_PIC) |
2292 | { | |
2293 | if (TARGET_CONST16) | |
2294 | error ("PIC is required but not supported with CONST16 instructions"); | |
2295 | flag_pic = 1; | |
2296 | } | |
2297 | /* There's no need for -fPIC (as opposed to -fpic) on Xtensa. */ | |
2298 | if (flag_pic > 1) | |
03984308 | 2299 | flag_pic = 1; |
166b25dc BW |
2300 | if (flag_pic && !flag_pie) |
2301 | flag_shlib = 1; | |
87c8b4be CT |
2302 | |
2303 | /* Hot/cold partitioning does not work on this architecture, because of | |
2304 | constant pools (the load instruction cannot necessarily reach that far). | |
2305 | Therefore disable it on this architecture. */ | |
2306 | if (flag_reorder_blocks_and_partition) | |
2307 | { | |
2308 | flag_reorder_blocks_and_partition = 0; | |
2309 | flag_reorder_blocks = 1; | |
2310 | } | |
03984308 BW |
2311 | } |
2312 | ||
c43f4279 RS |
2313 | /* Implement TARGET_HARD_REGNO_NREGS. */ |
2314 | ||
2315 | static unsigned int | |
2316 | xtensa_hard_regno_nregs (unsigned int regno, machine_mode mode) | |
2317 | { | |
2318 | if (FP_REG_P (regno)) | |
2319 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_FPREG); | |
2320 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD); | |
2321 | } | |
2322 | ||
f939c3e6 RS |
2323 | /* Implement TARGET_HARD_REGNO_MODE_OK. */ |
2324 | ||
2325 | static bool | |
2326 | xtensa_hard_regno_mode_ok (unsigned int regno, machine_mode mode) | |
2327 | { | |
2328 | return xtensa_hard_regno_mode_ok_p[mode][regno]; | |
2329 | } | |
2330 | ||
99e1629f RS |
2331 | /* Implement TARGET_MODES_TIEABLE_P. */ |
2332 | ||
2333 | static bool | |
2334 | xtensa_modes_tieable_p (machine_mode mode1, machine_mode mode2) | |
2335 | { | |
2336 | return ((GET_MODE_CLASS (mode1) == MODE_FLOAT | |
2337 | || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) | |
2338 | == (GET_MODE_CLASS (mode2) == MODE_FLOAT | |
2339 | || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); | |
2340 | } | |
2341 | ||
03984308 BW |
2342 | /* A C compound statement to output to stdio stream STREAM the |
2343 | assembler syntax for an instruction operand X. X is an RTL | |
2344 | expression. | |
2345 | ||
2346 | CODE is a value that can be used to specify one of several ways | |
2347 | of printing the operand. It is used when identical operands | |
2348 | must be printed differently depending on the context. CODE | |
2349 | comes from the '%' specification that was used to request | |
2350 | printing of the operand. If the specification was just '%DIGIT' | |
2351 | then CODE is 0; if the specification was '%LTR DIGIT' then CODE | |
2352 | is the ASCII code for LTR. | |
2353 | ||
2354 | If X is a register, this macro should print the register's name. | |
2355 | The names can be found in an array 'reg_names' whose type is | |
2356 | 'char *[]'. 'reg_names' is initialized from 'REGISTER_NAMES'. | |
2357 | ||
2358 | When the machine description has a specification '%PUNCT' (a '%' | |
2359 | followed by a punctuation character), this macro is called with | |
2360 | a null pointer for X and the punctuation character for CODE. | |
2361 | ||
2362 | 'a', 'c', 'l', and 'n' are reserved. | |
633e4eb4 | 2363 | |
03984308 BW |
2364 | The Xtensa specific codes are: |
2365 | ||
2366 | 'd' CONST_INT, print as signed decimal | |
2367 | 'x' CONST_INT, print as signed hexadecimal | |
2368 | 'K' CONST_INT, print number of bits in mask for EXTUI | |
2369 | 'R' CONST_INT, print (X & 0x1f) | |
2370 | 'L' CONST_INT, print ((32 - X) & 0x1f) | |
2371 | 'D' REG, print second register of double-word register operand | |
2372 | 'N' MEM, print address of next word following a memory operand | |
2373 | 'v' MEM, if memory reference is volatile, output a MEMW before it | |
f42f5a1b BW |
2374 | 't' any constant, add "@h" suffix for top 16 bits |
2375 | 'b' any constant, add "@l" suffix for bottom 16 bits | |
03984308 BW |
2376 | */ |
2377 | ||
2378 | static void | |
ffbc8796 | 2379 | printx (FILE *file, signed int val) |
03984308 | 2380 | { |
ffbc8796 | 2381 | /* Print a hexadecimal value in a nice way. */ |
03984308 BW |
2382 | if ((val > -0xa) && (val < 0xa)) |
2383 | fprintf (file, "%d", val); | |
2384 | else if (val < 0) | |
2385 | fprintf (file, "-0x%x", -val); | |
2386 | else | |
2387 | fprintf (file, "0x%x", val); | |
2388 | } | |
2389 | ||
2390 | ||
2391 | void | |
ffbc8796 | 2392 | print_operand (FILE *file, rtx x, int letter) |
03984308 | 2393 | { |
f42f5a1b | 2394 | if (!x) |
03984308 BW |
2395 | error ("PRINT_OPERAND null pointer"); |
2396 | ||
f42f5a1b | 2397 | switch (letter) |
03984308 | 2398 | { |
f42f5a1b BW |
2399 | case 'D': |
2400 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) | |
2401 | fprintf (file, "%s", reg_names[xt_true_regnum (x) + 1]); | |
2402 | else | |
2403 | output_operand_lossage ("invalid %%D value"); | |
2404 | break; | |
03984308 | 2405 | |
f42f5a1b BW |
2406 | case 'v': |
2407 | if (GET_CODE (x) == MEM) | |
2408 | { | |
2409 | /* For a volatile memory reference, emit a MEMW before the | |
2410 | load or store. */ | |
66e58b33 | 2411 | if (MEM_VOLATILE_P (x) && TARGET_SERIALIZE_VOLATILE) |
f42f5a1b BW |
2412 | fprintf (file, "memw\n\t"); |
2413 | } | |
2414 | else | |
2415 | output_operand_lossage ("invalid %%v value"); | |
2416 | break; | |
03984308 | 2417 | |
f42f5a1b BW |
2418 | case 'N': |
2419 | if (GET_CODE (x) == MEM | |
2420 | && (GET_MODE (x) == DFmode || GET_MODE (x) == DImode)) | |
2421 | { | |
0d4a1197 RS |
2422 | x = adjust_address (x, GET_MODE (x) == DFmode ? E_SFmode : E_SImode, |
2423 | 4); | |
cc8ca59e | 2424 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b BW |
2425 | } |
2426 | else | |
2427 | output_operand_lossage ("invalid %%N value"); | |
2428 | break; | |
03984308 | 2429 | |
f42f5a1b BW |
2430 | case 'K': |
2431 | if (GET_CODE (x) == CONST_INT) | |
03984308 | 2432 | { |
f42f5a1b BW |
2433 | int num_bits = 0; |
2434 | unsigned val = INTVAL (x); | |
2435 | while (val & 1) | |
2436 | { | |
2437 | num_bits += 1; | |
2438 | val = val >> 1; | |
2439 | } | |
2440 | if ((val != 0) || (num_bits == 0) || (num_bits > 16)) | |
2441 | fatal_insn ("invalid mask", x); | |
03984308 | 2442 | |
f42f5a1b BW |
2443 | fprintf (file, "%d", num_bits); |
2444 | } | |
2445 | else | |
2446 | output_operand_lossage ("invalid %%K value"); | |
2447 | break; | |
03984308 | 2448 | |
f42f5a1b BW |
2449 | case 'L': |
2450 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2451 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, (32 - INTVAL (x)) & 0x1f); |
f42f5a1b BW |
2452 | else |
2453 | output_operand_lossage ("invalid %%L value"); | |
2454 | break; | |
03984308 | 2455 | |
f42f5a1b BW |
2456 | case 'R': |
2457 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2458 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) & 0x1f); |
f42f5a1b BW |
2459 | else |
2460 | output_operand_lossage ("invalid %%R value"); | |
2461 | break; | |
03984308 | 2462 | |
f42f5a1b BW |
2463 | case 'x': |
2464 | if (GET_CODE (x) == CONST_INT) | |
2465 | printx (file, INTVAL (x)); | |
2466 | else | |
2467 | output_operand_lossage ("invalid %%x value"); | |
2468 | break; | |
03984308 | 2469 | |
f42f5a1b BW |
2470 | case 'd': |
2471 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2472 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2473 | else |
2474 | output_operand_lossage ("invalid %%d value"); | |
2475 | break; | |
03984308 | 2476 | |
f42f5a1b BW |
2477 | case 't': |
2478 | case 'b': | |
2479 | if (GET_CODE (x) == CONST_INT) | |
2480 | { | |
2481 | printx (file, INTVAL (x)); | |
2482 | fputs (letter == 't' ? "@h" : "@l", file); | |
2483 | } | |
2484 | else if (GET_CODE (x) == CONST_DOUBLE) | |
2485 | { | |
f42f5a1b BW |
2486 | if (GET_MODE (x) == SFmode) |
2487 | { | |
2488 | long l; | |
34a72c33 | 2489 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
f42f5a1b BW |
2490 | fprintf (file, "0x%08lx@%c", l, letter == 't' ? 'h' : 'l'); |
2491 | } | |
2492 | else | |
2493 | output_operand_lossage ("invalid %%t/%%b value"); | |
2494 | } | |
2495 | else if (GET_CODE (x) == CONST) | |
2496 | { | |
2497 | /* X must be a symbolic constant on ELF. Write an expression | |
2498 | suitable for 'const16' that sets the high or low 16 bits. */ | |
2499 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
2500 | || (GET_CODE (XEXP (XEXP (x, 0), 0)) != SYMBOL_REF | |
2501 | && GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
2502 | || GET_CODE (XEXP (XEXP (x, 0), 1)) != CONST_INT) | |
2503 | output_operand_lossage ("invalid %%t/%%b value"); | |
2504 | print_operand (file, XEXP (XEXP (x, 0), 0), 0); | |
2505 | fputs (letter == 't' ? "@h" : "@l", file); | |
2506 | /* There must be a non-alphanumeric character between 'h' or 'l' | |
2507 | and the number. The '-' is added by print_operand() already. */ | |
2508 | if (INTVAL (XEXP (XEXP (x, 0), 1)) >= 0) | |
2509 | fputs ("+", file); | |
2510 | print_operand (file, XEXP (XEXP (x, 0), 1), 0); | |
2511 | } | |
2512 | else | |
633e4eb4 | 2513 | { |
f42f5a1b BW |
2514 | output_addr_const (file, x); |
2515 | fputs (letter == 't' ? "@h" : "@l", file); | |
03984308 BW |
2516 | } |
2517 | break; | |
2518 | ||
a024f514 MF |
2519 | case 'y': |
2520 | if (GET_CODE (x) == CONST_DOUBLE && | |
2521 | GET_MODE (x) == SFmode) | |
2522 | { | |
a024f514 | 2523 | long l; |
34a72c33 | 2524 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
a024f514 MF |
2525 | fprintf (file, "0x%08lx", l); |
2526 | break; | |
2527 | } | |
2528 | ||
2529 | /* fall through */ | |
2530 | ||
03984308 | 2531 | default: |
f42f5a1b BW |
2532 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) |
2533 | fprintf (file, "%s", reg_names[xt_true_regnum (x)]); | |
2534 | else if (GET_CODE (x) == MEM) | |
cc8ca59e | 2535 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b | 2536 | else if (GET_CODE (x) == CONST_INT) |
3904010d | 2537 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2538 | else |
2539 | output_addr_const (file, x); | |
03984308 BW |
2540 | } |
2541 | } | |
2542 | ||
2543 | ||
2544 | /* A C compound statement to output to stdio stream STREAM the | |
2545 | assembler syntax for an instruction operand that is a memory | |
fb49053f | 2546 | reference whose address is ADDR. ADDR is an RTL expression. */ |
03984308 BW |
2547 | |
2548 | void | |
ffbc8796 | 2549 | print_operand_address (FILE *file, rtx addr) |
03984308 BW |
2550 | { |
2551 | if (!addr) | |
2552 | error ("PRINT_OPERAND_ADDRESS, null pointer"); | |
