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1.1 ! root 1: /* Definitions of target machine for GNU compiler. MIPS version. ! 2: Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. ! 3: Contributed by A. Lichnewsky, [email protected] ! 4: Changed by Michael Meissner, [email protected] ! 5: ! 6: This file is part of GNU CC. ! 7: ! 8: GNU CC is free software; you can redistribute it and/or modify ! 9: it under the terms of the GNU General Public License as published by ! 10: the Free Software Foundation; either version 2, or (at your option) ! 11: any later version. ! 12: ! 13: GNU CC is distributed in the hope that it will be useful, ! 14: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 16: GNU General Public License for more details. ! 17: ! 18: You should have received a copy of the GNU General Public License ! 19: along with GNU CC; see the file COPYING. If not, write to ! 20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ ! 21: ! 22: ! 23: /* Make Saber happier on obstack.[ch]. */ ! 24: #if defined(__mips__) || defined(mips) ! 25: #define __PTR_TO_INT(P) ((int)(P)) ! 26: #define __INT_TO_PTR(P) ((char *)(P)) ! 27: #endif ! 28: ! 29: /* Standard GCC variables that we reference. */ ! 30: ! 31: extern char *asm_file_name; ! 32: extern char call_used_regs[]; ! 33: extern int current_function_calls_alloca; ! 34: extern int flag_omit_frame_pointer; ! 35: extern int frame_pointer_needed; ! 36: extern char *language_string; ! 37: extern int may_call_alloca; ! 38: extern int optimize; ! 39: extern char **save_argv; ! 40: extern int target_flags; ! 41: extern char *version_string; ! 42: ! 43: /* MIPS external variables defined in mips.c. */ ! 44: ! 45: /* comparison type */ ! 46: enum cmp_type { ! 47: CMP_SI, /* compare integers */ ! 48: CMP_SF, /* compare single precision floats */ ! 49: CMP_DF, /* compare double precision floats */ ! 50: CMP_MAX /* max comparison type */ ! 51: }; ! 52: ! 53: /* types of delay slot */ ! 54: enum delay_type { ! 55: DELAY_NONE, /* no delay slot */ ! 56: DELAY_LOAD, /* load from memory delay */ ! 57: DELAY_HILO, /* move from/to hi/lo registers */ ! 58: DELAY_FCMP /* delay after doing c.<xx>.{d,s} */ ! 59: }; ! 60: ! 61: /* Which processor to schedule for. Since there is no difference between ! 62: a R2000 and R3000 in terms of the scheduler, we collapse them into ! 63: just an R3000. The elements of the enumeration must match exactly ! 64: the cpu attribute in the mips.md machine description. */ ! 65: ! 66: enum processor_type { ! 67: PROCESSOR_DEFAULT, ! 68: PROCESSOR_R3000, ! 69: PROCESSOR_R6000, ! 70: PROCESSOR_R4000 ! 71: }; ! 72: ! 73: /* Recast the cpu class to be the cpu attribute. */ ! 74: #define mips_cpu_attr ((enum attr_cpu)mips_cpu) ! 75: ! 76: /* Whether to emit abicalls code sequences or not. */ ! 77: ! 78: enum mips_abicalls_type { ! 79: MIPS_ABICALLS_NO, ! 80: MIPS_ABICALLS_YES ! 81: }; ! 82: ! 83: /* Recast the abicalls class to be the abicalls attribute. */ ! 84: #define mips_abicalls_attr ((enum attr_abicalls)mips_abicalls) ! 85: ! 86: /* Which type of block move to do (whether or not the last store is ! 87: split out so it can fill a branch delay slot). */ ! 88: ! 89: enum block_move_type { ! 90: BLOCK_MOVE_NORMAL, /* generate complete block move */ ! 91: BLOCK_MOVE_NOT_LAST, /* generate all but last store */ ! 92: BLOCK_MOVE_LAST /* generate just the last store */ ! 93: }; ! 94: ! 95: extern char mips_reg_names[][8]; /* register names (a0 vs. $4). */ ! 96: extern char mips_print_operand_punct[]; /* print_operand punctuation chars */ ! 97: extern char *current_function_name; /* current function being compiled */ ! 98: extern char *current_function_file; /* filename current function is in */ ! 99: extern int num_source_filenames; /* current .file # */ ! 100: extern int inside_function; /* != 0 if inside of a function */ ! 101: extern int ignore_line_number; /* != 0 if we are to ignore next .loc */ ! 102: extern int file_in_function_warning; /* warning given about .file in func */ ! 103: extern int sdb_label_count; /* block start/end next label # */ ! 104: extern int mips_section_threshold; /* # bytes of data/sdata cutoff */ ! 105: extern int g_switch_value; /* value of the -G xx switch */ ! 106: extern int g_switch_set; /* whether -G xx was passed. */ ! 107: extern int sym_lineno; /* sgi next label # for each stmt */ ! 108: extern int set_noreorder; /* # of nested .set noreorder's */ ! 109: extern int set_nomacro; /* # of nested .set nomacro's */ ! 110: extern int set_noat; /* # of nested .set noat's */ ! 111: extern int set_volatile; /* # of nested .set volatile's */ ! 112: extern int mips_branch_likely; /* emit 'l' after br (branch likely) */ ! 113: extern int mips_dbx_regno[]; /* Map register # to debug register # */ ! 114: extern char mips_rtx_classify[]; /* classify an RTX code */ ! 115: extern struct rtx_def *branch_cmp[2]; /* operands for compare */ ! 116: extern enum cmp_type branch_type; /* what type of branch to use */ ! 117: extern enum processor_type mips_cpu; /* which cpu are we scheduling for */ ! 118: extern enum mips_abicalls_type mips_abicalls;/* for svr4 abi pic calls */ ! 119: extern int mips_isa; /* architectural level */ ! 120: extern char *mips_cpu_string; /* for -mcpu=<xxx> */ ! 121: extern char *mips_isa_string; /* for -mips{1,2,3} */ ! 122: extern int dslots_load_total; /* total # load related delay slots */ ! 123: extern int dslots_load_filled; /* # filled load delay slots */ ! 124: extern int dslots_jump_total; /* total # jump related delay slots */ ! 125: extern int dslots_jump_filled; /* # filled jump delay slots */ ! 126: extern int dslots_number_nops; /* # of nops needed by previous insn */ ! 127: extern int num_refs[3]; /* # 1/2/3 word references */ ! 128: extern struct rtx_def *mips_load_reg; /* register to check for load delay */ ! 129: extern struct rtx_def *mips_load_reg2; /* 2nd reg to check for load delay */ ! 130: extern struct rtx_def *mips_load_reg3; /* 3rd reg to check for load delay */ ! 131: extern struct rtx_def *mips_load_reg4; /* 4th reg to check for load delay */ ! 132: ! 133: /* Functions within mips.c that we reference. */ ! 134: ! 135: extern void abort_with_insn (); ! 136: extern int arith32_operand (); ! 137: extern int arith_operand (); ! 138: extern int cmp_op (); ! 139: extern int cmp2_op (); ! 140: extern long compute_frame_size (); ! 141: extern int epilogue_reg_mentioned_p (); ! 142: extern void expand_block_move (); ! 143: extern int equality_op (); ! 144: extern int fcmp_op (); ! 145: extern void final_prescan_insn (); ! 146: extern int fpsw_register_operand (); ! 147: extern struct rtx_def * function_arg (); ! 148: extern void function_arg_advance (); ! 149: extern int function_arg_partial_nregs (); ! 150: extern void function_epilogue (); ! 151: extern void function_prologue (); ! 152: extern void gen_conditional_branch (); ! 153: extern struct rtx_def * gen_int_relational (); ! 154: extern void init_cumulative_args (); ! 155: extern int large_int (); ! 156: extern int md_register_operand (); ! 157: extern int mips_address_cost (); ! 158: extern void mips_asm_file_end (); ! 159: extern void mips_asm_file_start (); ! 160: extern int mips_const_double_ok (); ! 161: extern void mips_count_memory_refs (); ! 162: extern int mips_debugger_offset (); ! 163: extern void mips_declare_object (); ! 164: extern int mips_epilogue_delay_slots (); ! 165: extern void mips_expand_epilogue (); ! 166: extern void mips_expand_prologue (); ! 167: extern char *mips_fill_delay_slot (); ! 168: extern char *mips_move_1word (); ! 169: extern char *mips_move_2words (); ! 170: extern void mips_output_double (); ! 171: extern int mips_output_external (); ! 172: extern void mips_output_float (); ! 173: extern void mips_output_filename (); ! 174: extern void mips_output_lineno (); ! 175: extern char *output_block_move (); ! 176: extern void override_options (); ! 177: extern int pc_or_label_operand (); ! 178: extern void print_operand_address (); ! 179: extern void print_operand (); ! 180: extern void print_options (); ! 181: extern int reg_or_0_operand (); ! 182: extern int simple_epilogue_p (); ! 183: extern int simple_memory_operand (); ! 184: extern int small_int (); ! 185: extern void trace(); ! 186: extern int uns_arith_operand (); ! 187: extern int uns_cmp_op (); ! 188: ! 189: /* Recognition functions that return if a condition is true. */ ! 190: extern int address_operand (); ! 191: extern int const_double_operand (); ! 192: extern int const_int_operand (); ! 193: extern int general_operand (); ! 194: extern int immediate_operand (); ! 195: extern int memory_address_p (); ! 196: extern int memory_operand (); ! 197: extern int nonimmediate_operand (); ! 198: extern int nonmemory_operand (); ! 199: extern int register_operand (); ! 200: extern int scratch_operand (); ! 201: ! 202: /* Functions to change what output section we are using. */ ! 203: extern void data_section (); ! 204: extern void rdata_section (); ! 205: extern void readonly_data_section (); ! 206: extern void sdata_section (); ! 207: extern void text_section (); ! 208: ! 209: /* Functions in the rest of the compiler that we reference. */ ! 210: extern void abort_with_insn (); ! 211: extern void debug_rtx (); ! 212: extern void fatal_io_error (); ! 213: extern int get_frame_size (); ! 214: extern int offsettable_address_p (); ! 215: extern void output_address (); ! 216: extern char *permalloc (); ! 217: extern int reg_mentioned_p (); ! 218: ! 219: /* Functions in the standard library that we reference. */ ! 220: extern int atoi (); ! 221: extern char *getenv (); ! 222: extern char *mktemp (); ! 223: ! 224: ! 225: /* Stubs for half-pic support if not OSF/1 reference platform. */ ! 226: ! 227: #ifndef HALF_PIC_P ! 228: #define HALF_PIC_P() 0 ! 229: #define HALF_PIC_NUMBER_PTRS 0 ! 230: #define HALF_PIC_NUMBER_REFS 0 ! 231: #define HALF_PIC_ENCODE(DECL) ! 232: #define HALF_PIC_DECLARE(NAME) ! 233: #define HALF_PIC_INIT() error ("half-pic init called on systems that don't support it.") ! 234: #define HALF_PIC_ADDRESS_P(X) 0 ! 235: #define HALF_PIC_PTR(X) X ! 236: #define HALF_PIC_FINISH(STREAM) ! 237: #endif ! 238: ! 239: ! 240: /* Run-time compilation parameters selecting different hardware subsets. */ ! 241: ! 242: /* Macros used in the machine description to test the flags. */ ! 243: ! 244: /* Bits for real switches */ ! 245: #define MASK_INT64 0x00000001 /* ints are 64 bits */ ! 246: #define MASK_LONG64 0x00000002 /* longs are 64 bits */ ! 247: #define MASK_LLONG128 0x00000004 /* long longs are 128 bits */ ! 248: #define MASK_GPOPT 0x00000008 /* Optimize for global pointer */ ! 249: #define MASK_GAS 0x00000010 /* Gas used instead of MIPS as */ ! 250: #define MASK_NAME_REGS 0x00000020 /* Use MIPS s/w reg name convention */ ! 251: #define MASK_STATS 0x00000040 /* print statistics to stderr */ ! 252: #define MASK_MEMCPY 0x00000080 /* call memcpy instead of inline code*/ ! 253: #define MASK_SOFT_FLOAT 0x00000100 /* software floating point */ ! 254: #define MASK_FLOAT64 0x00000200 /* fp registers are 64 bits */ ! 255: #define MASK_ABICALLS 0x00000400 /* emit .abicalls/.cprestore/.cpload */ ! 256: #define MASK_HALF_PIC 0x00000800 /* Emit OSF-style pic refs to externs*/ ! 257: #define MASK_LONG_CALLS 0x00001000 /* Always call through a register */ ! 258: #define MASK_UNUSED1 0x00002000 ! 259: #define MASK_UNUSED2 0x00004000 ! 260: #define MASK_UNUSED3 0x00008000 ! 261: #define MASK_UNUSED4 0x00010000 ! 262: #define MASK_UNUSED5 0x00020000 ! 263: #define MASK_UNUSED6 0x00040000 ! 264: #define MASK_UNUSED7 0x00080000 ! 265: ! 266: /* Dummy switches used only in spec's*/ ! 267: #define MASK_MIPS_TFILE 0x00000000 /* flag for mips-tfile usage */ ! 268: ! 269: /* Debug switches, not documented */ ! 270: #define MASK_DEBUG 0x40000000 /* Eliminate version # in .s file */ ! 271: #define MASK_DEBUG_A 0x20000000 /* don't allow <label>($reg) addrs */ ! 272: #define MASK_DEBUG_B 0x10000000 /* GO_IF_LEGITIMATE_ADDRESS debug */ ! 273: #define MASK_DEBUG_C 0x08000000 /* don't expand seq, etc. */ ! 274: #define MASK_DEBUG_D 0x04000000 /* don't do define_split's */ ! 275: #define MASK_DEBUG_E 0x02000000 /* function_arg debug */ ! 276: #define MASK_DEBUG_F 0x01000000 /* don't try to suppress load nop's */ ! 277: #define MASK_DEBUG_G 0x00800000 /* don't support 64 bit arithmetic */ ! 278: #define MASK_DEBUG_H 0x00400000 /* allow ints in FP registers */ ! 279: #define MASK_DEBUG_I 0x00200000 /* unused */ ! 280: #define MASK_DEBUG_J 0x00100000 /* unused */ ! 281: ! 282: /* r4000 64 bit sizes */ ! 283: #define TARGET_INT64 (target_flags & MASK_INT64) ! 284: #define TARGET_LONG64 (target_flags & MASK_LONG64) ! 285: #define TARGET_LLONG128 (target_flags & MASK_LLONG128) ! 286: #define TARGET_FLOAT64 (target_flags & MASK_FLOAT64) ! 287: ! 288: /* Mips vs. GNU assembler */ ! 289: #define TARGET_GAS (target_flags & MASK_GAS) ! 290: #define TARGET_UNIX_ASM (!TARGET_GAS) ! 291: #define TARGET_MIPS_AS TARGET_UNIX_ASM ! 292: ! 293: /* Debug Mode */ ! 294: #define TARGET_DEBUG_MODE (target_flags & MASK_DEBUG) ! 295: #define TARGET_DEBUG_A_MODE (target_flags & MASK_DEBUG_A) ! 296: #define TARGET_DEBUG_B_MODE (target_flags & MASK_DEBUG_B) ! 297: #define TARGET_DEBUG_C_MODE (target_flags & MASK_DEBUG_C) ! 298: #define TARGET_DEBUG_D_MODE (target_flags & MASK_DEBUG_D) ! 299: #define TARGET_DEBUG_E_MODE (target_flags & MASK_DEBUG_E) ! 300: #define TARGET_DEBUG_F_MODE (target_flags & MASK_DEBUG_F) ! 301: #define TARGET_DEBUG_G_MODE (target_flags & MASK_DEBUG_G) ! 302: #define TARGET_DEBUG_H_MODE (target_flags & MASK_DEBUG_H) ! 303: #define TARGET_DEBUG_I_MODE (target_flags & MASK_DEBUG_I) ! 304: #define TARGET_DEBUG_J_MODE (target_flags & MASK_DEBUG_J) ! 305: ! 306: /* Reg. Naming in .s ($21 vs. $a0) */ ! 307: #define TARGET_NAME_REGS (target_flags & MASK_NAME_REGS) ! 308: ! 309: /* Optimize for Sdata/Sbss */ ! 310: #define TARGET_GP_OPT (target_flags & MASK_GPOPT) ! 311: ! 312: /* print program statistics */ ! 313: #define TARGET_STATS (target_flags & MASK_STATS) ! 314: ! 