Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/v850/v850.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Subroutines for insn-output.c for NEC V850 series |
| 2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, | |
|
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3 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 0 | 4 Contributed by Jeff Law (law@cygnus.com). |
| 5 | |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by | |
| 10 the Free Software Foundation; either version 3, or (at your option) | |
| 11 any later version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 #include "config.h" | |
| 23 #include "system.h" | |
| 24 #include "coretypes.h" | |
| 25 #include "tm.h" | |
| 26 #include "tree.h" | |
| 27 #include "rtl.h" | |
| 28 #include "regs.h" | |
| 29 #include "hard-reg-set.h" | |
| 30 #include "real.h" | |
| 31 #include "insn-config.h" | |
| 32 #include "conditions.h" | |
| 33 #include "output.h" | |
| 34 #include "insn-attr.h" | |
| 35 #include "flags.h" | |
| 36 #include "recog.h" | |
| 37 #include "expr.h" | |
| 38 #include "function.h" | |
| 39 #include "toplev.h" | |
| 40 #include "ggc.h" | |
| 41 #include "integrate.h" | |
| 42 #include "tm_p.h" | |
| 43 #include "target.h" | |
| 44 #include "target-def.h" | |
| 45 #include "df.h" | |
| 46 | |
| 47 #ifndef streq | |
| 48 #define streq(a,b) (strcmp (a, b) == 0) | |
| 49 #endif | |
| 50 | |
| 51 /* Function prototypes for stupid compilers: */ | |
| 52 static bool v850_handle_option (size_t, const char *, int); | |
| 53 static void const_double_split (rtx, HOST_WIDE_INT *, HOST_WIDE_INT *); | |
| 54 static int const_costs_int (HOST_WIDE_INT, int); | |
| 55 static int const_costs (rtx, enum rtx_code); | |
| 56 static bool v850_rtx_costs (rtx, int, int, int *, bool); | |
| 57 static void substitute_ep_register (rtx, rtx, int, int, rtx *, rtx *); | |
| 58 static void v850_reorg (void); | |
| 59 static int ep_memory_offset (enum machine_mode, int); | |
| 60 static void v850_set_data_area (tree, v850_data_area); | |
| 61 static tree v850_handle_interrupt_attribute (tree *, tree, tree, int, bool *); | |
| 62 static tree v850_handle_data_area_attribute (tree *, tree, tree, int, bool *); | |
| 63 static void v850_insert_attributes (tree, tree *); | |
| 64 static void v850_asm_init_sections (void); | |
| 65 static section *v850_select_section (tree, int, unsigned HOST_WIDE_INT); | |
| 66 static void v850_encode_data_area (tree, rtx); | |
| 67 static void v850_encode_section_info (tree, rtx, int); | |
| 68 static bool v850_return_in_memory (const_tree, const_tree); | |
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69 static rtx v850_function_value (const_tree, const_tree, bool); |
| 0 | 70 static void v850_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode, |
| 71 tree, int *, int); | |
| 72 static bool v850_pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode, | |
| 73 const_tree, bool); | |
| 74 static int v850_arg_partial_bytes (CUMULATIVE_ARGS *, enum machine_mode, | |
| 75 tree, bool); | |
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76 static bool v850_can_eliminate (const int, const int); |
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77 static void v850_asm_trampoline_template (FILE *); |
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78 static void v850_trampoline_init (rtx, tree, rtx); |
| 0 | 79 |
| 80 /* Information about the various small memory areas. */ | |
| 81 struct small_memory_info small_memory[ (int)SMALL_MEMORY_max ] = | |
| 82 { | |
| 83 /* name max physical max */ | |
| 84 { "tda", 0, 256 }, | |
| 85 { "sda", 0, 65536 }, | |
| 86 { "zda", 0, 32768 }, | |
| 87 }; | |
| 88 | |
| 89 /* Names of the various data areas used on the v850. */ | |
| 90 tree GHS_default_section_names [(int) COUNT_OF_GHS_SECTION_KINDS]; | |
| 91 tree GHS_current_section_names [(int) COUNT_OF_GHS_SECTION_KINDS]; | |
| 92 | |
| 93 /* Track the current data area set by the data area pragma (which | |
| 94 can be nested). Tested by check_default_data_area. */ | |
| 95 data_area_stack_element * data_area_stack = NULL; | |
| 96 | |
| 97 /* True if we don't need to check any more if the current | |
| 98 function is an interrupt handler. */ | |
| 99 static int v850_interrupt_cache_p = FALSE; | |
| 100 | |
| 101 /* Whether current function is an interrupt handler. */ | |
| 102 static int v850_interrupt_p = FALSE; | |
| 103 | |
| 104 static GTY(()) section *rosdata_section; | |
| 105 static GTY(()) section *rozdata_section; | |
| 106 static GTY(()) section *tdata_section; | |
| 107 static GTY(()) section *zdata_section; | |
| 108 static GTY(()) section *zbss_section; | |
| 109 | |
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110 /* V850 specific attributes. */ |
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111 |
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112 static const struct attribute_spec v850_attribute_table[] = |
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113 { |
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114 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ |
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115 { "interrupt_handler", 0, 0, true, false, false, v850_handle_interrupt_attribute }, |
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116 { "interrupt", 0, 0, true, false, false, v850_handle_interrupt_attribute }, |
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117 { "sda", 0, 0, true, false, false, v850_handle_data_area_attribute }, |
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118 { "tda", 0, 0, true, false, false, v850_handle_data_area_attribute }, |
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119 { "zda", 0, 0, true, false, false, v850_handle_data_area_attribute }, |
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120 { NULL, 0, 0, false, false, false, NULL } |
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121 }; |
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122 |
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123 |
| 0 | 124 /* Initialize the GCC target structure. */ |
| 125 #undef TARGET_ASM_ALIGNED_HI_OP | |
| 126 #define TARGET_ASM_ALIGNED_HI_OP "\t.hword\t" | |
| 127 | |
| 128 #undef TARGET_ATTRIBUTE_TABLE | |
| 129 #define TARGET_ATTRIBUTE_TABLE v850_attribute_table | |
| 130 | |
| 131 #undef TARGET_INSERT_ATTRIBUTES | |
| 132 #define TARGET_INSERT_ATTRIBUTES v850_insert_attributes | |
| 133 | |
| 134 #undef TARGET_ASM_SELECT_SECTION | |
| 135 #define TARGET_ASM_SELECT_SECTION v850_select_section | |
| 136 | |
| 137 /* The assembler supports switchable .bss sections, but | |
| 138 v850_select_section doesn't yet make use of them. */ | |
| 139 #undef TARGET_HAVE_SWITCHABLE_BSS_SECTIONS | |
| 140 #define TARGET_HAVE_SWITCHABLE_BSS_SECTIONS false | |
| 141 | |
| 142 #undef TARGET_ENCODE_SECTION_INFO | |
| 143 #define TARGET_ENCODE_SECTION_INFO v850_encode_section_info | |
| 144 | |
| 145 #undef TARGET_ASM_FILE_START_FILE_DIRECTIVE | |
| 146 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true | |
| 147 | |
| 148 #undef TARGET_DEFAULT_TARGET_FLAGS | |
| 149 #define TARGET_DEFAULT_TARGET_FLAGS (MASK_DEFAULT | MASK_APP_REGS) | |
| 150 #undef TARGET_HANDLE_OPTION | |
| 151 #define TARGET_HANDLE_OPTION v850_handle_option | |
| 152 | |
| 153 #undef TARGET_RTX_COSTS | |
| 154 #define TARGET_RTX_COSTS v850_rtx_costs | |
| 155 | |
| 156 #undef TARGET_ADDRESS_COST | |
| 157 #define TARGET_ADDRESS_COST hook_int_rtx_bool_0 | |
| 158 | |
| 159 #undef TARGET_MACHINE_DEPENDENT_REORG | |
| 160 #define TARGET_MACHINE_DEPENDENT_REORG v850_reorg | |
| 161 | |
| 162 #undef TARGET_PROMOTE_PROTOTYPES | |
| 163 #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true | |
| 164 | |
| 165 #undef TARGET_RETURN_IN_MEMORY | |
| 166 #define TARGET_RETURN_IN_MEMORY v850_return_in_memory | |
| 167 | |
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168 #undef TARGET_FUNCTION_VALUE |
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169 #define TARGET_FUNCTION_VALUE v850_function_value |
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170 |
| 0 | 171 #undef TARGET_PASS_BY_REFERENCE |
| 172 #define TARGET_PASS_BY_REFERENCE v850_pass_by_reference | |
| 173 | |
| 174 #undef TARGET_CALLEE_COPIES | |
| 175 #define TARGET_CALLEE_COPIES hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true | |
| 176 | |
| 177 #undef TARGET_SETUP_INCOMING_VARARGS | |
| 178 #define TARGET_SETUP_INCOMING_VARARGS v850_setup_incoming_varargs | |
| 179 | |
| 180 #undef TARGET_ARG_PARTIAL_BYTES | |
| 181 #define TARGET_ARG_PARTIAL_BYTES v850_arg_partial_bytes | |
| 182 | |
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183 #undef TARGET_CAN_ELIMINATE |
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184 #define TARGET_CAN_ELIMINATE v850_can_eliminate |
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185 |
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186 #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
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187 #define TARGET_ASM_TRAMPOLINE_TEMPLATE v850_asm_trampoline_template |
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188 #undef TARGET_TRAMPOLINE_INIT |
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189 #define TARGET_TRAMPOLINE_INIT v850_trampoline_init |
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190 |
| 0 | 191 struct gcc_target targetm = TARGET_INITIALIZER; |
| 192 | |
| 193 /* Set the maximum size of small memory area TYPE to the value given | |
| 194 by VALUE. Return true if VALUE was syntactically correct. VALUE | |
| 195 starts with the argument separator: either "-" or "=". */ | |
| 196 | |
| 197 static bool | |
| 198 v850_handle_memory_option (enum small_memory_type type, const char *value) | |
| 199 { | |
| 200 int i, size; | |
| 201 | |
| 202 if (*value != '-' && *value != '=') | |
| 203 return false; | |
| 204 | |
| 205 value++; | |
| 206 for (i = 0; value[i]; i++) | |
| 207 if (!ISDIGIT (value[i])) | |
| 208 return false; | |
| 209 | |
| 210 size = atoi (value); | |
| 211 if (size > small_memory[type].physical_max) | |
| 212 error ("value passed to %<-m%s%> is too large", small_memory[type].name); | |
| 213 else | |
| 214 small_memory[type].max = size; | |
| 215 return true; | |
| 216 } | |
| 217 | |
| 218 /* Implement TARGET_HANDLE_OPTION. */ | |
| 219 | |
| 220 static bool | |
| 221 v850_handle_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED) | |
| 222 { | |
| 223 switch (code) | |
| 224 { | |
| 225 case OPT_mspace: | |
| 226 target_flags |= MASK_EP | MASK_PROLOG_FUNCTION; | |
| 227 return true; | |
| 228 | |
| 229 case OPT_mv850: | |
| 230 target_flags &= ~(MASK_CPU ^ MASK_V850); | |
| 231 return true; | |
| 232 | |
| 233 case OPT_mv850e: | |
| 234 case OPT_mv850e1: | |
| 235 target_flags &= ~(MASK_CPU ^ MASK_V850E); | |
| 236 return true; | |
| 237 | |
| 238 case OPT_mtda: | |
| 239 return v850_handle_memory_option (SMALL_MEMORY_TDA, arg); | |
| 240 | |
| 241 case OPT_msda: | |
| 242 return v850_handle_memory_option (SMALL_MEMORY_SDA, arg); | |
| 243 | |
| 244 case OPT_mzda: | |
| 245 return v850_handle_memory_option (SMALL_MEMORY_ZDA, arg); | |
| 246 | |
| 247 default: | |
| 248 return true; | |
| 249 } | |
| 250 } | |
| 251 | |
| 252 static bool | |
| 253 v850_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED, | |
| 254 enum machine_mode mode, const_tree type, | |
| 255 bool named ATTRIBUTE_UNUSED) | |
| 256 { | |
| 257 unsigned HOST_WIDE_INT size; | |
| 258 | |
| 259 if (type) | |
| 260 size = int_size_in_bytes (type); | |
| 261 else | |
| 262 size = GET_MODE_SIZE (mode); | |
| 263 | |
| 264 return size > 8; | |
| 265 } | |
| 266 | |
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267 /* Return an RTX to represent where an argument with mode MODE |
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268 and type TYPE will be passed to a function. If the result |
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269 is NULL_RTX, the argument will be pushed. */ |
| 0 | 270 |
| 271 rtx | |
| 272 function_arg (CUMULATIVE_ARGS * cum, | |
| 273 enum machine_mode mode, | |
| 274 tree type, | |
| 275 int named) | |
| 276 { | |
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277 rtx result = NULL_RTX; |
| 0 | 278 int size, align; |
| 279 | |
| 280 if (TARGET_GHS && !named) | |
| 281 return NULL_RTX; | |
| 282 | |
| 283 if (mode == BLKmode) | |
| 284 size = int_size_in_bytes (type); | |
| 285 else | |
| 286 size = GET_MODE_SIZE (mode); | |
| 287 | |
| 288 if (size < 1) | |
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289 { |
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290 /* Once we have stopped using argument registers, do not start up again. */ |
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291 cum->nbytes = 4 * UNITS_PER_WORD; |
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292 return NULL_RTX; |
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293 } |
| 0 | 294 |
| 295 if (type) | |
| 296 align = TYPE_ALIGN (type) / BITS_PER_UNIT; | |
| 297 else | |