2553 | ||
2554 | switch (GET_CODE (addr)) | |
2555 | { | |
2556 | default: | |
2557 | fatal_insn ("invalid address", addr); | |
2558 | break; | |
2559 | ||
2560 | case REG: | |
2561 | fprintf (file, "%s, 0", reg_names [REGNO (addr)]); | |
2562 | break; | |
2563 | ||
2564 | case PLUS: | |
2565 | { | |
2566 | rtx reg = (rtx)0; | |
2567 | rtx offset = (rtx)0; | |
2568 | rtx arg0 = XEXP (addr, 0); | |
2569 | rtx arg1 = XEXP (addr, 1); | |
2570 | ||
2571 | if (GET_CODE (arg0) == REG) | |
2572 | { | |
2573 | reg = arg0; | |
2574 | offset = arg1; | |
2575 | } | |
2576 | else if (GET_CODE (arg1) == REG) | |
2577 | { | |
2578 | reg = arg1; | |
2579 | offset = arg0; | |
2580 | } | |
2581 | else | |
2582 | fatal_insn ("no register in address", addr); | |
2583 | ||
2584 | if (CONSTANT_P (offset)) | |
2585 | { | |
2586 | fprintf (file, "%s, ", reg_names [REGNO (reg)]); | |
2587 | output_addr_const (file, offset); | |
2588 | } | |
2589 | else | |
2590 | fatal_insn ("address offset not a constant", addr); | |
2591 | } | |
2592 | break; | |
2593 | ||
2594 | case LABEL_REF: | |
2595 | case SYMBOL_REF: | |
2596 | case CONST_INT: | |
2597 | case CONST: | |
2598 | output_addr_const (file, addr); | |
2599 | break; | |
2600 | } | |
2601 | } | |
2602 | ||
2ac6bb04 | 2603 | /* Implement TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ |
03984308 | 2604 | |
2ac6bb04 | 2605 | static bool |
da1f39e4 BW |
2606 | xtensa_output_addr_const_extra (FILE *fp, rtx x) |
2607 | { | |
2608 | if (GET_CODE (x) == UNSPEC && XVECLEN (x, 0) == 1) | |
2609 | { | |
2610 | switch (XINT (x, 1)) | |
2611 | { | |
6a7a462c BW |
2612 | case UNSPEC_TPOFF: |
2613 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2614 | fputs ("@TPOFF", fp); | |
2615 | return true; | |
2616 | case UNSPEC_DTPOFF: | |
2617 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2618 | fputs ("@DTPOFF", fp); | |
2619 | return true; | |
da1f39e4 BW |
2620 | case UNSPEC_PLT: |
2621 | if (flag_pic) | |
2622 | { | |
2623 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2624 | fputs ("@PLT", fp); | |
2625 | return true; | |
2626 | } | |
2627 | break; | |
2628 | default: | |
2629 | break; | |
2630 | } | |
2631 | } | |
2632 | return false; | |
2633 | } | |
2634 | ||
9ae4ef4c MF |
2635 | static void |
2636 | xtensa_output_integer_literal_parts (FILE *file, rtx x, int size) | |
2637 | { | |
2638 | if (size > 4 && !(size & (size - 1))) | |
2639 | { | |
2640 | rtx first, second; | |
2641 | ||
2642 | split_double (x, &first, &second); | |
2643 | xtensa_output_integer_literal_parts (file, first, size / 2); | |
2644 | fputs (", ", file); | |
2645 | xtensa_output_integer_literal_parts (file, second, size / 2); | |
2646 | } | |
2647 | else if (size == 4) | |
2648 | { | |
2649 | output_addr_const (file, x); | |
2650 | } | |
2651 | else | |
2652 | { | |
2653 | gcc_unreachable(); | |
2654 | } | |
2655 | } | |
da1f39e4 | 2656 | |
03984308 | 2657 | void |
ef4bddc2 | 2658 | xtensa_output_literal (FILE *file, rtx x, machine_mode mode, int labelno) |
03984308 BW |
2659 | { |
2660 | long value_long[2]; | |
03984308 BW |
2661 | |
2662 | fprintf (file, "\t.literal .LC%u, ", (unsigned) labelno); | |
2663 | ||
2664 | switch (GET_MODE_CLASS (mode)) | |
2665 | { | |
2666 | case MODE_FLOAT: | |
177b6be0 | 2667 | gcc_assert (GET_CODE (x) == CONST_DOUBLE); |
03984308 | 2668 | |
03984308 BW |
2669 | switch (mode) |
2670 | { | |
4e10a5a7 | 2671 | case E_SFmode: |
34a72c33 RS |
2672 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), |
2673 | value_long[0]); | |
4575a800 BW |
2674 | if (HOST_BITS_PER_LONG > 32) |
2675 | value_long[0] &= 0xffffffff; | |
b216cd4a | 2676 | fprintf (file, "0x%08lx\n", value_long[0]); |
03984308 BW |
2677 | break; |
2678 | ||
4e10a5a7 | 2679 | case E_DFmode: |
34a72c33 RS |
2680 | REAL_VALUE_TO_TARGET_DOUBLE (*CONST_DOUBLE_REAL_VALUE (x), |
2681 | value_long); | |
4575a800 BW |
2682 | if (HOST_BITS_PER_LONG > 32) |
2683 | { | |
2684 | value_long[0] &= 0xffffffff; | |
2685 | value_long[1] &= 0xffffffff; | |
2686 | } | |
b216cd4a ZW |
2687 | fprintf (file, "0x%08lx, 0x%08lx\n", |
2688 | value_long[0], value_long[1]); | |
03984308 BW |
2689 | break; |
2690 | ||
2691 | default: | |
177b6be0 | 2692 | gcc_unreachable (); |
03984308 BW |
2693 | } |
2694 | ||
2695 | break; | |
2696 | ||
2697 | case MODE_INT: | |
2698 | case MODE_PARTIAL_INT: | |
9ae4ef4c MF |
2699 | xtensa_output_integer_literal_parts (file, x, GET_MODE_SIZE (mode)); |
2700 | fputs ("\n", file); | |
03984308 BW |
2701 | break; |
2702 | ||
2703 | default: | |
177b6be0 | 2704 | gcc_unreachable (); |
03984308 BW |
2705 | } |
2706 | } | |
2707 | ||
590e2636 MF |
2708 | static bool |
2709 | xtensa_call_save_reg(int regno) | |
2710 | { | |
2711 | if (TARGET_WINDOWED_ABI) | |
2712 | return false; | |
2713 | ||
2714 | if (regno == A0_REG) | |
2715 | return crtl->profile || !crtl->is_leaf || crtl->calls_eh_return || | |
2716 | df_regs_ever_live_p (regno); | |
2717 | ||
2718 | if (crtl->calls_eh_return && regno >= 2 && regno < 4) | |
2719 | return true; | |
2720 | ||
2e3d041b | 2721 | return !call_used_or_fixed_reg_p (regno) && df_regs_ever_live_p (regno); |
590e2636 | 2722 | } |
03984308 BW |
2723 | |
2724 | /* Return the bytes needed to compute the frame pointer from the current | |
638db43e | 2725 | stack pointer. */ |
03984308 BW |
2726 | |
2727 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
2728 | #define XTENSA_STACK_ALIGN(LOC) (((LOC) + STACK_BYTES-1) & ~(STACK_BYTES-1)) | |
2729 | ||
2730 | long | |
f075bd95 | 2731 | compute_frame_size (poly_int64 size) |
03984308 | 2732 | { |
590e2636 MF |
2733 | int regno; |
2734 | ||
ad89d820 MF |
2735 | if (reload_completed && cfun->machine->frame_laid_out) |
2736 | return cfun->machine->current_frame_size; | |
2737 | ||
ffbc8796 | 2738 | /* Add space for the incoming static chain value. */ |
6de9cd9a | 2739 | if (cfun->static_chain_decl != NULL) |
03984308 BW |
2740 | size += (1 * UNITS_PER_WORD); |
2741 | ||
ad89d820 | 2742 | cfun->machine->callee_save_size = 0; |
590e2636 MF |
2743 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) |
2744 | { | |
2745 | if (xtensa_call_save_reg(regno)) | |
ad89d820 | 2746 | cfun->machine->callee_save_size += UNITS_PER_WORD; |
590e2636 MF |
2747 | } |
2748 | ||
ad89d820 | 2749 | cfun->machine->current_frame_size = |
03984308 | 2750 | XTENSA_STACK_ALIGN (size |
ad89d820 | 2751 | + cfun->machine->callee_save_size |
38173d38 | 2752 | + crtl->outgoing_args_size |
03984308 | 2753 | + (WINDOW_SIZE * UNITS_PER_WORD)); |
ad89d820 MF |
2754 | cfun->machine->callee_save_size = |
2755 | XTENSA_STACK_ALIGN (cfun->machine->callee_save_size); | |
2756 | cfun->machine->frame_laid_out = true; | |
2757 | return cfun->machine->current_frame_size; | |
03984308 BW |
2758 | } |
2759 | ||
2760 | ||
b52b1749 | 2761 | bool |
ffbc8796 | 2762 | xtensa_frame_pointer_required (void) |
03984308 BW |
2763 | { |
2764 | /* The code to expand builtin_frame_addr and builtin_return_addr | |
2765 | currently uses the hard_frame_pointer instead of frame_pointer. | |
2766 | This seems wrong but maybe it's necessary for other architectures. | |
638db43e | 2767 | This function is derived from the i386 code. */ |
03984308 | 2768 | |
25403c41 | 2769 | if (cfun->machine->accesses_prev_frame || cfun->has_nonlocal_label) |
b52b1749 | 2770 | return true; |
03984308 | 2771 | |
b52b1749 | 2772 | return false; |
03984308 BW |
2773 | } |
2774 | ||
5057f9e0 | 2775 | HOST_WIDE_INT |
eced9b48 | 2776 | xtensa_initial_elimination_offset (int from, int to ATTRIBUTE_UNUSED) |
5057f9e0 MF |
2777 | { |
2778 | long frame_size = compute_frame_size (get_frame_size ()); | |
2779 | HOST_WIDE_INT offset; | |
2780 | ||
2781 | switch (from) | |
2782 | { | |
2783 | case FRAME_POINTER_REGNUM: | |
2784 | if (FRAME_GROWS_DOWNWARD) | |
2785 | offset = frame_size - (WINDOW_SIZE * UNITS_PER_WORD) | |
2786 | - cfun->machine->callee_save_size; | |
2787 | else | |
2788 | offset = 0; | |
2789 | break; | |
2790 | case ARG_POINTER_REGNUM: | |
2791 | offset = frame_size; | |
2792 | break; | |
2793 | default: | |
2794 | gcc_unreachable (); | |
2795 | } | |
2796 | ||
2797 | return offset; | |
2798 | } | |
03984308 | 2799 | |
7f0ee694 BW |
2800 | /* minimum frame = reg save area (4 words) plus static chain (1 word) |
2801 | and the total number of words must be a multiple of 128 bits. */ | |
2802 | #define MIN_FRAME_SIZE (8 * UNITS_PER_WORD) | |
2803 | ||
f42f5a1b | 2804 | void |
ffbc8796 | 2805 | xtensa_expand_prologue (void) |
f42f5a1b BW |
2806 | { |
2807 | HOST_WIDE_INT total_size; | |
590e2636 | 2808 | rtx_insn *insn = NULL; |
240a513f | 2809 | rtx note_rtx; |
18dbd950 | 2810 | |
590e2636 | 2811 | |
f42f5a1b | 2812 | total_size = compute_frame_size (get_frame_size ()); |
18dbd950 | 2813 | |
7695d1e3 MF |
2814 | if (flag_stack_usage_info) |
2815 | current_function_static_stack_size = total_size; | |
2816 | ||
590e2636 MF |
2817 | if (TARGET_WINDOWED_ABI) |
2818 | { | |
2819 | if (total_size < (1 << (12+3))) | |
2820 | insn = emit_insn (gen_entry (GEN_INT (total_size))); | |
2821 | else | |
2822 | { | |
2823 | /* Use a8 as a temporary since a0-a7 may be live. */ | |
2824 | rtx tmp_reg = gen_rtx_REG (Pmode, A8_REG); | |
2825 | emit_insn (gen_entry (GEN_INT (MIN_FRAME_SIZE))); | |
2826 | emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE)); | |
2827 | emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg)); | |
2828 | insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg)); | |
2829 | } | |
2830 | } | |
03984308 BW |
2831 | else |
2832 | { | |
590e2636 MF |
2833 | int regno; |
2834 | HOST_WIDE_INT offset = 0; | |
ad89d820 | 2835 | int callee_save_size = cfun->machine->callee_save_size; |
590e2636 MF |
2836 | |
2837 | /* -128 is a limit of single addi instruction. */ | |
2838 | if (total_size > 0 && total_size <= 128) | |
2839 | { | |
2840 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
2841 | GEN_INT (-total_size))); | |
2842 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2843 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
2844 | plus_constant (Pmode, stack_pointer_rtx, |
2845 | -total_size)); | |
2846 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2847 | offset = total_size - UNITS_PER_WORD; | |
2848 | } | |
ad89d820 | 2849 | else if (callee_save_size) |
590e2636 MF |
2850 | { |
2851 | /* 1020 is maximal s32i offset, if the frame is bigger than that | |
2852 | * we move sp to the end of callee-saved save area, save and then | |