315: /* call memcpy instead of inline code */ ! 316: #define TARGET_MEMCPY (target_flags & MASK_MEMCPY) ! 317: ! 318: /* .abicalls, etc from Pyramid V.4 */ ! 319: #define TARGET_ABICALLS (target_flags & MASK_ABICALLS) ! 320: ! 321: /* OSF pic references to externs */ ! 322: #define TARGET_HALF_PIC (target_flags & MASK_HALF_PIC) ! 323: ! 324: /* software floating point */ ! 325: #define TARGET_SOFT_FLOAT (target_flags & MASK_SOFT_FLOAT) ! 326: #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT) ! 327: ! 328: /* always call through a register */ ! 329: #define TARGET_LONG_CALLS (target_flags & MASK_LONG_CALLS) ! 330: ! 331: /* Macro to define tables used to set the flags. ! 332: This is a list in braces of pairs in braces, ! 333: each pair being { "NAME", VALUE } ! 334: where VALUE is the bits to set or minus the bits to clear. ! 335: An empty string NAME is used to identify the default VALUE. */ ! 336: ! 337: #define TARGET_SWITCHES \ ! 338: { \ ! 339: {"int64", MASK_INT64 | MASK_LONG64}, \ ! 340: {"long64", MASK_LONG64}, \ ! 341: {"longlong128", MASK_INT64 | MASK_LONG64 | MASK_LLONG128}, \ ! 342: {"mips-as", -MASK_GAS}, \ ! 343: {"gas", MASK_GAS}, \ ! 344: {"rnames", MASK_NAME_REGS}, \ ! 345: {"no-rnames", -MASK_NAME_REGS}, \ ! 346: {"gpOPT", MASK_GPOPT}, \ ! 347: {"gpopt", MASK_GPOPT}, \ ! 348: {"no-gpOPT", -MASK_GPOPT}, \ ! 349: {"no-gpopt", -MASK_GPOPT}, \ ! 350: {"stats", MASK_STATS}, \ ! 351: {"no-stats", -MASK_STATS}, \ ! 352: {"memcpy", MASK_MEMCPY}, \ ! 353: {"no-memcpy", -MASK_MEMCPY}, \ ! 354: {"mips-tfile", MASK_MIPS_TFILE}, \ ! 355: {"no-mips-tfile", -MASK_MIPS_TFILE}, \ ! 356: {"soft-float", MASK_SOFT_FLOAT}, \ ! 357: {"hard-float", -MASK_SOFT_FLOAT}, \ ! 358: {"fp64", MASK_FLOAT64}, \ ! 359: {"fp32", -MASK_FLOAT64}, \ ! 360: {"abicalls", MASK_ABICALLS}, \ ! 361: {"no-abicalls", -MASK_ABICALLS}, \ ! 362: {"half-pic", MASK_HALF_PIC}, \ ! 363: {"no-half-pic", -MASK_HALF_PIC}, \ ! 364: {"long-calls", MASK_LONG_CALLS}, \ ! 365: {"no-long-calls", -MASK_LONG_CALLS}, \ ! 366: {"debug", MASK_DEBUG}, \ ! 367: {"debuga", MASK_DEBUG_A}, \ ! 368: {"debugb", MASK_DEBUG_B}, \ ! 369: {"debugc", MASK_DEBUG_C}, \ ! 370: {"debugd", MASK_DEBUG_D}, \ ! 371: {"debuge", MASK_DEBUG_E}, \ ! 372: {"debugf", MASK_DEBUG_F}, \ ! 373: {"debugg", MASK_DEBUG_G}, \ ! 374: {"debugh", MASK_DEBUG_H}, \ ! 375: {"debugi", MASK_DEBUG_I}, \ ! 376: {"debugj", MASK_DEBUG_J}, \ ! 377: {"", TARGET_DEFAULT | TARGET_CPU_DEFAULT} \ ! 378: } ! 379: ! 380: /* Default target_flags if no switches are specified */ ! 381: ! 382: #ifndef TARGET_DEFAULT ! 383: #define TARGET_DEFAULT 0 ! 384: #endif ! 385: ! 386: #ifndef TARGET_CPU_DEFAULT ! 387: #define TARGET_CPU_DEFAULT 0 ! 388: #endif ! 389: ! 390: /* This macro is similar to `TARGET_SWITCHES' but defines names of ! 391: command options that have values. Its definition is an ! 392: initializer with a subgrouping for each command option. ! 393: ! 394: Each subgrouping contains a string constant, that defines the ! 395: fixed part of the option name, and the address of a variable. ! 396: The variable, type `char *', is set to the variable part of the ! 397: given option if the fixed part matches. The actual option name ! 398: is made by appending `-m' to the specified name. ! 399: ! 400: Here is an example which defines `-mshort-data-NUMBER'. If the ! 401: given option is `-mshort-data-512', the variable `m88k_short_data' ! 402: will be set to the string `"512"'. ! 403: ! 404: extern char *m88k_short_data; ! 405: #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */ ! 406: ! 407: #define TARGET_OPTIONS \ ! 408: { \ ! 409: { "cpu=", &mips_cpu_string }, \ ! 410: { "ips", &mips_isa_string } \ ! 411: } ! 412: ! 413: /* Macros to decide whether certain features are available or not, ! 414: depending on the instruction set architecture level. */ ! 415: ! 416: #define BRANCH_LIKELY_P() (mips_isa >= 2) ! 417: #define HAVE_64BIT_P() (mips_isa >= 3) ! 418: #define HAVE_SQRT_P() (mips_isa >= 2) ! 419: ! 420: ! 421: /* Switch Recognition by gcc.c. Add -G xx support */ ! 422: ! 423: #ifdef SWITCH_TAKES_ARG ! 424: #undef SWITCH_TAKES_ARG ! 425: #endif ! 426: ! 427: #define SWITCH_TAKES_ARG(CHAR) \ ! 428: ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \ ! 429: || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \ ! 430: || (CHAR) == 'I' || (CHAR) == 'm' \ ! 431: || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'G') ! 432: ! 433: /* Sometimes certain combinations of command options do not make sense ! 434: on a particular target machine. You can define a macro ! 435: `OVERRIDE_OPTIONS' to take account of this. This macro, if ! 436: defined, is executed once just after all the command options have ! 437: been parsed. ! 438: ! 439: On the MIPS, it is used to handle -G. We also use it to set up all ! 440: of the tables referenced in the other macros. */ ! 441: ! 442: #define OVERRIDE_OPTIONS override_options () ! 443: ! 444: /* Zero or more C statements that may conditionally modify two ! 445: variables `fixed_regs' and `call_used_regs' (both of type `char ! 446: []') after they have been initialized from the two preceding ! 447: macros. ! 448: ! 449: This is necessary in case the fixed or call-clobbered registers ! 450: depend on target flags. ! 451: ! 452: You need not define this macro if it has no work to do. ! 453: ! 454: If the usage of an entire class of registers depends on the target ! 455: flags, you may indicate this to GCC by using this macro to modify ! 456: `fixed_regs' and `call_used_regs' to 1 for each of the registers in ! 457: the classes which should not be used by GCC. Also define the macro ! 458: `REG_CLASS_FROM_LETTER' to return `NO_REGS' if it is called with a ! 459: letter for a class that shouldn't be used. ! 460: ! 461: (However, if this class is not included in `GENERAL_REGS' and all ! 462: of the insn patterns whose constraints permit this class are ! 463: controlled by target switches, then GCC will automatically avoid ! 464: using these registers when the target switches are opposed to ! 465: them.) */ ! 466: ! 467: #define CONDITIONAL_REGISTER_USAGE \ ! 468: do \ ! 469: { \ ! 470: if (!TARGET_HARD_FLOAT) \ ! 471: { \ ! 472: int regno; \ ! 473: \ ! 474: for (regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++) \ ! 475: fixed_regs[regno] = call_used_regs[regno] = 1; \ ! 476: } \ ! 477: } \ ! 478: while (0) ! 479: ! 480: ! 481: /* Some machines may desire to change what optimizations are ! 482: performed for various optimization levels. This macro, if ! 483: defined, is executed once just after the optimization level is ! 484: determined and before the remainder of the command options have ! 485: been parsed. Values set in this macro are used as the default ! 486: values for the other command line options. ! 487: ! 488: LEVEL is the optimization level specified; 2 if -O2 is ! 489: specified, 1 if -O is specified, and 0 if neither is specified. */ ! 490: ! 491: #define OPTIMIZATION_OPTIONS(LEVEL) \ ! 492: { \ ! 493: if (LEVEL) \ ! 494: { \ ! 495: flag_omit_frame_pointer = TRUE; \ ! 496: flag_schedule_insns_after_reload = TRUE; \ ! 497: target_flags |= MASK_GPOPT; \ ! 498: } \ ! 499: } ! 500: ! 501: ! 502: /* Complain about missing specs and predefines that should be defined in each ! 503: of the target tm files to override the defaults. This is mostly a place- ! 504: holder until I can get each of the files updated [mm]. */ ! 505: ! 506: #if defined(OSF_OS) \ ! 507: || defined(DECSTATION) \ ! 508: || defined(SGI_TARGET) \ ! 509: || defined(MIPS_NEWS) \ ! 510: || defined(MIPS_SYSV) \ ! 511: || defined(MIPS_SVR4) \ ! 512: || defined(MIPS_BSD43) ! 513: ! 514: #ifndef CPP_PREDEFINES ! 515: #error "Define CPP_PREDEFINES in the appropriate tm.h file" ! 516: #endif ! 517: ! 518: #ifndef CPP_SPEC ! 519: #error "Define CPP_SPEC in the appropriate tm.h file" ! 520: #endif ! 521: ! 522: #ifndef LINK_SPEC ! 523: #error "Define LINK_SPEC in the appropriate tm.h file" ! 524: #endif ! 525: ! 526: #ifndef LIB_SPEC ! 527: #error "Define LIB_SPEC in the appropriate tm.h file" ! 528: #endif ! 529: ! 530: #ifndef STARTFILE_SPEC ! 531: #error "Define STARTFILE_SPEC in the appropriate tm.h file" ! 532: #endif ! 533: ! 534: #ifndef MACHINE_TYPE ! 535: #error "Define MACHINE_TYPE in the appropriate tm.h file" ! 536: #endif ! 537: #endif ! 538: ! 539: /* Tell collect what flags to pass to nm. */ ! 540: #ifndef NM_FLAGS ! 541: #define NM_FLAGS "-Bp" ! 542: #endif ! 543: ! 544: ! 545: /* Names to predefine in the preprocessor for this target machine. */ ! 546: ! 547: #ifndef CPP_PREDEFINES ! 548: #define CPP_PREDEFINES "-Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000 -DSYSTYPE_BSD43 \ ! 549: -D_mips -D_unix -D_host_mips -D_MIPSEB -D_R3000 -D_SYSTYPE_BSD43 \ ! 550: -Asystem(unix) -Asystem(bsd) -Acpu(mips) -Amachine(mips)" ! 551: #endif ! 552: ! 553: /* Extra switches sometimes passed to the assembler. */ ! 554: ! 555: #ifndef ASM_SPEC ! 556: #define ASM_SPEC "\ ! 557: %{!mgas: \ ! 558: %{!mrnames: %{!.s:-nocpp} %{.s: %{cpp} %{nocpp}}} \ ! 559: %{pipe: %e-pipe is not supported.} \ ! 560: %{EB} %{!EB:-EB} \ ! 561: %{EL: %e-EL not supported} \ ! 562: %{mips1} %{mips2} %{mips3} \ ! 563: %{noasmopt:-O0} \ ! 564: %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}} \ ! 565: %{g} %{g0} %{g1} %{g2} %{g3} %{v} %{K} \ ! 566: %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \ ! 567: %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \ ! 568: %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \ ! 569: %{gcoff:-g} %{gstabs0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3}} \ ! 570: %{G*}" ! 571: ! 572: #endif /* ASM_SPEC */ ! 573: ! 574: /* Specify to run a post-processor, mips-tfile after the assembler ! 575: has run to stuff the mips debug information into the object file. ! 576: This is needed because the $#!%^ MIPS assembler provides no way ! 577: of specifying such information in the assembly file. If we are ! 578: cross compiling, disable mips-tfile unless the user specifies ! 579: -mmips-tfile. */ ! 580: ! 581: #ifndef ASM_FINAL_SPEC ! 582: #if ((TARGET_CPU_DEFAULT | TARGET_DEFAULT) & MASK_GAS) != 0 || defined (CROSS_COMPILE) ! 583: /* GAS */ ! 584: #define ASM_FINAL_SPEC "\ ! 585: %{mmips-as: %{!mno-mips-tfile: \ ! 586: \n mips-tfile %{v*: -v} \ ! 587: %{K: -I %b.o~} \ ! 588: %{!K: %{save-temps: -I %b.o~}} \ ! 589: %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ ! 590: %{.s:%i} %{!.s:%g.s}}}" ! 591: ! 592: #else /* not GAS, clean up after MIPS assembler */ ! 593: #define ASM_FINAL_SPEC "\ ! 594: %{!mgas: %{!mno-mips-tfile: \ ! 595: \n mips-tfile %{v*: -v} \ ! 596: %{K: -I %b.o~} \ ! 597: %{!K: %{save-temps: -I %b.o~}} \ ! 598: %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \ ! 599: %{.s:%i} %{!.s:%g.s}}}" ! 600: ! 601: #endif /* GAS */ ! 602: #endif /* ASM_FINAL_SPEC */ ! 603: ! 604: /* Redefinition of libraries used. Mips doesn't support normal ! 605: UNIX style profiling via calling _mcount. It does offer ! 606: profiling that samples the PC, so do what we can... */ ! 607: ! 608: #ifndef LIB_SPEC ! 609: #define LIB_SPEC "%{pg:-lprof1} %{p:-lprof1} -lc" ! 610: #endif ! 611: ! 612: /* Extra switches sometimes passed to the linker. */ ! 613: ! 614: #ifndef LINK_SPEC ! 615: #define LINK_SPEC "\ ! 616: %{G*} \ ! 617: %{!mgas: \ ! 618: %{pipe: %e-pipe is not supported.} \ ! 619: %{EB} %{!EB:-EB} \ ! 620: %{EL: %e-EL not supported} \ ! 621: %{mips1} %{mips2} %{mips3} \ ! 622: %{bestGnum} %{shared} %{non_shared}}" ! 623: #endif /* LINK_SPEC defined */ ! 624: ! 625: /* Specs for the compiler proper */ ! 626: ! 627: #ifndef CC1_SPEC ! 628: #define CC1_SPEC "\ ! 629: %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \ ! 630: %{G*} \ ! 631: %{pic-none: -mno-half-pic} \ ! 632: %{pic-lib: -mhalf-pic} \ ! 633: %{pic-extern: -mhalf-pic} \ ! 634: %{pic-calls: -mhalf-pic} \ ! 635: %{save-temps: }" ! 636: #endif ! 637: ! 638: /* Preprocessor specs */ ! 639: ! 640: #ifndef CPP_SPEC ! 641: #define CPP_SPEC "\ ! 642: %{.cc: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 643: %{.cxx: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 644: %{.C: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 645: %{.m: -D__LANGUAGE_OBJECTIVE_C -D_LANGUAGE_OBJECTIVE_C} \ ! 646: %{.S: -D__LANGUAGE_ASSEMBLY -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \ ! 647: %{.s: -D__LANGUAGE_ASSEMBLY -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \ ! 648: %{!.S:%{!.s: -D__LANGUAGE_C -D_LANGUAGE_C %{!ansi:-DLANGUAGE_C}}}" ! 649: #endif ! 650: ! 651: /* If defined, this macro is an additional prefix to try after ! 652: `STANDARD_EXEC_PREFIX'. */ ! 653: ! 654: #ifndef MD_EXEC_PREFIX ! 655: #define MD_EXEC_PREFIX "/usr/lib/cmplrs/cc/" ! 656: #endif ! 657: ! 658: #ifndef MD_STARTFILE_PREFIX ! 659: #define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/" ! 660: #endif ! 661: ! 662: ! 663: /* Print subsidiary information on the compiler version in use. */ ! 664: ! 665: #define MIPS_VERSION "[AL 1.1, MM 40]" ! 666: ! 667: #ifndef MACHINE_TYPE ! 668: #define MACHINE_TYPE "BSD Mips" ! 669: #endif ! 670: ! 671: #ifndef TARGET_VERSION_INTERNAL ! 672: #define TARGET_VERSION_INTERNAL(STREAM) \ ! 673: fprintf (STREAM, " %s %s", MIPS_VERSION, MACHINE_TYPE) ! 674: #endif ! 675: ! 676: #ifndef TARGET_VERSION ! 677: #define TARGET_VERSION TARGET_VERSION_INTERNAL (stderr) ! 678: #endif ! 679: ! 680: ! 681: #define SDB_DEBUGGING_INFO /* generate info for mips-tfile */ ! 682: #define DBX_DEBUGGING_INFO /* generate stabs (OSF/rose) */ ! 683: #define MIPS_DEBUGGING_INFO /* MIPS specific debugging info */ ! 684: ! 685: #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */ ! 686: #define PREFERRED_DEBUGGING_TYPE ((len > 1 && !strncmp (str, "ggdb", len)) ? DBX_DEBUG : SDB_DEBUG) ! 687: #endif ! 688: ! 689: /* By default, turn on GDB extensions. */ ! 690: #define DEFAULT_GDB_EXTENSIONS 1 ! 691: ! 692: /* If we are passing smuggling stabs through the MIPS ECOFF object ! 693: format, put a comment in front of the .stab<x> operation so ! 694: that the MIPS assembler does not choke. The mips-tfile program ! 