| 298 align = size; | |
| 299 | |
| 300 cum->nbytes = (cum->nbytes + align - 1) &~(align - 1); | |
| 301 | |
| 302 if (cum->nbytes > 4 * UNITS_PER_WORD) | |
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303 return NULL_RTX; |
| 0 | 304 |
| 305 if (type == NULL_TREE | |
| 306 && cum->nbytes + size > 4 * UNITS_PER_WORD) | |
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307 return NULL_RTX; |
| 0 | 308 |
| 309 switch (cum->nbytes / UNITS_PER_WORD) | |
| 310 { | |
| 311 case 0: | |
| 312 result = gen_rtx_REG (mode, 6); | |
| 313 break; | |
| 314 case 1: | |
| 315 result = gen_rtx_REG (mode, 7); | |
| 316 break; | |
| 317 case 2: | |
| 318 result = gen_rtx_REG (mode, 8); | |
| 319 break; | |
| 320 case 3: | |
| 321 result = gen_rtx_REG (mode, 9); | |
| 322 break; | |
| 323 default: | |
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324 result = NULL_RTX; |
| 0 | 325 } |
| 326 | |
| 327 return result; | |
| 328 } | |
| 329 | |
| 330 | |
| 331 /* Return the number of bytes which must be put into registers | |
| 332 for values which are part in registers and part in memory. */ | |
| 333 | |
| 334 static int | |
| 335 v850_arg_partial_bytes (CUMULATIVE_ARGS * cum, enum machine_mode mode, | |
| 336 tree type, bool named) | |
| 337 { | |
| 338 int size, align; | |
| 339 | |
| 340 if (TARGET_GHS && !named) | |
| 341 return 0; | |
| 342 | |
| 343 if (mode == BLKmode) | |
| 344 size = int_size_in_bytes (type); | |
| 345 else | |
| 346 size = GET_MODE_SIZE (mode); | |
| 347 | |
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348 if (size < 1) |
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349 size = 1; |
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350 |
| 0 | 351 if (type) |
| 352 align = TYPE_ALIGN (type) / BITS_PER_UNIT; | |
| 353 else | |
| 354 align = size; | |
| 355 | |
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356 cum->nbytes = (cum->nbytes + align - 1) & ~ (align - 1); |
| 0 | 357 |
| 358 if (cum->nbytes > 4 * UNITS_PER_WORD) | |
| 359 return 0; | |
| 360 | |
| 361 if (cum->nbytes + size <= 4 * UNITS_PER_WORD) | |
| 362 return 0; | |
| 363 | |
| 364 if (type == NULL_TREE | |
| 365 && cum->nbytes + size > 4 * UNITS_PER_WORD) | |
| 366 return 0; | |
| 367 | |
| 368 return 4 * UNITS_PER_WORD - cum->nbytes; | |
| 369 } | |
| 370 | |
| 371 | |
| 372 /* Return the high and low words of a CONST_DOUBLE */ | |
| 373 | |
| 374 static void | |
| 375 const_double_split (rtx x, HOST_WIDE_INT * p_high, HOST_WIDE_INT * p_low) | |
| 376 { | |
| 377 if (GET_CODE (x) == CONST_DOUBLE) | |
| 378 { | |
| 379 long t[2]; | |
| 380 REAL_VALUE_TYPE rv; | |
| 381 | |
| 382 switch (GET_MODE (x)) | |
| 383 { | |
| 384 case DFmode: | |
| 385 REAL_VALUE_FROM_CONST_DOUBLE (rv, x); | |
| 386 REAL_VALUE_TO_TARGET_DOUBLE (rv, t); | |
| 387 *p_high = t[1]; /* since v850 is little endian */ | |
| 388 *p_low = t[0]; /* high is second word */ | |
| 389 return; | |
| 390 | |
| 391 case SFmode: | |
| 392 REAL_VALUE_FROM_CONST_DOUBLE (rv, x); | |
| 393 REAL_VALUE_TO_TARGET_SINGLE (rv, *p_high); | |
| 394 *p_low = 0; | |
| 395 return; | |
| 396 | |
| 397 case VOIDmode: | |
| 398 case DImode: | |
| 399 *p_high = CONST_DOUBLE_HIGH (x); | |
| 400 *p_low = CONST_DOUBLE_LOW (x); | |
| 401 return; | |
| 402 | |
| 403 default: | |
| 404 break; | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 fatal_insn ("const_double_split got a bad insn:", x); | |
| 409 } | |
| 410 | |
| 411 | |
| 412 /* Return the cost of the rtx R with code CODE. */ | |
| 413 | |
| 414 static int | |
| 415 const_costs_int (HOST_WIDE_INT value, int zero_cost) | |
| 416 { | |
| 417 if (CONST_OK_FOR_I (value)) | |
| 418 return zero_cost; | |
| 419 else if (CONST_OK_FOR_J (value)) | |
| 420 return 1; | |
| 421 else if (CONST_OK_FOR_K (value)) | |
| 422 return 2; | |
| 423 else | |
| 424 return 4; | |
| 425 } | |
| 426 | |
| 427 static int | |
| 428 const_costs (rtx r, enum rtx_code c) | |
| 429 { | |
| 430 HOST_WIDE_INT high, low; | |
| 431 | |
| 432 switch (c) | |
| 433 { | |
| 434 case CONST_INT: | |
| 435 return const_costs_int (INTVAL (r), 0); | |
| 436 | |
| 437 case CONST_DOUBLE: | |
| 438 const_double_split (r, &high, &low); | |
| 439 if (GET_MODE (r) == SFmode) | |
| 440 return const_costs_int (high, 1); | |
| 441 else | |
| 442 return const_costs_int (high, 1) + const_costs_int (low, 1); | |
| 443 | |
| 444 case SYMBOL_REF: | |
| 445 case LABEL_REF: | |
| 446 case CONST: | |
| 447 return 2; | |
| 448 | |
| 449 case HIGH: | |
| 450 return 1; | |
| 451 | |
| 452 default: | |
| 453 return 4; | |
| 454 } | |
| 455 } | |
| 456 | |
| 457 static bool | |
| 458 v850_rtx_costs (rtx x, | |
|
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459 int codearg, |
| 0 | 460 int outer_code ATTRIBUTE_UNUSED, |
| 461 int * total, bool speed) | |
| 462 { | |
|
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463 enum rtx_code code = (enum rtx_code) codearg; |
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464 |
| 0 | 465 switch (code) |
| 466 { | |
| 467 case CONST_INT: | |
| 468 case CONST_DOUBLE: | |
| 469 case CONST: | |
| 470 case SYMBOL_REF: | |
| 471 case LABEL_REF: | |
| 472 *total = COSTS_N_INSNS (const_costs (x, code)); | |
| 473 return true; | |
| 474 | |
| 475 case MOD: | |
| 476 case DIV: | |
| 477 case UMOD: | |
| 478 case UDIV: | |
| 479 if (TARGET_V850E && !speed) | |
| 480 *total = 6; | |
| 481 else | |
| 482 *total = 60; | |
| 483 return true; | |
| 484 | |
| 485 case MULT: | |
| 486 if (TARGET_V850E | |
| 487 && ( GET_MODE (x) == SImode | |
| 488 || GET_MODE (x) == HImode | |
| 489 || GET_MODE (x) == QImode)) | |
| 490 { | |
| 491 if (GET_CODE (XEXP (x, 1)) == REG) | |
| 492 *total = 4; | |
| 493 else if (GET_CODE (XEXP (x, 1)) == CONST_INT) | |
| 494 { | |
| 495 if (CONST_OK_FOR_O (INTVAL (XEXP (x, 1)))) | |
| 496 *total = 6; | |
| 497 else if (CONST_OK_FOR_K (INTVAL (XEXP (x, 1)))) | |
| 498 *total = 10; | |
| 499 } | |
| 500 } | |
| 501 else | |
| 502 *total = 20; | |
| 503 return true; | |
| 504 | |
|
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505 case ZERO_EXTRACT: |
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506 if (outer_code == COMPARE) |
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507 *total = 0; |
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508 return false; |
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509 |
| 0 | 510 default: |
| 511 return false; | |
| 512 } | |
| 513 } | |
| 514 | |
| 515 /* Print operand X using operand code CODE to assembly language output file | |
| 516 FILE. */ | |
| 517 | |
| 518 void | |
| 519 print_operand (FILE * file, rtx x, int code) | |
| 520 { | |
| 521 HOST_WIDE_INT high, low; | |
| 522 | |
| 523 switch (code) | |
| 524 { | |
| 525 case 'c': | |
| 526 /* We use 'c' operands with symbols for .vtinherit */ | |
| 527 if (GET_CODE (x) == SYMBOL_REF) | |
| 528 { | |
| 529 output_addr_const(file, x); | |
| 530 break; | |
| 531 } | |
| 532 /* fall through */ | |
| 533 case 'b': | |
| 534 case 'B': | |
| 535 case 'C': | |
| 536 switch ((code == 'B' || code == 'C') | |
| 537 ? reverse_condition (GET_CODE (x)) : GET_CODE (x)) | |
| 538 { | |
| 539 case NE: | |
| 540 if (code == 'c' || code == 'C') | |
| 541 fprintf (file, "nz"); | |
| 542 else | |
| 543 fprintf (file, "ne"); | |
| 544 break; | |
| 545 case EQ: | |
| 546 if (code == 'c' || code == 'C') | |
| 547 fprintf (file, "z"); | |
| 548 else | |
| 549 fprintf (file, "e"); | |
| 550 break; | |
| 551 case GE: | |
| 552 fprintf (file, "ge"); | |
| 553 break; | |
| 554 case GT: | |
| 555 fprintf (file, "gt"); | |
| 556 break; | |
| 557 case LE: | |
| 558 fprintf (file, "le"); | |
| 559 break; | |
| 560 case LT: | |
| 561 fprintf (file, "lt"); | |
| 562 break; | |
| 563 case GEU: | |
| 564 fprintf (file, "nl"); | |
| 565 break; | |
| 566 case GTU: | |
| 567 fprintf (file, "h"); | |
| 568 break; | |
| 569 case LEU: | |
| 570 fprintf (file, "nh"); | |
| 571 break; | |
| 572 case LTU: | |
| 573 fprintf (file, "l"); | |
| 574 break; | |
| 575 default: | |
| 576 gcc_unreachable (); | |
| 577 } | |
| 578 break; | |
| 579 case 'F': /* high word of CONST_DOUBLE */ | |
| 580 switch (GET_CODE (x)) | |
| 581 { | |
| 582 case CONST_INT: | |
| 583 fprintf (file, "%d", (INTVAL (x) >= 0) ? 0 : -1); | |
| 584 break; | |
| 585 | |
| 586 case CONST_DOUBLE: | |
| 587 const_double_split (x, &high, &low); | |
| 588 fprintf (file, "%ld", (long) high); | |
| 589 break; | |
| 590 | |
| 591 default: | |
| 592 gcc_unreachable (); | |
| 593 } | |
| 594 break; | |
| 595 case 'G': /* low word of CONST_DOUBLE */ | |
| 596 switch (GET_CODE (x)) | |
| 597 { | |
| 598 case CONST_INT: | |
| 599 fprintf (file, "%ld", (long) INTVAL (x)); | |
| 600 break; | |
| 601 | |
| 602 case CONST_DOUBLE: | |
| 603 const_double_split (x, &high, &low); | |
| 604 fprintf (file, "%ld", (long) low); | |
| 605 break; | |
| 606 | |
| 607 default: | |
| 608 gcc_unreachable (); | |
| 609 } | |
| 610 break; | |
| 611 case 'L': | |
| 612 fprintf (file, "%d\n", (int)(INTVAL (x) & 0xffff)); | |
| 613 break; | |
| 614 case 'M': | |
| 615 fprintf (file, "%d", exact_log2 (INTVAL (x))); | |
| 616 break; | |
| 617 case 'O': | |
| 618 gcc_assert (special_symbolref_operand (x, VOIDmode)); | |
| 619 | |
| 620 if (GET_CODE (x) == CONST) | |
| 621 x = XEXP (XEXP (x, 0), 0); | |
| 622 else | |
| 623 gcc_assert (GET_CODE (x) == SYMBOL_REF); | |
| 624 | |
| 625 if (SYMBOL_REF_ZDA_P (x)) | |
| 626 fprintf (file, "zdaoff"); | |
| 627 else if (SYMBOL_REF_SDA_P (x)) | |
| 628 fprintf (file, "sdaoff"); | |
| 629 else if (SYMBOL_REF_TDA_P (x)) | |
| 630 fprintf (file, "tdaoff"); | |
| 631 else | |
| 632 gcc_unreachable (); | |
| 633 break; | |
| 634 case 'P': | |
| 635 gcc_assert (special_symbolref_operand (x, VOIDmode)); | |
| 636 output_addr_const (file, x); | |
| 637 break; | |
| 638 case 'Q': | |
| 639 gcc_assert (special_symbolref_operand (x, VOIDmode)); | |
| 640 | |
| 641 if (GET_CODE (x) == CONST) | |
| 642 x = XEXP (XEXP (x, 0), 0); | |
| 643 else | |
| 644 gcc_assert (GET_CODE (x) == SYMBOL_REF); | |
| 645 | |
| 646 if (SYMBOL_REF_ZDA_P (x)) | |
| 647 fprintf (file, "r0"); | |
| 648 else if (SYMBOL_REF_SDA_P (x)) | |
| 649 fprintf (file, "gp"); | |
| 650 else if (SYMBOL_REF_TDA_P (x)) | |
| 651 fprintf (file, "ep"); | |
| 652 else | |
| 653 gcc_unreachable (); | |
| 654 break; | |
| 655 case 'R': /* 2nd word of a double. */ | |
| 656 switch (GET_CODE (x)) | |
| 657 { | |
| 658 case REG: | |
| 659 fprintf (file, reg_names[REGNO (x) + 1]); | |
| 660 break; | |
| 661 case MEM: | |
| 662 x = XEXP (adjust_address (x, SImode, 4), 0); | |
| 663 print_operand_address (file, x); | |
| 664 if (GET_CODE (x) == CONST_INT) | |
| 665 fprintf (file, "[r0]"); | |
| 666 break; | |
| 667 | |
| 668 default: | |
| 669 break; | |
| 670 } | |
| 671 break; | |
| 672 case 'S': | |
| 673 { | |
| 674 /* If it's a reference to a TDA variable, use sst/sld vs. st/ld. */ | |
| 675 if (GET_CODE (x) == MEM && ep_memory_operand (x, GET_MODE (x), FALSE)) | |
| 676 fputs ("s", file); | |
| 677 | |
| 678 break; | |
| 679 } | |
| 680 case 'T': | |
| 681 { | |
| 682 /* Like an 'S' operand above, but for unsigned loads only. */ | |
| 683 if (GET_CODE (x) == MEM && ep_memory_operand (x, GET_MODE (x), TRUE)) | |
| 684 fputs ("s", file); | |
| 685 | |
| 686 break; | |
| 687 } | |
| 688 case 'W': /* print the instruction suffix */ | |
| 689 switch (GET_MODE (x)) | |
| 690 { | |
| 691 default: | |
| 692 gcc_unreachable (); | |
| 693 | |
| 694 case QImode: fputs (".b", file); break; | |
| 695 case HImode: fputs (".h", file); break; | |
| 696 case SImode: fputs (".w", file); break; | |
| 697 case SFmode: fputs (".w", file); break; | |
| 698 } | |
| 699 break; | |
| 700 case '.': /* register r0 */ | |
| 701 fputs (reg_names[0], file); | |
| 702 break; | |
| 703 case 'z': /* reg or zero */ | |
| 704 if (GET_CODE (x) == REG) | |
| 705 fputs (reg_names[REGNO (x)], file); | |
| 706 else | |
| 707 { | |
| 708 gcc_assert (x == const0_rtx); | |
| 709 fputs (reg_names[0], file); | |
| 710 } | |
| 711 break; | |
| 712 default: | |
| 713 switch (GET_CODE (x)) | |
| 714 { | |
| 715 case MEM: | |
| 716 if (GET_CODE (XEXP (x, 0)) == CONST_INT) | |
| 717 output_address (gen_rtx_PLUS (SImode, gen_rtx_REG (SImode, 0), | |
| 718 XEXP (x, 0))); | |
| 719 else | |
| 720 output_address (XEXP (x, 0)); | |
| 721 break; | |
| 722 | |
| 723 case REG: | |
| 724 fputs (reg_names[REGNO (x)], file); | |
| 725 break; | |
| 726 case SUBREG: | |
| 727 fputs (reg_names[subreg_regno (x)], file); | |
| 728 break; | |
| 729 case CONST_INT: | |
| 730 case SYMBOL_REF: | |
| 731 case CONST: | |
| 732 case LABEL_REF: | |
| 733 case CODE_LABEL: | |
| 734 print_operand_address (file, x); | |
| 735 break; | |
| 736 default: | |
| 737 gcc_unreachable (); | |
| 738 } | |
| 739 break; | |
| 740 | |
| 741 } | |
| 742 } | |
| 743 | |
| 744 | |
| 745 /* Output assembly language output for the address ADDR to FILE. */ | |
| 746 | |
| 747 void | |
| 748 print_operand_address (FILE * file, rtx addr) | |
| 749 { | |
| 750 switch (GET_CODE (addr)) | |
| 751 { | |
| 752 case REG: | |
| 753 fprintf (file, "0["); | |