2853 | * move it to its final location. */ | |
2854 | if (total_size > 1024) | |
2855 | { | |
2856 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
ad89d820 | 2857 | GEN_INT (-callee_save_size))); |
590e2636 | 2858 | RTX_FRAME_RELATED_P (insn) = 1; |
f7df4a84 | 2859 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 2860 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 2861 | -callee_save_size)); |
590e2636 | 2862 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); |
ad89d820 | 2863 | offset = callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
2864 | } |
2865 | else | |
2866 | { | |
2867 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
2868 | emit_move_insn (tmp_reg, GEN_INT (total_size)); | |
2869 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, | |
2870 | stack_pointer_rtx, tmp_reg)); | |
2871 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2872 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
2873 | plus_constant (Pmode, stack_pointer_rtx, |
2874 | -total_size)); | |
2875 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2876 | offset = total_size - UNITS_PER_WORD; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
2881 | { | |
2882 | if (xtensa_call_save_reg(regno)) | |
2883 | { | |
2884 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
2885 | rtx mem = gen_frame_mem (SImode, x); | |
2886 | rtx reg = gen_rtx_REG (SImode, regno); | |
2887 | ||
2888 | offset -= UNITS_PER_WORD; | |
2889 | insn = emit_move_insn (mem, reg); | |
2890 | RTX_FRAME_RELATED_P (insn) = 1; | |
2891 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, | |
f7df4a84 | 2892 | gen_rtx_SET (mem, reg)); |
590e2636 MF |
2893 | } |
2894 | } | |
1fe39f19 MF |
2895 | if (total_size > 1024 |
2896 | || (!callee_save_size && total_size > 128)) | |
590e2636 MF |
2897 | { |
2898 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
2899 | emit_move_insn (tmp_reg, GEN_INT (total_size - | |
ad89d820 | 2900 | callee_save_size)); |
590e2636 MF |
2901 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, |
2902 | stack_pointer_rtx, tmp_reg)); | |
2903 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2904 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 2905 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 2906 | callee_save_size - |
590e2636 MF |
2907 | total_size)); |
2908 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2909 | } | |
03984308 BW |
2910 | } |
2911 | ||
f42f5a1b | 2912 | if (frame_pointer_needed) |
03984308 | 2913 | { |
997b8b4d | 2914 | if (cfun->machine->set_frame_ptr_insn) |
03984308 | 2915 | { |
240a513f | 2916 | rtx_insn *first; |
03984308 | 2917 | |
997b8b4d BW |
2918 | push_topmost_sequence (); |
2919 | first = get_insns (); | |
2920 | pop_topmost_sequence (); | |
03984308 | 2921 | |
f42f5a1b BW |
2922 | /* For all instructions prior to set_frame_ptr_insn, replace |
2923 | hard_frame_pointer references with stack_pointer. */ | |
2924 | for (insn = first; | |
997b8b4d | 2925 | insn != cfun->machine->set_frame_ptr_insn; |
f42f5a1b BW |
2926 | insn = NEXT_INSN (insn)) |
2927 | { | |
2928 | if (INSN_P (insn)) | |
20dca97b BW |
2929 | { |
2930 | PATTERN (insn) = replace_rtx (copy_rtx (PATTERN (insn)), | |
2931 | hard_frame_pointer_rtx, | |
2932 | stack_pointer_rtx); | |
2933 | df_insn_rescan (insn); | |
2934 | } | |
f42f5a1b BW |
2935 | } |
2936 | } | |
2937 | else | |
590e2636 MF |
2938 | { |
2939 | insn = emit_insn (gen_movsi (hard_frame_pointer_rtx, | |
2940 | stack_pointer_rtx)); | |
2941 | if (!TARGET_WINDOWED_ABI) | |
2942 | { | |
f7df4a84 | 2943 | note_rtx = gen_rtx_SET (hard_frame_pointer_rtx, |
590e2636 MF |
2944 | stack_pointer_rtx); |
2945 | RTX_FRAME_RELATED_P (insn) = 1; | |
2946 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2947 | } | |
2948 | } | |
2949 | } | |
03984308 | 2950 | |
590e2636 MF |
2951 | if (TARGET_WINDOWED_ABI) |
2952 | { | |
2953 | /* Create a note to describe the CFA. Because this is only used to set | |
2954 | DW_AT_frame_base for debug info, don't bother tracking changes through | |
2955 | each instruction in the prologue. It just takes up space. */ | |
f7df4a84 RS |
2956 | note_rtx = gen_rtx_SET ((frame_pointer_needed |
2957 | ? hard_frame_pointer_rtx | |
2958 | : stack_pointer_rtx), | |
590e2636 MF |
2959 | plus_constant (Pmode, stack_pointer_rtx, |
2960 | -total_size)); | |
2961 | RTX_FRAME_RELATED_P (insn) = 1; | |
2962 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2963 | } | |
2964 | } | |
03984308 BW |
2965 | |
2966 | void | |
590e2636 | 2967 | xtensa_expand_epilogue (void) |
03984308 | 2968 | { |
590e2636 MF |
2969 | if (!TARGET_WINDOWED_ABI) |
2970 | { | |
2971 | int regno; | |
2972 | HOST_WIDE_INT offset; | |
2973 | ||
ad89d820 | 2974 | if (cfun->machine->current_frame_size > (frame_pointer_needed ? 127 : 1024)) |
590e2636 MF |
2975 | { |
2976 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
2977 | emit_move_insn (tmp_reg, GEN_INT (cfun->machine->current_frame_size - |
2978 | cfun->machine->callee_save_size)); | |
590e2636 MF |
2979 | emit_insn (gen_addsi3 (stack_pointer_rtx, frame_pointer_needed ? |
2980 | hard_frame_pointer_rtx : stack_pointer_rtx, | |
2981 | tmp_reg)); | |
ad89d820 | 2982 | offset = cfun->machine->callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
2983 | } |
2984 | else | |
2985 | { | |
2986 | if (frame_pointer_needed) | |
2987 | emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx); | |
ad89d820 | 2988 | offset = cfun->machine->current_frame_size - UNITS_PER_WORD; |
590e2636 MF |
2989 | } |
2990 | ||
2991 | /* Prevent reordering of saved a0 update and loading it back from | |
2992 | the save area. */ | |
2993 | if (crtl->calls_eh_return) | |
2994 | emit_insn (gen_blockage ()); | |
2995 | ||
2996 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
2997 | { | |
2998 | if (xtensa_call_save_reg(regno)) | |
2999 | { | |
3000 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
3001 | ||
3002 | offset -= UNITS_PER_WORD; | |
3003 | emit_move_insn (gen_rtx_REG (SImode, regno), | |
3004 | gen_frame_mem (SImode, x)); | |
3005 | } | |
3006 | } | |
3007 | ||
ad89d820 | 3008 | if (cfun->machine->current_frame_size > 0) |
590e2636 MF |
3009 | { |
3010 | if (frame_pointer_needed || /* always reachable with addi */ | |
ad89d820 MF |
3011 | cfun->machine->current_frame_size > 1024 || |
3012 | cfun->machine->current_frame_size <= 127) | |
590e2636 | 3013 | { |
ad89d820 MF |
3014 | if (cfun->machine->current_frame_size <= 127) |
3015 | offset = cfun->machine->current_frame_size; | |
590e2636 | 3016 | else |
ad89d820 | 3017 | offset = cfun->machine->callee_save_size; |
590e2636 MF |
3018 | |
3019 | emit_insn (gen_addsi3 (stack_pointer_rtx, | |
3020 | stack_pointer_rtx, | |
3021 | GEN_INT (offset))); | |
3022 | } | |
3023 | else | |
3024 | { | |
3025 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
3026 | emit_move_insn (tmp_reg, |
3027 | GEN_INT (cfun->machine->current_frame_size)); | |
590e2636 MF |
3028 | emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, |
3029 | tmp_reg)); | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | if (crtl->calls_eh_return) | |
3034 | emit_insn (gen_add3_insn (stack_pointer_rtx, | |
3035 | stack_pointer_rtx, | |
3036 | EH_RETURN_STACKADJ_RTX)); | |
3037 | } | |
ad89d820 | 3038 | cfun->machine->epilogue_done = true; |
590e2636 | 3039 | emit_jump_insn (gen_return ()); |
03984308 BW |
3040 | } |
3041 | ||
ad89d820 MF |
3042 | bool |
3043 | xtensa_use_return_instruction_p (void) | |
3044 | { | |
3045 | if (!reload_completed) | |
3046 | return false; | |
3047 | if (TARGET_WINDOWED_ABI) | |
3048 | return true; | |
3049 | if (compute_frame_size (get_frame_size ()) == 0) | |
3050 | return true; | |
3051 | return cfun->machine->epilogue_done; | |
3052 | } | |
3053 | ||
590e2636 MF |
3054 | void |
3055 | xtensa_set_return_address (rtx address, rtx scratch) | |
3056 | { | |
3057 | HOST_WIDE_INT total_size = compute_frame_size (get_frame_size ()); | |
3058 | rtx frame = frame_pointer_needed ? | |
3059 | hard_frame_pointer_rtx : stack_pointer_rtx; | |
3060 | rtx a0_addr = plus_constant (Pmode, frame, | |
3061 | total_size - UNITS_PER_WORD); | |
f7df4a84 | 3062 | rtx note = gen_rtx_SET (gen_frame_mem (SImode, a0_addr), |
590e2636 MF |
3063 | gen_rtx_REG (SImode, A0_REG)); |
3064 | rtx insn; | |
3065 | ||
3066 | if (total_size > 1024) { | |
3067 | emit_move_insn (scratch, GEN_INT (total_size - UNITS_PER_WORD)); | |
3068 | emit_insn (gen_addsi3 (scratch, frame, scratch)); | |
3069 | a0_addr = scratch; | |
3070 | } | |
3071 | ||
3072 | insn = emit_move_insn (gen_frame_mem (SImode, a0_addr), address); | |
3073 | RTX_FRAME_RELATED_P (insn) = 1; | |
3074 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note); | |
3075 | } | |
03984308 | 3076 | |
0c14a54d | 3077 | rtx |
ffbc8796 | 3078 | xtensa_return_addr (int count, rtx frame) |
0c14a54d | 3079 | { |
7f0ee694 | 3080 | rtx result, retaddr, curaddr, label; |
0c14a54d | 3081 | |
590e2636 MF |
3082 | if (!TARGET_WINDOWED_ABI) |
3083 | { | |
3084 | if (count != 0) | |
3085 | return const0_rtx; | |
3086 | ||
3087 | return get_hard_reg_initial_val (Pmode, A0_REG); | |
3088 | } | |
3089 | ||
0c14a54d | 3090 | if (count == -1) |
f42f5a1b | 3091 | retaddr = gen_rtx_REG (Pmode, A0_REG); |
0c14a54d BW |
3092 | else |
3093 | { | |
0a81f074 | 3094 | rtx addr = plus_constant (Pmode, frame, -4 * UNITS_PER_WORD); |
0c14a54d BW |
3095 | addr = memory_address (Pmode, addr); |
3096 | retaddr = gen_reg_rtx (Pmode); | |
3097 | emit_move_insn (retaddr, gen_rtx_MEM (Pmode, addr)); | |
3098 | } | |
3099 | ||
3100 | /* The 2 most-significant bits of the return address on Xtensa hold | |
3101 | the register window size. To get the real return address, these | |
7f0ee694 BW |
3102 | bits must be replaced with the high bits from some address in the |
3103 | code. */ | |
3104 | ||
3105 | /* Get the 2 high bits of a local label in the code. */ | |
3106 | curaddr = gen_reg_rtx (Pmode); | |
3107 | label = gen_label_rtx (); | |
3108 | emit_label (label); | |
3109 | LABEL_PRESERVE_P (label) = 1; | |
3110 | emit_move_insn (curaddr, gen_rtx_LABEL_REF (Pmode, label)); | |
3111 | emit_insn (gen_lshrsi3 (curaddr, curaddr, GEN_INT (30))); | |
3112 | emit_insn (gen_ashlsi3 (curaddr, curaddr, GEN_INT (30))); | |
3113 | ||
3114 | /* Clear the 2 high bits of the return address. */ | |
0c14a54d | 3115 | result = gen_reg_rtx (Pmode); |