695: will correctly put the stab into the object file. */ ! 696: ! 697: #define ASM_STABS_OP ((TARGET_GAS) ? ".stabs" : " #.stabs") ! 698: #define ASM_STABN_OP ((TARGET_GAS) ? ".stabn" : " #.stabn") ! 699: #define ASM_STABD_OP ((TARGET_GAS) ? ".stabd" : " #.stabd") ! 700: ! 701: /* Forward references to tags are allowed. */ ! 702: #define SDB_ALLOW_FORWARD_REFERENCES ! 703: ! 704: /* Unknown tags are also allowed. */ ! 705: #define SDB_ALLOW_UNKNOWN_REFERENCES ! 706: ! 707: /* On Sun 4, this limit is 2048. We use 1500 to be safe, ! 708: since the length can run past this up to a continuation point. */ ! 709: #define DBX_CONTIN_LENGTH 1500 ! 710: ! 711: ! 712: /* How to renumber registers for dbx and gdb. */ ! 713: #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ] ! 714: ! 715: ! 716: /* Overrides for the COFF debug format. */ ! 717: #define PUT_SDB_SCL(a) \ ! 718: do { \ ! 719: extern FILE *asm_out_text_file; \ ! 720: fprintf (asm_out_text_file, "\t.scl\t%d;", (a)); \ ! 721: } while (0) ! 722: ! 723: #define PUT_SDB_INT_VAL(a) \ ! 724: do { \ ! 725: extern FILE *asm_out_text_file; \ ! 726: fprintf (asm_out_text_file, "\t.val\t%d;", (a)); \ ! 727: } while (0) ! 728: ! 729: #define PUT_SDB_VAL(a) \ ! 730: do { \ ! 731: extern FILE *asm_out_text_file; \ ! 732: fputs ("\t.val\t", asm_out_text_file); \ ! 733: output_addr_const (asm_out_text_file, (a)); \ ! 734: fputc (';', asm_out_text_file); \ ! 735: } while (0) ! 736: ! 737: #define PUT_SDB_DEF(a) \ ! 738: do { \ ! 739: extern FILE *asm_out_text_file; \ ! 740: fprintf (asm_out_text_file, "\t%s.def\t", \ ! 741: (TARGET_GAS) ? "" : "#"); \ ! 742: ASM_OUTPUT_LABELREF (asm_out_text_file, a); \ ! 743: fputc (';', asm_out_text_file); \ ! 744: } while (0) ! 745: ! 746: #define PUT_SDB_PLAIN_DEF(a) \ ! 747: do { \ ! 748: extern FILE *asm_out_text_file; \ ! 749: fprintf (asm_out_text_file, "\t%s.def\t.%s;", \ ! 750: (TARGET_GAS) ? "" : "#", (a)); \ ! 751: } while (0) ! 752: ! 753: #define PUT_SDB_ENDEF \ ! 754: do { \ ! 755: extern FILE *asm_out_text_file; \ ! 756: fprintf (asm_out_text_file, "\t.endef\n"); \ ! 757: } while (0) ! 758: ! 759: #define PUT_SDB_TYPE(a) \ ! 760: do { \ ! 761: extern FILE *asm_out_text_file; \ ! 762: fprintf (asm_out_text_file, "\t.type\t0x%x;", (a)); \ ! 763: } while (0) ! 764: ! 765: #define PUT_SDB_SIZE(a) \ ! 766: do { \ ! 767: extern FILE *asm_out_text_file; \ ! 768: fprintf (asm_out_text_file, "\t.size\t%d;", (a)); \ ! 769: } while (0) ! 770: ! 771: #define PUT_SDB_DIM(a) \ ! 772: do { \ ! 773: extern FILE *asm_out_text_file; \ ! 774: fprintf (asm_out_text_file, "\t.dim\t%d;", (a)); \ ! 775: } while (0) ! 776: ! 777: #ifndef PUT_SDB_START_DIM ! 778: #define PUT_SDB_START_DIM \ ! 779: do { \ ! 780: extern FILE *asm_out_text_file; \ ! 781: fprintf (asm_out_text_file, "\t.dim\t"); \ ! 782: } while (0) ! 783: #endif ! 784: ! 785: #ifndef PUT_SDB_NEXT_DIM ! 786: #define PUT_SDB_NEXT_DIM(a) \ ! 787: do { \ ! 788: extern FILE *asm_out_text_file; \ ! 789: fprintf (asm_out_text_file, "%d,", a); \ ! 790: } while (0) ! 791: #endif ! 792: ! 793: #ifndef PUT_SDB_LAST_DIM ! 794: #define PUT_SDB_LAST_DIM(a) \ ! 795: do { \ ! 796: extern FILE *asm_out_text_file; \ ! 797: fprintf (asm_out_text_file, "%d;", a); \ ! 798: } while (0) ! 799: #endif ! 800: ! 801: #define PUT_SDB_TAG(a) \ ! 802: do { \ ! 803: extern FILE *asm_out_text_file; \ ! 804: fprintf (asm_out_text_file, "\t.tag\t"); \ ! 805: ASM_OUTPUT_LABELREF (asm_out_text_file, a); \ ! 806: fputc (';', asm_out_text_file); \ ! 807: } while (0) ! 808: ! 809: /* For block start and end, we create labels, so that ! 810: later we can figure out where the correct offset is. ! 811: The normal .ent/.end serve well enough for functions, ! 812: so those are just commented out. */ ! 813: ! 814: #define PUT_SDB_BLOCK_START(LINE) \ ! 815: do { \ ! 816: extern FILE *asm_out_text_file; \ ! 817: fprintf (asm_out_text_file, \ ! 818: "$Lb%d:\n\t%s.begin\t$Lb%d\t%d\n", \ ! 819: sdb_label_count, \ ! 820: (TARGET_GAS) ? "" : "#", \ ! 821: sdb_label_count, \ ! 822: (LINE)); \ ! 823: sdb_label_count++; \ ! 824: } while (0) ! 825: ! 826: #define PUT_SDB_BLOCK_END(LINE) \ ! 827: do { \ ! 828: extern FILE *asm_out_text_file; \ ! 829: fprintf (asm_out_text_file, \ ! 830: "$Le%d:\n\t%s.bend\t$Le%d\t%d\n", \ ! 831: sdb_label_count, \ ! 832: (TARGET_GAS) ? "" : "#", \ ! 833: sdb_label_count, \ ! 834: (LINE)); \ ! 835: sdb_label_count++; \ ! 836: } while (0) ! 837: ! 838: #define PUT_SDB_FUNCTION_START(LINE) ! 839: ! 840: #define PUT_SDB_FUNCTION_END(LINE) ! 841: ! 842: #define PUT_SDB_EPILOGUE_END(NAME) ! 843: ! 844: #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \ ! 845: sprintf ((BUFFER), ".%dfake", (NUMBER)); ! 846: ! 847: /* Correct the offset of automatic variables and arguments. Note that ! 848: the MIPS debug format wants all automatic variables and arguments ! 849: to be in terms of the virtual frame pointer (stack pointer before ! 850: any adjustment in the function), while the MIPS 3.0 linker wants ! 851: the frame pointer to be the stack pointer after the initial ! 852: adjustment. */ ! 853: ! 854: #define DEBUGGER_AUTO_OFFSET(X) mips_debugger_offset (X, 0) ! 855: #define DEBUGGER_ARG_OFFSET(OFFSET, X) mips_debugger_offset (X, OFFSET) ! 856: ! 857: ! 858: /* Tell collect that the object format is ECOFF */ ! 859: #ifndef OBJECT_FORMAT_ROSE ! 860: #define OBJECT_FORMAT_COFF /* Object file looks like COFF */ ! 861: #define EXTENDED_COFF /* ECOFF, not normal coff */ ! 862: #endif ! 863: ! 864: #if 0 /* These definitions normally have no effect because ! 865: MIPS systems define USE_COLLECT2, so ! 866: assemble_constructor does nothing anyway. */ ! 867: ! 868: /* Don't use the default definitions, because we don't have gld. ! 869: Also, we don't want stabs when generating ECOFF output. ! 870: Instead we depend on collect to handle these. */ ! 871: ! 872: #define ASM_OUTPUT_CONSTRUCTOR(file, name) ! 873: #define ASM_OUTPUT_DESTRUCTOR(file, name) ! 874: ! 875: #endif /* 0 */ ! 876: ! 877: /* Target machine storage layout */ ! 878: ! 879: /* Define this if most significant bit is lowest numbered ! 880: in instructions that operate on numbered bit-fields. ! 881: */ ! 882: #define BITS_BIG_ENDIAN 0 ! 883: ! 884: /* Define this if most significant byte of a word is the lowest numbered. */ ! 885: #ifndef BYTES_BIG_ENDIAN ! 886: #ifndef DECSTATION ! 887: #define BYTES_BIG_ENDIAN 1 ! 888: #else ! 889: #define BYTES_BIG_ENDIAN 0 ! 890: #endif ! 891: #endif ! 892: ! 893: /* Define this if most significant word of a multiword number is the lowest. */ ! 894: #ifndef WORDS_BIG_ENDIAN ! 895: #ifndef DECSTATION ! 896: #define WORDS_BIG_ENDIAN 1 ! 897: #else ! 898: #define WORDS_BIG_ENDIAN 0 ! 899: #endif ! 900: #endif ! 901: ! 902: /* Define macros to easily access the most and least significant words ! 903: without a lot of #ifdef's. */ ! 904: ! 905: #if WORDS_BIG_ENDIAN ! 906: #define MOST_SIGNIFICANT_WORD 0 ! 907: #define LEAST_SIGNIFICANT_WORD 1 ! 908: ! 909: #else ! 910: #define MOST_SIGNIFICANT_WORD 1 ! 911: #define LEAST_SIGNIFICANT_WORD 0 ! 912: #endif ! 913: ! 914: /* Number of bits in an addressable storage unit */ ! 915: #define BITS_PER_UNIT 8 ! 916: ! 917: /* Width in bits of a "word", which is the contents of a machine register. ! 918: Note that this is not necessarily the width of data type `int'; ! 919: if using 16-bit ints on a 68000, this would still be 32. ! 920: But on a machine with 16-bit registers, this would be 16. */ ! 921: #define BITS_PER_WORD 32 ! 922: ! 923: /* Width of a word, in units (bytes). */ ! 924: #define UNITS_PER_WORD 4 ! 925: ! 926: /* A C expression for the size in bits of the type `int' on the ! 927: target machine. If you don't define this, the default is one ! 928: word. */ ! 929: #define INT_TYPE_SIZE 32 ! 930: ! 931: /* A C expression for the size in bits of the type `short' on the ! 932: target machine. If you don't define this, the default is half a ! 933: word. (If this would be less than one storage unit, it is ! 934: rounded up to one unit.) */ ! 935: #define SHORT_TYPE_SIZE 16 ! 936: ! 937: /* A C expression for the size in bits of the type `long' on the ! 938: target machine. If you don't define this, the default is one ! 939: word. */ ! 940: #define LONG_TYPE_SIZE 32 ! 941: ! 942: /* A C expression for the size in bits of the type `long long' on the ! 943: target machine. If you don't define this, the default is two ! 944: words. */ ! 945: #define LONG_LONG_TYPE_SIZE 64 ! 946: ! 947: /* A C expression for the size in bits of the type `char' on the ! 948: target machine. If you don't define this, the default is one ! 949: quarter of a word. (If this would be less than one storage unit, ! 950: it is rounded up to one unit.) */ ! 951: #define CHAR_TYPE_SIZE BITS_PER_UNIT ! 952: ! 953: /* A C expression for the size in bits of the type `float' on the ! 954: target machine. If you don't define this, the default is one ! 955: word. */ ! 956: #define FLOAT_TYPE_SIZE 32 ! 957: ! 958: /* A C expression for the size in bits of the type `double' on the ! 959: target machine. If you don't define this, the default is two ! 960: words. */ ! 961: #define DOUBLE_TYPE_SIZE 64 ! 962: ! 963: /* A C expression for the size in bits of the type `long double' on ! 964: the target machine. If you don't define this, the default is two ! 965: words. */ ! 966: #define LONG_DOUBLE_TYPE_SIZE 64 ! 967: ! 968: /* Width in bits of a pointer. ! 969: See also the macro `Pmode' defined below. */ ! 970: #define POINTER_SIZE 32 ! 971: ! 972: /* Allocation boundary (in *bits*) for storing pointers in memory. */ ! 973: #define POINTER_BOUNDARY 32 ! 974: ! 975: /* Allocation boundary (in *bits*) for storing arguments in argument list. */ ! 976: #define PARM_BOUNDARY 32 ! 977: ! 978: /* Allocation boundary (in *bits*) for the code of a function. */ ! 979: #define FUNCTION_BOUNDARY 32 ! 980: ! 981: /* Alignment of field after `int : 0' in a structure. */ ! 982: #define EMPTY_FIELD_BOUNDARY 32 ! 983: ! 984: /* Every structure's size must be a multiple of this. */ ! 985: /* 8 is observed right on a DECstation and on riscos 4.02. */ ! 986: #define STRUCTURE_SIZE_BOUNDARY 8 ! 987: ! 988: /* There is no point aligning anything to a rounder boundary than this. */ ! 989: #define BIGGEST_ALIGNMENT 64 ! 990: ! 991: /* Biggest alignment any structure field can require in bits. */ ! 992: #define BIGGEST_FIELD_ALIGNMENT 64 ! 993: ! 994: /* Set this nonzero if move instructions will actually fail to work ! 995: when given unaligned data. */ ! 996: #define STRICT_ALIGNMENT 1 ! 997: ! 998: /* Define this if you wish to imitate the way many other C compilers ! 999: handle alignment of bitfields and the structures that contain ! 1000: them. ! 1001: ! 1002: The behavior is that the type written for a bitfield (`int', ! 1003: `short', or other integer type) imposes an alignment for the ! 1004: entire structure, as if the structure really did contain an ! 1005: ordinary field of that type. In addition, the bitfield is placed ! 1006: within the structure so that it would fit within such a field, ! 1007: not crossing a boundary for it. ! 1008: ! 1009: Thus, on most machines, a bitfield whose type is written as `int' ! 1010: would not cross a four-byte boundary, and would force four-byte ! 1011: alignment for the whole structure. (The alignment used may not ! 1012: be four bytes; it is controlled by the other alignment ! 1013: parameters.) ! 1014: ! 1015: If the macro is defined, its definition should be a C expression; ! 1016: a nonzero value for the expression enables this behavior. */ ! 1017: ! 1018: #define PCC_BITFIELD_TYPE_MATTERS 1 ! 1019: ! 1020: /* If defined, a C expression to compute the alignment given to a ! 1021: constant that is being placed in memory. CONSTANT is the constant ! 1022: and ALIGN is the alignment that the object would ordinarily have. ! 1023: The value of this macro is used instead of that alignment to align ! 1024: the object. ! 1025: ! 1026: If this macro is not defined, then ALIGN is used. ! 1027: ! 1028: The typical use of this macro is to increase alignment for string ! 1029: constants to be word aligned so that `strcpy' calls that copy ! 1030: constants can be done inline. */ ! 1031: ! 1032: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ ! 1033: ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \ ! 1034: && (ALIGN) < BITS_PER_WORD \ ! 1035: ? BITS_PER_WORD \ ! 1036: : (ALIGN)) ! 1037: ! 1038: /* If defined, a C expression to compute the alignment for a static ! 1039: variable. TYPE is the data type, and ALIGN is the alignment that ! 1040: the object would ordinarily have. The value of this macro is used ! 1041: instead of that alignment to align the object. ! 1042: ! 1043: If this macro is not defined, then ALIGN is used. ! 1044: ! 1045: One use of this macro is to increase alignment of medium-size ! 1046: data to make it all fit in fewer cache lines. Another is to ! 1047: cause character arrays to be word-aligned so that `strcpy' calls ! 1048: that copy constants to character arrays can be done inline. */ ! 1049: ! 1050: #undef DATA_ALIGNMENT ! 1051: #define DATA_ALIGNMENT(TYPE, ALIGN) \ ! 1052: ((((ALIGN) < BITS_PER_WORD) \ ! 1053: && (TREE_CODE (TYPE) == ARRAY_TYPE \ ! 1054: || TREE_CODE (TYPE) == UNION_TYPE \ ! 1055: || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) ! 1056: ! 1057: /* Define this macro if an argument declared as `char' or `short' in a ! 1058: prototype should actually be passed as an `int'. In addition to ! 1059: avoiding errors in certain cases of mismatch, it also makes for ! 1060: better code on certain machines. */ ! 1061: ! 1062: #define PROMOTE_PROTOTYPES ! 1063: ! 1064: /* Define if operations between registers always perform the operation ! 1065: on the full register even if a narrower mode is specified. */ ! 1066: #define WORD_REGISTER_OPERATIONS ! 1067: ! 1068: /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD ! 1069: will either zero-extend or sign-extend. The value of this macro should ! 