| 754 print_operand (file, addr, 0); | |
| 755 fprintf (file, "]"); | |
| 756 break; | |
| 757 case LO_SUM: | |
| 758 if (GET_CODE (XEXP (addr, 0)) == REG) | |
| 759 { | |
| 760 /* reg,foo */ | |
| 761 fprintf (file, "lo("); | |
| 762 print_operand (file, XEXP (addr, 1), 0); | |
| 763 fprintf (file, ")["); | |
| 764 print_operand (file, XEXP (addr, 0), 0); | |
| 765 fprintf (file, "]"); | |
| 766 } | |
| 767 break; | |
| 768 case PLUS: | |
| 769 if (GET_CODE (XEXP (addr, 0)) == REG | |
| 770 || GET_CODE (XEXP (addr, 0)) == SUBREG) | |
| 771 { | |
| 772 /* reg,foo */ | |
| 773 print_operand (file, XEXP (addr, 1), 0); | |
| 774 fprintf (file, "["); | |
| 775 print_operand (file, XEXP (addr, 0), 0); | |
| 776 fprintf (file, "]"); | |
| 777 } | |
| 778 else | |
| 779 { | |
| 780 print_operand (file, XEXP (addr, 0), 0); | |
| 781 fprintf (file, "+"); | |
| 782 print_operand (file, XEXP (addr, 1), 0); | |
| 783 } | |
| 784 break; | |
| 785 case SYMBOL_REF: | |
| 786 { | |
| 787 const char *off_name = NULL; | |
| 788 const char *reg_name = NULL; | |
| 789 | |
| 790 if (SYMBOL_REF_ZDA_P (addr)) | |
| 791 { | |
| 792 off_name = "zdaoff"; | |
| 793 reg_name = "r0"; | |
| 794 } | |
| 795 else if (SYMBOL_REF_SDA_P (addr)) | |
| 796 { | |
| 797 off_name = "sdaoff"; | |
| 798 reg_name = "gp"; | |
| 799 } | |
| 800 else if (SYMBOL_REF_TDA_P (addr)) | |
| 801 { | |
| 802 off_name = "tdaoff"; | |
| 803 reg_name = "ep"; | |
| 804 } | |
| 805 | |
| 806 if (off_name) | |
| 807 fprintf (file, "%s(", off_name); | |
| 808 output_addr_const (file, addr); | |
| 809 if (reg_name) | |
| 810 fprintf (file, ")[%s]", reg_name); | |
| 811 } | |
| 812 break; | |
| 813 case CONST: | |
| 814 if (special_symbolref_operand (addr, VOIDmode)) | |
| 815 { | |
| 816 rtx x = XEXP (XEXP (addr, 0), 0); | |
| 817 const char *off_name; | |
| 818 const char *reg_name; | |
| 819 | |
| 820 if (SYMBOL_REF_ZDA_P (x)) | |
| 821 { | |
| 822 off_name = "zdaoff"; | |
| 823 reg_name = "r0"; | |
| 824 } | |
| 825 else if (SYMBOL_REF_SDA_P (x)) | |
| 826 { | |
| 827 off_name = "sdaoff"; | |
| 828 reg_name = "gp"; | |
| 829 } | |
| 830 else if (SYMBOL_REF_TDA_P (x)) | |
| 831 { | |
| 832 off_name = "tdaoff"; | |
| 833 reg_name = "ep"; | |
| 834 } | |
| 835 else | |
| 836 gcc_unreachable (); | |
| 837 | |
| 838 fprintf (file, "%s(", off_name); | |
| 839 output_addr_const (file, addr); | |
| 840 fprintf (file, ")[%s]", reg_name); | |
| 841 } | |
| 842 else | |
| 843 output_addr_const (file, addr); | |
| 844 break; | |
| 845 default: | |
| 846 output_addr_const (file, addr); | |
| 847 break; | |
| 848 } | |
| 849 } | |
| 850 | |
| 851 /* When assemble_integer is used to emit the offsets for a switch | |
| 852 table it can encounter (TRUNCATE:HI (MINUS:SI (LABEL_REF:SI) (LABEL_REF:SI))). | |
| 853 output_addr_const will normally barf at this, but it is OK to omit | |
| 854 the truncate and just emit the difference of the two labels. The | |
| 855 .hword directive will automatically handle the truncation for us. | |
| 856 | |
| 857 Returns 1 if rtx was handled, 0 otherwise. */ | |
| 858 | |
| 859 int | |
| 860 v850_output_addr_const_extra (FILE * file, rtx x) | |
| 861 { | |
| 862 if (GET_CODE (x) != TRUNCATE) | |
| 863 return 0; | |
| 864 | |
| 865 x = XEXP (x, 0); | |
| 866 | |
| 867 /* We must also handle the case where the switch table was passed a | |
| 868 constant value and so has been collapsed. In this case the first | |
| 869 label will have been deleted. In such a case it is OK to emit | |
| 870 nothing, since the table will not be used. | |
| 871 (cf gcc.c-torture/compile/990801-1.c). */ | |
| 872 if (GET_CODE (x) == MINUS | |
| 873 && GET_CODE (XEXP (x, 0)) == LABEL_REF | |
| 874 && GET_CODE (XEXP (XEXP (x, 0), 0)) == CODE_LABEL | |
| 875 && INSN_DELETED_P (XEXP (XEXP (x, 0), 0))) | |
| 876 return 1; | |
| 877 | |
| 878 output_addr_const (file, x); | |
| 879 return 1; | |
| 880 } | |
| 881 | |
| 882 /* Return appropriate code to load up a 1, 2, or 4 integer/floating | |
| 883 point value. */ | |
| 884 | |
| 885 const char * | |
| 886 output_move_single (rtx * operands) | |
| 887 { | |
| 888 rtx dst = operands[0]; | |
| 889 rtx src = operands[1]; | |
| 890 | |
| 891 if (REG_P (dst)) | |
| 892 { | |
| 893 if (REG_P (src)) | |
| 894 return "mov %1,%0"; | |
| 895 | |
| 896 else if (GET_CODE (src) == CONST_INT) | |
| 897 { | |
| 898 HOST_WIDE_INT value = INTVAL (src); | |
| 899 | |
| 900 if (CONST_OK_FOR_J (value)) /* Signed 5-bit immediate. */ | |
| 901 return "mov %1,%0"; | |
| 902 | |
| 903 else if (CONST_OK_FOR_K (value)) /* Signed 16-bit immediate. */ | |
| 904 return "movea lo(%1),%.,%0"; | |
| 905 | |
| 906 else if (CONST_OK_FOR_L (value)) /* Upper 16 bits were set. */ | |
| 907 return "movhi hi(%1),%.,%0"; | |
| 908 | |
| 909 /* A random constant. */ | |
| 910 else if (TARGET_V850E) | |
| 911 return "mov %1,%0"; | |
| 912 else | |
| 913 return "movhi hi(%1),%.,%0\n\tmovea lo(%1),%0,%0"; | |
| 914 } | |
| 915 | |
| 916 else if (GET_CODE (src) == CONST_DOUBLE && GET_MODE (src) == SFmode) | |
| 917 { | |
| 918 HOST_WIDE_INT high, low; | |
| 919 | |
| 920 const_double_split (src, &high, &low); | |
| 921 | |
| 922 if (CONST_OK_FOR_J (high)) /* Signed 5-bit immediate. */ | |
| 923 return "mov %F1,%0"; | |
| 924 | |
| 925 else if (CONST_OK_FOR_K (high)) /* Signed 16-bit immediate. */ | |
| 926 return "movea lo(%F1),%.,%0"; | |
| 927 | |
| 928 else if (CONST_OK_FOR_L (high)) /* Upper 16 bits were set. */ | |
| 929 return "movhi hi(%F1),%.,%0"; | |
| 930 | |
| 931 /* A random constant. */ | |
| 932 else if (TARGET_V850E) | |
| 933 return "mov %F1,%0"; | |
| 934 | |
| 935 else | |
| 936 return "movhi hi(%F1),%.,%0\n\tmovea lo(%F1),%0,%0"; | |
| 937 } | |
| 938 | |
| 939 else if (GET_CODE (src) == MEM) | |
| 940 return "%S1ld%W1 %1,%0"; | |
| 941 | |
| 942 else if (special_symbolref_operand (src, VOIDmode)) | |
| 943 return "movea %O1(%P1),%Q1,%0"; | |
| 944 | |
| 945 else if (GET_CODE (src) == LABEL_REF | |
| 946 || GET_CODE (src) == SYMBOL_REF | |
| 947 || GET_CODE (src) == CONST) | |
| 948 { | |
| 949 if (TARGET_V850E) | |
| 950 return "mov hilo(%1),%0"; | |
| 951 else | |
| 952 return "movhi hi(%1),%.,%0\n\tmovea lo(%1),%0,%0"; | |
| 953 } | |
| 954 | |
| 955 else if (GET_CODE (src) == HIGH) | |
| 956 return "movhi hi(%1),%.,%0"; | |
| 957 | |
| 958 else if (GET_CODE (src) == LO_SUM) | |
| 959 { | |
| 960 operands[2] = XEXP (src, 0); | |
| 961 operands[3] = XEXP (src, 1); | |
| 962 return "movea lo(%3),%2,%0"; | |
| 963 } | |
| 964 } | |
| 965 | |
| 966 else if (GET_CODE (dst) == MEM) | |
| 967 { | |
| 968 if (REG_P (src)) | |
| 969 return "%S0st%W0 %1,%0"; | |
| 970 | |
| 971 else if (GET_CODE (src) == CONST_INT && INTVAL (src) == 0) | |
| 972 return "%S0st%W0 %.,%0"; | |
| 973 | |
| 974 else if (GET_CODE (src) == CONST_DOUBLE | |
| 975 && CONST0_RTX (GET_MODE (dst)) == src) | |
| 976 return "%S0st%W0 %.,%0"; | |
| 977 } | |
| 978 | |
| 979 fatal_insn ("output_move_single:", gen_rtx_SET (VOIDmode, dst, src)); | |
| 980 return ""; | |
| 981 } | |
| 982 | |
| 983 | |
| 984 /* Return maximum offset supported for a short EP memory reference of mode | |
| 985 MODE and signedness UNSIGNEDP. */ | |
| 986 | |
| 987 static int | |
| 988 ep_memory_offset (enum machine_mode mode, int unsignedp ATTRIBUTE_UNUSED) | |
| 989 { | |
| 990 int max_offset = 0; | |
| 991 | |
| 992 switch (mode) | |
| 993 { | |
| 994 case QImode: | |
| 995 if (TARGET_SMALL_SLD) | |
| 996 max_offset = (1 << 4); | |
| 997 else if (TARGET_V850E | |
| 998 && ( ( unsignedp && ! TARGET_US_BIT_SET) | |
| 999 || (! unsignedp && TARGET_US_BIT_SET))) | |
| 1000 max_offset = (1 << 4); | |
| 1001 else | |
| 1002 max_offset = (1 << 7); | |
| 1003 break; | |
| 1004 | |
| 1005 case HImode: | |
| 1006 if (TARGET_SMALL_SLD) | |
| 1007 max_offset = (1 << 5); | |
| 1008 else if (TARGET_V850E | |
| 1009 && ( ( unsignedp && ! TARGET_US_BIT_SET) | |
| 1010 || (! unsignedp && TARGET_US_BIT_SET))) | |
| 1011 max_offset = (1 << 5); | |
| 1012 else | |
| 1013 max_offset = (1 << 8); | |
| 1014 break; | |
| 1015 | |
| 1016 case SImode: | |
| 1017 case SFmode: | |
| 1018 max_offset = (1 << 8); | |
| 1019 break; | |
| 1020 | |
| 1021 default: | |
| 1022 break; | |
| 1023 } | |
| 1024 | |
| 1025 return max_offset; | |
| 1026 } | |
| 1027 | |
| 1028 /* Return true if OP is a valid short EP memory reference */ | |
| 1029 | |
| 1030 int | |
| 1031 ep_memory_operand (rtx op, enum machine_mode mode, int unsigned_load) | |
| 1032 { | |
| 1033 rtx addr, op0, op1; | |
| 1034 int max_offset; | |
| 1035 int mask; | |
| 1036 | |
| 1037 /* If we are not using the EP register on a per-function basis | |
| 1038 then do not allow this optimization at all. This is to | |
| 1039 prevent the use of the SLD/SST instructions which cannot be | |
| 1040 guaranteed to work properly due to a hardware bug. */ | |
| 1041 if (!TARGET_EP) | |
| 1042 return FALSE; | |
| 1043 | |
| 1044 if (GET_CODE (op) != MEM) | |
| 1045 return FALSE; | |
| 1046 | |
| 1047 max_offset = ep_memory_offset (mode, unsigned_load); | |
| 1048 | |
| 1049 mask = GET_MODE_SIZE (mode) - 1; | |
| 1050 | |
| 1051 addr = XEXP (op, 0); | |
| 1052 if (GET_CODE (addr) == CONST) | |
| 1053 addr = XEXP (addr, 0); | |
| 1054 | |
| 1055 switch (GET_CODE (addr)) | |
| 1056 { | |
| 1057 default: | |
| 1058 break; | |
| 1059 | |
| 1060 case SYMBOL_REF: | |
| 1061 return SYMBOL_REF_TDA_P (addr); | |
| 1062 | |
| 1063 case REG: | |
| 1064 return REGNO (addr) == EP_REGNUM; | |
| 1065 | |
| 1066 case PLUS: | |
| 1067 op0 = XEXP (addr, 0); | |
| 1068 op1 = XEXP (addr, 1); | |
| 1069 if (GET_CODE (op1) == CONST_INT | |
| 1070 && INTVAL (op1) < max_offset | |
| 1071 && INTVAL (op1) >= 0 | |
| 1072 && (INTVAL (op1) & mask) == 0) | |
| 1073 { | |
| 1074 if (GET_CODE (op0) == REG && REGNO (op0) == EP_REGNUM) | |
| 1075 return TRUE; | |
| 1076 | |
| 1077 if (GET_CODE (op0) == SYMBOL_REF && SYMBOL_REF_TDA_P (op0)) | |
| 1078 return TRUE; | |
| 1079 } | |
| 1080 break; | |
| 1081 } | |
| 1082 | |
| 1083 return FALSE; | |
| 1084 } | |
| 1085 | |
| 1086 /* Substitute memory references involving a pointer, to use the ep pointer, | |
| 1087 taking care to save and preserve the ep. */ | |
| 1088 | |
| 1089 static void | |
| 1090 substitute_ep_register (rtx first_insn, | |
| 1091 rtx last_insn, | |
| 1092 int uses, | |
| 1093 int regno, | |
| 1094 rtx * p_r1, | |
| 1095 rtx * p_ep) | |
| 1096 { | |
| 1097 rtx reg = gen_rtx_REG (Pmode, regno); | |
| 1098 rtx insn; | |
| 1099 | |
| 1100 if (!*p_r1) | |
| 1101 { | |
| 1102 df_set_regs_ever_live (1, true); | |
| 1103 *p_r1 = gen_rtx_REG (Pmode, 1); | |
| 1104 *p_ep = gen_rtx_REG (Pmode, 30); | |
| 1105 } | |
| 1106 | |
| 1107 if (TARGET_DEBUG) | |
| 1108 fprintf (stderr, "\ | |
| 1109 Saved %d bytes (%d uses of register %s) in function %s, starting as insn %d, ending at %d\n", | |
| 1110 2 * (uses - 3), uses, reg_names[regno], | |
| 1111 IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), | |
| 1112 INSN_UID (first_insn), INSN_UID (last_insn)); | |
| 1113 | |
| 1114 if (GET_CODE (first_insn) == NOTE) | |
| 1115 first_insn = next_nonnote_insn (first_insn); | |
| 1116 | |
| 1117 last_insn = next_nonnote_insn (last_insn); | |
| 1118 for (insn = first_insn; insn && insn != last_insn; insn = NEXT_INSN (insn)) | |
| 1119 { | |
| 1120 if (GET_CODE (insn) == INSN) | |
| 1121 { | |
| 1122 rtx pattern = single_set (insn); | |
| 1123 | |
| 1124 /* Replace the memory references. */ | |
| 1125 if (pattern) | |
| 1126 { | |
| 1127 rtx *p_mem; | |
| 1128 /* Memory operands are signed by default. */ | |
| 1129 int unsignedp = FALSE; | |
| 1130 | |
| 1131 if (GET_CODE (SET_DEST (pattern)) == MEM | |
| 1132 && GET_CODE (SET_SRC (pattern)) == MEM) | |
| 1133 p_mem = (rtx *)0; | |
| 1134 | |
| 1135 else if (GET_CODE (SET_DEST (pattern)) == MEM) | |
| 1136 p_mem = &SET_DEST (pattern); | |
| 1137 | |
| 1138 else if (GET_CODE (SET_SRC (pattern)) == MEM) | |
| 1139 p_mem = &SET_SRC (pattern); | |
| 1140 | |
| 1141 else if (GET_CODE (SET_SRC (pattern)) == SIGN_EXTEND | |
| 1142 && GET_CODE (XEXP (SET_SRC (pattern), 0)) == MEM) | |
| 1143 p_mem = &XEXP (SET_SRC (pattern), 0); | |
| 1144 | |
| 1145 else if (GET_CODE (SET_SRC (pattern)) == ZERO_EXTEND | |
| 1146 && GET_CODE (XEXP (SET_SRC (pattern), 0)) == MEM) | |
| 1147 { | |
| 1148 p_mem = &XEXP (SET_SRC (pattern), 0); | |
| 1149 unsignedp = TRUE; | |
| 1150 } | |
| 1151 else | |
| 1152 p_mem = (rtx *)0; | |
| 1153 | |
| 1154 if (p_mem) | |
| 1155 { | |
| 1156 rtx addr = XEXP (*p_mem, 0); | |
| 1157 | |
| 1158 if (GET_CODE (addr) == REG && REGNO (addr) == (unsigned) regno) | |
| 1159 *p_mem = change_address (*p_mem, VOIDmode, *p_ep); | |
| 1160 | |
| 1161 else if (GET_CODE (addr) == PLUS | |
| 1162 && GET_CODE (XEXP (addr, 0)) == REG | |
| 1163 && REGNO (XEXP (addr, 0)) == (unsigned) regno | |
| 1164 && GET_CODE (XEXP (addr, 1)) == CONST_INT | |
| 1165 && ((INTVAL (XEXP (addr, 1))) | |
| 1166 < ep_memory_offset (GET_MODE (*p_mem), | |
| 1167 unsignedp)) | |
| 1168 && ((INTVAL (XEXP (addr, 1))) >= 0)) | |
| 1169 *p_mem = change_address (*p_mem, VOIDmode, | |