7f0ee694 BW |
3116 | emit_insn (gen_ashlsi3 (result, retaddr, GEN_INT (2))); |
3117 | emit_insn (gen_lshrsi3 (result, result, GEN_INT (2))); | |
3118 | ||
3119 | /* Combine them to get the result. */ | |
3120 | emit_insn (gen_iorsi3 (result, result, curaddr)); | |
0c14a54d BW |
3121 | return result; |
3122 | } | |
3123 | ||
d9886a9e L |
3124 | /* Disable the use of word-sized or smaller complex modes for structures, |
3125 | and for function arguments in particular, where they cause problems with | |
3126 | register a7. The xtensa_copy_incoming_a7 function assumes that there is | |
3127 | a single reference to an argument in a7, but with small complex modes the | |
3128 | real and imaginary components may be extracted separately, leading to two | |
3129 | uses of the register, only one of which would be replaced. */ | |
3130 | ||
3131 | static bool | |
ef4bddc2 | 3132 | xtensa_member_type_forces_blk (const_tree, machine_mode mode) |
d9886a9e L |
3133 | { |
3134 | return mode == CQImode || mode == CHImode; | |
3135 | } | |
0c14a54d | 3136 | |
03984308 | 3137 | /* Create the va_list data type. |
822e895c BW |
3138 | |
3139 | This structure is set up by __builtin_saveregs. The __va_reg field | |
3140 | points to a stack-allocated region holding the contents of the | |
3141 | incoming argument registers. The __va_ndx field is an index | |
3142 | initialized to the position of the first unnamed (variable) | |
3143 | argument. This same index is also used to address the arguments | |
3144 | passed in memory. Thus, the __va_stk field is initialized to point | |
3145 | to the position of the first argument in memory offset to account | |
3146 | for the arguments passed in registers and to account for the size | |
3147 | of the argument registers not being 16-byte aligned. E.G., there | |
3148 | are 6 argument registers of 4 bytes each, but we want the __va_ndx | |
3149 | for the first stack argument to have the maximal alignment of 16 | |
3150 | bytes, so we offset the __va_stk address by 32 bytes so that | |
3151 | __va_stk[32] references the first argument on the stack. */ | |
03984308 | 3152 | |
c35d187f RH |
3153 | static tree |
3154 | xtensa_build_builtin_va_list (void) | |
03984308 | 3155 | { |
540eaea8 | 3156 | tree f_stk, f_reg, f_ndx, record, type_decl; |
03984308 | 3157 | |
540eaea8 | 3158 | record = (*lang_hooks.types.make_type) (RECORD_TYPE); |
4c4bde29 AH |
3159 | type_decl = build_decl (BUILTINS_LOCATION, |
3160 | TYPE_DECL, get_identifier ("__va_list_tag"), record); | |
03984308 | 3161 | |
4c4bde29 AH |
3162 | f_stk = build_decl (BUILTINS_LOCATION, |
3163 | FIELD_DECL, get_identifier ("__va_stk"), | |
03984308 | 3164 | ptr_type_node); |
4c4bde29 AH |
3165 | f_reg = build_decl (BUILTINS_LOCATION, |
3166 | FIELD_DECL, get_identifier ("__va_reg"), | |
03984308 | 3167 | ptr_type_node); |
4c4bde29 AH |
3168 | f_ndx = build_decl (BUILTINS_LOCATION, |
3169 | FIELD_DECL, get_identifier ("__va_ndx"), | |
03984308 BW |
3170 | integer_type_node); |
3171 | ||
3172 | DECL_FIELD_CONTEXT (f_stk) = record; | |
3173 | DECL_FIELD_CONTEXT (f_reg) = record; | |
3174 | DECL_FIELD_CONTEXT (f_ndx) = record; | |
3175 | ||
0fd2eac2 | 3176 | TYPE_STUB_DECL (record) = type_decl; |
540eaea8 | 3177 | TYPE_NAME (record) = type_decl; |
03984308 | 3178 | TYPE_FIELDS (record) = f_stk; |
910ad8de NF |
3179 | DECL_CHAIN (f_stk) = f_reg; |
3180 | DECL_CHAIN (f_reg) = f_ndx; | |
03984308 BW |
3181 | |
3182 | layout_type (record); | |
3183 | return record; | |
3184 | } | |
3185 | ||
3186 | ||
3187 | /* Save the incoming argument registers on the stack. Returns the | |
638db43e | 3188 | address of the saved registers. */ |
03984308 | 3189 | |
4c45af42 | 3190 | static rtx |
ffbc8796 | 3191 | xtensa_builtin_saveregs (void) |
03984308 | 3192 | { |
e70312d4 | 3193 | rtx gp_regs; |
38173d38 | 3194 | int arg_words = crtl->args.info.arg_words; |
03984308 | 3195 | int gp_left = MAX_ARGS_IN_REGISTERS - arg_words; |
03984308 | 3196 | |
997b8b4d | 3197 | if (gp_left <= 0) |
03984308 BW |
3198 | return const0_rtx; |
3199 | ||
3bbc2af6 | 3200 | /* Allocate the general-purpose register space. */ |
03984308 BW |
3201 | gp_regs = assign_stack_local |
3202 | (BLKmode, MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD, -1); | |
540eaea8 | 3203 | set_mem_alias_set (gp_regs, get_varargs_alias_set ()); |
03984308 BW |
3204 | |
3205 | /* Now store the incoming registers. */ | |
590e2636 | 3206 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
997b8b4d | 3207 | cfun->machine->vararg_a7 = true; |
e70312d4 BW |
3208 | move_block_from_reg (GP_ARG_FIRST + arg_words, |
3209 | adjust_address (gp_regs, BLKmode, | |
3210 | arg_words * UNITS_PER_WORD), | |
3211 | gp_left); | |
590e2636 MF |
3212 | if (cfun->machine->vararg_a7_copy != 0) |
3213 | emit_insn_before (cfun->machine->vararg_a7_copy, get_insns ()); | |
03984308 BW |
3214 | |
3215 | return XEXP (gp_regs, 0); | |
3216 | } | |
3217 | ||
3218 | ||
3219 | /* Implement `va_start' for varargs and stdarg. We look at the | |
638db43e | 3220 | current function to fill in an initial va_list. */ |
03984308 | 3221 | |
d7bd8aeb | 3222 | static void |
ffbc8796 | 3223 | xtensa_va_start (tree valist, rtx nextarg ATTRIBUTE_UNUSED) |
03984308 BW |
3224 | { |
3225 | tree f_stk, stk; | |
3226 | tree f_reg, reg; | |
3227 | tree f_ndx, ndx; | |
3228 | tree t, u; | |
3229 | int arg_words; | |
3230 | ||
38173d38 | 3231 | arg_words = crtl->args.info.arg_words; |
03984308 BW |
3232 | |
3233 | f_stk = TYPE_FIELDS (va_list_type_node); | |
910ad8de NF |
3234 | f_reg = DECL_CHAIN (f_stk); |
3235 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3236 | |
47a25a46 | 3237 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, f_stk, NULL_TREE); |
fa1615d7 BW |
3238 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), |
3239 | f_reg, NULL_TREE); | |
3240 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3241 | f_ndx, NULL_TREE); | |
03984308 BW |
3242 | |
3243 | /* Call __builtin_saveregs; save the result in __va_reg */ | |
e70312d4 BW |
3244 | u = make_tree (sizetype, expand_builtin_saveregs ()); |
3245 | u = fold_convert (ptr_type_node, u); | |
726a989a | 3246 | t = build2 (MODIFY_EXPR, ptr_type_node, reg, u); |
03984308 BW |
3247 | TREE_SIDE_EFFECTS (t) = 1; |
3248 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3249 | ||
822e895c | 3250 | /* Set the __va_stk member to ($arg_ptr - 32). */ |
03984308 | 3251 | u = make_tree (ptr_type_node, virtual_incoming_args_rtx); |
5d49b6a7 | 3252 | u = fold_build_pointer_plus_hwi (u, -32); |
726a989a | 3253 | t = build2 (MODIFY_EXPR, ptr_type_node, stk, u); |
03984308 BW |
3254 | TREE_SIDE_EFFECTS (t) = 1; |
3255 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3256 | ||
822e895c BW |
3257 | /* Set the __va_ndx member. If the first variable argument is on |
3258 | the stack, adjust __va_ndx by 2 words to account for the extra | |
3259 | alignment offset for __va_stk. */ | |
3260 | if (arg_words >= MAX_ARGS_IN_REGISTERS) | |
3261 | arg_words += 2; | |
726a989a | 3262 | t = build2 (MODIFY_EXPR, integer_type_node, ndx, |
f4d3e7fd | 3263 | build_int_cst (integer_type_node, arg_words * UNITS_PER_WORD)); |
03984308 BW |
3264 | TREE_SIDE_EFFECTS (t) = 1; |
3265 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3266 | } | |
3267 | ||
3268 | ||
3269 | /* Implement `va_arg'. */ | |
3270 | ||
85d53c1d | 3271 | static tree |
726a989a RB |
3272 | xtensa_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
3273 | gimple_seq *post_p ATTRIBUTE_UNUSED) | |
03984308 BW |
3274 | { |
3275 | tree f_stk, stk; | |
3276 | tree f_reg, reg; | |
3277 | tree f_ndx, ndx; | |
85d53c1d RH |
3278 | tree type_size, array, orig_ndx, addr, size, va_size, t; |
3279 | tree lab_false, lab_over, lab_false2; | |
08b0dc1b RH |
3280 | bool indirect; |
3281 | ||
fde65a89 | 3282 | indirect = pass_va_arg_by_reference (type); |
08b0dc1b RH |
3283 | if (indirect) |
3284 | type = build_pointer_type (type); | |
03984308 | 3285 | |
3712281f BW |
3286 | /* Handle complex values as separate real and imaginary parts. */ |
3287 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
3288 | { | |
85d53c1d | 3289 | tree real_part, imag_part; |
3712281f | 3290 | |
85d53c1d RH |
3291 | real_part = xtensa_gimplify_va_arg_expr (valist, TREE_TYPE (type), |
3292 | pre_p, NULL); | |
3293 | real_part = get_initialized_tmp_var (real_part, pre_p, NULL); | |
3712281f | 3294 | |
fa1615d7 BW |
3295 | imag_part = xtensa_gimplify_va_arg_expr (unshare_expr (valist), |
3296 | TREE_TYPE (type), | |
85d53c1d RH |
3297 | pre_p, NULL); |
3298 | imag_part = get_initialized_tmp_var (imag_part, pre_p, NULL); | |
3712281f | 3299 | |
47a25a46 | 3300 | return build2 (COMPLEX_EXPR, type, real_part, imag_part); |
3712281f BW |
3301 | } |
3302 | ||
03984308 | 3303 | f_stk = TYPE_FIELDS (va_list_type_node); |
910ad8de NF |
3304 | f_reg = DECL_CHAIN (f_stk); |
3305 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3306 | |
fa1615d7 BW |
3307 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, |
3308 | f_stk, NULL_TREE); | |
3309 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), | |
3310 | f_reg, NULL_TREE); | |
3311 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3312 | f_ndx, NULL_TREE); | |
03984308 | 3313 | |
85d53c1d RH |
3314 | type_size = size_in_bytes (type); |
3315 | va_size = round_up (type_size, UNITS_PER_WORD); | |
3316 | gimplify_expr (&va_size, pre_p, NULL, is_gimple_val, fb_rvalue); | |
8be56275 | 3317 | |
03984308 | 3318 | |
822e895c | 3319 | /* First align __va_ndx if necessary for this arg: |
03984308 | 3320 | |
85d53c1d | 3321 | orig_ndx = (AP).__va_ndx; |
822e895c | 3322 | if (__alignof__ (TYPE) > 4 ) |
85d53c1d | 3323 | orig_ndx = ((orig_ndx + __alignof__ (TYPE) - 1) |
822e895c | 3324 | & -__alignof__ (TYPE)); */ |
03984308 | 3325 | |
85d53c1d RH |
3326 | orig_ndx = get_initialized_tmp_var (ndx, pre_p, NULL); |
3327 | ||
03984308 BW |
3328 | if (TYPE_ALIGN (type) > BITS_PER_WORD) |
3329 | { | |
d2348985 | 3330 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_UNIT; |
85d53c1d | 3331 | |
fa1615d7 | 3332 | t = build2 (PLUS_EXPR, integer_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3333 | build_int_cst (integer_type_node, align - 1)); |
3334 | t = build2 (BIT_AND_EXPR, integer_type_node, t, | |
3335 | build_int_cst (integer_type_node, -align)); | |
fa1615d7 | 3336 | gimplify_assign (unshare_expr (orig_ndx), t, pre_p); |