1070: be the code that says which one of the two operations is implicitly ! 1071: done, NIL if none. */ ! 1072: #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND ! 1073: ! 1074: /* Standard register usage. */ ! 1075: ! 1076: /* Number of actual hardware registers. ! 1077: The hardware registers are assigned numbers for the compiler ! 1078: from 0 to just below FIRST_PSEUDO_REGISTER. ! 1079: All registers that the compiler knows about must be given numbers, ! 1080: even those that are not normally considered general registers. ! 1081: ! 1082: On the Mips, we have 32 integer registers, 32 floating point registers ! 1083: and the special registers hi, lo, and fp status. */ ! 1084: ! 1085: #define FIRST_PSEUDO_REGISTER 67 ! 1086: ! 1087: /* 1 for registers that have pervasive standard uses ! 1088: and are not available for the register allocator. ! 1089: ! 1090: On the MIPS, see conventions, page D-2 */ ! 1091: ! 1092: #define FIXED_REGISTERS \ ! 1093: { \ ! 1094: 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 1095: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, \ ! 1096: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 1097: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 1098: 1, 1, 1 \ ! 1099: } ! 1100: ! 1101: ! 1102: /* 1 for registers not available across function calls. ! 1103: These must include the FIXED_REGISTERS and also any ! 1104: registers that can be used without being saved. ! 1105: The latter must include the registers where values are returned ! 1106: and the register where structure-value addresses are passed. ! 1107: Aside from that, you can include as many other registers as you like. */ ! 1108: ! 1109: #define CALL_USED_REGISTERS \ ! 1110: { \ ! 1111: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ ! 1112: 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, \ ! 1113: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ ! 1114: 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 1115: 1, 1, 1 \ ! 1116: } ! 1117: ! 1118: ! 1119: /* Internal macros to classify a register number as to whether it's a ! 1120: general purpose register, a floating point register, a ! 1121: multiply/divide register, or a status register. ! 1122: ! 1123: The macro FP_CALL_REG_P also allows registers $4 and $6 as floating ! 1124: point registers to pass floating point as per MIPS spec. */ ! 1125: ! 1126: #define GP_REG_FIRST 0 ! 1127: #define GP_REG_LAST 31 ! 1128: #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1) ! 1129: #define GP_DBX_FIRST 0 ! 1130: ! 1131: #define FP_REG_FIRST 32 ! 1132: #define FP_REG_LAST 63 ! 1133: #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1) ! 1134: #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32) ! 1135: ! 1136: #define MD_REG_FIRST 64 ! 1137: #define MD_REG_LAST 65 ! 1138: #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1) ! 1139: ! 1140: #define ST_REG_FIRST 66 ! 1141: #define ST_REG_LAST 66 ! 1142: #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1) ! 1143: ! 1144: #define AT_REGNUM (GP_REG_FIRST + 1) ! 1145: #define HI_REGNUM (MD_REG_FIRST + 0) ! 1146: #define LO_REGNUM (MD_REG_FIRST + 1) ! 1147: #define FPSW_REGNUM ST_REG_FIRST ! 1148: ! 1149: #define GP_REG_P(REGNO) ((unsigned) ((REGNO) - GP_REG_FIRST) < GP_REG_NUM) ! 1150: #define FP_REG_P(REGNO) ((unsigned) ((REGNO) - FP_REG_FIRST) < FP_REG_NUM) ! 1151: #define MD_REG_P(REGNO) ((unsigned) ((REGNO) - MD_REG_FIRST) < MD_REG_NUM) ! 1152: #define ST_REG_P(REGNO) ((REGNO) == ST_REG_FIRST) ! 1153: ! 1154: #define FP_CALL_REG_P(REGNO) \ ! 1155: (FP_REG_P (REGNO) \ ! 1156: || (REGNO) == (4 + GP_REG_FIRST) \ ! 1157: || (REGNO) == (6 + GP_REG_FIRST)) ! 1158: ! 1159: /* Return number of consecutive hard regs needed starting at reg REGNO ! 1160: to hold something of mode MODE. ! 1161: This is ordinarily the length in words of a value of mode MODE ! 1162: but can be less for certain modes in special long registers. ! 1163: ! 1164: On the MIPS, all general registers are one word long. Except on ! 1165: the R4000 with the FR bit set, the floating point uses register ! 1166: pairs, with the second register not being allocatable. */ ! 1167: ! 1168: #define HARD_REGNO_NREGS(REGNO, MODE) \ ! 1169: (! FP_REG_P (REGNO) \ ! 1170: ? ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) \ ! 1171: : (((GET_MODE_SIZE (MODE) + (2*UNITS_PER_WORD) - 1) / (2*UNITS_PER_WORD)) \ ! 1172: << (TARGET_FLOAT64 == 0))) ! 1173: ! 1174: /* Value is 1 if hard register REGNO can hold a value of machine-mode ! 1175: MODE. Require that DImode and DFmode be in even registers. For ! 1176: DImode, this makes some of the insns easier to write, since you ! 1177: don't have to worry about a DImode value in registers 3 & 4, ! 1178: producing a result in 4 & 5. ! 1179: ! 1180: To make the code simpler HARD_REGNO_MODE_OK now just references an ! 1181: array built in override_options. Because machmodes.h is not yet ! 1182: included before this file is processed, the MODE bound can't be ! 1183: expressed here. */ ! 1184: ! 1185: extern char mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER]; ! 1186: ! 1187: #define HARD_REGNO_MODE_OK(REGNO, MODE) \ ! 1188: mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ] ! 1189: ! 1190: /* Value is 1 if it is a good idea to tie two pseudo registers ! 1191: when one has mode MODE1 and one has mode MODE2. ! 1192: If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, ! 1193: for any hard reg, then this must be 0 for correct output. */ ! 1194: #define MODES_TIEABLE_P(MODE1, MODE2) \ ! 1195: ((GET_MODE_CLASS (MODE1) == MODE_FLOAT || \ ! 1196: GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT) \ ! 1197: == (GET_MODE_CLASS (MODE2) == MODE_FLOAT || \ ! 1198: GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT)) ! 1199: ! 1200: /* MIPS pc is not overloaded on a register. */ ! 1201: /* #define PC_REGNUM xx */ ! 1202: ! 1203: /* Register to use for pushing function arguments. */ ! 1204: #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29) ! 1205: ! 1206: /* Offset from the stack pointer to the first available location. */ ! 1207: #define STACK_POINTER_OFFSET 0 ! 1208: ! 1209: /* Base register for access to local variables of the function. */ ! 1210: #define FRAME_POINTER_REGNUM (GP_REG_FIRST + 30) ! 1211: ! 1212: /* Value should be nonzero if functions must have frame pointers. ! 1213: Zero means the frame pointer need not be set up (and parms ! 1214: may be accessed via the stack pointer) in functions that seem suitable. ! 1215: This is computed in `reload', in reload1.c. */ ! 1216: #define FRAME_POINTER_REQUIRED (current_function_calls_alloca) ! 1217: ! 1218: /* Base register for access to arguments of the function. */ ! 1219: #define ARG_POINTER_REGNUM GP_REG_FIRST ! 1220: ! 1221: /* Register in which static-chain is passed to a function. */ ! 1222: #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 2) ! 1223: ! 1224: /* If the structure value address is passed in a register, then ! 1225: `STRUCT_VALUE_REGNUM' should be the number of that register. */ ! 1226: /* #define STRUCT_VALUE_REGNUM (GP_REG_FIRST + 4) */ ! 1227: ! 1228: /* If the structure value address is not passed in a register, define ! 1229: `STRUCT_VALUE' as an expression returning an RTX for the place ! 1230: where the address is passed. If it returns 0, the address is ! 1231: passed as an "invisible" first argument. */ ! 1232: #define STRUCT_VALUE ((rtx)0) ! 1233: ! 1234: /* Mips registers used in prologue/epilogue code when the stack frame ! 1235: is larger than 32K bytes. These registers must come from the ! 1236: scratch register set, and not used for passing and returning ! 1237: arguments and any other information used in the calling sequence ! 1238: (such as pic). */ ! 1239: ! 1240: #define MIPS_TEMP1_REGNUM (GP_REG_FIRST + 8) ! 1241: #define MIPS_TEMP2_REGNUM (GP_REG_FIRST + 9) ! 1242: ! 1243: /* Define this macro if it is as good or better to call a constant ! 1244: function address than to call an address kept in a register. */ ! 1245: #define NO_FUNCTION_CSE 1 ! 1246: ! 1247: /* Define this macro if it is as good or better for a function to ! 1248: call itself with an explicit address than to call an address ! 1249: kept in a register. */ ! 1250: #define NO_RECURSIVE_FUNCTION_CSE 1 ! 1251: ! 1252: /* The register number of the register used to address a table of ! 1253: static data addresses in memory. In some cases this register is ! 1254: defined by a processor's "application binary interface" (ABI). ! 1255: When this macro is defined, RTL is generated for this register ! 1256: once, as with the stack pointer and frame pointer registers. If ! 1257: this macro is not defined, it is up to the machine-dependent ! 1258: files to allocate such a register (if necessary). */ ! 1259: #define PIC_OFFSET_TABLE_REGNUM (GP_REG_FIRST + 28) ! 1260: ! 1261: #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25) ! 1262: ! 1263: ! 1264: /* Define the classes of registers for register constraints in the ! 1265: machine description. Also define ranges of constants. ! 1266: ! 1267: One of the classes must always be named ALL_REGS and include all hard regs. ! 1268: If there is more than one class, another class must be named NO_REGS ! 1269: and contain no registers. ! 1270: ! 1271: The name GENERAL_REGS must be the name of a class (or an alias for ! 1272: another name such as ALL_REGS). This is the class of registers ! 1273: that is allowed by "g" or "r" in a register constraint. ! 1274: Also, registers outside this class are allocated only when ! 1275: instructions express preferences for them. ! 1276: ! 1277: The classes must be numbered in nondecreasing order; that is, ! 1278: a larger-numbered class must never be contained completely ! 1279: in a smaller-numbered class. ! 1280: ! 1281: For any two classes, it is very desirable that there be another ! 1282: class that represents their union. */ ! 1283: ! 1284: enum reg_class ! 1285: { ! 1286: NO_REGS, /* no registers in set */ ! 1287: GR_REGS, /* integer registers */ ! 1288: FP_REGS, /* floating point registers */ ! 1289: HI_REG, /* hi register */ ! 1290: LO_REG, /* lo register */ ! 1291: MD_REGS, /* multiply/divide registers (hi/lo) */ ! 1292: ST_REGS, /* status registers (fp status) */ ! 1293: ALL_REGS, /* all registers */ ! 1294: LIM_REG_CLASSES /* max value + 1 */ ! 1295: }; ! 1296: ! 1297: #define N_REG_CLASSES (int) LIM_REG_CLASSES ! 1298: ! 1299: #define GENERAL_REGS GR_REGS ! 1300: ! 1301: /* An initializer containing the names of the register classes as C ! 1302: string constants. These names are used in writing some of the ! 1303: debugging dumps. */ ! 1304: ! 1305: #define REG_CLASS_NAMES \ ! 1306: { \ ! 1307: "NO_REGS", \ ! 1308: "GR_REGS", \ ! 1309: "FP_REGS", \ ! 1310: "HI_REG", \ ! 1311: "LO_REG", \ ! 1312: "MD_REGS", \ ! 1313: "ST_REGS", \ ! 1314: "ALL_REGS" \ ! 1315: } ! 1316: ! 1317: /* An initializer containing the contents of the register classes, ! 1318: as integers which are bit masks. The Nth integer specifies the ! 1319: contents of class N. The way the integer MASK is interpreted is ! 1320: that register R is in the class if `MASK & (1 << R)' is 1. ! 1321: ! 1322: When the machine has more than 32 registers, an integer does not ! 1323: suffice. Then the integers are replaced by sub-initializers, ! 1324: braced groupings containing several integers. Each ! 1325: sub-initializer must be suitable as an initializer for the type ! 1326: `HARD_REG_SET' which is defined in `hard-reg-set.h'. */ ! 1327: ! 1328: #define REG_CLASS_CONTENTS \ ! 1329: { \ ! 1330: { 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \ ! 1331: { 0xffffffff, 0x00000000, 0x00000000 }, /* integer registers */ \ ! 1332: { 0x00000000, 0xffffffff, 0x00000000 }, /* floating registers*/ \ ! 1333: { 0x00000000, 0x00000000, 0x00000001 }, /* hi register */ \ ! 1334: { 0x00000000, 0x00000000, 0x00000002 }, /* lo register */ \ ! 1335: { 0x00000000, 0x00000000, 0x00000003 }, /* mul/div registers */ \ ! 1336: { 0x00000000, 0x00000000, 0x00000004 }, /* status registers */ \ ! 1337: { 0xffffffff, 0xffffffff, 0x00000007 } /* all registers */ \ ! 1338: } ! 1339: ! 1340: ! 1341: /* A C expression whose value is a register class containing hard ! 1342: register REGNO. In general there is more that one such class; ! 1343: choose a class which is "minimal", meaning that no smaller class ! 1344: also contains the register. */ ! 1345: ! 1346: extern enum reg_class mips_regno_to_class[]; ! 1347: ! 1348: #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ] ! 1349: ! 1350: /* A macro whose definition is the name of the class to which a ! 1351: valid base register must belong. A base register is one used in ! 1352: an address which is the register value plus a displacement. */ ! 1353: ! 1354: #define BASE_REG_CLASS GR_REGS ! 1355: ! 1356: /* A macro whose definition is the name of the class to which a ! 1357: valid index register must belong. An index register is one used ! 1358: in an address where its value is either multiplied by a scale ! 1359: factor or added to another register (as well as added to a ! 1360: displacement). */ ! 1361: ! 1362: #define INDEX_REG_CLASS GR_REGS ! 1363: ! 1364: ! 1365: /* REGISTER AND CONSTANT CLASSES */ ! 1366: ! 1367: /* Get reg_class from a letter such as appears in the machine ! 1368: description. ! 1369: ! 1370: DEFINED REGISTER CLASSES: ! 1371: ! 1372: 'd' General (aka integer) registers ! 1373: 'f' Floating point registers ! 1374: 'h' Hi register ! 1375: 'l' Lo register ! 1376: 'x' Multiply/divide registers ! 1377: 'z' FP Status register */ ! 1378: ! 1379: extern enum reg_class mips_char_to_class[]; ! 1380: ! 1381: #define REG_CLASS_FROM_LETTER(C) mips_char_to_class[ (C) ] ! 1382: ! 1383: /* The letters I, J, K, L, M, N, O, and P in a register constraint ! 1384: string can be used to stand for particular ranges of immediate ! 1385: operands. This macro defines what the ranges are. C is the ! 1386: letter, and VALUE is a constant value. Return 1 if VALUE is ! 1387: in the range specified by C. */ ! 1388: ! 1389: /* For MIPS: ! 