| 1170 gen_rtx_PLUS (Pmode, | |
| 1171 *p_ep, | |
| 1172 XEXP (addr, 1))); | |
| 1173 } | |
| 1174 } | |
| 1175 } | |
| 1176 } | |
| 1177 | |
| 1178 /* Optimize back to back cases of ep <- r1 & r1 <- ep. */ | |
| 1179 insn = prev_nonnote_insn (first_insn); | |
| 1180 if (insn && GET_CODE (insn) == INSN | |
| 1181 && GET_CODE (PATTERN (insn)) == SET | |
| 1182 && SET_DEST (PATTERN (insn)) == *p_ep | |
| 1183 && SET_SRC (PATTERN (insn)) == *p_r1) | |
| 1184 delete_insn (insn); | |
| 1185 else | |
| 1186 emit_insn_before (gen_rtx_SET (Pmode, *p_r1, *p_ep), first_insn); | |
| 1187 | |
| 1188 emit_insn_before (gen_rtx_SET (Pmode, *p_ep, reg), first_insn); | |
| 1189 emit_insn_before (gen_rtx_SET (Pmode, *p_ep, *p_r1), last_insn); | |
| 1190 } | |
| 1191 | |
| 1192 | |
| 1193 /* TARGET_MACHINE_DEPENDENT_REORG. On the 850, we use it to implement | |
| 1194 the -mep mode to copy heavily used pointers to ep to use the implicit | |
| 1195 addressing. */ | |
| 1196 | |
| 1197 static void | |
| 1198 v850_reorg (void) | |
| 1199 { | |
| 1200 struct | |
| 1201 { | |
| 1202 int uses; | |
| 1203 rtx first_insn; | |
| 1204 rtx last_insn; | |
| 1205 } | |
| 1206 regs[FIRST_PSEUDO_REGISTER]; | |
| 1207 | |
| 1208 int i; | |
| 1209 int use_ep = FALSE; | |
| 1210 rtx r1 = NULL_RTX; | |
| 1211 rtx ep = NULL_RTX; | |
| 1212 rtx insn; | |
| 1213 rtx pattern; | |
| 1214 | |
| 1215 /* If not ep mode, just return now. */ | |
| 1216 if (!TARGET_EP) | |
| 1217 return; | |
| 1218 | |
| 1219 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 1220 { | |
| 1221 regs[i].uses = 0; | |
| 1222 regs[i].first_insn = NULL_RTX; | |
| 1223 regs[i].last_insn = NULL_RTX; | |
| 1224 } | |
| 1225 | |
| 1226 for (insn = get_insns (); insn != NULL_RTX; insn = NEXT_INSN (insn)) | |
| 1227 { | |
| 1228 switch (GET_CODE (insn)) | |
| 1229 { | |
| 1230 /* End of basic block */ | |
| 1231 default: | |
| 1232 if (!use_ep) | |
| 1233 { | |
| 1234 int max_uses = -1; | |
| 1235 int max_regno = -1; | |
| 1236 | |
| 1237 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 1238 { | |
| 1239 if (max_uses < regs[i].uses) | |
| 1240 { | |
| 1241 max_uses = regs[i].uses; | |
| 1242 max_regno = i; | |
| 1243 } | |
| 1244 } | |
| 1245 | |
| 1246 if (max_uses > 3) | |
| 1247 substitute_ep_register (regs[max_regno].first_insn, | |
| 1248 regs[max_regno].last_insn, | |
| 1249 max_uses, max_regno, &r1, &ep); | |
| 1250 } | |
| 1251 | |
| 1252 use_ep = FALSE; | |
| 1253 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 1254 { | |
| 1255 regs[i].uses = 0; | |
| 1256 regs[i].first_insn = NULL_RTX; | |
| 1257 regs[i].last_insn = NULL_RTX; | |
| 1258 } | |
| 1259 break; | |
| 1260 | |
| 1261 case NOTE: | |
| 1262 break; | |
| 1263 | |
| 1264 case INSN: | |
| 1265 pattern = single_set (insn); | |
| 1266 | |
| 1267 /* See if there are any memory references we can shorten */ | |
| 1268 if (pattern) | |
| 1269 { | |
| 1270 rtx src = SET_SRC (pattern); | |
| 1271 rtx dest = SET_DEST (pattern); | |
| 1272 rtx mem; | |
| 1273 /* Memory operands are signed by default. */ | |
| 1274 int unsignedp = FALSE; | |
| 1275 | |
| 1276 /* We might have (SUBREG (MEM)) here, so just get rid of the | |
| 1277 subregs to make this code simpler. */ | |
| 1278 if (GET_CODE (dest) == SUBREG | |
| 1279 && (GET_CODE (SUBREG_REG (dest)) == MEM | |
| 1280 || GET_CODE (SUBREG_REG (dest)) == REG)) | |
| 1281 alter_subreg (&dest); | |
| 1282 if (GET_CODE (src) == SUBREG | |
| 1283 && (GET_CODE (SUBREG_REG (src)) == MEM | |
| 1284 || GET_CODE (SUBREG_REG (src)) == REG)) | |
| 1285 alter_subreg (&src); | |
| 1286 | |
| 1287 if (GET_CODE (dest) == MEM && GET_CODE (src) == MEM) | |
| 1288 mem = NULL_RTX; | |
| 1289 | |
| 1290 else if (GET_CODE (dest) == MEM) | |
| 1291 mem = dest; | |
| 1292 | |
| 1293 else if (GET_CODE (src) == MEM) | |
| 1294 mem = src; | |
| 1295 | |
| 1296 else if (GET_CODE (src) == SIGN_EXTEND | |
| 1297 && GET_CODE (XEXP (src, 0)) == MEM) | |
| 1298 mem = XEXP (src, 0); | |
| 1299 | |
| 1300 else if (GET_CODE (src) == ZERO_EXTEND | |
| 1301 && GET_CODE (XEXP (src, 0)) == MEM) | |
| 1302 { | |
| 1303 mem = XEXP (src, 0); | |
| 1304 unsignedp = TRUE; | |
| 1305 } | |
| 1306 else | |
| 1307 mem = NULL_RTX; | |
| 1308 | |
| 1309 if (mem && ep_memory_operand (mem, GET_MODE (mem), unsignedp)) | |
| 1310 use_ep = TRUE; | |
| 1311 | |
| 1312 else if (!use_ep && mem | |
| 1313 && GET_MODE_SIZE (GET_MODE (mem)) <= UNITS_PER_WORD) | |
| 1314 { | |
| 1315 rtx addr = XEXP (mem, 0); | |
| 1316 int regno = -1; | |
| 1317 int short_p; | |
| 1318 | |
| 1319 if (GET_CODE (addr) == REG) | |
| 1320 { | |
| 1321 short_p = TRUE; | |
| 1322 regno = REGNO (addr); | |
| 1323 } | |
| 1324 | |
| 1325 else if (GET_CODE (addr) == PLUS | |
| 1326 && GET_CODE (XEXP (addr, 0)) == REG | |
| 1327 && GET_CODE (XEXP (addr, 1)) == CONST_INT | |
| 1328 && ((INTVAL (XEXP (addr, 1))) | |
| 1329 < ep_memory_offset (GET_MODE (mem), unsignedp)) | |
| 1330 && ((INTVAL (XEXP (addr, 1))) >= 0)) | |
| 1331 { | |
| 1332 short_p = TRUE; | |
| 1333 regno = REGNO (XEXP (addr, 0)); | |
| 1334 } | |
| 1335 | |
| 1336 else | |
| 1337 short_p = FALSE; | |
| 1338 | |
| 1339 if (short_p) | |
| 1340 { | |
| 1341 regs[regno].uses++; | |
| 1342 regs[regno].last_insn = insn; | |
| 1343 if (!regs[regno].first_insn) | |
| 1344 regs[regno].first_insn = insn; | |
| 1345 } | |
| 1346 } | |
| 1347 | |
| 1348 /* Loading up a register in the basic block zaps any savings | |
| 1349 for the register */ | |
| 1350 if (GET_CODE (dest) == REG) | |
| 1351 { | |
| 1352 enum machine_mode mode = GET_MODE (dest); | |
| 1353 int regno; | |
| 1354 int endregno; | |
| 1355 | |
| 1356 regno = REGNO (dest); | |
| 1357 endregno = regno + HARD_REGNO_NREGS (regno, mode); | |
| 1358 | |
| 1359 if (!use_ep) | |
| 1360 { | |
| 1361 /* See if we can use the pointer before this | |
| 1362 modification. */ | |
| 1363 int max_uses = -1; | |
| 1364 int max_regno = -1; | |
| 1365 | |
| 1366 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 1367 { | |
| 1368 if (max_uses < regs[i].uses) | |
| 1369 { | |
| 1370 max_uses = regs[i].uses; | |
| 1371 max_regno = i; | |
| 1372 } | |
| 1373 } | |
| 1374 | |
| 1375 if (max_uses > 3 | |
| 1376 && max_regno >= regno | |
| 1377 && max_regno < endregno) | |
| 1378 { | |
| 1379 substitute_ep_register (regs[max_regno].first_insn, | |
| 1380 regs[max_regno].last_insn, | |
| 1381 max_uses, max_regno, &r1, | |
| 1382 &ep); | |
| 1383 | |
| 1384 /* Since we made a substitution, zap all remembered | |
| 1385 registers. */ | |
| 1386 for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 1387 { | |
| 1388 regs[i].uses = 0; | |
| 1389 regs[i].first_insn = NULL_RTX; | |
| 1390 regs[i].last_insn = NULL_RTX; | |
| 1391 } | |
| 1392 } | |
| 1393 } | |
| 1394 | |
| 1395 for (i = regno; i < endregno; i++) | |
| 1396 { | |
| 1397 regs[i].uses = 0; | |
| 1398 regs[i].first_insn = NULL_RTX; | |
| 1399 regs[i].last_insn = NULL_RTX; | |
| 1400 } | |
| 1401 } | |
| 1402 } | |
| 1403 } | |
| 1404 } | |
| 1405 } | |
| 1406 | |
| 1407 | |
| 1408 /* # of registers saved by the interrupt handler. */ | |
| 1409 #define INTERRUPT_FIXED_NUM 4 | |
| 1410 | |
| 1411 /* # of bytes for registers saved by the interrupt handler. */ | |
| 1412 #define INTERRUPT_FIXED_SAVE_SIZE (4 * INTERRUPT_FIXED_NUM) | |
| 1413 | |
| 1414 /* # of registers saved in register parameter area. */ | |
| 1415 #define INTERRUPT_REGPARM_NUM 4 | |
| 1416 /* # of words saved for other registers. */ | |
| 1417 #define INTERRUPT_ALL_SAVE_NUM \ | |
| 1418 (30 - INTERRUPT_FIXED_NUM + INTERRUPT_REGPARM_NUM) | |
| 1419 | |
| 1420 #define INTERRUPT_ALL_SAVE_SIZE (4 * INTERRUPT_ALL_SAVE_NUM) | |
| 1421 | |
| 1422 int | |
| 1423 compute_register_save_size (long * p_reg_saved) | |
| 1424 { | |
| 1425 int size = 0; | |
| 1426 int i; | |
| 1427 int interrupt_handler = v850_interrupt_function_p (current_function_decl); | |
| 1428 int call_p = df_regs_ever_live_p (LINK_POINTER_REGNUM); | |
| 1429 long reg_saved = 0; | |
| 1430 | |
| 1431 /* Count the return pointer if we need to save it. */ | |
| 1432 if (crtl->profile && !call_p) | |
| 1433 { | |
| 1434 df_set_regs_ever_live (LINK_POINTER_REGNUM, true); | |
| 1435 call_p = 1; | |
| 1436 } | |
| 1437 | |
| 1438 /* Count space for the register saves. */ | |
| 1439 if (interrupt_handler) | |
| 1440 { | |
| 1441 for (i = 0; i <= 31; i++) | |
| 1442 switch (i) | |
| 1443 { | |
| 1444 default: | |
| 1445 if (df_regs_ever_live_p (i) || call_p) | |
| 1446 { | |
| 1447 size += 4; | |
| 1448 reg_saved |= 1L << i; | |
| 1449 } | |
| 1450 break; | |
| 1451 | |
| 1452 /* We don't save/restore r0 or the stack pointer */ | |
| 1453 case 0: | |
| 1454 case STACK_POINTER_REGNUM: | |
| 1455 break; | |
| 1456 | |
| 1457 /* For registers with fixed use, we save them, set them to the | |
| 1458 appropriate value, and then restore them. | |
| 1459 These registers are handled specially, so don't list them | |
| 1460 on the list of registers to save in the prologue. */ | |
| 1461 case 1: /* temp used to hold ep */ | |
| 1462 case 4: /* gp */ | |
| 1463 case 10: /* temp used to call interrupt save/restore */ | |
| 1464 case EP_REGNUM: /* ep */ | |
| 1465 size += 4; | |
| 1466 break; | |
| 1467 } | |
| 1468 } | |
| 1469 else | |
| 1470 { | |
| 1471 /* Find the first register that needs to be saved. */ | |
| 1472 for (i = 0; i <= 31; i++) | |
| 1473 if (df_regs_ever_live_p (i) && ((! call_used_regs[i]) | |
| 1474 || i == LINK_POINTER_REGNUM)) | |
| 1475 break; | |
| 1476 | |
| 1477 /* If it is possible that an out-of-line helper function might be | |
| 1478 used to generate the prologue for the current function, then we | |
| 1479 need to cover the possibility that such a helper function will | |
| 1480 be used, despite the fact that there might be gaps in the list of | |
| 1481 registers that need to be saved. To detect this we note that the | |
| 1482 helper functions always push at least register r29 (provided | |
| 1483 that the function is not an interrupt handler). */ | |
| 1484 | |
| 1485 if (TARGET_PROLOG_FUNCTION | |
| 1486 && (i == 2 || ((i >= 20) && (i < 30)))) | |
| 1487 { | |
| 1488 if (i == 2) | |
| 1489 { | |
| 1490 size += 4; | |
| 1491 reg_saved |= 1L << i; | |
| 1492 | |
| 1493 i = 20; | |
| 1494 } | |
| 1495 | |
| 1496 /* Helper functions save all registers between the starting | |
| 1497 register and the last register, regardless of whether they | |
| 1498 are actually used by the function or not. */ | |
| 1499 for (; i <= 29; i++) | |
| 1500 { | |
| 1501 size += 4; | |
| 1502 reg_saved |= 1L << i; | |
| 1503 } | |
| 1504 | |
| 1505 if (df_regs_ever_live_p (LINK_POINTER_REGNUM)) | |
| 1506 { | |
| 1507 size += 4; | |
| 1508 reg_saved |= 1L << LINK_POINTER_REGNUM; | |
| 1509 } | |
| 1510 } | |
| 1511 else | |
| 1512 { | |
| 1513 for (; i <= 31; i++) | |
| 1514 if (df_regs_ever_live_p (i) && ((! call_used_regs[i]) | |
| 1515 || i == LINK_POINTER_REGNUM)) | |
| 1516 { | |
| 1517 size += 4; | |
| 1518 reg_saved |= 1L << i; | |
| 1519 } | |
| 1520 } | |
| 1521 } | |
| 1522 | |
| 1523 if (p_reg_saved) | |
| 1524 *p_reg_saved = reg_saved; | |
| 1525 | |
| 1526 return size; | |
| 1527 } | |
| 1528 | |
| 1529 int | |
| 1530 compute_frame_size (int size, long * p_reg_saved) | |
| 1531 { | |
| 1532 return (size | |
| 1533 + compute_register_save_size (p_reg_saved) | |
| 1534 + crtl->outgoing_args_size); | |
| 1535 } | |
| 1536 | |
| 1537 | |
| 1538 void | |
| 1539 expand_prologue (void) | |
| 1540 { | |
| 1541 unsigned int i; | |
| 1542 int offset; | |
| 1543 unsigned int size = get_frame_size (); | |
| 1544 unsigned int actual_fsize; | |
| 1545 unsigned int init_stack_alloc = 0; | |
| 1546 rtx save_regs[32]; | |
| 1547 rtx save_all; | |
| 1548 unsigned int num_save; | |
| 1549 unsigned int default_stack; | |
| 1550 int code; | |
| 1551 int interrupt_handler = v850_interrupt_function_p (current_function_decl); | |
| 1552 long reg_saved = 0; | |
| 1553 | |
| 1554 actual_fsize = compute_frame_size (size, ®_saved); | |
| 1555 | |
| 1556 /* Save/setup global registers for interrupt functions right now. */ | |
| 1557 if (interrupt_handler) | |
| 1558 { | |
| 1559 if (TARGET_V850E && ! TARGET_DISABLE_CALLT) | |
| 1560 emit_insn (gen_callt_save_interrupt ()); | |
| 1561 else | |
| 1562 emit_insn (gen_save_interrupt ()); | |
| 1563 | |
| 1564 actual_fsize -= INTERRUPT_FIXED_SAVE_SIZE; | |
| 1565 | |
| 1566 if (((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1567 actual_fsize -= INTERRUPT_ALL_SAVE_SIZE; | |
| 1568 } | |
| 1569 | |
| 1570 /* Save arg registers to the stack if necessary. */ | |
| 1571 else if (crtl->args.info.anonymous_args) | |
| 1572 { | |
| 1573 if (TARGET_PROLOG_FUNCTION && TARGET_V850E && !TARGET_DISABLE_CALLT) | |
| 1574 emit_insn (gen_save_r6_r9_v850e ()); | |
| 1575 else if (TARGET_PROLOG_FUNCTION && ! TARGET_LONG_CALLS) | |
| 1576 emit_insn (gen_save_r6_r9 ()); | |
| 1577 else | |
| 1578 { | |
| 1579 offset = 0; | |
| 1580 for (i = 6; i < 10; i++) | |
| 1581 { | |
| 1582 emit_move_insn (gen_rtx_MEM (SImode, | |
| 1583 plus_constant (stack_pointer_rtx, | |
| 1584 offset)), | |
| 1585 gen_rtx_REG (SImode, i)); | |