03984308 BW |
3337 | } |
3338 | ||
3339 | ||
3340 | /* Increment __va_ndx to point past the argument: | |
3341 | ||
85d53c1d | 3342 | (AP).__va_ndx = orig_ndx + __va_size (TYPE); */ |
03984308 | 3343 | |
85d53c1d | 3344 | t = fold_convert (integer_type_node, va_size); |
47a25a46 | 3345 | t = build2 (PLUS_EXPR, integer_type_node, orig_ndx, t); |
fa1615d7 | 3346 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 BW |
3347 | |
3348 | ||
3349 | /* Check if the argument is in registers: | |
3350 | ||
bcf88f9b | 3351 | if ((AP).__va_ndx <= __MAX_ARGS_IN_REGISTERS * 4 |
fe984136 | 3352 | && !must_pass_in_stack (type)) |
ffbc8796 | 3353 | __array = (AP).__va_reg; */ |
03984308 | 3354 | |
9b489f31 | 3355 | array = create_tmp_var (ptr_type_node); |
03984308 | 3356 | |
85d53c1d | 3357 | lab_over = NULL; |
4f53599c | 3358 | if (!must_pass_va_arg_in_stack (type)) |
bcf88f9b | 3359 | { |
4c4bde29 AH |
3360 | lab_false = create_artificial_label (UNKNOWN_LOCATION); |
3361 | lab_over = create_artificial_label (UNKNOWN_LOCATION); | |
85d53c1d | 3362 | |
fa1615d7 | 3363 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (ndx), |
f4d3e7fd BW |
3364 | build_int_cst (integer_type_node, |
3365 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3366 | t = build3 (COND_EXPR, void_type_node, t, |
3367 | build1 (GOTO_EXPR, void_type_node, lab_false), | |
3368 | NULL_TREE); | |
85d53c1d RH |
3369 | gimplify_and_add (t, pre_p); |
3370 | ||
fa1615d7 | 3371 | gimplify_assign (unshare_expr (array), reg, pre_p); |
85d53c1d | 3372 | |
47a25a46 | 3373 | t = build1 (GOTO_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3374 | gimplify_and_add (t, pre_p); |
3375 | ||
47a25a46 | 3376 | t = build1 (LABEL_EXPR, void_type_node, lab_false); |
85d53c1d | 3377 | gimplify_and_add (t, pre_p); |
bcf88f9b | 3378 | } |
03984308 | 3379 | |
85d53c1d | 3380 | |
03984308 BW |
3381 | /* ...otherwise, the argument is on the stack (never split between |
3382 | registers and the stack -- change __va_ndx if necessary): | |
3383 | ||
3384 | else | |
3385 | { | |
822e895c BW |
3386 | if (orig_ndx <= __MAX_ARGS_IN_REGISTERS * 4) |
3387 | (AP).__va_ndx = 32 + __va_size (TYPE); | |
03984308 | 3388 | __array = (AP).__va_stk; |
ffbc8796 | 3389 | } */ |
03984308 | 3390 | |
4c4bde29 | 3391 | lab_false2 = create_artificial_label (UNKNOWN_LOCATION); |
03984308 | 3392 | |
fa1615d7 | 3393 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3394 | build_int_cst (integer_type_node, |
3395 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3396 | t = build3 (COND_EXPR, void_type_node, t, |
3397 | build1 (GOTO_EXPR, void_type_node, lab_false2), | |
3398 | NULL_TREE); | |
85d53c1d | 3399 | gimplify_and_add (t, pre_p); |
03984308 | 3400 | |
fa1615d7 | 3401 | t = size_binop (PLUS_EXPR, unshare_expr (va_size), size_int (32)); |
85d53c1d | 3402 | t = fold_convert (integer_type_node, t); |
fa1615d7 | 3403 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 | 3404 | |
47a25a46 | 3405 | t = build1 (LABEL_EXPR, void_type_node, lab_false2); |
85d53c1d | 3406 | gimplify_and_add (t, pre_p); |
03984308 | 3407 | |
726a989a | 3408 | gimplify_assign (array, stk, pre_p); |
85d53c1d RH |
3409 | |
3410 | if (lab_over) | |
3411 | { | |
47a25a46 | 3412 | t = build1 (LABEL_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3413 | gimplify_and_add (t, pre_p); |
3414 | } | |
8be56275 | 3415 | |
03984308 BW |
3416 | |
3417 | /* Given the base array pointer (__array) and index to the subsequent | |
3418 | argument (__va_ndx), find the address: | |
3419 | ||
8be56275 BW |
3420 | __array + (AP).__va_ndx - (BYTES_BIG_ENDIAN && sizeof (TYPE) < 4 |
3421 | ? sizeof (TYPE) | |
3422 | : __va_size (TYPE)) | |
03984308 BW |
3423 | |
3424 | The results are endian-dependent because values smaller than one word | |
ffbc8796 | 3425 | are aligned differently. */ |
03984308 | 3426 | |
633e4eb4 | 3427 | |
85d91d5b | 3428 | if (BYTES_BIG_ENDIAN && TREE_CODE (type_size) == INTEGER_CST) |
8be56275 | 3429 | { |
fa1615d7 | 3430 | t = fold_build2 (GE_EXPR, boolean_type_node, unshare_expr (type_size), |
e70312d4 | 3431 | size_int (PARM_BOUNDARY / BITS_PER_UNIT)); |
fa1615d7 BW |
3432 | t = fold_build3 (COND_EXPR, sizetype, t, unshare_expr (va_size), |
3433 | unshare_expr (type_size)); | |
85d53c1d | 3434 | size = t; |
8be56275 | 3435 | } |
85d53c1d | 3436 | else |
fa1615d7 | 3437 | size = unshare_expr (va_size); |
85d53c1d | 3438 | |
fa1615d7 | 3439 | t = fold_convert (sizetype, unshare_expr (ndx)); |
f4d3e7fd | 3440 | t = build2 (MINUS_EXPR, sizetype, t, size); |
5d49b6a7 | 3441 | addr = fold_build_pointer_plus (unshare_expr (array), t); |
03984308 | 3442 | |
85d53c1d | 3443 | addr = fold_convert (build_pointer_type (type), addr); |
08b0dc1b | 3444 | if (indirect) |
d6e9821f RH |
3445 | addr = build_va_arg_indirect_ref (addr); |
3446 | return build_va_arg_indirect_ref (addr); | |
03984308 BW |
3447 | } |
3448 | ||
3449 | ||
09fa8841 BW |
3450 | /* Builtins. */ |
3451 | ||
3452 | enum xtensa_builtin | |
3453 | { | |
3454 | XTENSA_BUILTIN_UMULSIDI3, | |
3455 | XTENSA_BUILTIN_max | |
3456 | }; | |
3457 | ||
3458 | ||
3459 | static void | |
3460 | xtensa_init_builtins (void) | |
3461 | { | |
6a7a462c | 3462 | tree ftype, decl; |
09fa8841 BW |
3463 | |
3464 | ftype = build_function_type_list (unsigned_intDI_type_node, | |
3465 | unsigned_intSI_type_node, | |
3466 | unsigned_intSI_type_node, NULL_TREE); | |
3467 | ||
6a7a462c BW |
3468 | decl = add_builtin_function ("__builtin_umulsidi3", ftype, |
3469 | XTENSA_BUILTIN_UMULSIDI3, BUILT_IN_MD, | |
3470 | "__umulsidi3", NULL_TREE); | |
3471 | TREE_NOTHROW (decl) = 1; | |
3472 | TREE_READONLY (decl) = 1; | |
09fa8841 BW |
3473 | } |
3474 | ||
3475 | ||
3476 | static tree | |
f311c3b4 NF |
3477 | xtensa_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *args, |
3478 | bool ignore ATTRIBUTE_UNUSED) | |
09fa8841 | 3479 | { |
4d732405 | 3480 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
09fa8841 BW |
3481 | tree arg0, arg1; |
3482 | ||
6a7a462c | 3483 | switch (fcode) |
09fa8841 | 3484 | { |
6a7a462c | 3485 | case XTENSA_BUILTIN_UMULSIDI3: |
f311c3b4 NF |
3486 | arg0 = args[0]; |
3487 | arg1 = args[1]; | |
09fa8841 BW |
3488 | if ((TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST) |
3489 | || TARGET_MUL32_HIGH) | |
3490 | return fold_build2 (MULT_EXPR, unsigned_intDI_type_node, | |
3491 | fold_convert (unsigned_intDI_type_node, arg0), | |
3492 | fold_convert (unsigned_intDI_type_node, arg1)); | |
6a7a462c BW |
3493 | break; |
3494 | ||
6a7a462c BW |
3495 | default: |
3496 | internal_error ("bad builtin code"); | |
3497 | break; | |
09fa8841 BW |
3498 | } |
3499 | ||
09fa8841 BW |
3500 | return NULL; |
3501 | } | |
3502 | ||
3503 | ||
3504 | static rtx | |
3505 | xtensa_expand_builtin (tree exp, rtx target, | |
3506 | rtx subtarget ATTRIBUTE_UNUSED, | |
ef4bddc2 | 3507 | machine_mode mode ATTRIBUTE_UNUSED, |
09fa8841 BW |
3508 | int ignore) |
3509 | { | |
ec3643e8 | 3510 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
4d732405 | 3511 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
6a7a462c BW |
3512 | |
3513 | switch (fcode) | |
3514 | { | |
3515 | case XTENSA_BUILTIN_UMULSIDI3: | |
3516 | /* The umulsidi3 builtin is just a mechanism to avoid calling the real | |
3517 | __umulsidi3 function when the Xtensa configuration can directly | |
3518 | implement it. If not, just call the function. */ | |
3519 | return expand_call (exp, target, ignore); | |
09fa8841 | 3520 | |
6a7a462c BW |
3521 | default: |
3522 | internal_error ("bad builtin code"); | |
3523 | } | |
09fa8841 BW |
3524 | return NULL_RTX; |
3525 | } | |
3526 | ||
a6e508f9 | 3527 | /* Worker function for TARGET_PREFERRED_RELOAD_CLASS. */ |
09fa8841 | 3528 | |
a6e508f9 AS |
3529 | static reg_class_t |
3530 | xtensa_preferred_reload_class (rtx x, reg_class_t rclass) | |
a8cacfd2 | 3531 | { |
a6e508f9 | 3532 | if (CONSTANT_P (x) && CONST_DOUBLE_P (x)) |
a8cacfd2 BW |
3533 | return NO_REGS; |
3534 | ||
89f6025d BW |
3535 | /* Don't use the stack pointer or hard frame pointer for reloads! |
3536 | The hard frame pointer would normally be OK except that it may | |
3537 | briefly hold an incoming argument in the prologue, and reload | |
3538 | won't know that it is live because the hard frame pointer is | |
3539 | treated specially. */ | |
3540 | ||
0a2aaacc | 3541 | if (rclass == AR_REGS || rclass == GR_REGS) |
89f6025d | 3542 | return RL_REGS; |
a8cacfd2 | 3543 | |
0a2aaacc | 3544 | return rclass; |
a8cacfd2 BW |
3545 | } |
3546 | ||
a6e508f9 AS |
3547 | /* Worker function for TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. */ |
3548 | ||
3549 | static reg_class_t | |
3550 | xtensa_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
3551 | reg_class_t rclass) | |
3552 | { | |
3553 | /* Don't use the stack pointer or hard frame pointer for reloads! | |
3554 | The hard frame pointer would normally be OK except that it may | |
3555 | briefly hold an incoming argument in the prologue, and reload | |
3556 | won't know that it is live because the hard frame pointer is | |
3557 | treated specially. */ | |
3558 | ||
3559 | if (rclass == AR_REGS || rclass == GR_REGS) | |
3560 | return RL_REGS; | |
3561 | ||
3562 | return rclass; | |
3563 | } | |
3564 | ||
3565 | /* Worker function for TARGET_SECONDARY_RELOAD. */ | |
a8cacfd2 | 3566 | |
a6e508f9 | 3567 | static reg_class_t |
a87cf97e | 3568 | xtensa_secondary_reload (bool in_p, rtx x, reg_class_t rclass, |
ef4bddc2 | 3569 | machine_mode mode, secondary_reload_info *sri) |
03984308 BW |
3570 | { |
3571 | int regno; | |
3572 | ||
37fbe8a3 | 3573 | if (in_p && constantpool_mem_p (x)) |
03984308 | 3574 | { |
37fbe8a3 | 3575 | if (rclass == FP_REGS) |
89f6025d | 3576 | return RL_REGS; |
37fbe8a3 BW |
3577 | |
3578 | if (mode == QImode) | |
3579 | sri->icode = CODE_FOR_reloadqi_literal; | |
3580 | else if (mode == HImode) | |
3581 | sri->icode = CODE_FOR_reloadhi_literal; | |
03984308 BW |
3582 | } |
3583 | ||
37fbe8a3 | 3584 | regno = xt_true_regnum (x); |
03984308 | 3585 | if (ACC_REG_P (regno)) |
0a2aaacc KG |
3586 | return ((rclass == GR_REGS || rclass == RL_REGS) ? NO_REGS : RL_REGS); |
3587 | if (rclass == ACC_REG) | |
89f6025d | 3588 | return (GP_REG_P (regno) ? NO_REGS : RL_REGS); |
03984308 BW |
3589 | |
3590 | return NO_REGS; | |
3591 | } | |
3592 | ||
3593 | ||
3594 | void | |
ffbc8796 | 3595 | order_regs_for_local_alloc (void) |
03984308 BW |
3596 | { |