1390: ! 1391: `I' is used for the range of constants an arithmetic insn can ! 1392: actually contain (16 bits signed integers). ! 1393: ! 1394: `J' is used for the range which is just zero (ie, $r0). ! 1395: ! 1396: `K' is used for the range of constants a logical insn can actually ! 1397: contain (16 bit zero-extended integers). ! 1398: ! 1399: `L' is used for the range of constants that be loaded with lui ! 1400: (ie, the bottom 16 bits are zero). ! 1401: ! 1402: `M' is used for the range of constants that take two words to load ! 1403: (ie, not matched by `I', `K', and `L'). ! 1404: ! 1405: `N' is used for negative 16 bit constants. ! 1406: ! 1407: `O' is an exact power of 2 (not yet used in the md file). ! 1408: ! 1409: `P' is used for positive 16 bit constants. */ ! 1410: ! 1411: #define SMALL_INT(X) ((unsigned) (INTVAL (X) + 0x8000) < 0x10000) ! 1412: #define SMALL_INT_UNSIGNED(X) ((unsigned) (INTVAL (X)) < 0x10000) ! 1413: ! 1414: #define CONST_OK_FOR_LETTER_P(VALUE, C) \ ! 1415: ((C) == 'I' ? ((unsigned) ((VALUE) + 0x8000) < 0x10000) \ ! 1416: : (C) == 'J' ? ((VALUE) == 0) \ ! 1417: : (C) == 'K' ? ((unsigned) (VALUE) < 0x10000) \ ! 1418: : (C) == 'L' ? (((VALUE) & 0xffff0000) == (VALUE)) \ ! 1419: : (C) == 'M' ? ((((VALUE) & ~0x0000ffff) != 0) \ ! 1420: && (((VALUE) & ~0x0000ffff) != ~0x0000ffff) \ ! 1421: && ((VALUE) & 0x0000ffff) != 0) \ ! 1422: : (C) == 'N' ? (((VALUE) & ~0x0000ffff) == ~0x0000ffff) \ ! 1423: : (C) == 'O' ? (exact_log2 (VALUE) >= 0) \ ! 1424: : (C) == 'P' ? ((VALUE) != 0 && (((VALUE) & ~0x0000ffff) == 0)) \ ! 1425: : 0) ! 1426: ! 1427: /* Similar, but for floating constants, and defining letters G and H. ! 1428: Here VALUE is the CONST_DOUBLE rtx itself. */ ! 1429: ! 1430: /* For Mips ! 1431: ! 1432: 'G' : Floating point 0 */ ! 1433: ! 1434: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ ! 1435: ((C) == 'G' \ ! 1436: && CONST_DOUBLE_HIGH (VALUE) == 0 \ ! 1437: && CONST_DOUBLE_LOW (VALUE) == 0) ! 1438: ! 1439: /* Letters in the range `Q' through `U' may be defined in a ! 1440: machine-dependent fashion to stand for arbitrary operand types. ! 1441: The machine description macro `EXTRA_CONSTRAINT' is passed the ! 1442: operand as its first argument and the constraint letter as its ! 1443: second operand. ! 1444: ! 1445: `Q' is for memory references which take more than 1 instruction. ! 1446: `R' is for memory references which take 1 word for the instruction. ! 1447: `S' is for references to extern items which are PIC for OSF/rose. */ ! 1448: ! 1449: #define EXTRA_CONSTRAINT(OP,CODE) \ ! 1450: ((GET_CODE (OP) != MEM) ? FALSE \ ! 1451: : ((CODE) == 'Q') ? !simple_memory_operand (OP, GET_MODE (OP)) \ ! 1452: : ((CODE) == 'R') ? simple_memory_operand (OP, GET_MODE (OP)) \ ! 1453: : ((CODE) == 'S') ? (HALF_PIC_P () && CONSTANT_P (OP) \ ! 1454: && HALF_PIC_ADDRESS_P (OP)) \ ! 1455: : FALSE) ! 1456: ! 1457: /* Given an rtx X being reloaded into a reg required to be ! 1458: in class CLASS, return the class of reg to actually use. ! 1459: In general this is just CLASS; but on some machines ! 1460: in some cases it is preferable to use a more restrictive class. */ ! 1461: ! 1462: #define PREFERRED_RELOAD_CLASS(X,CLASS) \ ! 1463: ((GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ ! 1464: || GET_MODE_CLASS (GET_MODE (X)) == MODE_COMPLEX_FLOAT) \ ! 1465: ? (TARGET_SOFT_FLOAT ? GR_REGS : FP_REGS) \ ! 1466: : ((GET_MODE (X) == VOIDmode) \ ! 1467: ? GR_REGS \ ! 1468: : CLASS)) ! 1469: ! 1470: /* Certain machines have the property that some registers cannot be ! 1471: copied to some other registers without using memory. Define this ! 1472: macro on those machines to be a C expression that is non-zero if ! 1473: objects of mode MODE in registers of CLASS1 can only be copied to ! 1474: registers of class CLASS2 by storing a register of CLASS1 into ! 1475: memory and loading that memory location into a register of CLASS2. ! 1476: ! 1477: Do not define this macro if its value would always be zero. */ ! 1478: ! 1479: #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \ ! 1480: (!TARGET_DEBUG_H_MODE \ ! 1481: && GET_MODE_CLASS (MODE) == MODE_INT \ ! 1482: && ((CLASS1 == FP_REGS && CLASS2 == GR_REGS) \ ! 1483: || (CLASS1 == GR_REGS && CLASS2 == FP_REGS))) ! 1484: ! 1485: /* Return the maximum number of consecutive registers ! 1486: needed to represent mode MODE in a register of class CLASS. */ ! 1487: ! 1488: #define CLASS_UNITS(mode, size) \ ! 1489: ((GET_MODE_SIZE (mode) + (size) - 1) / (size)) ! 1490: ! 1491: #define CLASS_MAX_NREGS(CLASS, MODE) \ ! 1492: ((CLASS) == FP_REGS \ ! 1493: ? (TARGET_FLOAT64 \ ! 1494: ? CLASS_UNITS (MODE, 8) \ ! 1495: : 2 * CLASS_UNITS (MODE, 8)) \ ! 1496: : CLASS_UNITS (MODE, UNITS_PER_WORD)) ! 1497: ! 1498: /* If defined, this is a C expression whose value should be ! 1499: nonzero if the insn INSN has the effect of mysteriously ! 1500: clobbering the contents of hard register number REGNO. By ! 1501: "mysterious" we mean that the insn's RTL expression doesn't ! 1502: describe such an effect. ! 1503: ! 1504: If this macro is not defined, it means that no insn clobbers ! 1505: registers mysteriously. This is the usual situation; all else ! 1506: being equal, it is best for the RTL expression to show all the ! 1507: activity. */ ! 1508: ! 1509: /* #define INSN_CLOBBERS_REGNO_P(INSN, REGNO) */ ! 1510: ! 1511: ! 1512: /* Stack layout; function entry, exit and calling. */ ! 1513: ! 1514: /* Define this if pushing a word on the stack ! 1515: makes the stack pointer a smaller address. */ ! 1516: #define STACK_GROWS_DOWNWARD ! 1517: ! 1518: /* Define this if the nominal address of the stack frame ! 1519: is at the high-address end of the local variables; ! 1520: that is, each additional local variable allocated ! 1521: goes at a more negative offset in the frame. */ ! 1522: /* #define FRAME_GROWS_DOWNWARD */ ! 1523: ! 1524: /* Offset within stack frame to start allocating local variables at. ! 1525: If FRAME_GROWS_DOWNWARD, this is the offset to the END of the ! 1526: first local allocated. Otherwise, it is the offset to the BEGINNING ! 1527: of the first local allocated. */ ! 1528: #define STARTING_FRAME_OFFSET \ ! 1529: (current_function_outgoing_args_size \ ! 1530: + (TARGET_ABICALLS ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0)) ! 1531: ! 1532: /* Offset from the stack pointer register to an item dynamically ! 1533: allocated on the stack, e.g., by `alloca'. ! 1534: ! 1535: The default value for this macro is `STACK_POINTER_OFFSET' plus the ! 1536: length of the outgoing arguments. The default is correct for most ! 1537: machines. See `function.c' for details. ! 1538: ! 1539: The MIPS ABI states that functions which dynamically allocate the ! 1540: stack must not have 0 for STACK_DYNAMIC_OFFSET, since it looks like ! 1541: we are trying to create a second frame pointer to the function, so ! 1542: allocate some stack space to make it happy. ! 1543: ! 1544: However, the linker currently complains about linking any code that ! 1545: dynamically allocates stack space, and there seems to be a bug in ! 1546: STACK_DYNAMIC_OFFSET, so don't define this right now. */ ! 1547: ! 1548: #if 0 ! 1549: #define STACK_DYNAMIC_OFFSET(FUNDECL) \ ! 1550: ((current_function_outgoing_args_size == 0 && current_function_calls_alloca) \ ! 1551: ? 4*UNITS_PER_WORD \ ! 1552: : current_function_outgoing_args_size) ! 1553: #endif ! 1554: ! 1555: /* Structure to be filled in by compute_frame_size with register ! 1556: save masks, and offsets for the current function. */ ! 1557: ! 1558: struct mips_frame_info ! 1559: { ! 1560: long total_size; /* # bytes that the entire frame takes up */ ! 1561: long var_size; /* # bytes that variables take up */ ! 1562: long args_size; /* # bytes that outgoing arguments take up */ ! 1563: long extra_size; /* # bytes of extra gunk */ ! 1564: int gp_reg_size; /* # bytes needed to store gp regs */ ! 1565: int fp_reg_size; /* # bytes needed to store fp regs */ ! 1566: long mask; /* mask of saved gp registers */ ! 1567: long fmask; /* mask of saved fp registers */ ! 1568: long gp_save_offset; /* offset from vfp to store gp registers */ ! 1569: long fp_save_offset; /* offset from vfp to store fp registers */ ! 1570: long gp_sp_offset; /* offset from new sp to store gp registers */ ! 1571: long fp_sp_offset; /* offset from new sp to store fp registers */ ! 1572: int initialized; /* != 0 if frame size already calculated */ ! 1573: int num_gp; /* number of gp registers saved */ ! 1574: int num_fp; /* number of fp registers saved */ ! 1575: }; ! 1576: ! 1577: extern struct mips_frame_info current_frame_info; ! 1578: ! 1579: /* Store in the variable DEPTH the initial difference between the ! 1580: frame pointer reg contents and the stack pointer reg contents, ! 1581: as of the start of the function body. This depends on the layout ! 1582: of the fixed parts of the stack frame and on how registers are saved. */ ! 1583: ! 1584: /* #define INITIAL_FRAME_POINTER_OFFSET(VAR) \ ! 1585: ((VAR) = compute_frame_size (get_frame_size ())) */ ! 1586: ! 1587: /* If defined, this macro specifies a table of register pairs used to ! 1588: eliminate unneeded registers that point into the stack frame. If ! 1589: it is not defined, the only elimination attempted by the compiler ! 1590: is to replace references to the frame pointer with references to ! 1591: the stack pointer. ! 1592: ! 1593: The definition of this macro is a list of structure ! 1594: initializations, each of which specifies an original and ! 1595: replacement register. ! 1596: ! 1597: On some machines, the position of the argument pointer is not ! 1598: known until the compilation is completed. In such a case, a ! 1599: separate hard register must be used for the argument pointer. ! 1600: This register can be eliminated by replacing it with either the ! 1601: frame pointer or the argument pointer, depending on whether or not ! 1602: the frame pointer has been eliminated. ! 1603: ! 1604: In this case, you might specify: ! 1605: #define ELIMINABLE_REGS \ ! 1606: {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ ! 1607: {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ ! 1608: {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} ! 1609: ! 1610: Note that the elimination of the argument pointer with the stack ! 1611: pointer is specified first since that is the preferred elimination. */ ! 1612: ! 1613: #define ELIMINABLE_REGS \ ! 1614: {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ ! 1615: { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ ! 1616: { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} ! 1617: ! 1618: ! 1619: /* A C expression that returns non-zero if the compiler is allowed to ! 1620: try to replace register number FROM-REG with register number ! 1621: TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is ! 1622: defined, and will usually be the constant 1, since most of the ! 1623: cases preventing register elimination are things that the compiler ! 1624: already knows about. */ ! 1625: ! 1626: #define CAN_ELIMINATE(FROM, TO) \ ! 1627: (!frame_pointer_needed \ ! 1628: || ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM)) ! 1629: ! 1630: /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It ! 1631: specifies the initial difference between the specified pair of ! 1632: registers. This macro must be defined if `ELIMINABLE_REGS' is ! 1633: defined. */ ! 1634: ! 1635: #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ ! 1636: { compute_frame_size (get_frame_size ()); \ ! 1637: if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ ! 1638: (OFFSET) = 0; \ ! 1639: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \ ! 1640: (OFFSET) = current_frame_info.total_size; \ ! 1641: else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ ! 1642: (OFFSET) = current_frame_info.total_size; \ ! 1643: else \ ! 1644: abort (); \ ! 1645: } ! 1646: ! 1647: ! 1648: /* If we generate an insn to push BYTES bytes, ! 1649: this says how many the stack pointer really advances by. ! 1650: On the vax, sp@- in a byte insn really pushes a word. */ ! 1651: ! 1652: /* #define PUSH_ROUNDING(BYTES) 0 */ ! 1653: ! 1654: /* If defined, the maximum amount of space required for outgoing ! 1655: arguments will be computed and placed into the variable ! 1656: `current_function_outgoing_args_size'. No space will be pushed ! 1657: onto the stack for each call; instead, the function prologue ! 1658: should increase the stack frame size by this amount. ! 1659: ! 1660: It is not proper to define both `PUSH_ROUNDING' and ! 1661: `ACCUMULATE_OUTGOING_ARGS'. */ ! 1662: #define ACCUMULATE_OUTGOING_ARGS ! 1663: ! 1664: /* Offset from the argument pointer register to the first argument's ! 1665: address. On some machines it may depend on the data type of the ! 1666: function. ! 1667: ! 1668: If `ARGS_GROW_DOWNWARD', this is the offset to the location above ! 1669: the first argument's address. ! 1670: ! 1671: On the MIPS, we must skip the first argument position if we are ! 1672: returning a structure or a union, to account for it's address being ! 1673: passed in $4. However, at the current time, this produces a compiler ! 1674: that can't bootstrap, so comment it out for now. */ ! 1675: ! 1676: #if 0 ! 1677: #define FIRST_PARM_OFFSET(FNDECL) \ ! 1678: (FNDECL != 0 \ ! 1679: && TREE_TYPE (FNDECL) != 0 \ ! 1680: && TREE_TYPE (TREE_TYPE (FNDECL)) != 0 \ ! 1681: && (TREE_CODE (TREE_TYPE (TREE_TYPE (FNDECL))) == RECORD_TYPE \ ! 1682: || TREE_CODE (TREE_TYPE (TREE_TYPE (FNDECL))) == UNION_TYPE) \ ! 1683: ? UNITS_PER_WORD \ ! 1684: : 0) ! 1685: #else ! 1686: #define FIRST_PARM_OFFSET(FNDECL) 0 ! 1687: #endif ! 1688: ! 1689: /* When a parameter is passed in a register, stack space is still ! 1690: allocated for it. For the MIPS, stack space must be allocated, cf ! 1691: Asm Lang Prog Guide page 7-8. ! 1692: ! 1693: BEWARE that some space is also allocated for non existing arguments ! 1694: in register. In case an argument list is of form GF used registers ! 1695: are a0 (a2,a3), but we should push over a1... */ ! 