| 1586 offset += 4; | |
| 1587 } | |
| 1588 } | |
| 1589 } | |
| 1590 | |
| 1591 /* Identify all of the saved registers. */ | |
| 1592 num_save = 0; | |
| 1593 default_stack = 0; | |
| 1594 for (i = 1; i < 31; i++) | |
| 1595 { | |
| 1596 if (((1L << i) & reg_saved) != 0) | |
| 1597 save_regs[num_save++] = gen_rtx_REG (Pmode, i); | |
| 1598 } | |
| 1599 | |
| 1600 /* If the return pointer is saved, the helper functions also allocate | |
| 1601 16 bytes of stack for arguments to be saved in. */ | |
| 1602 if (((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1603 { | |
| 1604 save_regs[num_save++] = gen_rtx_REG (Pmode, LINK_POINTER_REGNUM); | |
| 1605 default_stack = 16; | |
| 1606 } | |
| 1607 | |
| 1608 /* See if we have an insn that allocates stack space and saves the particular | |
| 1609 registers we want to. */ | |
| 1610 save_all = NULL_RTX; | |
| 1611 if (TARGET_PROLOG_FUNCTION && num_save > 0 && actual_fsize >= default_stack) | |
| 1612 { | |
| 1613 int alloc_stack = (4 * num_save) + default_stack; | |
| 1614 int unalloc_stack = actual_fsize - alloc_stack; | |
| 1615 int save_func_len = 4; | |
| 1616 int save_normal_len; | |
| 1617 | |
| 1618 if (unalloc_stack) | |
| 1619 save_func_len += CONST_OK_FOR_J (unalloc_stack) ? 2 : 4; | |
| 1620 | |
| 1621 /* see if we would have used ep to save the stack */ | |
| 1622 if (TARGET_EP && num_save > 3 && (unsigned)actual_fsize < 255) | |
| 1623 save_normal_len = (3 * 2) + (2 * num_save); | |
| 1624 else | |
| 1625 save_normal_len = 4 * num_save; | |
| 1626 | |
| 1627 save_normal_len += CONST_OK_FOR_J (actual_fsize) ? 2 : 4; | |
| 1628 | |
| 1629 /* Don't bother checking if we don't actually save any space. | |
| 1630 This happens for instance if one register is saved and additional | |
| 1631 stack space is allocated. */ | |
| 1632 if (save_func_len < save_normal_len) | |
| 1633 { | |
| 1634 save_all = gen_rtx_PARALLEL | |
| 1635 (VOIDmode, | |
| 1636 rtvec_alloc (num_save + 1 | |
| 1637 + (TARGET_V850 ? (TARGET_LONG_CALLS ? 2 : 1) : 0))); | |
| 1638 | |
| 1639 XVECEXP (save_all, 0, 0) | |
| 1640 = gen_rtx_SET (VOIDmode, | |
| 1641 stack_pointer_rtx, | |
| 1642 plus_constant (stack_pointer_rtx, -alloc_stack)); | |
| 1643 | |
| 1644 offset = - default_stack; | |
| 1645 for (i = 0; i < num_save; i++) | |
| 1646 { | |
| 1647 XVECEXP (save_all, 0, i+1) | |
| 1648 = gen_rtx_SET (VOIDmode, | |
| 1649 gen_rtx_MEM (Pmode, | |
| 1650 plus_constant (stack_pointer_rtx, | |
| 1651 offset)), | |
| 1652 save_regs[i]); | |
| 1653 offset -= 4; | |
| 1654 } | |
| 1655 | |
| 1656 if (TARGET_V850) | |
| 1657 { | |
| 1658 XVECEXP (save_all, 0, num_save + 1) | |
| 1659 = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, 10)); | |
| 1660 | |
| 1661 if (TARGET_LONG_CALLS) | |
| 1662 XVECEXP (save_all, 0, num_save + 2) | |
| 1663 = gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, 11)); | |
| 1664 } | |
| 1665 | |
| 1666 code = recog (save_all, NULL_RTX, NULL); | |
| 1667 if (code >= 0) | |
| 1668 { | |
| 1669 rtx insn = emit_insn (save_all); | |
| 1670 INSN_CODE (insn) = code; | |
| 1671 actual_fsize -= alloc_stack; | |
| 1672 | |
| 1673 if (TARGET_DEBUG) | |
| 1674 fprintf (stderr, "\ | |
| 1675 Saved %d bytes via prologue function (%d vs. %d) for function %s\n", | |
| 1676 save_normal_len - save_func_len, | |
| 1677 save_normal_len, save_func_len, | |
| 1678 IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
| 1679 } | |
| 1680 else | |
| 1681 save_all = NULL_RTX; | |
| 1682 } | |
| 1683 } | |
| 1684 | |
| 1685 /* If no prolog save function is available, store the registers the old | |
| 1686 fashioned way (one by one). */ | |
| 1687 if (!save_all) | |
| 1688 { | |
| 1689 /* Special case interrupt functions that save all registers for a call. */ | |
| 1690 if (interrupt_handler && ((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1691 { | |
| 1692 if (TARGET_V850E && ! TARGET_DISABLE_CALLT) | |
| 1693 emit_insn (gen_callt_save_all_interrupt ()); | |
| 1694 else | |
| 1695 emit_insn (gen_save_all_interrupt ()); | |
| 1696 } | |
| 1697 else | |
| 1698 { | |
| 1699 /* If the stack is too big, allocate it in chunks so we can do the | |
| 1700 register saves. We use the register save size so we use the ep | |
| 1701 register. */ | |
| 1702 if (actual_fsize && !CONST_OK_FOR_K (-actual_fsize)) | |
| 1703 init_stack_alloc = compute_register_save_size (NULL); | |
| 1704 else | |
| 1705 init_stack_alloc = actual_fsize; | |
| 1706 | |
| 1707 /* Save registers at the beginning of the stack frame. */ | |
| 1708 offset = init_stack_alloc - 4; | |
| 1709 | |
| 1710 if (init_stack_alloc) | |
| 1711 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1712 stack_pointer_rtx, | |
| 1713 GEN_INT (- (signed) init_stack_alloc))); | |
| 1714 | |
| 1715 /* Save the return pointer first. */ | |
| 1716 if (num_save > 0 && REGNO (save_regs[num_save-1]) == LINK_POINTER_REGNUM) | |
| 1717 { | |
| 1718 emit_move_insn (gen_rtx_MEM (SImode, | |
| 1719 plus_constant (stack_pointer_rtx, | |
| 1720 offset)), | |
| 1721 save_regs[--num_save]); | |
| 1722 offset -= 4; | |
| 1723 } | |
| 1724 | |
| 1725 for (i = 0; i < num_save; i++) | |
| 1726 { | |
| 1727 emit_move_insn (gen_rtx_MEM (SImode, | |
| 1728 plus_constant (stack_pointer_rtx, | |
| 1729 offset)), | |
| 1730 save_regs[i]); | |
| 1731 offset -= 4; | |
| 1732 } | |
| 1733 } | |
| 1734 } | |
| 1735 | |
| 1736 /* Allocate the rest of the stack that was not allocated above (either it is | |
| 1737 > 32K or we just called a function to save the registers and needed more | |
| 1738 stack. */ | |
| 1739 if (actual_fsize > init_stack_alloc) | |
| 1740 { | |
| 1741 int diff = actual_fsize - init_stack_alloc; | |
| 1742 if (CONST_OK_FOR_K (diff)) | |
| 1743 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1744 stack_pointer_rtx, | |
| 1745 GEN_INT (-diff))); | |
| 1746 else | |
| 1747 { | |
| 1748 rtx reg = gen_rtx_REG (Pmode, 12); | |
| 1749 emit_move_insn (reg, GEN_INT (-diff)); | |
| 1750 emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, reg)); | |
| 1751 } | |
| 1752 } | |
| 1753 | |
| 1754 /* If we need a frame pointer, set it up now. */ | |
| 1755 if (frame_pointer_needed) | |
| 1756 emit_move_insn (hard_frame_pointer_rtx, stack_pointer_rtx); | |
| 1757 } | |
| 1758 | |
| 1759 | |
| 1760 void | |
| 1761 expand_epilogue (void) | |
| 1762 { | |
| 1763 unsigned int i; | |
| 1764 int offset; | |
| 1765 unsigned int size = get_frame_size (); | |
| 1766 long reg_saved = 0; | |
| 1767 int actual_fsize = compute_frame_size (size, ®_saved); | |
| 1768 unsigned int init_stack_free = 0; | |
| 1769 rtx restore_regs[32]; | |
| 1770 rtx restore_all; | |
| 1771 unsigned int num_restore; | |
| 1772 unsigned int default_stack; | |
| 1773 int code; | |
| 1774 int interrupt_handler = v850_interrupt_function_p (current_function_decl); | |
| 1775 | |
| 1776 /* Eliminate the initial stack stored by interrupt functions. */ | |
| 1777 if (interrupt_handler) | |
| 1778 { | |
| 1779 actual_fsize -= INTERRUPT_FIXED_SAVE_SIZE; | |
| 1780 if (((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1781 actual_fsize -= INTERRUPT_ALL_SAVE_SIZE; | |
| 1782 } | |
| 1783 | |
| 1784 /* Cut off any dynamic stack created. */ | |
| 1785 if (frame_pointer_needed) | |
| 1786 emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx); | |
| 1787 | |
| 1788 /* Identify all of the saved registers. */ | |
| 1789 num_restore = 0; | |
| 1790 default_stack = 0; | |
| 1791 for (i = 1; i < 31; i++) | |
| 1792 { | |
| 1793 if (((1L << i) & reg_saved) != 0) | |
| 1794 restore_regs[num_restore++] = gen_rtx_REG (Pmode, i); | |
| 1795 } | |
| 1796 | |
| 1797 /* If the return pointer is saved, the helper functions also allocate | |
| 1798 16 bytes of stack for arguments to be saved in. */ | |
| 1799 if (((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1800 { | |
| 1801 restore_regs[num_restore++] = gen_rtx_REG (Pmode, LINK_POINTER_REGNUM); | |
| 1802 default_stack = 16; | |
| 1803 } | |
| 1804 | |
| 1805 /* See if we have an insn that restores the particular registers we | |
| 1806 want to. */ | |
| 1807 restore_all = NULL_RTX; | |
| 1808 | |
| 1809 if (TARGET_PROLOG_FUNCTION | |
| 1810 && num_restore > 0 | |
| 1811 && actual_fsize >= (signed) default_stack | |
| 1812 && !interrupt_handler) | |
| 1813 { | |
| 1814 int alloc_stack = (4 * num_restore) + default_stack; | |
| 1815 int unalloc_stack = actual_fsize - alloc_stack; | |
| 1816 int restore_func_len = 4; | |
| 1817 int restore_normal_len; | |
| 1818 | |
| 1819 if (unalloc_stack) | |
| 1820 restore_func_len += CONST_OK_FOR_J (unalloc_stack) ? 2 : 4; | |
| 1821 | |
| 1822 /* See if we would have used ep to restore the registers. */ | |
| 1823 if (TARGET_EP && num_restore > 3 && (unsigned)actual_fsize < 255) | |
| 1824 restore_normal_len = (3 * 2) + (2 * num_restore); | |
| 1825 else | |
| 1826 restore_normal_len = 4 * num_restore; | |
| 1827 | |
| 1828 restore_normal_len += (CONST_OK_FOR_J (actual_fsize) ? 2 : 4) + 2; | |
| 1829 | |
| 1830 /* Don't bother checking if we don't actually save any space. */ | |
| 1831 if (restore_func_len < restore_normal_len) | |
| 1832 { | |
| 1833 restore_all = gen_rtx_PARALLEL (VOIDmode, | |
| 1834 rtvec_alloc (num_restore + 2)); | |
| 1835 XVECEXP (restore_all, 0, 0) = gen_rtx_RETURN (VOIDmode); | |
| 1836 XVECEXP (restore_all, 0, 1) | |
| 1837 = gen_rtx_SET (VOIDmode, stack_pointer_rtx, | |
| 1838 gen_rtx_PLUS (Pmode, | |
| 1839 stack_pointer_rtx, | |
| 1840 GEN_INT (alloc_stack))); | |
| 1841 | |
| 1842 offset = alloc_stack - 4; | |
| 1843 for (i = 0; i < num_restore; i++) | |
| 1844 { | |
| 1845 XVECEXP (restore_all, 0, i+2) | |
| 1846 = gen_rtx_SET (VOIDmode, | |
| 1847 restore_regs[i], | |
| 1848 gen_rtx_MEM (Pmode, | |
| 1849 plus_constant (stack_pointer_rtx, | |
| 1850 offset))); | |
| 1851 offset -= 4; | |
| 1852 } | |
| 1853 | |
| 1854 code = recog (restore_all, NULL_RTX, NULL); | |
| 1855 | |
| 1856 if (code >= 0) | |
| 1857 { | |
| 1858 rtx insn; | |
| 1859 | |
| 1860 actual_fsize -= alloc_stack; | |
| 1861 if (actual_fsize) | |
| 1862 { | |
| 1863 if (CONST_OK_FOR_K (actual_fsize)) | |
| 1864 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1865 stack_pointer_rtx, | |
| 1866 GEN_INT (actual_fsize))); | |
| 1867 else | |
| 1868 { | |
| 1869 rtx reg = gen_rtx_REG (Pmode, 12); | |
| 1870 emit_move_insn (reg, GEN_INT (actual_fsize)); | |
| 1871 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1872 stack_pointer_rtx, | |
| 1873 reg)); | |
| 1874 } | |
| 1875 } | |
| 1876 | |
| 1877 insn = emit_jump_insn (restore_all); | |
| 1878 INSN_CODE (insn) = code; | |
| 1879 | |
| 1880 if (TARGET_DEBUG) | |
| 1881 fprintf (stderr, "\ | |
| 1882 Saved %d bytes via epilogue function (%d vs. %d) in function %s\n", | |
| 1883 restore_normal_len - restore_func_len, | |
| 1884 restore_normal_len, restore_func_len, | |
| 1885 IDENTIFIER_POINTER (DECL_NAME (current_function_decl))); | |
| 1886 } | |
| 1887 else | |
| 1888 restore_all = NULL_RTX; | |
| 1889 } | |
| 1890 } | |
| 1891 | |
| 1892 /* If no epilogue save function is available, restore the registers the | |
| 1893 old fashioned way (one by one). */ | |
| 1894 if (!restore_all) | |
| 1895 { | |
| 1896 /* If the stack is large, we need to cut it down in 2 pieces. */ | |
| 1897 if (actual_fsize && !CONST_OK_FOR_K (-actual_fsize)) | |
| 1898 init_stack_free = 4 * num_restore; | |
| 1899 else | |
| 1900 init_stack_free = (signed) actual_fsize; | |
| 1901 | |
| 1902 /* Deallocate the rest of the stack if it is > 32K. */ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1903 if ((unsigned int) actual_fsize > init_stack_free) |
| 0 | 1904 { |
| 1905 int diff; | |
| 1906 | |
| 1907 diff = actual_fsize - ((interrupt_handler) ? 0 : init_stack_free); | |
| 1908 | |
| 1909 if (CONST_OK_FOR_K (diff)) | |
| 1910 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1911 stack_pointer_rtx, | |
| 1912 GEN_INT (diff))); | |
| 1913 else | |
| 1914 { | |
| 1915 rtx reg = gen_rtx_REG (Pmode, 12); | |
| 1916 emit_move_insn (reg, GEN_INT (diff)); | |
| 1917 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1918 stack_pointer_rtx, | |
| 1919 reg)); | |
| 1920 } | |
| 1921 } | |
| 1922 | |
| 1923 /* Special case interrupt functions that save all registers | |
| 1924 for a call. */ | |
| 1925 if (interrupt_handler && ((1L << LINK_POINTER_REGNUM) & reg_saved) != 0) | |
| 1926 { | |
| 1927 if (TARGET_V850E && ! TARGET_DISABLE_CALLT) | |
| 1928 emit_insn (gen_callt_restore_all_interrupt ()); | |
| 1929 else | |
| 1930 emit_insn (gen_restore_all_interrupt ()); | |
| 1931 } | |
| 1932 else | |
| 1933 { | |
| 1934 /* Restore registers from the beginning of the stack frame. */ | |
| 1935 offset = init_stack_free - 4; | |
| 1936 | |
| 1937 /* Restore the return pointer first. */ | |
| 1938 if (num_restore > 0 | |
| 1939 && REGNO (restore_regs [num_restore - 1]) == LINK_POINTER_REGNUM) | |
| 1940 { | |
| 1941 emit_move_insn (restore_regs[--num_restore], | |
| 1942 gen_rtx_MEM (SImode, | |
| 1943 plus_constant (stack_pointer_rtx, | |
| 1944 offset))); | |
| 1945 offset -= 4; | |
| 1946 } | |