3597 | if (!leaf_function_p ()) | |
3598 | { | |
590e2636 MF |
3599 | static const int reg_nonleaf_alloc_order[FIRST_PSEUDO_REGISTER] = |
3600 | REG_ALLOC_ORDER; | |
3601 | static const int reg_nonleaf_alloc_order_call0[FIRST_PSEUDO_REGISTER] = | |
3602 | { | |
3603 | 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 12, 13, 14, 15, | |
3604 | 18, | |
3605 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, | |
3606 | 0, 1, 16, 17, | |
3607 | 35, | |
3608 | }; | |
3609 | ||
3610 | memcpy (reg_alloc_order, TARGET_WINDOWED_ABI ? | |
3611 | reg_nonleaf_alloc_order : reg_nonleaf_alloc_order_call0, | |
03984308 BW |
3612 | FIRST_PSEUDO_REGISTER * sizeof (int)); |
3613 | } | |
3614 | else | |
3615 | { | |
3616 | int i, num_arg_regs; | |
3617 | int nxt = 0; | |
3618 | ||
3bbc2af6 KH |
3619 | /* Use the AR registers in increasing order (skipping a0 and a1) |
3620 | but save the incoming argument registers for a last resort. */ | |
38173d38 | 3621 | num_arg_regs = crtl->args.info.arg_words; |
03984308 BW |
3622 | if (num_arg_regs > MAX_ARGS_IN_REGISTERS) |
3623 | num_arg_regs = MAX_ARGS_IN_REGISTERS; | |
3624 | for (i = GP_ARG_FIRST; i < 16 - num_arg_regs; i++) | |
3625 | reg_alloc_order[nxt++] = i + num_arg_regs; | |
3626 | for (i = 0; i < num_arg_regs; i++) | |
3627 | reg_alloc_order[nxt++] = GP_ARG_FIRST + i; | |
3628 | ||
3bbc2af6 | 3629 | /* List the coprocessor registers in order. */ |
985d0d50 BW |
3630 | for (i = 0; i < BR_REG_NUM; i++) |
3631 | reg_alloc_order[nxt++] = BR_REG_FIRST + i; | |
3632 | ||
3bbc2af6 | 3633 | /* List the FP registers in order for now. */ |
03984308 BW |
3634 | for (i = 0; i < 16; i++) |
3635 | reg_alloc_order[nxt++] = FP_REG_FIRST + i; | |
3636 | ||
638db43e | 3637 | /* GCC requires that we list *all* the registers.... */ |
03984308 BW |
3638 | reg_alloc_order[nxt++] = 0; /* a0 = return address */ |
3639 | reg_alloc_order[nxt++] = 1; /* a1 = stack pointer */ | |
3640 | reg_alloc_order[nxt++] = 16; /* pseudo frame pointer */ | |
3641 | reg_alloc_order[nxt++] = 17; /* pseudo arg pointer */ | |
3642 | ||
03984308 BW |
3643 | reg_alloc_order[nxt++] = ACC_REG_FIRST; /* MAC16 accumulator */ |
3644 | } | |
3645 | } | |
3646 | ||
3647 | ||
01abf342 BW |
3648 | /* Some Xtensa targets support multiple bss sections. If the section |
3649 | name ends with ".bss", add SECTION_BSS to the flags. */ | |
3650 | ||
3651 | static unsigned int | |
ffbc8796 | 3652 | xtensa_multibss_section_type_flags (tree decl, const char *name, int reloc) |
01abf342 BW |
3653 | { |
3654 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
3655 | const char *suffix; | |
3656 | ||
3657 | suffix = strrchr (name, '.'); | |
3658 | if (suffix && strcmp (suffix, ".bss") == 0) | |
3659 | { | |
3660 | if (!decl || (TREE_CODE (decl) == VAR_DECL | |
3661 | && DECL_INITIAL (decl) == NULL_TREE)) | |
3662 | flags |= SECTION_BSS; /* @nobits */ | |
3663 | else | |
d4ee4d25 | 3664 | warning (0, "only uninitialized variables can be placed in a " |
01abf342 BW |
3665 | ".bss section"); |
3666 | } | |
3667 | ||
3668 | return flags; | |
3669 | } | |
3670 | ||
3671 | ||
b64a1b53 RH |
3672 | /* The literal pool stays with the function. */ |
3673 | ||
d6b5193b | 3674 | static section * |
ef4bddc2 | 3675 | xtensa_select_rtx_section (machine_mode mode ATTRIBUTE_UNUSED, |
ffbc8796 BW |
3676 | rtx x ATTRIBUTE_UNUSED, |
3677 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 3678 | { |
d6b5193b | 3679 | return function_section (current_function_decl); |
b64a1b53 | 3680 | } |
fb49053f | 3681 | |
5378dda2 AS |
3682 | /* Worker function for TARGET_REGISTER_MOVE_COST. */ |
3683 | ||
3684 | static int | |
ef4bddc2 | 3685 | xtensa_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3686 | reg_class_t from, reg_class_t to) |
3687 | { | |
3688 | if (from == to && from != BR_REGS && to != BR_REGS) | |
3689 | return 2; | |
3690 | else if (reg_class_subset_p (from, AR_REGS) | |
3691 | && reg_class_subset_p (to, AR_REGS)) | |
3692 | return 2; | |
3693 | else if (reg_class_subset_p (from, AR_REGS) && to == ACC_REG) | |
3694 | return 3; | |
3695 | else if (from == ACC_REG && reg_class_subset_p (to, AR_REGS)) | |
3696 | return 3; | |
3697 | else | |
3698 | return 10; | |
3699 | } | |
3700 | ||
3701 | /* Worker function for TARGET_MEMORY_MOVE_COST. */ | |
3702 | ||
3703 | static int | |
ef4bddc2 | 3704 | xtensa_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3705 | reg_class_t rclass ATTRIBUTE_UNUSED, |
3706 | bool in ATTRIBUTE_UNUSED) | |
3707 | { | |
3708 | return 4; | |
3709 | } | |
ffbc8796 | 3710 | |
3c50106f RH |
3711 | /* Compute a (partial) cost for rtx X. Return true if the complete |
3712 | cost has been computed, and false if subexpressions should be | |
3713 | scanned. In either case, *TOTAL contains the cost result. */ | |
3714 | ||
3715 | static bool | |
e548c9df AM |
3716 | xtensa_rtx_costs (rtx x, machine_mode mode, int outer_code, |
3717 | int opno ATTRIBUTE_UNUSED, | |
68f932c4 | 3718 | int *total, bool speed ATTRIBUTE_UNUSED) |
3c50106f | 3719 | { |
e548c9df AM |
3720 | int code = GET_CODE (x); |
3721 | ||
3c50106f RH |
3722 | switch (code) |
3723 | { | |
3724 | case CONST_INT: | |
3725 | switch (outer_code) | |
3726 | { | |
3727 | case SET: | |
3728 | if (xtensa_simm12b (INTVAL (x))) | |
3729 | { | |
3730 | *total = 4; | |
3731 | return true; | |
3732 | } | |
3733 | break; | |
3734 | case PLUS: | |
3735 | if (xtensa_simm8 (INTVAL (x)) | |
3736 | || xtensa_simm8x256 (INTVAL (x))) | |
3737 | { | |
3738 | *total = 0; | |
3739 | return true; | |
3740 | } | |
3741 | break; | |
3742 | case AND: | |
3743 | if (xtensa_mask_immediate (INTVAL (x))) | |
3744 | { | |
3745 | *total = 0; | |
3746 | return true; | |
3747 | } | |
3748 | break; | |
3749 | case COMPARE: | |
3750 | if ((INTVAL (x) == 0) || xtensa_b4const (INTVAL (x))) | |
3751 | { | |
3752 | *total = 0; | |
3753 | return true; | |
3754 | } | |
3755 | break; | |
3756 | case ASHIFT: | |
3757 | case ASHIFTRT: | |
3758 | case LSHIFTRT: | |
3759 | case ROTATE: | |
3760 | case ROTATERT: | |
3bbc2af6 | 3761 | /* No way to tell if X is the 2nd operand so be conservative. */ |
3c50106f RH |
3762 | default: break; |
3763 | } | |
3764 | if (xtensa_simm12b (INTVAL (x))) | |
3765 | *total = 5; | |
f42f5a1b BW |
3766 | else if (TARGET_CONST16) |
3767 | *total = COSTS_N_INSNS (2); | |
3c50106f RH |
3768 | else |
3769 | *total = 6; | |
3770 | return true; | |
3771 | ||
3772 | case CONST: | |
3773 | case LABEL_REF: | |
3774 | case SYMBOL_REF: | |
f42f5a1b BW |
3775 | if (TARGET_CONST16) |
3776 | *total = COSTS_N_INSNS (2); | |
3777 | else | |
3778 | *total = 5; | |
3c50106f RH |
3779 | return true; |
3780 | ||
3781 | case CONST_DOUBLE: | |
f42f5a1b BW |
3782 | if (TARGET_CONST16) |
3783 | *total = COSTS_N_INSNS (4); | |
3784 | else | |
3785 | *total = 7; | |
3c50106f RH |
3786 | return true; |
3787 | ||
3788 | case MEM: | |
3789 | { | |
3790 | int num_words = | |
e548c9df | 3791 | (GET_MODE_SIZE (mode) > UNITS_PER_WORD) ? 2 : 1; |
3c50106f | 3792 | |
e548c9df | 3793 | if (memory_address_p (mode, XEXP ((x), 0))) |
3c50106f RH |
3794 | *total = COSTS_N_INSNS (num_words); |
3795 | else | |
3796 | *total = COSTS_N_INSNS (2*num_words); | |
3797 | return true; | |
3798 | } | |
3799 | ||
3800 | case FFS: | |
09fa8841 | 3801 | case CTZ: |
3c50106f RH |
3802 | *total = COSTS_N_INSNS (TARGET_NSA ? 5 : 50); |
3803 | return true; | |
3804 | ||
09fa8841 BW |
3805 | case CLZ: |
3806 | *total = COSTS_N_INSNS (TARGET_NSA ? 1 : 50); | |
3807 | return true; | |
3808 | ||
3c50106f | 3809 | case NOT: |
e548c9df | 3810 | *total = COSTS_N_INSNS (mode == DImode ? 3 : 2); |
3c50106f RH |
3811 | return true; |
3812 | ||
3813 | case AND: | |
3814 | case IOR: | |
3815 | case XOR: | |
e548c9df | 3816 | if (mode == DImode) |
3c50106f RH |
3817 | *total = COSTS_N_INSNS (2); |
3818 | else | |
3819 | *total = COSTS_N_INSNS (1); | |
3820 | return true; | |
3821 | ||
3822 | case ASHIFT: | |
3823 | case ASHIFTRT: | |
3824 | case LSHIFTRT: | |
e548c9df | 3825 | if (mode == DImode) |
3c50106f RH |
3826 | *total = COSTS_N_INSNS (50); |
3827 | else | |
3828 | *total = COSTS_N_INSNS (1); | |
3829 | return true; | |
3830 | ||
3831 | case ABS: | |
3832 | { | |
e548c9df | 3833 | if (mode == SFmode) |
3c50106f | 3834 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 3835 | else if (mode == DFmode) |
3c50106f RH |
3836 | *total = COSTS_N_INSNS (50); |
3837 | else | |
3838 | *total = COSTS_N_INSNS (4); | |
3839 | return true; | |
3840 | } | |
3841 | ||
3842 | case PLUS: | |
3843 | case MINUS: | |
3844 | { | |
e548c9df | 3845 | if (mode == SFmode) |
3c50106f | 3846 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 3847 | else if (mode == DFmode || mode == DImode) |
3c50106f RH |
3848 | *total = COSTS_N_INSNS (50); |
3849 | else | |
3850 | *total = COSTS_N_INSNS (1); | |
3851 | return true; | |
3852 | } | |
3853 | ||
3854 | case NEG: | |
e548c9df | 3855 | *total = COSTS_N_INSNS (mode == DImode ? 4 : 2); |
3c50106f RH |
3856 | return true; |
3857 | ||
3858 | case MULT: | |
3859 | { | |
e548c9df | 3860 | if (mode == SFmode) |
3c50106f | 3861 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); |
e548c9df | 3862 | else if (mode == DFmode) |
3c50106f | 3863 | *total = COSTS_N_INSNS (50); |
e548c9df | 3864 | else if (mode == DImode) |
09fa8841 | 3865 | *total = COSTS_N_INSNS (TARGET_MUL32_HIGH ? 10 : 50); |
3c50106f RH |
3866 | else if (TARGET_MUL32) |
3867 | *total = COSTS_N_INSNS (4); | |
3868 | else if (TARGET_MAC16) | |
3869 | *total = COSTS_N_INSNS (16); | |
3870 | else if (TARGET_MUL16) | |
3871 | *total = COSTS_N_INSNS (12); | |
3872 | else | |
3873 | *total = COSTS_N_INSNS (50); | |
3874 | return true; | |
3875 | } | |
3876 | ||
3877 | case DIV: | |
3878 | case MOD: | |
3879 | { | |
e548c9df | 3880 | if (mode == SFmode) |
3c50106f RH |
3881 | { |
3882 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); | |
3883 | return true; | |
3884 | } | |
e548c9df | 3885 | else if (mode == DFmode) |
3c50106f RH |
3886 | { |
3887 | *total = COSTS_N_INSNS (50); | |
3888 | return true; | |
3889 | } | |
3890 | } | |
3bbc2af6 | 3891 | /* Fall through. */ |
3c50106f RH |
3892 | |
3893 | case UDIV: | |
3894 | case UMOD: | |
3895 | { | |
e548c9df | 3896 | if (mode == DImode) |
3c50106f RH |
3897 | *total = COSTS_N_INSNS (50); |
3898 | else if (TARGET_DIV32) | |
3899 | *total = COSTS_N_INSNS (32); | |
3900 | else | |
3901 | *total = COSTS_N_INSNS (50); | |