1696: ! 1697: #define REG_PARM_STACK_SPACE(FNDECL) ((4*UNITS_PER_WORD) - FIRST_PARM_OFFSET (FNDECL)) ! 1698: ! 1699: /* Define this if it is the responsibility of the caller to ! 1700: allocate the area reserved for arguments passed in registers. ! 1701: If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect ! 1702: of this macro is to determine whether the space is included in ! 1703: `current_function_outgoing_args_size'. */ ! 1704: #define OUTGOING_REG_PARM_STACK_SPACE ! 1705: ! 1706: /* Align stack frames on 64 bits (Double Word ). */ ! 1707: #define STACK_BOUNDARY 64 ! 1708: ! 1709: /* Make sure 16 bytes are always allocated on the stack. */ ! 1710: ! 1711: #ifndef STACK_ARGS_ADJUST ! 1712: #define STACK_ARGS_ADJUST(SIZE) \ ! 1713: { \ ! 1714: if (SIZE.constant < 16) \ ! 1715: SIZE.constant = 16; \ ! 1716: } ! 1717: #endif ! 1718: ! 1719: ! 1720: /* A C expression that should indicate the number of bytes of its ! 1721: own arguments that a function function pops on returning, or 0 ! 1722: if the function pops no arguments and the caller must therefore ! 1723: pop them all after the function returns. ! 1724: ! 1725: FUNTYPE is a C variable whose value is a tree node that ! 1726: describes the function in question. Normally it is a node of ! 1727: type `FUNCTION_TYPE' that describes the data type of the function. ! 1728: From this it is possible to obtain the data types of the value ! 1729: and arguments (if known). ! 1730: ! 1731: When a call to a library function is being considered, FUNTYPE ! 1732: will contain an identifier node for the library function. Thus, ! 1733: if you need to distinguish among various library functions, you ! 1734: can do so by their names. Note that "library function" in this ! 1735: context means a function used to perform arithmetic, whose name ! 1736: is known specially in the compiler and was not mentioned in the ! 1737: C code being compiled. ! 1738: ! 1739: STACK-SIZE is the number of bytes of arguments passed on the ! 1740: stack. If a variable number of bytes is passed, it is zero, and ! 1741: argument popping will always be the responsibility of the ! 1742: calling function. */ ! 1743: ! 1744: #define RETURN_POPS_ARGS(FUNTYPE, SIZE) 0 ! 1745: ! 1746: ! 1747: /* Symbolic macros for the registers used to return integer and floating ! 1748: point values. */ ! 1749: ! 1750: #define GP_RETURN (GP_REG_FIRST + 2) ! 1751: #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0)) ! 1752: ! 1753: /* Symbolic macros for the first/last argument registers. */ ! 1754: ! 1755: #define GP_ARG_FIRST (GP_REG_FIRST + 4) ! 1756: #define GP_ARG_LAST (GP_REG_FIRST + 7) ! 1757: #define FP_ARG_FIRST (FP_REG_FIRST + 12) ! 1758: #define FP_ARG_LAST (FP_REG_FIRST + 15) ! 1759: ! 1760: #define MAX_ARGS_IN_REGISTERS 4 ! 1761: ! 1762: /* Define how to find the value returned by a library function ! 1763: assuming the value has mode MODE. */ ! 1764: ! 1765: #define LIBCALL_VALUE(MODE) \ ! 1766: gen_rtx (REG, MODE, \ ! 1767: (GET_MODE_CLASS (MODE) == MODE_FLOAT) \ ! 1768: ? FP_RETURN \ ! 1769: : GP_RETURN) ! 1770: ! 1771: /* Define how to find the value returned by a function. ! 1772: VALTYPE is the data type of the value (as a tree). ! 1773: If the precise function being called is known, FUNC is its FUNCTION_DECL; ! 1774: otherwise, FUNC is 0. */ ! 1775: ! 1776: #define FUNCTION_VALUE(VALTYPE, FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) ! 1777: ! 1778: ! 1779: /* 1 if N is a possible register number for a function value. ! 1780: On the MIPS, R2 R3 and F0 F2 are the only register thus used. ! 1781: Currently, R2 and F0 are only implemented here (C has no complex type) */ ! 1782: ! 1783: #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN) ! 1784: ! 1785: /* 1 if N is a possible register number for function argument passing. */ ! 1786: ! 1787: #define FUNCTION_ARG_REGNO_P(N) (((N) >= GP_ARG_FIRST && (N) <= GP_ARG_LAST) \ ! 1788: || ((N) >= FP_ARG_FIRST && (N) <= FP_ARG_LAST \ ! 1789: && (0 == (N) % 2))) ! 1790: ! 1791: /* A C expression which can inhibit the returning of certain function ! 1792: values in registers, based on the type of value. A nonzero value says ! 1793: to return the function value in memory, just as large structures are ! 1794: always returned. Here TYPE will be a C expression of type ! 1795: `tree', representing the data type of the value. ! 1796: ! 1797: Note that values of mode `BLKmode' must be explicitly ! 1798: handled by this macro. Also, the option `-fpcc-struct-return' ! 1799: takes effect regardless of this macro. On most systems, it is ! 1800: possible to leave the macro undefined; this causes a default ! 1801: definition to be used, whose value is the constant 1 for BLKmode ! 1802: values, and 0 otherwise. ! 1803: ! 1804: GCC normally converts 1 byte structures into chars, 2 byte ! 1805: structs into shorts, and 4 byte structs into ints, and returns ! 1806: them this way. Defining the following macro overrides this, ! 1807: to give us MIPS cc compatibility. */ ! 1808: ! 1809: #define RETURN_IN_MEMORY(TYPE) \ ! 1810: (TYPE_MODE (TYPE) == BLKmode) ! 1811: ! 1812: /* A code distinguishing the floating point format of the target ! 1813: machine. There are three defined values: IEEE_FLOAT_FORMAT, ! 1814: VAX_FLOAT_FORMAT, and UNKNOWN_FLOAT_FORMAT. */ ! 1815: ! 1816: #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT ! 1817: ! 1818: ! 1819: /* Define a data type for recording info about an argument list ! 1820: during the scan of that argument list. This data type should ! 1821: hold all necessary information about the function itself ! 1822: and about the args processed so far, enough to enable macros ! 1823: such as FUNCTION_ARG to determine where the next arg should go. ! 1824: */ ! 1825: ! 1826: typedef struct mips_args { ! 1827: int gp_reg_found; /* whether a gp register was found yet */ ! 1828: int arg_number; /* argument number */ ! 1829: int arg_words; /* # total words the arguments take */ ! 1830: int num_adjusts; /* number of adjustments made */ ! 1831: /* Adjustments made to args pass in regs. */ ! 1832: /* ??? The size is doubled to work around a ! 1833: bug in the code that sets the adjustments ! 1834: in function_arg. */ ! 1835: struct rtx_def *adjust[MAX_ARGS_IN_REGISTERS*2]; ! 1836: } CUMULATIVE_ARGS; ! 1837: ! 1838: /* Initialize a variable CUM of type CUMULATIVE_ARGS ! 1839: for a call to a function whose data type is FNTYPE. ! 1840: For a library call, FNTYPE is 0. ! 1841: ! 1842: */ ! 1843: ! 1844: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \ ! 1845: init_cumulative_args (&CUM, FNTYPE, LIBNAME) \ ! 1846: ! 1847: /* Update the data in CUM to advance over an argument ! 1848: of mode MODE and data type TYPE. ! 1849: (TYPE is null for libcalls where that information may not be available.) */ ! 1850: ! 1851: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ ! 1852: function_arg_advance (&CUM, MODE, TYPE, NAMED) ! 1853: ! 1854: /* Determine where to put an argument to a function. ! 1855: Value is zero to push the argument on the stack, ! 1856: or a hard register in which to store the argument. ! 1857: ! 1858: MODE is the argument's machine mode. ! 1859: TYPE is the data type of the argument (as a tree). ! 1860: This is null for libcalls where that information may ! 1861: not be available. ! 1862: CUM is a variable of type CUMULATIVE_ARGS which gives info about ! 1863: the preceding args and about the function being called. ! 1864: NAMED is nonzero if this argument is a named parameter ! 1865: (otherwise it is an extra parameter matching an ellipsis). */ ! 1866: ! 1867: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ ! 1868: function_arg( &CUM, MODE, TYPE, NAMED) ! 1869: ! 1870: /* For an arg passed partly in registers and partly in memory, ! 1871: this is the number of registers used. ! 1872: For args passed entirely in registers or entirely in memory, zero. */ ! 1873: ! 1874: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ ! 1875: function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED) ! 1876: ! 1877: /* If defined, a C expression that gives the alignment boundary, in ! 1878: bits, of an argument with the specified mode and type. If it is ! 1879: not defined, `PARM_BOUNDARY' is used for all arguments. */ ! 1880: ! 1881: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ ! 1882: (((TYPE) != 0) \ ! 1883: ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY) \ ! 1884: ? PARM_BOUNDARY \ ! 1885: : TYPE_ALIGN(TYPE)) \ ! 1886: : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY) \ ! 1887: ? PARM_BOUNDARY \ ! 1888: : GET_MODE_ALIGNMENT(MODE))) ! 1889: ! 1890: ! 1891: /* This macro generates the assembly code for function entry. ! 1892: FILE is a stdio stream to output the code to. ! 1893: SIZE is an int: how many units of temporary storage to allocate. ! 1894: Refer to the array `regs_ever_live' to determine which registers ! 1895: to save; `regs_ever_live[I]' is nonzero if register number I ! 1896: is ever used in the function. This macro is responsible for ! 1897: knowing which registers should not be saved even if used. */ ! 1898: ! 1899: #define FUNCTION_PROLOGUE(FILE, SIZE) function_prologue(FILE, SIZE) ! 1900: ! 1901: /* This macro generates the assembly code for function exit, ! 1902: on machines that need it. If FUNCTION_EPILOGUE is not defined ! 1903: then individual return instructions are generated for each ! 1904: return statement. Args are same as for FUNCTION_PROLOGUE. */ ! 1905: ! 1906: #define FUNCTION_EPILOGUE(FILE, SIZE) function_epilogue(FILE, SIZE) ! 1907: ! 1908: /* Define the number of delay slots needed for the function epilogue. ! 1909: ! 1910: On the mips, we need a slot if either no stack has been allocated, ! 1911: or the only register saved is the return register. */ ! 1912: ! 1913: #define DELAY_SLOTS_FOR_EPILOGUE mips_epilogue_delay_slots () ! 1914: ! 1915: /* Define whether INSN can be placed in delay slot N for the epilogue. ! 1916: No references to the stack must be made, since on the MIPS, the ! 1917: delay slot is done after the stack has been cleaned up. */ ! 1918: ! 1919: #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN,N) \ ! 1920: (get_attr_dslot (INSN) == DSLOT_NO \ ! 1921: && get_attr_length (INSN) == 1 \ ! 1922: && ! epilogue_reg_mentioned_p (PATTERN (INSN))) ! 1923: ! 1924: /* Tell prologue and epilogue if register REGNO should be saved / restored. */ ! 1925: ! 1926: #define MUST_SAVE_REGISTER(regno) \ ! 1927: ((regs_ever_live[regno] && !call_used_regs[regno]) \ ! 1928: || (regno == FRAME_POINTER_REGNUM && frame_pointer_needed) \ ! 1929: || (regno == (GP_REG_FIRST + 31) && regs_ever_live[GP_REG_FIRST + 31])) ! 1930: ! 1931: /* ALIGN FRAMES on double word boundaries */ ! 1932: ! 1933: #define MIPS_STACK_ALIGN(LOC) (((LOC)+7) & ~7) ! 1934: ! 1935: ! 1936: /* Output assembler code to FILE to increment profiler label # LABELNO ! 1937: for profiling a function entry. */ ! 1938: ! 1939: #define FUNCTION_PROFILER(FILE, LABELNO) \ ! 1940: { \ ! 1941: fprintf (FILE, "\t.set\tnoreorder\n"); \ ! 1942: fprintf (FILE, "\t.set\tnoat\n"); \ ! 1943: fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \ ! 1944: reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \ ! 1945: fprintf (FILE, "\tjal\t_mcount\n"); \ ! 1946: fprintf (FILE, "\tsubu\t%s,%s,8\t\t# _mcount pops 2 words from stack\n", \ ! 1947: reg_names[STACK_POINTER_REGNUM], \ ! 1948: reg_names[STACK_POINTER_REGNUM]); \ ! 1949: fprintf (FILE, "\t.set\treorder\n"); \ ! 1950: fprintf (FILE, "\t.set\tat\n"); \ ! 1951: } ! 1952: ! 1953: /* Define this macro if the code for function profiling should come ! 1954: before the function prologue. Normally, the profiling code comes ! 1955: after. */ ! 1956: ! 1957: /* #define PROFILE_BEFORE_PROLOGUE */ ! 1958: ! 1959: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, ! 1960: the stack pointer does not matter. The value is tested only in ! 1961: functions that have frame pointers. ! 1962: No definition is equivalent to always zero. */ ! 1963: ! 1964: #define EXIT_IGNORE_STACK 1 ! 1965: ! 1966: ! 1967: /* A C statement to output, on the stream FILE, assembler code for a ! 1968: block of data that contains the constant parts of a trampoline. ! 1969: This code should not include a label--the label is taken care of ! 1970: automatically. */ ! 1971: ! 1972: #define TRAMPOLINE_TEMPLATE(STREAM) \ ! 1973: { \ ! 1974: fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \ ! 1975: fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \ ! 1976: fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \ ! 1977: fprintf (STREAM, "\t.word\t0x8fe30010\t\t# lw $3,16($31)\n"); \ ! 1978: fprintf (STREAM, "\t.word\t0x8fe20014\t\t# lw $2,20($31)\n"); \ ! 1979: fprintf (STREAM, "\t.word\t0x00600008\t\t# jr $3\n"); \ ! 1980: fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \ ! 1981: fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \ ! 1982: fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \ ! 1983: } ! 1984: ! 1985: /* A C expression for the size in bytes of the trampoline, as an ! 1986: integer. */ ! 1987: ! 1988: #define TRAMPOLINE_SIZE (9*4) ! 1989: ! 1990: /* Alignment required for trampolines, in bits. ! 1991: ! 1992: If you don't define this macro, the value of `BIGGEST_ALIGNMENT' ! 1993: is used for aligning trampolines. */ ! 1994: ! 1995: /* #define TRAMPOLINE_ALIGNMENT 32 */ ! 1996: ! 1997: /* A C statement to initialize the variable parts of a trampoline. ! 1998: ADDR is an RTX for the address of the trampoline; FNADDR is an ! 1999: RTX for the address of the nested function; STATIC_CHAIN is an ! 2000: RTX for the static chain value that should be passed to the ! 2001: function when it is called. */ ! 2002: ! 2003: #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \ ! 2004: { \ ! 2005: rtx addr = ADDR; \ ! 2006: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 28)), FUNC); \ ! 2007: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 32)), CHAIN); \ ! 2008: \ ! 2009: /* Flush the instruction cache. */ \ ! 