| 1947 | |
| 1948 for (i = 0; i < num_restore; i++) | |
| 1949 { | |
| 1950 emit_move_insn (restore_regs[i], | |
| 1951 gen_rtx_MEM (SImode, | |
| 1952 plus_constant (stack_pointer_rtx, | |
| 1953 offset))); | |
| 1954 | |
| 1955 emit_use (restore_regs[i]); | |
| 1956 offset -= 4; | |
| 1957 } | |
| 1958 | |
| 1959 /* Cut back the remainder of the stack. */ | |
| 1960 if (init_stack_free) | |
| 1961 emit_insn (gen_addsi3 (stack_pointer_rtx, | |
| 1962 stack_pointer_rtx, | |
| 1963 GEN_INT (init_stack_free))); | |
| 1964 } | |
| 1965 | |
| 1966 /* And return or use reti for interrupt handlers. */ | |
| 1967 if (interrupt_handler) | |
| 1968 { | |
| 1969 if (TARGET_V850E && ! TARGET_DISABLE_CALLT) | |
| 1970 emit_insn (gen_callt_return_interrupt ()); | |
| 1971 else | |
| 1972 emit_jump_insn (gen_return_interrupt ()); | |
| 1973 } | |
| 1974 else if (actual_fsize) | |
| 1975 emit_jump_insn (gen_return_internal ()); | |
| 1976 else | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
1977 emit_jump_insn (gen_return_simple ()); |
| 0 | 1978 } |
| 1979 | |
| 1980 v850_interrupt_cache_p = FALSE; | |
| 1981 v850_interrupt_p = FALSE; | |
| 1982 } | |
| 1983 | |
| 1984 | |
| 1985 /* Update the condition code from the insn. */ | |
| 1986 | |
| 1987 void | |
| 1988 notice_update_cc (rtx body, rtx insn) | |
| 1989 { | |
| 1990 switch (get_attr_cc (insn)) | |
| 1991 { | |
| 1992 case CC_NONE: | |
| 1993 /* Insn does not affect CC at all. */ | |
| 1994 break; | |
| 1995 | |
| 1996 case CC_NONE_0HIT: | |
| 1997 /* Insn does not change CC, but the 0'th operand has been changed. */ | |
| 1998 if (cc_status.value1 != 0 | |
| 1999 && reg_overlap_mentioned_p (recog_data.operand[0], cc_status.value1)) | |
| 2000 cc_status.value1 = 0; | |
| 2001 break; | |
| 2002 | |
| 2003 case CC_SET_ZN: | |
| 2004 /* Insn sets the Z,N flags of CC to recog_data.operand[0]. | |
| 2005 V,C is in an unusable state. */ | |
| 2006 CC_STATUS_INIT; | |
| 2007 cc_status.flags |= CC_OVERFLOW_UNUSABLE | CC_NO_CARRY; | |
| 2008 cc_status.value1 = recog_data.operand[0]; | |
| 2009 break; | |
| 2010 | |
| 2011 case CC_SET_ZNV: | |
| 2012 /* Insn sets the Z,N,V flags of CC to recog_data.operand[0]. | |
| 2013 C is in an unusable state. */ | |
| 2014 CC_STATUS_INIT; | |
| 2015 cc_status.flags |= CC_NO_CARRY; | |
| 2016 cc_status.value1 = recog_data.operand[0]; | |
| 2017 break; | |
| 2018 | |
| 2019 case CC_COMPARE: | |
| 2020 /* The insn is a compare instruction. */ | |
| 2021 CC_STATUS_INIT; | |
| 2022 cc_status.value1 = SET_SRC (body); | |
| 2023 break; | |
| 2024 | |
| 2025 case CC_CLOBBER: | |
| 2026 /* Insn doesn't leave CC in a usable state. */ | |
| 2027 CC_STATUS_INIT; | |
| 2028 break; | |
| 2029 } | |
| 2030 } | |
| 2031 | |
| 2032 /* Retrieve the data area that has been chosen for the given decl. */ | |
| 2033 | |
| 2034 v850_data_area | |
| 2035 v850_get_data_area (tree decl) | |
| 2036 { | |
| 2037 if (lookup_attribute ("sda", DECL_ATTRIBUTES (decl)) != NULL_TREE) | |
| 2038 return DATA_AREA_SDA; | |
| 2039 | |
| 2040 if (lookup_attribute ("tda", DECL_ATTRIBUTES (decl)) != NULL_TREE) | |
| 2041 return DATA_AREA_TDA; | |
| 2042 | |
| 2043 if (lookup_attribute ("zda", DECL_ATTRIBUTES (decl)) != NULL_TREE) | |
| 2044 return DATA_AREA_ZDA; | |
| 2045 | |
| 2046 return DATA_AREA_NORMAL; | |
| 2047 } | |
| 2048 | |
| 2049 /* Store the indicated data area in the decl's attributes. */ | |
| 2050 | |
| 2051 static void | |
| 2052 v850_set_data_area (tree decl, v850_data_area data_area) | |
| 2053 { | |
| 2054 tree name; | |
| 2055 | |
| 2056 switch (data_area) | |
| 2057 { | |
| 2058 case DATA_AREA_SDA: name = get_identifier ("sda"); break; | |
| 2059 case DATA_AREA_TDA: name = get_identifier ("tda"); break; | |
| 2060 case DATA_AREA_ZDA: name = get_identifier ("zda"); break; | |
| 2061 default: | |
| 2062 return; | |
| 2063 } | |
| 2064 | |
| 2065 DECL_ATTRIBUTES (decl) = tree_cons | |
| 2066 (name, NULL, DECL_ATTRIBUTES (decl)); | |
| 2067 } | |
| 2068 | |
| 2069 /* Handle an "interrupt" attribute; arguments as in | |
| 2070 struct attribute_spec.handler. */ | |
| 2071 static tree | |
| 2072 v850_handle_interrupt_attribute (tree * node, | |
| 2073 tree name, | |
| 2074 tree args ATTRIBUTE_UNUSED, | |
| 2075 int flags ATTRIBUTE_UNUSED, | |
| 2076 bool * no_add_attrs) | |
| 2077 { | |
| 2078 if (TREE_CODE (*node) != FUNCTION_DECL) | |
| 2079 { | |
|
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2080 warning (OPT_Wattributes, "%qE attribute only applies to functions", |
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2081 name); |
| 0 | 2082 *no_add_attrs = true; |
| 2083 } | |
| 2084 | |
| 2085 return NULL_TREE; | |
| 2086 } | |
| 2087 | |
| 2088 /* Handle a "sda", "tda" or "zda" attribute; arguments as in | |
| 2089 struct attribute_spec.handler. */ | |
| 2090 static tree | |
| 2091 v850_handle_data_area_attribute (tree* node, | |
| 2092 tree name, | |
| 2093 tree args ATTRIBUTE_UNUSED, | |
| 2094 int flags ATTRIBUTE_UNUSED, | |
| 2095 bool * no_add_attrs) | |
| 2096 { | |
| 2097 v850_data_area data_area; | |
| 2098 v850_data_area area; | |
| 2099 tree decl = *node; | |
| 2100 | |
| 2101 /* Implement data area attribute. */ | |
| 2102 if (is_attribute_p ("sda", name)) | |
| 2103 data_area = DATA_AREA_SDA; | |
| 2104 else if (is_attribute_p ("tda", name)) | |
| 2105 data_area = DATA_AREA_TDA; | |
| 2106 else if (is_attribute_p ("zda", name)) | |
| 2107 data_area = DATA_AREA_ZDA; | |
| 2108 else | |
| 2109 gcc_unreachable (); | |
| 2110 | |
| 2111 switch (TREE_CODE (decl)) | |
| 2112 { | |
| 2113 case VAR_DECL: | |
| 2114 if (current_function_decl != NULL_TREE) | |
| 2115 { | |
|
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|
2116 error_at (DECL_SOURCE_LOCATION (decl), |
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2117 "data area attributes cannot be specified for " |
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|
2118 "local variables"); |
| 0 | 2119 *no_add_attrs = true; |
| 2120 } | |
| 2121 | |
| 2122 /* Drop through. */ | |
| 2123 | |
| 2124 case FUNCTION_DECL: | |
| 2125 area = v850_get_data_area (decl); | |
| 2126 if (area != DATA_AREA_NORMAL && data_area != area) | |
| 2127 { | |
| 2128 error ("data area of %q+D conflicts with previous declaration", | |
| 2129 decl); | |
| 2130 *no_add_attrs = true; | |
| 2131 } | |
| 2132 break; | |
| 2133 | |
| 2134 default: | |
| 2135 break; | |
| 2136 } | |
| 2137 | |
| 2138 return NULL_TREE; | |
| 2139 } | |
| 2140 | |
| 2141 | |
| 2142 /* Return nonzero if FUNC is an interrupt function as specified | |
| 2143 by the "interrupt" attribute. */ | |
| 2144 | |
| 2145 int | |
| 2146 v850_interrupt_function_p (tree func) | |
| 2147 { | |
| 2148 tree a; | |
| 2149 int ret = 0; | |
| 2150 | |
| 2151 if (v850_interrupt_cache_p) | |
| 2152 return v850_interrupt_p; | |
| 2153 | |
| 2154 if (TREE_CODE (func) != FUNCTION_DECL) | |
| 2155 return 0; | |
| 2156 | |
| 2157 a = lookup_attribute ("interrupt_handler", DECL_ATTRIBUTES (func)); | |
| 2158 if (a != NULL_TREE) | |
| 2159 ret = 1; | |
| 2160 | |
| 2161 else | |
| 2162 { | |
| 2163 a = lookup_attribute ("interrupt", DECL_ATTRIBUTES (func)); | |
| 2164 ret = a != NULL_TREE; | |
| 2165 } | |
| 2166 | |
| 2167 /* Its not safe to trust global variables until after function inlining has | |
| 2168 been done. */ | |
| 2169 if (reload_completed | reload_in_progress) | |
| 2170 v850_interrupt_p = ret; | |
| 2171 | |
| 2172 return ret; | |
| 2173 } | |
| 2174 | |
| 2175 | |
| 2176 static void | |
| 2177 v850_encode_data_area (tree decl, rtx symbol) | |
| 2178 { | |
| 2179 int flags; | |
| 2180 | |
| 2181 /* Map explicit sections into the appropriate attribute */ | |
| 2182 if (v850_get_data_area (decl) == DATA_AREA_NORMAL) | |
| 2183 { | |
| 2184 if (DECL_SECTION_NAME (decl)) | |
| 2185 { | |
| 2186 const char *name = TREE_STRING_POINTER (DECL_SECTION_NAME (decl)); | |
| 2187 | |
| 2188 if (streq (name, ".zdata") || streq (name, ".zbss")) | |
| 2189 v850_set_data_area (decl, DATA_AREA_ZDA); | |
| 2190 | |
| 2191 else if (streq (name, ".sdata") || streq (name, ".sbss")) | |
| 2192 v850_set_data_area (decl, DATA_AREA_SDA); | |
| 2193 | |
| 2194 else if (streq (name, ".tdata")) | |
| 2195 v850_set_data_area (decl, DATA_AREA_TDA); | |
| 2196 } | |
| 2197 | |
| 2198 /* If no attribute, support -m{zda,sda,tda}=n */ | |
| 2199 else | |
| 2200 { | |
| 2201 int size = int_size_in_bytes (TREE_TYPE (decl)); | |
| 2202 if (size <= 0) | |
| 2203 ; | |
| 2204 | |
| 2205 else if (size <= small_memory [(int) SMALL_MEMORY_TDA].max) | |
| 2206 v850_set_data_area (decl, DATA_AREA_TDA); | |
| 2207 | |
| 2208 else if (size <= small_memory [(int) SMALL_MEMORY_SDA].max) | |
| 2209 v850_set_data_area (decl, DATA_AREA_SDA); | |
| 2210 | |
| 2211 else if (size <= small_memory [(int) SMALL_MEMORY_ZDA].max) | |
| 2212 v850_set_data_area (decl, DATA_AREA_ZDA); | |
| 2213 } | |
| 2214 | |
| 2215 if (v850_get_data_area (decl) == DATA_AREA_NORMAL) | |
| 2216 return; | |
| 2217 } | |
| 2218 | |
| 2219 flags = SYMBOL_REF_FLAGS (symbol); | |
| 2220 switch (v850_get_data_area (decl)) | |
| 2221 { | |
| 2222 case DATA_AREA_ZDA: flags |= SYMBOL_FLAG_ZDA; break; | |
| 2223 case DATA_AREA_TDA: flags |= SYMBOL_FLAG_TDA; break; | |
| 2224 case DATA_AREA_SDA: flags |= SYMBOL_FLAG_SDA; break; | |
| 2225 default: gcc_unreachable (); | |
| 2226 } | |
| 2227 SYMBOL_REF_FLAGS (symbol) = flags; | |
| 2228 } | |
| 2229 | |
| 2230 static void | |
| 2231 v850_encode_section_info (tree decl, rtx rtl, int first) | |
| 2232 { | |
| 2233 default_encode_section_info (decl, rtl, first); | |
| 2234 | |
| 2235 if (TREE_CODE (decl) == VAR_DECL | |
| 2236 && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) | |
| 2237 v850_encode_data_area (decl, XEXP (rtl, 0)); | |
| 2238 } | |
| 2239 | |
| 2240 /* Construct a JR instruction to a routine that will perform the equivalent of | |
| 2241 the RTL passed in as an argument. This RTL is a function epilogue that | |
| 2242 pops registers off the stack and possibly releases some extra stack space | |
| 2243 as well. The code has already verified that the RTL matches these | |
| 2244 requirements. */ | |
| 2245 char * | |
| 2246 construct_restore_jr (rtx op) | |
| 2247 { | |
| 2248 int count = XVECLEN (op, 0); | |
| 2249 int stack_bytes; | |
| 2250 unsigned long int mask; | |
| 2251 unsigned long int first; | |
| 2252 unsigned long int last; | |
| 2253 int i; | |
| 2254 static char buff [100]; /* XXX */ | |
| 2255 | |
| 2256 if (count <= 2) | |
| 2257 { | |
| 2258 error ("bogus JR construction: %d", count); | |
| 2259 return NULL; | |
| 2260 } | |
| 2261 | |
| 2262 /* Work out how many bytes to pop off the stack before retrieving | |
| 2263 registers. */ | |
| 2264 gcc_assert (GET_CODE (XVECEXP (op, 0, 1)) == SET); | |
| 2265 gcc_assert (GET_CODE (SET_SRC (XVECEXP (op, 0, 1))) == PLUS); | |
| 2266 gcc_assert (GET_CODE (XEXP (SET_SRC (XVECEXP (op, 0, 1)), 1)) == CONST_INT); | |
| 2267 | |
| 2268 stack_bytes = INTVAL (XEXP (SET_SRC (XVECEXP (op, 0, 1)), 1)); | |
| 2269 | |
| 2270 /* Each pop will remove 4 bytes from the stack.... */ | |
| 2271 stack_bytes -= (count - 2) * 4; | |
| 2272 | |
| 2273 /* Make sure that the amount we are popping either 0 or 16 bytes. */ | |
| 2274 if (stack_bytes != 0 && stack_bytes != 16) | |
| 2275 { | |
| 2276 error ("bad amount of stack space removal: %d", stack_bytes); | |
| 2277 return NULL; | |
| 2278 } | |
| 2279 | |
| 2280 /* Now compute the bit mask of registers to push. */ | |
| 2281 mask = 0; | |
| 2282 for (i = 2; i < count; i++) | |
| 2283 { | |
| 2284 rtx vector_element = XVECEXP (op, 0, i); | |
| 2285 | |
| 2286 gcc_assert (GET_CODE (vector_element) == SET); | |
| 2287 gcc_assert (GET_CODE (SET_DEST (vector_element)) == REG); | |
| 2288 gcc_assert (register_is_ok_for_epilogue (SET_DEST (vector_element), | |
| 2289 SImode)); | |
| 2290 | |
| 2291 mask |= 1 << REGNO (SET_DEST (vector_element)); | |
| 2292 } | |
| 2293 | |
| 2294 /* Scan for the first register to pop. */ | |
| 2295 for (first = 0; first < 32; first++) | |
| 2296 { | |
| 2297 if (mask & (1 << first)) | |
| 2298 break; | |
| 2299 } | |
| 2300 | |
| 2301 gcc_assert (first < 32); | |
| 2302 | |
| 2303 /* Discover the last register to pop. */ | |
| 2304 if (mask & (1 << LINK_POINTER_REGNUM)) | |
| 2305 { | |
| 2306 gcc_assert (stack_bytes == 16); | |
| 2307 | |
| 2308 last = LINK_POINTER_REGNUM; | |
| 2309 } | |
| 2310 else | |
| 2311 { | |
| 2312 gcc_assert (!stack_bytes); | |
| 2313 gcc_assert (mask & (1 << 29)); | |
| 2314 | |
| 2315 last = 29; | |
| 2316 } | |
| 2317 | |
| 2318 /* Note, it is possible to have gaps in the register mask. | |
| 2319 We ignore this here, and generate a JR anyway. We will | |
| 2320 be popping more registers than is strictly necessary, but | |
| 2321 it does save code space. */ | |
| 2322 | |
| 2323 if (TARGET_LONG_CALLS) | |
| 2324 { | |
| 2325 char name[40]; | |
| 2326 | |
| 2327 if (first == last) | |
| 2328 sprintf (name, "__return_%s", reg_names [first]); | |
| 2329 else | |
| 2330 sprintf (name, "__return_%s_%s", reg_names [first], reg_names [last]); | |