3902 | return true; | |
3903 | } | |
3904 | ||
3905 | case SQRT: | |
e548c9df | 3906 | if (mode == SFmode) |
3c50106f RH |
3907 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); |
3908 | else | |
3909 | *total = COSTS_N_INSNS (50); | |
3910 | return true; | |
3911 | ||
3912 | case SMIN: | |
3913 | case UMIN: | |
3914 | case SMAX: | |
3915 | case UMAX: | |
3916 | *total = COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); | |
3917 | return true; | |
3918 | ||
3919 | case SIGN_EXTRACT: | |
3920 | case SIGN_EXTEND: | |
3921 | *total = COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); | |
3922 | return true; | |
3923 | ||
3924 | case ZERO_EXTRACT: | |
3925 | case ZERO_EXTEND: | |
3926 | *total = COSTS_N_INSNS (1); | |
3927 | return true; | |
3928 | ||
3929 | default: | |
3930 | return false; | |
3931 | } | |
3932 | } | |
3933 | ||
bd5bd7ac KH |
3934 | /* Worker function for TARGET_RETURN_IN_MEMORY. */ |
3935 | ||
4c45af42 | 3936 | static bool |
586de218 | 3937 | xtensa_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) |
4c45af42 KH |
3938 | { |
3939 | return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) | |
3940 | > 4 * UNITS_PER_WORD); | |
3941 | } | |
3942 | ||
e2b2d01e AS |
3943 | /* Worker function for TARGET_FUNCTION_VALUE. */ |
3944 | ||
3945 | rtx | |
3946 | xtensa_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, | |
3947 | bool outgoing) | |
3948 | { | |
3949 | return gen_rtx_REG ((INTEGRAL_TYPE_P (valtype) | |
3950 | && TYPE_PRECISION (valtype) < BITS_PER_WORD) | |
3951 | ? SImode : TYPE_MODE (valtype), | |
3952 | outgoing ? GP_OUTGOING_RETURN : GP_RETURN); | |
3953 | } | |
7f0ee694 | 3954 | |
dde8a3a4 AS |
3955 | /* Worker function for TARGET_LIBCALL_VALUE. */ |
3956 | ||
3957 | static rtx | |
ef4bddc2 | 3958 | xtensa_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
dde8a3a4 AS |
3959 | { |
3960 | return gen_rtx_REG ((GET_MODE_CLASS (mode) == MODE_INT | |
3961 | && GET_MODE_SIZE (mode) < UNITS_PER_WORD) | |
3962 | ? SImode : mode, GP_RETURN); | |
3963 | } | |
3964 | ||
3965 | /* Worker function TARGET_FUNCTION_VALUE_REGNO_P. */ | |
3966 | ||
3967 | static bool | |
3968 | xtensa_function_value_regno_p (const unsigned int regno) | |
3969 | { | |
3970 | return (regno == GP_RETURN); | |
3971 | } | |
3972 | ||
2b4fa409 RH |
3973 | /* The static chain is passed in memory. Provide rtx giving 'mem' |
3974 | expressions that denote where they are stored. */ | |
3975 | ||
3976 | static rtx | |
c21df29b | 3977 | xtensa_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
2b4fa409 | 3978 | { |
590e2636 MF |
3979 | if (TARGET_WINDOWED_ABI) |
3980 | { | |
3981 | rtx base = incoming_p ? arg_pointer_rtx : stack_pointer_rtx; | |
3982 | return gen_frame_mem (Pmode, plus_constant (Pmode, base, | |
3983 | -5 * UNITS_PER_WORD)); | |
3984 | } | |
3985 | else | |
3986 | return gen_rtx_REG (Pmode, A8_REG); | |
2b4fa409 RH |
3987 | } |
3988 | ||
3989 | ||
7f0ee694 BW |
3990 | /* TRAMPOLINE_TEMPLATE: For Xtensa, the trampoline must perform an ENTRY |
3991 | instruction with a minimal stack frame in order to get some free | |
3992 | registers. Once the actual call target is known, the proper stack frame | |
3993 | size is extracted from the ENTRY instruction at the target and the | |
3994 | current frame is adjusted to match. The trampoline then transfers | |
3995 | control to the instruction following the ENTRY at the target. Note: | |
3996 | this assumes that the target begins with an ENTRY instruction. */ | |
3997 | ||
3c1229cb RH |
3998 | static void |
3999 | xtensa_asm_trampoline_template (FILE *stream) | |
7f0ee694 BW |
4000 | { |
4001 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); | |
4002 | ||
4003 | fprintf (stream, "\t.begin no-transform\n"); | |
7f0ee694 | 4004 | |
590e2636 | 4005 | if (TARGET_WINDOWED_ABI) |
7f0ee694 | 4006 | { |
590e2636 | 4007 | fprintf (stream, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); |
7f0ee694 | 4008 | |
590e2636 MF |
4009 | if (use_call0) |
4010 | { | |
4011 | /* Save the return address. */ | |
4012 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4013 | |
590e2636 MF |
4014 | /* Use a CALL0 instruction to skip past the constants and in the |
4015 | process get the PC into A0. This allows PC-relative access to | |
4016 | the constants without relying on L32R. */ | |
4017 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4018 | } | |
4019 | else | |
4020 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4021 | |
590e2636 MF |
4022 | fprintf (stream, "\t.align\t4\n"); |
4023 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4024 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4025 | fprintf (stream, ".Lskipconsts:\n"); | |
4026 | ||
4027 | /* Load the static chain and function address from the trampoline. */ | |
4028 | if (use_call0) | |
4029 | { | |
4030 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4031 | fprintf (stream, "\tl32i\ta9, a0, 0\n"); | |
4032 | fprintf (stream, "\tl32i\ta8, a0, 4\n"); | |
4033 | } | |
4034 | else | |
4035 | { | |
4036 | fprintf (stream, "\tl32r\ta9, .Lchainval\n"); | |
4037 | fprintf (stream, "\tl32r\ta8, .Lfnaddr\n"); | |
4038 | } | |
4039 | ||
4040 | /* Store the static chain. */ | |
4041 | fprintf (stream, "\ts32i\ta9, sp, %d\n", MIN_FRAME_SIZE - 20); | |
4042 | ||
4043 | /* Set the proper stack pointer value. */ | |
4044 | fprintf (stream, "\tl32i\ta9, a8, 0\n"); | |
4045 | fprintf (stream, "\textui\ta9, a9, %d, 12\n", | |
4046 | TARGET_BIG_ENDIAN ? 8 : 12); | |
4047 | fprintf (stream, "\tslli\ta9, a9, 3\n"); | |
4048 | fprintf (stream, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); | |
4049 | fprintf (stream, "\tsub\ta9, sp, a9\n"); | |
4050 | fprintf (stream, "\tmovsp\tsp, a9\n"); | |
4051 | ||
4052 | if (use_call0) | |
4053 | /* Restore the return address. */ | |
4054 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4055 | ||
4056 | /* Jump to the instruction following the ENTRY. */ | |
4057 | fprintf (stream, "\taddi\ta8, a8, 3\n"); | |
4058 | fprintf (stream, "\tjx\ta8\n"); | |
4059 | ||
4060 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ | |
4061 | if (use_call0) | |
4062 | fprintf (stream, "\t.byte\t0\n"); | |
4063 | else | |
4064 | fprintf (stream, "\tnop\n"); | |
7f0ee694 BW |
4065 | } |
4066 | else | |
4067 | { | |
590e2636 MF |
4068 | if (use_call0) |
4069 | { | |
4070 | /* Save the return address. */ | |
4071 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4072 | |
590e2636 MF |
4073 | /* Use a CALL0 instruction to skip past the constants and in the |
4074 | process get the PC into A0. This allows PC-relative access to | |
4075 | the constants without relying on L32R. */ | |
4076 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4077 | } | |
4078 | else | |
4079 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4080 | |
590e2636 MF |
4081 | fprintf (stream, "\t.align\t4\n"); |
4082 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4083 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4084 | fprintf (stream, ".Lskipconsts:\n"); | |
7f0ee694 | 4085 | |
590e2636 MF |
4086 | /* Load the static chain and function address from the trampoline. */ |
4087 | if (use_call0) | |
4088 | { | |
4089 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4090 | fprintf (stream, "\tl32i\ta8, a0, 0\n"); | |
4091 | fprintf (stream, "\tl32i\ta9, a0, 4\n"); | |
4092 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4093 | } | |
4094 | else | |
4095 | { | |
4096 | fprintf (stream, "\tl32r\ta8, .Lchainval\n"); | |
4097 | fprintf (stream, "\tl32r\ta9, .Lfnaddr\n"); | |
4098 | } | |
4099 | fprintf (stream, "\tjx\ta9\n"); | |
7f0ee694 | 4100 | |
590e2636 MF |
4101 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ |
4102 | if (use_call0) | |
4103 | fprintf (stream, "\t.byte\t0\n"); | |
4104 | else | |
4105 | fprintf (stream, "\tnop\n"); | |
4106 | } | |
7f0ee694 BW |
4107 | fprintf (stream, "\t.end no-transform\n"); |
4108 | } | |
4109 | ||
3c1229cb RH |
4110 | static void |
4111 | xtensa_trampoline_init (rtx m_tramp, tree fndecl, rtx chain) | |
7f0ee694 | 4112 | { |
3c1229cb | 4113 | rtx func = XEXP (DECL_RTL (fndecl), 0); |
7f0ee694 | 4114 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); |
590e2636 MF |
4115 | int chain_off; |
4116 | int func_off; | |
4117 | ||
4118 | if (TARGET_WINDOWED_ABI) | |
4119 | { | |
4120 | chain_off = use_call0 ? 12 : 8; | |
4121 | func_off = use_call0 ? 16 : 12; | |
4122 | } | |
4123 | else | |
4124 | { | |
4125 | chain_off = use_call0 ? 8 : 4; | |
4126 | func_off = use_call0 ? 12 : 8; | |
4127 | } | |
3c1229cb RH |
4128 | |
4129 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
4130 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
4131 | ||
4132 | emit_move_insn (adjust_address (m_tramp, SImode, chain_off), chain); | |
4133 | emit_move_insn (adjust_address (m_tramp, SImode, func_off), func); | |
7f0ee694 | 4134 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_sync_caches"), |
db69559b | 4135 | LCT_NORMAL, VOIDmode, XEXP (m_tramp, 0), Pmode); |
7f0ee694 BW |
4136 | } |
4137 | ||
1a627b35 RS |
4138 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
4139 | ||
4140 | static bool | |
ef4bddc2 | 4141 | xtensa_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
1a627b35 RS |
4142 | { |
4143 | return !xtensa_tls_referenced_p (x); | |
4144 | } | |
7f0ee694 | 4145 | |
6383386a FY |
4146 | /* Implement TARGET_CAN_USE_DOLOOP_P. */ |
4147 | ||
4148 | static bool | |
4149 | xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
4150 | unsigned int loop_depth, bool entered_at_top) | |
4151 | { | |
4152 | /* Considering limitations in the hardware, only use doloop | |
4153 | for innermost loops which must be entered from the top. */ | |
4154 | if (loop_depth > 1 || !entered_at_top) | |
4155 | return false; | |
4156 | ||
4157 | return true; | |
4158 | } | |
4159 | ||
4160 | /* NULL if INSN insn is valid within a low-overhead loop. | |
4161 | Otherwise return why doloop cannot be applied. */ | |
4162 | ||
4163 | static const char * | |
4164 | xtensa_invalid_within_doloop (const rtx_insn *insn) | |
4165 | { | |
4166 | if (CALL_P (insn)) | |
4167 | return "Function call in the loop."; | |
4168 | ||
4169 | if (JUMP_P (insn) && INSN_CODE (insn) == CODE_FOR_return) | |
4170 | return "Return from a call instruction in the loop."; | |
4171 | ||
4172 | return NULL; | |
4173 | } | |
4174 | ||
4175 | /* Optimize LOOP. */ | |