2010: emit_library_call (gen_rtx (SYMBOL_REF, Pmode, "__gcc_flush_cache"), \ ! 2011: 0, VOIDmode, 1, addr, Pmode); \ ! 2012: } ! 2013: ! 2014: /* Flush the instruction cache. */ ! 2015: ! 2016: #define TRANSFER_FROM_TRAMPOLINE \ ! 2017: \ ! 2018: void \ ! 2019: __gcc_flush_cache (addr) \ ! 2020: char *addr; \ ! 2021: { \ ! 2022: if (cacheflush (addr, TRAMPOLINE_SIZE, 1) < 0) \ ! 2023: perror ("cacheflush of trampoline code"); \ ! 2024: } ! 2025: ! 2026: /* Addressing modes, and classification of registers for them. */ ! 2027: ! 2028: /* #define HAVE_POST_INCREMENT */ ! 2029: /* #define HAVE_POST_DECREMENT */ ! 2030: ! 2031: /* #define HAVE_PRE_DECREMENT */ ! 2032: /* #define HAVE_PRE_INCREMENT */ ! 2033: ! 2034: /* These assume that REGNO is a hard or pseudo reg number. ! 2035: They give nonzero only if REGNO is a hard reg of the suitable class ! 2036: or a pseudo reg currently allocated to a suitable hard reg. ! 2037: These definitions are NOT overridden anywhere. */ ! 2038: ! 2039: #define GP_REG_OR_PSEUDO_STRICT_P(regno) \ ! 2040: GP_REG_P((regno < FIRST_PSEUDO_REGISTER) ? regno : reg_renumber[regno]) ! 2041: ! 2042: #define GP_REG_OR_PSEUDO_NONSTRICT_P(regno) \ ! 2043: (((regno) >= FIRST_PSEUDO_REGISTER) || (GP_REG_P (regno))) ! 2044: ! 2045: #define REGNO_OK_FOR_INDEX_P(regno) GP_REG_OR_PSEUDO_STRICT_P (regno) ! 2046: #define REGNO_OK_FOR_BASE_P(regno) GP_REG_OR_PSEUDO_STRICT_P (regno) ! 2047: ! 2048: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx ! 2049: and check its validity for a certain class. ! 2050: We have two alternate definitions for each of them. ! 2051: The usual definition accepts all pseudo regs; the other rejects them all. ! 2052: The symbol REG_OK_STRICT causes the latter definition to be used. ! 2053: ! 2054: Most source files want to accept pseudo regs in the hope that ! 2055: they will get allocated to the class that the insn wants them to be in. ! 2056: Some source files that are used after register allocation ! 2057: need to be strict. */ ! 2058: ! 2059: #ifndef REG_OK_STRICT ! 2060: ! 2061: #define REG_OK_STRICT_P 0 ! 2062: #define REG_OK_FOR_INDEX_P(X) GP_REG_OR_PSEUDO_NONSTRICT_P (REGNO (X)) ! 2063: #define REG_OK_FOR_BASE_P(X) GP_REG_OR_PSEUDO_NONSTRICT_P (REGNO (X)) ! 2064: ! 2065: #else ! 2066: ! 2067: #define REG_OK_STRICT_P 1 ! 2068: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) ! 2069: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) ! 2070: ! 2071: #endif ! 2072: ! 2073: ! 2074: /* Maximum number of registers that can appear in a valid memory address. */ ! 2075: ! 2076: #define MAX_REGS_PER_ADDRESS 1 ! 2077: ! 2078: /* A C compound statement with a conditional `goto LABEL;' executed ! 2079: if X (an RTX) is a legitimate memory address on the target ! 2080: machine for a memory operand of mode MODE. ! 2081: ! 2082: It usually pays to define several simpler macros to serve as ! 2083: subroutines for this one. Otherwise it may be too complicated ! 2084: to understand. ! 2085: ! 2086: This macro must exist in two variants: a strict variant and a ! 2087: non-strict one. The strict variant is used in the reload pass. ! 2088: It must be defined so that any pseudo-register that has not been ! 2089: allocated a hard register is considered a memory reference. In ! 2090: contexts where some kind of register is required, a ! 2091: pseudo-register with no hard register must be rejected. ! 2092: ! 2093: The non-strict variant is used in other passes. It must be ! 2094: defined to accept all pseudo-registers in every context where ! 2095: some kind of register is required. ! 2096: ! 2097: Compiler source files that want to use the strict variant of ! 2098: this macro define the macro `REG_OK_STRICT'. You should use an ! 2099: `#ifdef REG_OK_STRICT' conditional to define the strict variant ! 2100: in that case and the non-strict variant otherwise. ! 2101: ! 2102: Typically among the subroutines used to define ! 2103: `GO_IF_LEGITIMATE_ADDRESS' are subroutines to check for ! 2104: acceptable registers for various purposes (one for base ! 2105: registers, one for index registers, and so on). Then only these ! 2106: subroutine macros need have two variants; the higher levels of ! 2107: macros may be the same whether strict or not. ! 2108: ! 2109: Normally, constant addresses which are the sum of a `symbol_ref' ! 2110: and an integer are stored inside a `const' RTX to mark them as ! 2111: constant. Therefore, there is no need to recognize such sums ! 2112: specifically as legitimate addresses. Normally you would simply ! 2113: recognize any `const' as legitimate. ! 2114: ! 2115: Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle ! 2116: constant sums that are not marked with `const'. It assumes ! 2117: that a naked `plus' indicates indexing. If so, then you *must* ! 2118: reject such naked constant sums as illegitimate addresses, so ! 2119: that none of them will be given to `PRINT_OPERAND_ADDRESS'. ! 2120: ! 2121: On some machines, whether a symbolic address is legitimate ! 2122: depends on the section that the address refers to. On these ! 2123: machines, define the macro `ENCODE_SECTION_INFO' to store the ! 2124: information into the `symbol_ref', and then check for it here. ! 2125: When you see a `const', you will have to look inside it to find ! 2126: the `symbol_ref' in order to determine the section. */ ! 2127: ! 2128: #if 1 ! 2129: #define GO_PRINTF(x) trace(x) ! 2130: #define GO_PRINTF2(x,y) trace(x,y) ! 2131: #define GO_DEBUG_RTX(x) debug_rtx(x) ! 2132: ! 2133: #else ! 2134: #define GO_PRINTF(x) ! 2135: #define GO_PRINTF2(x,y) ! 2136: #define GO_DEBUG_RTX(x) ! 2137: #endif ! 2138: ! 2139: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ ! 2140: { \ ! 2141: register rtx xinsn = (X); \ ! 2142: \ ! 2143: if (TARGET_DEBUG_B_MODE) \ ! 2144: { \ ! 2145: GO_PRINTF2 ("\n========== GO_IF_LEGITIMATE_ADDRESS, %sstrict\n", \ ! 2146: (REG_OK_STRICT_P) ? "" : "not "); \ ! 2147: GO_DEBUG_RTX (xinsn); \ ! 2148: } \ ! 2149: \ ! 2150: if (GET_CODE (xinsn) == REG && REG_OK_FOR_BASE_P (xinsn)) \ ! 2151: goto ADDR; \ ! 2152: \ ! 2153: if (CONSTANT_ADDRESS_P (xinsn)) \ ! 2154: goto ADDR; \ ! 2155: \ ! 2156: if (GET_CODE (xinsn) == PLUS) \ ! 2157: { \ ! 2158: register rtx xplus0 = XEXP (xinsn, 0); \ ! 2159: register rtx xplus1 = XEXP (xinsn, 1); \ ! 2160: register enum rtx_code code0 = GET_CODE (xplus0); \ ! 2161: register enum rtx_code code1 = GET_CODE (xplus1); \ ! 2162: \ ! 2163: if (code0 != REG && code1 == REG) \ ! 2164: { \ ! 2165: xplus0 = XEXP (xinsn, 1); \ ! 2166: xplus1 = XEXP (xinsn, 0); \ ! 2167: code0 = GET_CODE (xplus0); \ ! 2168: code1 = GET_CODE (xplus1); \ ! 2169: } \ ! 2170: \ ! 2171: if (code0 == REG && REG_OK_FOR_BASE_P (xplus0)) \ ! 2172: { \ ! 2173: if (code1 == CONST_INT) \ ! 2174: { \ ! 2175: register unsigned adj_offset = INTVAL (xplus1) + 0x8000; \ ! 2176: \ ! 2177: if ((adj_offset <= 0xffff) \ ! 2178: && (adj_offset + GET_MODE_SIZE (MODE) - 1 <= 0xffff)) \ ! 2179: goto ADDR; \ ! 2180: } \ ! 2181: \ ! 2182: /* For some code sequences, you actually get better code by \ ! 2183: pretending that the MIPS supports an address mode of a \ ! 2184: constant address + a register, even though the real \ ! 2185: machine doesn't support it. This is because the \ ! 2186: assembler can use $r1 to load just the high 16 bits, add \ ! 2187: in the register, and fold the low 16 bits into the memory \ ! 2188: reference, whereas the compiler generates a 4 instruction \ ! 2189: sequence. On the other hand, CSE is not as effective. \ ! 2190: It would be a win to generate the lui directly, but the \ ! 2191: MIPS assembler does not have syntax to generate the \ ! 2192: appropriate relocation. */ \ ! 2193: \ ! 2194: else if (!TARGET_DEBUG_A_MODE \ ! 2195: && code0 == REG \ ! 2196: && CONSTANT_ADDRESS_P (xplus1)) \ ! 2197: goto ADDR; \ ! 2198: } \ ! 2199: } \ ! 2200: \ ! 2201: if (TARGET_DEBUG_B_MODE) \ ! 2202: GO_PRINTF ("Not a legitimate address\n"); \ ! 2203: } ! 2204: ! 2205: ! 2206: /* A C expression that is 1 if the RTX X is a constant which is a ! 2207: valid address. This is defined to be the same as `CONSTANT_P (X)', ! 2208: but rejecting CONST_DOUBLE. */ ! 2209: #define CONSTANT_ADDRESS_P(X) \ ! 2210: ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ ! 2211: || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \ ! 2212: || GET_CODE (X) == HIGH) && (!HALF_PIC_P () || !HALF_PIC_ADDRESS_P (X))) ! 2213: ! 2214: ! 2215: /* Nonzero if the constant value X is a legitimate general operand. ! 2216: It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. ! 2217: ! 2218: At present, GAS doesn't understand li.[sd], so don't allow it ! 2219: to be generated at present. Also, the MIPS assembler does not ! 2220: grok li.d Infinity. */ ! 2221: ! 2222: #define LEGITIMATE_CONSTANT_P(X) \ ! 2223: (GET_CODE (X) != CONST_DOUBLE || mips_const_double_ok (X, GET_MODE (X))) ! 2224: ! 2225: ! 2226: /* A C compound statement that attempts to replace X with a valid ! 2227: memory address for an operand of mode MODE. WIN will be a C ! 2228: statement label elsewhere in the code; the macro definition may ! 2229: use ! 2230: ! 2231: GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); ! 2232: ! 2233: to avoid further processing if the address has become legitimate. ! 2234: ! 2235: X will always be the result of a call to `break_out_memory_refs', ! 2236: and OLDX will be the operand that was given to that function to ! 2237: produce X. ! 2238: ! 2239: The code generated by this macro should not alter the ! 2240: substructure of X. If it transforms X into a more legitimate ! 2241: form, it should assign X (which will always be a C variable) a ! 2242: new value. ! 2243: ! 2244: It is not necessary for this macro to come up with a legitimate ! 2245: address. The compiler has standard ways of doing so in all ! 2246: cases. In fact, it is safe for this macro to do nothing. But ! 2247: often a machine-dependent strategy can generate better code. ! 2248: ! 2249: For the MIPS, transform: ! 2250: ! 2251: memory(X + <large int>) ! 2252: ! 2253: into: ! 2254: ! 2255: Y = <large int> & ~0x7fff; ! 2256: Z = X + Y ! 2257: memory (Z + (<large int> & 0x7fff)); ! 2258: ! 2259: This is for CSE to find several similar references, and only use one Z. */ ! 2260: ! 2261: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \ ! 2262: { \ ! 2263: register rtx xinsn = (X); \ ! 2264: \ ! 2265: if (TARGET_DEBUG_B_MODE) \ ! 2266: { \ ! 2267: GO_PRINTF ("\n========== LEGITIMIZE_ADDRESS\n"); \ ! 2268: GO_DEBUG_RTX (xinsn); \ ! 2269: } \ ! 2270: \ ! 2271: if (GET_CODE (xinsn) == PLUS) \ ! 2272: { \ ! 2273: register rtx xplus0 = XEXP (xinsn, 0); \ ! 2274: register rtx xplus1 = XEXP (xinsn, 1); \ ! 2275: register enum rtx_code code0 = GET_CODE (xplus0); \ ! 2276: register enum rtx_code code1 = GET_CODE (xplus1); \ ! 2277: \ ! 2278: if (code0 != REG && code1 == REG) \ ! 2279: { \ ! 2280: xplus0 = XEXP (xinsn, 1); \ ! 2281: xplus1 = XEXP (xinsn, 0); \ ! 2282: code0 = GET_CODE (xplus0); \ ! 2283: code1 = GET_CODE (xplus1); \ ! 2284: } \ ! 2285: \ ! 2286: if (code0 == REG && REG_OK_FOR_BASE_P (xplus0) \ ! 2287: && code1 == CONST_INT && !SMALL_INT (xplus1)) \ ! 2288: { \ ! 2289: rtx int_reg = gen_reg_rtx (Pmode); \ ! 2290: rtx ptr_reg = gen_reg_rtx (Pmode); \ ! 2291: \ ! 2292: emit_move_insn (int_reg, \ ! 2293: GEN_INT (INTVAL (xplus1) & ~ 0x7fff)); \ ! 2294: \ ! 2295: emit_insn (gen_rtx (SET, VOIDmode, \ ! 2296: ptr_reg, \ ! 2297: gen_rtx (PLUS, Pmode, xplus0, int_reg))); \ ! 2298: \ ! 2299: X = gen_rtx (PLUS, Pmode, ptr_reg, \ ! 2300: GEN_INT (INTVAL (xplus1) & 0x7fff)); \ ! 2301: goto WIN; \ ! 2302: } \ ! 2303: } \ ! 2304: \ ! 2305: if (TARGET_DEBUG_B_MODE) \ ! 2306: GO_PRINTF ("LEGITIMIZE_ADDRESS could not fix.\n"); \ ! 2307: } ! 2308: ! 2309: ! 2310: /* A C statement or compound statement with a conditional `goto ! 2311: LABEL;' executed if memory address X (an RTX) can have different ! 2312: meanings depending on the machine mode of the memory reference it ! 2313: is used for. ! 2314: ! 2315: Autoincrement and autodecrement addresses typically have ! 2316: mode-dependent effects because the amount of the increment or ! 2317: decrement is the size of the operand being addressed. Some ! 2318: machines have other mode-dependent addresses. Many RISC machines ! 2319: have no mode-dependent addresses. ! 2320: ! 2321: You may assume that ADDR is a valid address for the machine. */ ! 2322: ! 2323: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {} ! 2324: ! 2325: ! 2326: /* Define this macro if references to a symbol must be treated ! 2327: differently depending on something about the variable or ! 2328: function named by the symbol (such as what section it is in). ! 2329: ! 2330: The macro definition, if any, is executed immediately after the ! 2331: rtl for DECL has been created and stored in `DECL_RTL (DECL)'. ! 2332: The value of the rtl will be a `mem' whose address is a ! 2333: `symbol_ref'. ! 2334: ! 2335: The usual thing for this macro to do is to a flag in the ! 2336: `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified ! 2337: name string in the `symbol_ref' (if one bit is not enough ! 2338: information). ! 2339: ! 2340: The best way to modify the name string is by adding text to the ! 2341: beginning, with suitable punctuation to prevent any ambiguity. ! 2342: Allocate the new name in `saveable_obstack'. You will have to ! 2343: modify `ASM_OUTPUT_LABELREF' to remove and decode the added text ! 2344: and output the name accordingly. ! 2345: ! 2346: You can also check the information stored in the `symbol_ref' in ! 2347: the definition of `GO_IF_LEGITIMATE_ADDRESS' or ! 2348: `PRINT_OPERAND_ADDRESS'. */ ! 2349: ! 2350: #define ENCODE_SECTION_INFO(DECL) \ ! 2351: do \ ! 2352: { \ ! 2353: if (optimize && mips_section_threshold > 0 && TARGET_GP_OPT \ ! 2354: && TREE_CODE (DECL) == VAR_DECL) \ ! 2355: { \ ! 2356: int size = int_size_in_bytes (TREE_TYPE (DECL)); \ ! 2357: \ ! 2358: if (size > 0 && size <= mips_section_threshold) \ ! 2359: SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1; \ ! 2360: } \ ! 