| 2331 | |
| 2332 sprintf (buff, "movhi hi(%s), r0, r6\n\tmovea lo(%s), r6, r6\n\tjmp r6", | |
| 2333 name, name); | |
| 2334 } | |
| 2335 else | |
| 2336 { | |
| 2337 if (first == last) | |
| 2338 sprintf (buff, "jr __return_%s", reg_names [first]); | |
| 2339 else | |
| 2340 sprintf (buff, "jr __return_%s_%s", reg_names [first], reg_names [last]); | |
| 2341 } | |
| 2342 | |
| 2343 return buff; | |
| 2344 } | |
| 2345 | |
| 2346 | |
| 2347 /* Construct a JARL instruction to a routine that will perform the equivalent | |
| 2348 of the RTL passed as a parameter. This RTL is a function prologue that | |
| 2349 saves some of the registers r20 - r31 onto the stack, and possibly acquires | |
| 2350 some stack space as well. The code has already verified that the RTL | |
| 2351 matches these requirements. */ | |
| 2352 char * | |
| 2353 construct_save_jarl (rtx op) | |
| 2354 { | |
| 2355 int count = XVECLEN (op, 0); | |
| 2356 int stack_bytes; | |
| 2357 unsigned long int mask; | |
| 2358 unsigned long int first; | |
| 2359 unsigned long int last; | |
| 2360 int i; | |
| 2361 static char buff [100]; /* XXX */ | |
| 2362 | |
| 2363 if (count <= 2) | |
| 2364 { | |
| 2365 error ("bogus JARL construction: %d\n", count); | |
| 2366 return NULL; | |
| 2367 } | |
| 2368 | |
| 2369 /* Paranoia. */ | |
| 2370 gcc_assert (GET_CODE (XVECEXP (op, 0, 0)) == SET); | |
| 2371 gcc_assert (GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) == PLUS); | |
| 2372 gcc_assert (GET_CODE (XEXP (SET_SRC (XVECEXP (op, 0, 0)), 0)) == REG); | |
| 2373 gcc_assert (GET_CODE (XEXP (SET_SRC (XVECEXP (op, 0, 0)), 1)) == CONST_INT); | |
| 2374 | |
| 2375 /* Work out how many bytes to push onto the stack after storing the | |
| 2376 registers. */ | |
| 2377 stack_bytes = INTVAL (XEXP (SET_SRC (XVECEXP (op, 0, 0)), 1)); | |
| 2378 | |
| 2379 /* Each push will put 4 bytes from the stack.... */ | |
| 2380 stack_bytes += (count - (TARGET_LONG_CALLS ? 3 : 2)) * 4; | |
| 2381 | |
| 2382 /* Make sure that the amount we are popping either 0 or 16 bytes. */ | |
| 2383 if (stack_bytes != 0 && stack_bytes != -16) | |
| 2384 { | |
| 2385 error ("bad amount of stack space removal: %d", stack_bytes); | |
| 2386 return NULL; | |
| 2387 } | |
| 2388 | |
| 2389 /* Now compute the bit mask of registers to push. */ | |
| 2390 mask = 0; | |
| 2391 for (i = 1; i < count - (TARGET_LONG_CALLS ? 2 : 1); i++) | |
| 2392 { | |
| 2393 rtx vector_element = XVECEXP (op, 0, i); | |
| 2394 | |
| 2395 gcc_assert (GET_CODE (vector_element) == SET); | |
| 2396 gcc_assert (GET_CODE (SET_SRC (vector_element)) == REG); | |
| 2397 gcc_assert (register_is_ok_for_epilogue (SET_SRC (vector_element), | |
| 2398 SImode)); | |
| 2399 | |
| 2400 mask |= 1 << REGNO (SET_SRC (vector_element)); | |
| 2401 } | |
| 2402 | |
| 2403 /* Scan for the first register to push. */ | |
| 2404 for (first = 0; first < 32; first++) | |
| 2405 { | |
| 2406 if (mask & (1 << first)) | |
| 2407 break; | |
| 2408 } | |
| 2409 | |
| 2410 gcc_assert (first < 32); | |
| 2411 | |
| 2412 /* Discover the last register to push. */ | |
| 2413 if (mask & (1 << LINK_POINTER_REGNUM)) | |
| 2414 { | |
| 2415 gcc_assert (stack_bytes == -16); | |
| 2416 | |
| 2417 last = LINK_POINTER_REGNUM; | |
| 2418 } | |
| 2419 else | |
| 2420 { | |
| 2421 gcc_assert (!stack_bytes); | |
| 2422 gcc_assert (mask & (1 << 29)); | |
| 2423 | |
| 2424 last = 29; | |
| 2425 } | |
| 2426 | |
| 2427 /* Note, it is possible to have gaps in the register mask. | |
| 2428 We ignore this here, and generate a JARL anyway. We will | |
| 2429 be pushing more registers than is strictly necessary, but | |
| 2430 it does save code space. */ | |
| 2431 | |
| 2432 if (TARGET_LONG_CALLS) | |
| 2433 { | |
| 2434 char name[40]; | |
| 2435 | |
| 2436 if (first == last) | |
| 2437 sprintf (name, "__save_%s", reg_names [first]); | |
| 2438 else | |
| 2439 sprintf (name, "__save_%s_%s", reg_names [first], reg_names [last]); | |
| 2440 | |
| 2441 sprintf (buff, "movhi hi(%s), r0, r11\n\tmovea lo(%s), r11, r11\n\tjarl .+4, r10\n\tadd 4, r10\n\tjmp r11", | |
| 2442 name, name); | |
| 2443 } | |
| 2444 else | |
| 2445 { | |
| 2446 if (first == last) | |
| 2447 sprintf (buff, "jarl __save_%s, r10", reg_names [first]); | |
| 2448 else | |
| 2449 sprintf (buff, "jarl __save_%s_%s, r10", reg_names [first], | |
| 2450 reg_names [last]); | |
| 2451 } | |
| 2452 | |
| 2453 return buff; | |
| 2454 } | |
| 2455 | |
| 2456 extern tree last_assemble_variable_decl; | |
| 2457 extern int size_directive_output; | |
| 2458 | |
| 2459 /* A version of asm_output_aligned_bss() that copes with the special | |
| 2460 data areas of the v850. */ | |
| 2461 void | |
| 2462 v850_output_aligned_bss (FILE * file, | |
| 2463 tree decl, | |
| 2464 const char * name, | |
| 2465 unsigned HOST_WIDE_INT size, | |
| 2466 int align) | |
| 2467 { | |
| 2468 switch (v850_get_data_area (decl)) | |
| 2469 { | |
| 2470 case DATA_AREA_ZDA: | |
| 2471 switch_to_section (zbss_section); | |
| 2472 break; | |
| 2473 | |
| 2474 case DATA_AREA_SDA: | |
| 2475 switch_to_section (sbss_section); | |
| 2476 break; | |
| 2477 | |
| 2478 case DATA_AREA_TDA: | |
| 2479 switch_to_section (tdata_section); | |
| 2480 | |
| 2481 default: | |
| 2482 switch_to_section (bss_section); | |
| 2483 break; | |
| 2484 } | |
| 2485 | |
| 2486 ASM_OUTPUT_ALIGN (file, floor_log2 (align / BITS_PER_UNIT)); | |
| 2487 #ifdef ASM_DECLARE_OBJECT_NAME | |
| 2488 last_assemble_variable_decl = decl; | |
| 2489 ASM_DECLARE_OBJECT_NAME (file, name, decl); | |
| 2490 #else | |
| 2491 /* Standard thing is just output label for the object. */ | |
| 2492 ASM_OUTPUT_LABEL (file, name); | |
| 2493 #endif /* ASM_DECLARE_OBJECT_NAME */ | |
| 2494 ASM_OUTPUT_SKIP (file, size ? size : 1); | |
| 2495 } | |
| 2496 | |
| 2497 /* Called via the macro ASM_OUTPUT_DECL_COMMON */ | |
| 2498 void | |
| 2499 v850_output_common (FILE * file, | |
| 2500 tree decl, | |
| 2501 const char * name, | |
| 2502 int size, | |
| 2503 int align) | |
| 2504 { | |
| 2505 if (decl == NULL_TREE) | |
| 2506 { | |
| 2507 fprintf (file, "%s", COMMON_ASM_OP); | |
| 2508 } | |
| 2509 else | |
| 2510 { | |
| 2511 switch (v850_get_data_area (decl)) | |
| 2512 { | |
| 2513 case DATA_AREA_ZDA: | |
| 2514 fprintf (file, "%s", ZCOMMON_ASM_OP); | |
| 2515 break; | |
| 2516 | |
| 2517 case DATA_AREA_SDA: | |
| 2518 fprintf (file, "%s", SCOMMON_ASM_OP); | |
| 2519 break; | |
| 2520 | |
| 2521 case DATA_AREA_TDA: | |
| 2522 fprintf (file, "%s", TCOMMON_ASM_OP); | |
| 2523 break; | |
| 2524 | |
| 2525 default: | |
| 2526 fprintf (file, "%s", COMMON_ASM_OP); | |
| 2527 break; | |
| 2528 } | |
| 2529 } | |
| 2530 | |
| 2531 assemble_name (file, name); | |
| 2532 fprintf (file, ",%u,%u\n", size, align / BITS_PER_UNIT); | |
| 2533 } | |
| 2534 | |
| 2535 /* Called via the macro ASM_OUTPUT_DECL_LOCAL */ | |
| 2536 void | |
| 2537 v850_output_local (FILE * file, | |
| 2538 tree decl, | |
| 2539 const char * name, | |
| 2540 int size, | |
| 2541 int align) | |
| 2542 { | |
| 2543 fprintf (file, "%s", LOCAL_ASM_OP); | |
| 2544 assemble_name (file, name); | |
| 2545 fprintf (file, "\n"); | |
| 2546 | |
| 2547 ASM_OUTPUT_ALIGNED_DECL_COMMON (file, decl, name, size, align); | |
| 2548 } | |
| 2549 | |
| 2550 /* Add data area to the given declaration if a ghs data area pragma is | |
| 2551 currently in effect (#pragma ghs startXXX/endXXX). */ | |
| 2552 static void | |
| 2553 v850_insert_attributes (tree decl, tree * attr_ptr ATTRIBUTE_UNUSED ) | |
| 2554 { | |
| 2555 if (data_area_stack | |
| 2556 && data_area_stack->data_area | |
| 2557 && current_function_decl == NULL_TREE | |
| 2558 && (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == CONST_DECL) | |
| 2559 && v850_get_data_area (decl) == DATA_AREA_NORMAL) | |
| 2560 v850_set_data_area (decl, data_area_stack->data_area); | |
| 2561 | |
| 2562 /* Initialize the default names of the v850 specific sections, | |
| 2563 if this has not been done before. */ | |
| 2564 | |
| 2565 if (GHS_default_section_names [(int) GHS_SECTION_KIND_SDATA] == NULL) | |
| 2566 { | |
| 2567 GHS_default_section_names [(int) GHS_SECTION_KIND_SDATA] | |
| 2568 = build_string (sizeof (".sdata")-1, ".sdata"); | |
| 2569 | |
| 2570 GHS_default_section_names [(int) GHS_SECTION_KIND_ROSDATA] | |
| 2571 = build_string (sizeof (".rosdata")-1, ".rosdata"); | |
| 2572 | |
| 2573 GHS_default_section_names [(int) GHS_SECTION_KIND_TDATA] | |
| 2574 = build_string (sizeof (".tdata")-1, ".tdata"); | |
| 2575 | |
| 2576 GHS_default_section_names [(int) GHS_SECTION_KIND_ZDATA] | |
| 2577 = build_string (sizeof (".zdata")-1, ".zdata"); | |
| 2578 | |
| 2579 GHS_default_section_names [(int) GHS_SECTION_KIND_ROZDATA] | |
| 2580 = build_string (sizeof (".rozdata")-1, ".rozdata"); | |
| 2581 } | |
| 2582 | |
| 2583 if (current_function_decl == NULL_TREE | |
| 2584 && (TREE_CODE (decl) == VAR_DECL | |
| 2585 || TREE_CODE (decl) == CONST_DECL | |
| 2586 || TREE_CODE (decl) == FUNCTION_DECL) | |
| 2587 && (!DECL_EXTERNAL (decl) || DECL_INITIAL (decl)) | |
| 2588 && !DECL_SECTION_NAME (decl)) | |
| 2589 { | |
| 2590 enum GHS_section_kind kind = GHS_SECTION_KIND_DEFAULT; | |
| 2591 tree chosen_section; | |
| 2592 | |
| 2593 if (TREE_CODE (decl) == FUNCTION_DECL) | |
| 2594 kind = GHS_SECTION_KIND_TEXT; | |
| 2595 else | |
| 2596 { | |
| 2597 /* First choose a section kind based on the data area of the decl. */ | |
| 2598 switch (v850_get_data_area (decl)) | |
| 2599 { | |
| 2600 default: | |
| 2601 gcc_unreachable (); | |
| 2602 | |
| 2603 case DATA_AREA_SDA: | |
| 2604 kind = ((TREE_READONLY (decl)) | |
| 2605 ? GHS_SECTION_KIND_ROSDATA | |
| 2606 : GHS_SECTION_KIND_SDATA); | |
| 2607 break; | |
| 2608 | |
| 2609 case DATA_AREA_TDA: | |
| 2610 kind = GHS_SECTION_KIND_TDATA; | |
| 2611 break; | |
| 2612 | |
| 2613 case DATA_AREA_ZDA: | |
| 2614 kind = ((TREE_READONLY (decl)) | |
| 2615 ? GHS_SECTION_KIND_ROZDATA | |
| 2616 : GHS_SECTION_KIND_ZDATA); | |
| 2617 break; | |
| 2618 | |
| 2619 case DATA_AREA_NORMAL: /* default data area */ | |
| 2620 if (TREE_READONLY (decl)) | |
| 2621 kind = GHS_SECTION_KIND_RODATA; | |
| 2622 else if (DECL_INITIAL (decl)) | |
| 2623 kind = GHS_SECTION_KIND_DATA; | |
| 2624 else | |
| 2625 kind = GHS_SECTION_KIND_BSS; | |
| 2626 } | |
| 2627 } | |
| 2628 | |
| 2629 /* Now, if the section kind has been explicitly renamed, | |
| 2630 then attach a section attribute. */ | |
| 2631 chosen_section = GHS_current_section_names [(int) kind]; | |
| 2632 | |
| 2633 /* Otherwise, if this kind of section needs an explicit section | |
| 2634 attribute, then also attach one. */ | |
| 2635 if (chosen_section == NULL) | |
| 2636 chosen_section = GHS_default_section_names [(int) kind]; | |
| 2637 | |
| 2638 if (chosen_section) | |
| 2639 { | |
| 2640 /* Only set the section name if specified by a pragma, because | |
| 2641 otherwise it will force those variables to get allocated storage | |
| 2642 in this module, rather than by the linker. */ | |
| 2643 DECL_SECTION_NAME (decl) = chosen_section; | |
| 2644 } | |
| 2645 } | |
| 2646 } | |
| 2647 | |
| 2648 /* Construct a DISPOSE instruction that is the equivalent of | |
| 2649 the given RTX. We have already verified that this should | |
| 2650 be possible. */ | |
| 2651 | |
| 2652 char * | |
| 2653 construct_dispose_instruction (rtx op) | |
| 2654 { | |
| 2655 int count = XVECLEN (op, 0); | |
| 2656 int stack_bytes; | |
| 2657 unsigned long int mask; | |
| 2658 int i; | |
| 2659 static char buff[ 100 ]; /* XXX */ | |
| 2660 int use_callt = 0; | |
| 2661 | |
| 2662 if (count <= 2) | |
| 2663 { | |
| 2664 error ("bogus DISPOSE construction: %d", count); | |
| 2665 return NULL; | |
| 2666 } | |
| 2667 | |
| 2668 /* Work out how many bytes to pop off the | |
| 2669 stack before retrieving registers. */ | |
| 2670 gcc_assert (GET_CODE (XVECEXP (op, 0, 1)) == SET); | |
| 2671 gcc_assert (GET_CODE (SET_SRC (XVECEXP (op, 0, 1))) == PLUS); | |
| 2672 gcc_assert (GET_CODE (XEXP (SET_SRC (XVECEXP (op, 0, 1)), 1)) == CONST_INT); | |
| 2673 | |
| 2674 stack_bytes = INTVAL (XEXP (SET_SRC (XVECEXP (op, 0, 1)), 1)); | |
| 2675 | |
| 2676 /* Each pop will remove 4 bytes from the stack.... */ | |
| 2677 stack_bytes -= (count - 2) * 4; | |
| 2678 | |
| 2679 /* Make sure that the amount we are popping | |
| 2680 will fit into the DISPOSE instruction. */ | |
| 2681 if (stack_bytes > 128) | |
| 2682 { | |
| 2683 error ("too much stack space to dispose of: %d", stack_bytes); | |
| 2684 return NULL; | |
| 2685 } | |
| 2686 | |
| 2687 /* Now compute the bit mask of registers to push. */ | |
| 2688 mask = 0; | |
| 2689 | |
| 2690 for (i = 2; i < count; i++) | |
| 2691 { | |
| 2692 rtx vector_element = XVECEXP (op, 0, i); | |
| 2693 | |
| 2694 gcc_assert (GET_CODE (vector_element) == SET); | |
| 2695 gcc_assert (GET_CODE (SET_DEST (vector_element)) == REG); | |
| 2696 gcc_assert (register_is_ok_for_epilogue (SET_DEST (vector_element), | |
| 2697 SImode)); | |
| 2698 | |
| 2699 if (REGNO (SET_DEST (vector_element)) == 2) | |
| 2700 use_callt = 1; | |
| 2701 else | |
| 2702 mask |= 1 << REGNO (SET_DEST (vector_element)); | |