4176 | ||
4177 | static bool | |
4178 | hwloop_optimize (hwloop_info loop) | |
4179 | { | |
4180 | int i; | |
4181 | edge entry_edge; | |
4182 | basic_block entry_bb; | |
4183 | rtx iter_reg; | |
4184 | rtx_insn *insn, *seq, *entry_after; | |
4185 | ||
4186 | if (loop->depth > 1) | |
4187 | { | |
4188 | if (dump_file) | |
4189 | fprintf (dump_file, ";; loop %d is not innermost\n", | |
4190 | loop->loop_no); | |
4191 | return false; | |
4192 | } | |
4193 | ||
4194 | if (!loop->incoming_dest) | |
4195 | { | |
4196 | if (dump_file) | |
4197 | fprintf (dump_file, ";; loop %d has more than one entry\n", | |
4198 | loop->loop_no); | |
4199 | return false; | |
4200 | } | |
4201 | ||
4202 | if (loop->incoming_dest != loop->head) | |
4203 | { | |
4204 | if (dump_file) | |
4205 | fprintf (dump_file, ";; loop %d is not entered from head\n", | |
4206 | loop->loop_no); | |
4207 | return false; | |
4208 | } | |
4209 | ||
4210 | if (loop->has_call || loop->has_asm) | |
4211 | { | |
4212 | if (dump_file) | |
4213 | fprintf (dump_file, ";; loop %d has invalid insn\n", | |
4214 | loop->loop_no); | |
4215 | return false; | |
4216 | } | |
4217 | ||
4218 | /* Scan all the blocks to make sure they don't use iter_reg. */ | |
4219 | if (loop->iter_reg_used || loop->iter_reg_used_outside) | |
4220 | { | |
4221 | if (dump_file) | |
4222 | fprintf (dump_file, ";; loop %d uses iterator\n", | |
4223 | loop->loop_no); | |
4224 | return false; | |
4225 | } | |
4226 | ||
4227 | /* Check if start_label appears before doloop_end. */ | |
4228 | insn = loop->start_label; | |
4229 | while (insn && insn != loop->loop_end) | |
4230 | insn = NEXT_INSN (insn); | |
4231 | ||
4232 | if (!insn) | |
4233 | { | |
4234 | if (dump_file) | |
4235 | fprintf (dump_file, ";; loop %d start_label not before loop_end\n", | |
4236 | loop->loop_no); | |
4237 | return false; | |
4238 | } | |
4239 | ||
4240 | /* Get the loop iteration register. */ | |
4241 | iter_reg = loop->iter_reg; | |
4242 | ||
4243 | gcc_assert (REG_P (iter_reg)); | |
4244 | ||
4245 | entry_edge = NULL; | |
4246 | ||
4247 | FOR_EACH_VEC_SAFE_ELT (loop->incoming, i, entry_edge) | |
4248 | if (entry_edge->flags & EDGE_FALLTHRU) | |
4249 | break; | |
4250 | ||
4251 | if (entry_edge == NULL) | |
4252 | return false; | |
4253 | ||
4254 | /* Place the zero_cost_loop_start instruction before the loop. */ | |
4255 | entry_bb = entry_edge->src; | |
4256 | ||
4257 | start_sequence (); | |
4258 | ||
4259 | insn = emit_insn (gen_zero_cost_loop_start (loop->iter_reg, | |
4260 | loop->start_label, | |
4261 | loop->iter_reg)); | |
4262 | ||
4263 | seq = get_insns (); | |
4264 | ||
d7326aaf MF |
4265 | entry_after = BB_END (entry_bb); |
4266 | if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1 | |
4267 | || !entry_after) | |
6383386a FY |
4268 | { |
4269 | basic_block new_bb; | |
4270 | edge e; | |
4271 | edge_iterator ei; | |
4272 | ||
4273 | emit_insn_before (seq, BB_HEAD (loop->head)); | |
4274 | seq = emit_label_before (gen_label_rtx (), seq); | |
4275 | new_bb = create_basic_block (seq, insn, entry_bb); | |
4276 | FOR_EACH_EDGE (e, ei, loop->incoming) | |
4277 | { | |
4278 | if (!(e->flags & EDGE_FALLTHRU)) | |
4279 | redirect_edge_and_branch_force (e, new_bb); | |
4280 | else | |
4281 | redirect_edge_succ (e, new_bb); | |
4282 | } | |
4283 | ||
4284 | make_edge (new_bb, loop->head, 0); | |
4285 | } | |
4286 | else | |
4287 | { | |
6383386a FY |
4288 | while (DEBUG_INSN_P (entry_after) |
4289 | || (NOTE_P (entry_after) | |
00b94487 | 4290 | && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK)) |
6383386a FY |
4291 | entry_after = PREV_INSN (entry_after); |
4292 | ||
4293 | emit_insn_after (seq, entry_after); | |
4294 | } | |
4295 | ||
4296 | end_sequence (); | |
4297 | ||
4298 | return true; | |
4299 | } | |
4300 | ||
4301 | /* A callback for the hw-doloop pass. Called when a loop we have discovered | |
4302 | turns out not to be optimizable; we have to split the loop_end pattern into | |
4303 | a subtract and a test. */ | |
4304 | ||
4305 | static void | |
4306 | hwloop_fail (hwloop_info loop) | |
4307 | { | |
4308 | rtx test; | |
4309 | rtx_insn *insn = loop->loop_end; | |
4310 | ||
4311 | emit_insn_before (gen_addsi3 (loop->iter_reg, | |
4312 | loop->iter_reg, | |
4313 | constm1_rtx), | |
4314 | loop->loop_end); | |
4315 | ||
4316 | test = gen_rtx_NE (VOIDmode, loop->iter_reg, const0_rtx); | |
4317 | insn = emit_jump_insn_before (gen_cbranchsi4 (test, | |
4318 | loop->iter_reg, const0_rtx, | |
4319 | loop->start_label), | |
4320 | loop->loop_end); | |
4321 | ||
4322 | JUMP_LABEL (insn) = loop->start_label; | |
4323 | LABEL_NUSES (loop->start_label)++; | |
4324 | delete_insn (loop->loop_end); | |
4325 | } | |
4326 | ||
4327 | /* A callback for the hw-doloop pass. This function examines INSN; if | |
4328 | it is a doloop_end pattern we recognize, return the reg rtx for the | |
4329 | loop counter. Otherwise, return NULL_RTX. */ | |
4330 | ||
4331 | static rtx | |
4332 | hwloop_pattern_reg (rtx_insn *insn) | |
4333 | { | |
4334 | rtx reg; | |
4335 | ||
4336 | if (!JUMP_P (insn) || recog_memoized (insn) != CODE_FOR_loop_end) | |
4337 | return NULL_RTX; | |
4338 | ||
4339 | reg = SET_DEST (XVECEXP (PATTERN (insn), 0, 1)); | |
4340 | if (!REG_P (reg)) | |
4341 | return NULL_RTX; | |
4342 | ||
4343 | return reg; | |
4344 | } | |
4345 | ||
4346 | ||
4347 | static struct hw_doloop_hooks xtensa_doloop_hooks = | |
4348 | { | |
4349 | hwloop_pattern_reg, | |
4350 | hwloop_optimize, | |
4351 | hwloop_fail | |
4352 | }; | |
4353 | ||
4354 | /* Run from machine_dependent_reorg, this pass looks for doloop_end insns | |
4355 | and tries to rewrite the RTL of these loops so that proper Xtensa | |
4356 | hardware loops are generated. */ | |
4357 | ||
4358 | static void | |
4359 | xtensa_reorg_loops (void) | |
4360 | { | |
1a711a0b MF |
4361 | if (TARGET_LOOPS) |
4362 | reorg_loops (false, &xtensa_doloop_hooks); | |
c6836000 | 4363 | } |
6383386a FY |
4364 | |
4365 | /* Implement the TARGET_MACHINE_DEPENDENT_REORG pass. */ | |
4366 | ||
4367 | static void | |
4368 | xtensa_reorg (void) | |
4369 | { | |
4370 | /* We are freeing block_for_insn in the toplev to keep compatibility | |
4371 | with old MDEP_REORGS that are not CFG based. Recompute it now. */ | |
4372 | compute_bb_for_insn (); | |
4373 | ||
4374 | df_analyze (); | |
4375 | ||
4376 | /* Doloop optimization. */ | |
4377 | xtensa_reorg_loops (); | |
4378 | } | |
4379 | ||
590e2636 MF |
4380 | /* Update register usage after having seen the compiler flags. */ |
4381 | ||
4382 | static void | |
4383 | xtensa_conditional_register_usage (void) | |
4384 | { | |
4385 | unsigned i, c_mask; | |
4386 | ||
4387 | c_mask = TARGET_WINDOWED_ABI ? (1 << 1) : (1 << 2); | |
4388 | ||
4389 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
4390 | { | |
4391 | /* Set/reset conditionally defined registers from | |
4392 | CALL_USED_REGISTERS initializer. */ | |
4393 | if (call_used_regs[i] > 1) | |
4394 | call_used_regs[i] = !!(call_used_regs[i] & c_mask); | |
4395 | } | |
4396 | ||
4397 | /* Remove hard FP register from the preferred reload registers set. */ | |
4398 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)RL_REGS], | |
4399 | HARD_FRAME_POINTER_REGNUM); | |
4400 | } | |
4401 | ||
4402 | /* Map hard register number to register class */ | |
4403 | ||
4404 | enum reg_class xtensa_regno_to_class (int regno) | |
4405 | { | |
4406 | static const enum reg_class regno_to_class[FIRST_PSEUDO_REGISTER] = | |
4407 | { | |
4408 | RL_REGS, SP_REG, RL_REGS, RL_REGS, | |
4409 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4410 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4411 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4412 | AR_REGS, AR_REGS, BR_REGS, | |
4413 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4414 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4415 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4416 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4417 | ACC_REG, | |
4418 | }; | |
4419 | ||
4420 | if (regno == HARD_FRAME_POINTER_REGNUM) | |
4421 | return GR_REGS; | |
4422 | else | |
4423 | return regno_to_class[regno]; | |
4424 | } | |
4425 | ||
58e17cf8 RS |
4426 | /* Implement TARGET_CONSTANT_ALIGNMENT. Align string constants and |
4427 | constructors to at least a word boundary. The typical use of this | |
4428 | macro is to increase alignment for string constants to be word | |
4429 | aligned so that 'strcpy' calls that copy constants can be done | |
4430 | inline. */ | |
4431 | ||
4432 | static HOST_WIDE_INT | |
4433 | xtensa_constant_alignment (const_tree exp, HOST_WIDE_INT align) | |
4434 | { | |
4435 | if ((TREE_CODE (exp) == STRING_CST || TREE_CODE (exp) == CONSTRUCTOR) | |
4436 | && !optimize_size) | |
4437 | return MAX (align, BITS_PER_WORD); | |
4438 | return align; | |
4439 | } | |
4440 | ||
f50c32fa MF |
4441 | static bool |
4442 | xtensa_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) | |
4443 | { | |
4444 | gcc_assert (from == ARG_POINTER_REGNUM || from == FRAME_POINTER_REGNUM); | |
4445 | ||
4446 | /* If we need a frame pointer, ARG_POINTER_REGNUM and FRAME_POINTER_REGNUM | |
4447 | can only eliminate to HARD_FRAME_POINTER_REGNUM. */ | |
4448 | return to == HARD_FRAME_POINTER_REGNUM | |
4449 | || (!frame_pointer_needed && to == STACK_POINTER_REGNUM); | |
4450 | } | |
4451 | ||
2a31c321 RS |
4452 | /* Implement TARGET_STARTING_FRAME_OFFSET. */ |
4453 | ||
4454 | static HOST_WIDE_INT | |
4455 | xtensa_starting_frame_offset (void) | |
4456 | { | |
4457 | if (FRAME_GROWS_DOWNWARD) | |
4458 | return 0; | |
4459 | return crtl->outgoing_args_size; | |
4460 | } | |
4461 | ||
8c9ee176 MF |
4462 | /* Implement TARGET_ASAN_SHADOW_OFFSET. */ |
4463 | ||
4464 | static unsigned HOST_WIDE_INT | |
4465 | xtensa_asan_shadow_offset (void) | |
4466 | { | |
4467 | return HOST_WIDE_INT_UC (0x10000000); | |
4468 | } | |
4469 | ||
b7641550 MF |
4470 | static rtx |
4471 | xtensa_delegitimize_address (rtx op) | |
4472 | { | |
4473 | switch (GET_CODE (op)) | |
4474 | { | |
4475 | case CONST: | |
4476 | return xtensa_delegitimize_address (XEXP (op, 0)); | |
4477 | ||
4478 | case UNSPEC: | |
4479 | if (XINT (op, 1) == UNSPEC_PLT) | |
4480 | return XVECEXP(op, 0, 0); | |
4481 | break; | |
4482 | ||
4483 | default: | |
4484 | break; | |
4485 | } | |
4486 | return op; | |
4487 | } | |
4488 | ||
e2500fed | 4489 | #include "gt-xtensa.h" |