| 2703 } | |
| 2704 | |
| 2705 if (! TARGET_DISABLE_CALLT | |
| 2706 && (use_callt || stack_bytes == 0 || stack_bytes == 16)) | |
| 2707 { | |
| 2708 if (use_callt) | |
| 2709 { | |
| 2710 sprintf (buff, "callt ctoff(__callt_return_r2_r%d)", (mask & (1 << 31)) ? 31 : 29); | |
| 2711 return buff; | |
| 2712 } | |
| 2713 else | |
| 2714 { | |
| 2715 for (i = 20; i < 32; i++) | |
| 2716 if (mask & (1 << i)) | |
| 2717 break; | |
| 2718 | |
| 2719 if (i == 31) | |
| 2720 sprintf (buff, "callt ctoff(__callt_return_r31c)"); | |
| 2721 else | |
| 2722 sprintf (buff, "callt ctoff(__callt_return_r%d_r%d%s)", | |
| 2723 i, (mask & (1 << 31)) ? 31 : 29, stack_bytes ? "c" : ""); | |
| 2724 } | |
| 2725 } | |
| 2726 else | |
| 2727 { | |
| 2728 static char regs [100]; /* XXX */ | |
| 2729 int done_one; | |
| 2730 | |
| 2731 /* Generate the DISPOSE instruction. Note we could just issue the | |
| 2732 bit mask as a number as the assembler can cope with this, but for | |
| 2733 the sake of our readers we turn it into a textual description. */ | |
| 2734 regs[0] = 0; | |
| 2735 done_one = 0; | |
| 2736 | |
| 2737 for (i = 20; i < 32; i++) | |
| 2738 { | |
| 2739 if (mask & (1 << i)) | |
| 2740 { | |
| 2741 int first; | |
| 2742 | |
| 2743 if (done_one) | |
| 2744 strcat (regs, ", "); | |
| 2745 else | |
| 2746 done_one = 1; | |
| 2747 | |
| 2748 first = i; | |
| 2749 strcat (regs, reg_names[ first ]); | |
| 2750 | |
| 2751 for (i++; i < 32; i++) | |
| 2752 if ((mask & (1 << i)) == 0) | |
| 2753 break; | |
| 2754 | |
| 2755 if (i > first + 1) | |
| 2756 { | |
| 2757 strcat (regs, " - "); | |
| 2758 strcat (regs, reg_names[ i - 1 ] ); | |
| 2759 } | |
| 2760 } | |
| 2761 } | |
| 2762 | |
| 2763 sprintf (buff, "dispose %d {%s}, r31", stack_bytes / 4, regs); | |
| 2764 } | |
| 2765 | |
| 2766 return buff; | |
| 2767 } | |
| 2768 | |
| 2769 /* Construct a PREPARE instruction that is the equivalent of | |
| 2770 the given RTL. We have already verified that this should | |
| 2771 be possible. */ | |
| 2772 | |
| 2773 char * | |
| 2774 construct_prepare_instruction (rtx op) | |
| 2775 { | |
| 2776 int count = XVECLEN (op, 0); | |
| 2777 int stack_bytes; | |
| 2778 unsigned long int mask; | |
| 2779 int i; | |
| 2780 static char buff[ 100 ]; /* XXX */ | |
| 2781 int use_callt = 0; | |
| 2782 | |
| 2783 if (count <= 1) | |
| 2784 { | |
| 2785 error ("bogus PREPEARE construction: %d", count); | |
| 2786 return NULL; | |
| 2787 } | |
| 2788 | |
| 2789 /* Work out how many bytes to push onto | |
| 2790 the stack after storing the registers. */ | |
| 2791 gcc_assert (GET_CODE (XVECEXP (op, 0, 0)) == SET); | |
| 2792 gcc_assert (GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) == PLUS); | |
| 2793 gcc_assert (GET_CODE (XEXP (SET_SRC (XVECEXP (op, 0, 0)), 1)) == CONST_INT); | |
| 2794 | |
| 2795 stack_bytes = INTVAL (XEXP (SET_SRC (XVECEXP (op, 0, 0)), 1)); | |
| 2796 | |
| 2797 /* Each push will put 4 bytes from the stack. */ | |
| 2798 stack_bytes += (count - 1) * 4; | |
| 2799 | |
| 2800 /* Make sure that the amount we are popping | |
| 2801 will fit into the DISPOSE instruction. */ | |
| 2802 if (stack_bytes < -128) | |
| 2803 { | |
| 2804 error ("too much stack space to prepare: %d", stack_bytes); | |
| 2805 return NULL; | |
| 2806 } | |
| 2807 | |
| 2808 /* Now compute the bit mask of registers to push. */ | |
| 2809 mask = 0; | |
| 2810 for (i = 1; i < count; i++) | |
| 2811 { | |
| 2812 rtx vector_element = XVECEXP (op, 0, i); | |
| 2813 | |
| 2814 gcc_assert (GET_CODE (vector_element) == SET); | |
| 2815 gcc_assert (GET_CODE (SET_SRC (vector_element)) == REG); | |
| 2816 gcc_assert (register_is_ok_for_epilogue (SET_SRC (vector_element), | |
| 2817 SImode)); | |
| 2818 | |
| 2819 if (REGNO (SET_SRC (vector_element)) == 2) | |
| 2820 use_callt = 1; | |
| 2821 else | |
| 2822 mask |= 1 << REGNO (SET_SRC (vector_element)); | |
| 2823 } | |
| 2824 | |
| 2825 if ((! TARGET_DISABLE_CALLT) | |
| 2826 && (use_callt || stack_bytes == 0 || stack_bytes == -16)) | |
| 2827 { | |
| 2828 if (use_callt) | |
| 2829 { | |
| 2830 sprintf (buff, "callt ctoff(__callt_save_r2_r%d)", (mask & (1 << 31)) ? 31 : 29 ); | |
| 2831 return buff; | |
| 2832 } | |
| 2833 | |
| 2834 for (i = 20; i < 32; i++) | |
| 2835 if (mask & (1 << i)) | |
| 2836 break; | |
| 2837 | |
| 2838 if (i == 31) | |
| 2839 sprintf (buff, "callt ctoff(__callt_save_r31c)"); | |
| 2840 else | |
| 2841 sprintf (buff, "callt ctoff(__callt_save_r%d_r%d%s)", | |
| 2842 i, (mask & (1 << 31)) ? 31 : 29, stack_bytes ? "c" : ""); | |
| 2843 } | |
| 2844 else | |
| 2845 { | |
| 2846 static char regs [100]; /* XXX */ | |
| 2847 int done_one; | |
| 2848 | |
| 2849 | |
| 2850 /* Generate the PREPARE instruction. Note we could just issue the | |
| 2851 bit mask as a number as the assembler can cope with this, but for | |
| 2852 the sake of our readers we turn it into a textual description. */ | |
| 2853 regs[0] = 0; | |
| 2854 done_one = 0; | |
| 2855 | |
| 2856 for (i = 20; i < 32; i++) | |
| 2857 { | |
| 2858 if (mask & (1 << i)) | |
| 2859 { | |
| 2860 int first; | |
| 2861 | |
| 2862 if (done_one) | |
| 2863 strcat (regs, ", "); | |
| 2864 else | |
| 2865 done_one = 1; | |
| 2866 | |
| 2867 first = i; | |
| 2868 strcat (regs, reg_names[ first ]); | |
| 2869 | |
| 2870 for (i++; i < 32; i++) | |
| 2871 if ((mask & (1 << i)) == 0) | |
| 2872 break; | |
| 2873 | |
| 2874 if (i > first + 1) | |
| 2875 { | |
| 2876 strcat (regs, " - "); | |
| 2877 strcat (regs, reg_names[ i - 1 ] ); | |
| 2878 } | |
| 2879 } | |
| 2880 } | |
| 2881 | |
| 2882 sprintf (buff, "prepare {%s}, %d", regs, (- stack_bytes) / 4); | |
| 2883 } | |
| 2884 | |
| 2885 return buff; | |
| 2886 } | |
| 2887 | |
| 2888 /* Return an RTX indicating where the return address to the | |
| 2889 calling function can be found. */ | |
| 2890 | |
| 2891 rtx | |
| 2892 v850_return_addr (int count) | |
| 2893 { | |
| 2894 if (count != 0) | |
| 2895 return const0_rtx; | |
| 2896 | |
| 2897 return get_hard_reg_initial_val (Pmode, LINK_POINTER_REGNUM); | |
| 2898 } | |
| 2899 | |
| 2900 /* Implement TARGET_ASM_INIT_SECTIONS. */ | |
| 2901 | |
| 2902 static void | |
| 2903 v850_asm_init_sections (void) | |
| 2904 { | |
| 2905 rosdata_section | |
| 2906 = get_unnamed_section (0, output_section_asm_op, | |
| 2907 "\t.section .rosdata,\"a\""); | |
| 2908 | |
| 2909 rozdata_section | |
| 2910 = get_unnamed_section (0, output_section_asm_op, | |
| 2911 "\t.section .rozdata,\"a\""); | |
| 2912 | |
| 2913 tdata_section | |
| 2914 = get_unnamed_section (SECTION_WRITE, output_section_asm_op, | |
| 2915 "\t.section .tdata,\"aw\""); | |
| 2916 | |
| 2917 zdata_section | |
| 2918 = get_unnamed_section (SECTION_WRITE, output_section_asm_op, | |
| 2919 "\t.section .zdata,\"aw\""); | |
| 2920 | |
| 2921 zbss_section | |
| 2922 = get_unnamed_section (SECTION_WRITE | SECTION_BSS, | |
| 2923 output_section_asm_op, | |
| 2924 "\t.section .zbss,\"aw\""); | |
| 2925 } | |
| 2926 | |
| 2927 static section * | |
| 2928 v850_select_section (tree exp, | |
| 2929 int reloc ATTRIBUTE_UNUSED, | |
| 2930 unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
| 2931 { | |
| 2932 if (TREE_CODE (exp) == VAR_DECL) | |
| 2933 { | |
| 2934 int is_const; | |
| 2935 if (!TREE_READONLY (exp) | |
| 2936 || TREE_SIDE_EFFECTS (exp) | |
| 2937 || !DECL_INITIAL (exp) | |
| 2938 || (DECL_INITIAL (exp) != error_mark_node | |
| 2939 && !TREE_CONSTANT (DECL_INITIAL (exp)))) | |
| 2940 is_const = FALSE; | |
| 2941 else | |
| 2942 is_const = TRUE; | |
| 2943 | |
| 2944 switch (v850_get_data_area (exp)) | |
| 2945 { | |
| 2946 case DATA_AREA_ZDA: | |
| 2947 return is_const ? rozdata_section : zdata_section; | |
| 2948 | |
| 2949 case DATA_AREA_TDA: | |
| 2950 return tdata_section; | |
| 2951 | |
| 2952 case DATA_AREA_SDA: | |
| 2953 return is_const ? rosdata_section : sdata_section; | |
| 2954 | |
| 2955 default: | |
| 2956 return is_const ? readonly_data_section : data_section; | |
| 2957 } | |
| 2958 } | |
| 2959 return readonly_data_section; | |
| 2960 } | |
| 2961 | |
| 2962 /* Worker function for TARGET_RETURN_IN_MEMORY. */ | |
| 2963 | |
| 2964 static bool | |
| 2965 v850_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) | |
| 2966 { | |
| 2967 /* Return values > 8 bytes in length in memory. */ | |
| 2968 return int_size_in_bytes (type) > 8 || TYPE_MODE (type) == BLKmode; | |
| 2969 } | |
|
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2970 |
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2971 /* Worker function for TARGET_FUNCTION_VALUE. */ |
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2972 |
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2973 rtx |
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2974 v850_function_value (const_tree valtype, |
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2975 const_tree fn_decl_or_type ATTRIBUTE_UNUSED, |
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2976 bool outgoing ATTRIBUTE_UNUSED) |
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2977 { |
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|
2978 return gen_rtx_REG (TYPE_MODE (valtype), 10); |
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2979 } |
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|
2980 |
| 0 | 2981 |
| 2982 /* Worker function for TARGET_SETUP_INCOMING_VARARGS. */ | |
| 2983 | |
| 2984 static void | |
| 2985 v850_setup_incoming_varargs (CUMULATIVE_ARGS *ca, | |
| 2986 enum machine_mode mode ATTRIBUTE_UNUSED, | |
| 2987 tree type ATTRIBUTE_UNUSED, | |
| 2988 int *pretend_arg_size ATTRIBUTE_UNUSED, | |
| 2989 int second_time ATTRIBUTE_UNUSED) | |
| 2990 { | |
| 2991 ca->anonymous_args = (!TARGET_GHS ? 1 : 0); | |
| 2992 } | |
| 2993 | |
|
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2994 /* Worker function for TARGET_CAN_ELIMINATE. */ |
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2995 |
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|
2996 static bool |
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2997 v850_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) |
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2998 { |
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2999 return (to == STACK_POINTER_REGNUM ? ! frame_pointer_needed : true); |
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3000 } |
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|
3001 |
|
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|
3002 |
|
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3003 /* Worker function for TARGET_ASM_TRAMPOLINE_TEMPLATE. */ |
|
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|
3004 |
|
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|
3005 static void |
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3006 v850_asm_trampoline_template (FILE *f) |
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3007 { |
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3008 fprintf (f, "\tjarl .+4,r12\n"); |
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3009 fprintf (f, "\tld.w 12[r12],r20\n"); |
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3010 fprintf (f, "\tld.w 16[r12],r12\n"); |
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3011 fprintf (f, "\tjmp [r12]\n"); |
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3012 fprintf (f, "\tnop\n"); |
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3013 fprintf (f, "\t.long 0\n"); |
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3014 fprintf (f, "\t.long 0\n"); |
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3015 } |
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3016 |
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3017 /* Worker function for TARGET_TRAMPOLINE_INIT. */ |
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3018 |
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3019 static void |
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3020 v850_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value) |
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3021 { |
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3022 rtx mem, fnaddr = XEXP (DECL_RTL (fndecl), 0); |
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3023 |
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3024 emit_block_move (m_tramp, assemble_trampoline_template (), |
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3025 GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); |
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3026 |
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3027 mem = adjust_address (m_tramp, SImode, 16); |
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3028 emit_move_insn (mem, chain_value); |
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3029 mem = adjust_address (m_tramp, SImode, 20); |
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3030 emit_move_insn (mem, fnaddr); |
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3031 } |
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3032 |
| 0 | 3033 #include "gt-v850.h" |