2361: \ ! 2362: else if (HALF_PIC_P ()) \ ! 2363: HALF_PIC_ENCODE (DECL); \ ! 2364: } \ ! 2365: while (0) ! 2366: ! 2367: ! 2368: /* Specify the machine mode that this machine uses ! 2369: for the index in the tablejump instruction. */ ! 2370: #define CASE_VECTOR_MODE SImode ! 2371: ! 2372: /* Define this if the tablejump instruction expects the table ! 2373: to contain offsets from the address of the table. ! 2374: Do not define this if the table should contain absolute addresses. */ ! 2375: /* #define CASE_VECTOR_PC_RELATIVE */ ! 2376: ! 2377: /* Specify the tree operation to be used to convert reals to integers. */ ! 2378: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR ! 2379: ! 2380: /* This is the kind of divide that is easiest to do in the general case. */ ! 2381: #define EASY_DIV_EXPR TRUNC_DIV_EXPR ! 2382: ! 2383: /* Define this as 1 if `char' should by default be signed; else as 0. */ ! 2384: #ifndef DEFAULT_SIGNED_CHAR ! 2385: #define DEFAULT_SIGNED_CHAR 1 ! 2386: #endif ! 2387: ! 2388: /* Max number of bytes we can move from memory to memory ! 2389: in one reasonably fast instruction. */ ! 2390: #define MOVE_MAX 4 ! 2391: ! 2392: /* Define this macro as a C expression which is nonzero if ! 2393: accessing less than a word of memory (i.e. a `char' or a ! 2394: `short') is no faster than accessing a word of memory, i.e., if ! 2395: such access require more than one instruction or if there is no ! 2396: difference in cost between byte and (aligned) word loads. ! 2397: ! 2398: On RISC machines, it tends to generate better code to define ! 2399: this as 1, since it avoids making a QI or HI mode register. */ ! 2400: #define SLOW_BYTE_ACCESS 1 ! 2401: ! 2402: /* We assume that the store-condition-codes instructions store 0 for false ! 2403: and some other value for true. This is the value stored for true. */ ! 2404: ! 2405: #define STORE_FLAG_VALUE 1 ! 2406: ! 2407: /* Define this if zero-extension is slow (more than one real instruction). */ ! 2408: #define SLOW_ZERO_EXTEND ! 2409: ! 2410: /* Define this to be nonzero if shift instructions ignore all but the low-order ! 2411: few bits. */ ! 2412: #define SHIFT_COUNT_TRUNCATED 1 ! 2413: ! 2414: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits ! 2415: is done just by pretending it is already truncated. */ ! 2416: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 ! 2417: ! 2418: /* Define this macro to control use of the character `$' in ! 2419: identifier names. The value should be 0, 1, or 2. 0 means `$' ! 2420: is not allowed by default; 1 means it is allowed by default if ! 2421: `-traditional' is used; 2 means it is allowed by default provided ! 2422: `-ansi' is not used. 1 is the default; there is no need to ! 2423: define this macro in that case. */ ! 2424: ! 2425: #ifndef DOLLARS_IN_IDENTIFIERS ! 2426: #define DOLLARS_IN_IDENTIFIERS 1 ! 2427: #endif ! 2428: ! 2429: /* Specify the machine mode that pointers have. ! 2430: After generation of rtl, the compiler makes no further distinction ! 2431: between pointers and any other objects of this machine mode. */ ! 2432: #define Pmode SImode ! 2433: ! 2434: /* A function address in a call instruction ! 2435: is a word address (for indexing purposes) ! 2436: so give the MEM rtx a words's mode. */ ! 2437: ! 2438: #define FUNCTION_MODE SImode ! 2439: ! 2440: /* Define TARGET_MEM_FUNCTIONS if we want to use calls to memcpy and ! 2441: memset, instead of the BSD functions bcopy and bzero. */ ! 2442: ! 2443: #if defined(MIPS_SYSV) || defined(OSF_OS) ! 2444: #define TARGET_MEM_FUNCTIONS ! 2445: #endif ! 2446: ! 2447: ! 2448: /* A part of a C `switch' statement that describes the relative ! 2449: costs of constant RTL expressions. It must contain `case' ! 2450: labels for expression codes `const_int', `const', `symbol_ref', ! 2451: `label_ref' and `const_double'. Each case must ultimately reach ! 2452: a `return' statement to return the relative cost of the use of ! 2453: that kind of constant value in an expression. The cost may ! 2454: depend on the precise value of the constant, which is available ! 2455: for examination in X. ! 2456: ! 2457: CODE is the expression code--redundant, since it can be obtained ! 2458: with `GET_CODE (X)'. */ ! 2459: ! 2460: #define CONST_COSTS(X,CODE,OUTER_CODE) \ ! 2461: case CONST_INT: \ ! 2462: /* Always return 0, since we don't have different sized \ ! 2463: instructions, hence different costs according to Richard \ ! 2464: Kenner */ \ ! 2465: return COSTS_N_INSNS (0); \ ! 2466: \ ! 2467: case LABEL_REF: \ ! 2468: return COSTS_N_INSNS (2); \ ! 2469: \ ! 2470: case CONST: \ ! 2471: { \ ! 2472: rtx offset = const0_rtx; \ ! 2473: rtx symref = eliminate_constant_term (X, &offset); \ ! 2474: \ ! 2475: if (GET_CODE (symref) == LABEL_REF) \ ! 2476: return COSTS_N_INSNS (2); \ ! 2477: \ ! 2478: if (GET_CODE (symref) != SYMBOL_REF) \ ! 2479: return COSTS_N_INSNS (4); \ ! 2480: \ ! 2481: /* let's be paranoid.... */ \ ! 2482: if (INTVAL (offset) < -32768 || INTVAL (offset) > 32767) \ ! 2483: return COSTS_N_INSNS (2); \ ! 2484: \ ! 2485: return COSTS_N_INSNS (SYMBOL_REF_FLAG (symref) ? 1 : 2); \ ! 2486: } \ ! 2487: \ ! 2488: case SYMBOL_REF: \ ! 2489: return COSTS_N_INSNS (SYMBOL_REF_FLAG (X) ? 1 : 2); \ ! 2490: \ ! 2491: case CONST_DOUBLE: \ ! 2492: return COSTS_N_INSNS ((CONST_DOUBLE_HIGH (X) == 0 \ ! 2493: && CONST_DOUBLE_LOW (X)) ? 2 : 4); ! 2494: ! 2495: ! 2496: /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. ! 2497: This can be used, for example, to indicate how costly a multiply ! 2498: instruction is. In writing this macro, you can use the construct ! 2499: `COSTS_N_INSNS (N)' to specify a cost equal to N fast instructions. ! 2500: ! 2501: This macro is optional; do not define it if the default cost ! 2502: assumptions are adequate for the target machine. ! 2503: ! 2504: If -mdebugd is used, change the multiply cost to 2, so multiply by ! 2505: a constant isn't converted to a series of shifts. This helps ! 2506: strength reduction, and also makes it easier to identify what the ! 2507: compiler is doing. */ ! 2508: ! 2509: #define RTX_COSTS(X,CODE,OUTER_CODE) \ ! 2510: case MEM: \ ! 2511: { \ ! 2512: int num_words = (GET_MODE_SIZE (GET_MODE (X)) > UNITS_PER_WORD) ? 2 : 1; \ ! 2513: if (simple_memory_operand (X, GET_MODE (X))) \ ! 2514: return COSTS_N_INSNS (num_words); \ ! 2515: \ ! 2516: return COSTS_N_INSNS (2*num_words); \ ! 2517: } \ ! 2518: \ ! 2519: case FFS: \ ! 2520: return COSTS_N_INSNS (6); \ ! 2521: \ ! 2522: case NOT: \ ! 2523: return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 2 : 1); \ ! 2524: \ ! 2525: case AND: \ ! 2526: case IOR: \ ! 2527: case XOR: \ ! 2528: if (GET_MODE (X) == DImode) \ ! 2529: return COSTS_N_INSNS (2); \ ! 2530: \ ! 2531: if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ ! 2532: { \ ! 2533: rtx number = XEXP (X, 1); \ ! 2534: if (SMALL_INT_UNSIGNED (number)) \ ! 2535: return COSTS_N_INSNS (1); \ ! 2536: \ ! 2537: else if (SMALL_INT (number)) \ ! 2538: return COSTS_N_INSNS (2); \ ! 2539: \ ! 2540: return COSTS_N_INSNS (3); \ ! 2541: } \ ! 2542: \ ! 2543: return COSTS_N_INSNS (1); \ ! 2544: \ ! 2545: case ASHIFT: \ ! 2546: case ASHIFTRT: \ ! 2547: case LSHIFT: \ ! 2548: case LSHIFTRT: \ ! 2549: if (GET_MODE (X) == DImode) \ ! 2550: return COSTS_N_INSNS ((GET_CODE (XEXP (X, 1)) == CONST_INT) ? 12 : 4); \ ! 2551: \ ! 2552: return COSTS_N_INSNS (1); \ ! 2553: \ ! 2554: case ABS: \ ! 2555: { \ ! 2556: enum machine_mode xmode = GET_MODE (X); \ ! 2557: if (xmode == SFmode || xmode == DFmode) \ ! 2558: return COSTS_N_INSNS (1); \ ! 2559: \ ! 2560: return COSTS_N_INSNS (4); \ ! 2561: } \ ! 2562: \ ! 2563: case PLUS: \ ! 2564: case MINUS: \ ! 2565: { \ ! 2566: enum machine_mode xmode = GET_MODE (X); \ ! 2567: if (xmode == SFmode || xmode == DFmode) \ ! 2568: return COSTS_N_INSNS (2); \ ! 2569: \ ! 2570: if (xmode == DImode) \ ! 2571: return COSTS_N_INSNS (4); \ ! 2572: \ ! 2573: return COSTS_N_INSNS (1); \ ! 2574: } \ ! 2575: \ ! 2576: case NEG: \ ! 2577: return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 4 : 1); \ ! 2578: \ ! 2579: case MULT: \ ! 2580: { \ ! 2581: enum machine_mode xmode = GET_MODE (X); \ ! 2582: if (xmode == SFmode) \ ! 2583: return COSTS_N_INSNS (4); \ ! 2584: \ ! 2585: if (xmode == DFmode) \ ! 2586: return COSTS_N_INSNS (5); \ ! 2587: \ ! 2588: return COSTS_N_INSNS (12); \ ! 2589: } \ ! 2590: \ ! 2591: case DIV: \ ! 2592: case MOD: \ ! 2593: { \ ! 2594: enum machine_mode xmode = GET_MODE (X); \ ! 2595: if (xmode == SFmode) \ ! 2596: return COSTS_N_INSNS (12); \ ! 2597: \ ! 2598: if (xmode == DFmode) \ ! 2599: return COSTS_N_INSNS (19); \ ! 2600: } \ ! 2601: /* fall through */ \ ! 2602: \ ! 2603: case UDIV: \ ! 2604: case UMOD: \ ! 2605: return COSTS_N_INSNS (35); ! 2606: ! 2607: /* An expression giving the cost of an addressing mode that ! 2608: contains ADDRESS. If not defined, the cost is computed from the ! 2609: form of the ADDRESS expression and the `CONST_COSTS' values. ! 2610: ! 2611: For most CISC machines, the default cost is a good approximation ! 2612: of the true cost of the addressing mode. However, on RISC ! 2613: machines, all instructions normally have the same length and ! 2614: execution time. Hence all addresses will have equal costs. ! 2615: ! 2616: In cases where more than one form of an address is known, the ! 2617: form with the lowest cost will be used. If multiple forms have ! 2618: the same, lowest, cost, the one that is the most complex will be ! 2619: used. ! 2620: ! 2621: For example, suppose an address that is equal to the sum of a ! 2622: register and a constant is used twice in the same basic block. ! 2623: When this macro is not defined, the address will be computed in ! 2624: a register and memory references will be indirect through that ! 2625: register. On machines where the cost of the addressing mode ! 2626: containing the sum is no higher than that of a simple indirect ! 2627: reference, this will produce an additional instruction and ! 2628: possibly require an additional register. Proper specification ! 2629: of this macro eliminates this overhead for such machines. ! 2630: ! 2631: Similar use of this macro is made in strength reduction of loops. ! 2632: ! 2633: ADDRESS need not be valid as an address. In such a case, the ! 2634: cost is not relevant and can be any value; invalid addresses ! 2635: need not be assigned a different cost. ! 2636: ! 2637: On machines where an address involving more than one register is ! 2638: as cheap as an address computation involving only one register, ! 2639: defining `ADDRESS_COST' to reflect this can cause two registers ! 2640: to be live over a region of code where only one would have been ! 2641: if `ADDRESS_COST' were not defined in that manner. This effect ! 2642: should be considered in the definition of this macro. ! 2643: Equivalent costs should probably only be given to addresses with ! 2644: different numbers of registers on machines with lots of registers. ! 2645: ! 2646: This macro will normally either not be defined or be defined as ! 2647: a constant. */ ! 2648: ! 2649: #define ADDRESS_COST(ADDR) (REG_P (ADDR) ? 1 : mips_address_cost (ADDR)) ! 2650: ! 2651: /* A C expression for the cost of moving data from a register in ! 2652: class FROM to one in class TO. The classes are expressed using ! 2653: the enumeration values such as `GENERAL_REGS'. A value of 2 is ! 2654: the default; other values are interpreted relative to that. ! 2655: ! 2656: It is not required that the cost always equal 2 when FROM is the ! 2657: same as TO; on some machines it is expensive to move between ! 2658: registers if they are not general registers. ! 2659: ! 2660: If reload sees an insn consisting of a single `set' between two ! 2661: hard registers, and if `REGISTER_MOVE_COST' applied to their ! 2662: classes returns a value of 2, reload does not check to ensure ! 2663: that the constraints of the insn are met. Setting a cost of ! 2664: other than 2 will allow reload to verify that the constraints are ! 2665: met. You should do this if the `movM' pattern's constraints do ! 2666: not allow such copying. */ ! 2667: ! 2668: #define REGISTER_MOVE_COST(FROM, TO) 4 /* force reload to use constraints */ ! 2669: ! 2670: /* A C expression for the cost of a branch instruction. A value of ! 2671: 1 is the default; other values are interpreted relative to that. */ ! 2672: ! 2673: #define BRANCH_COST \ ! 2674: ((mips_cpu == PROCESSOR_R4000 || mips_cpu == PROCESSOR_R6000) ? 2 : 1) ! 2675: ! 2676: ! 2677: /* Used in by the peephole code. */ ! 2678: #define classify_op(op,mode) (mips_rtx_classify[ (int)GET_CODE (op) ]) ! 2679: #define additive_op(op,mode) ((classify_op (op,mode) & CLASS_ADD_OP) != 0) ! 2680: #define divmod_op(op,mode) ((classify_op (op,mode) & CLASS_DIVMOD_OP) != 0) ! 2681: #define unsigned_op(op,mode) ((classify_op (op,mode) & CLASS_UNSIGNED_OP) != 0) ! 2682: ! 2683: #define CLASS_ADD_OP 0x01 /* operator is PLUS/MINUS */ ! 2684: #define CLASS_DIVMOD_OP 0x02 /* operator is {,U}{DIV,MOD} */ ! 2685: #define CLASS_UNSIGNED_OP 0x04 /* operator is U{DIV,MOD} */ ! 2686: #define CLASS_CMP_OP 0x08 /* operator is comparison */ ! 2687: #define CLASS_EQUALITY_OP 0x10 /* operator is == or != */ ! 2688: #define CLASS_FCMP_OP 0x08 /* operator is fp. compare */ ! 2689: ! 2690: #define CLASS_UNS_CMP_OP (CLASS_UNSIGNED_OP | CLASS_CMP_OP) ! 2691: ! 2692: ! 2693: /* Optionally define this if you have added predicates to ! 2694: `MACHINE.c'. This macro is called within an initializer of an ! 2695: array of structures. The first field in the structure is the ! 2696: name of a predicate and the second field is an array of rtl ! 2697: codes. For each predicate, list all rtl codes that can be in ! 2698: expressions matched by the predicate. The list should have a ! 2699: trailing comma. Here is an example of two entries in the list ! 2700: for a typical RISC machine: ! 2701: ! 2702: #define PREDICATE_CODES \ ! 2703: {"gen_reg_rtx_operand", {SUBREG, REG}}, \ ! 2704: {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}}, ! 2705: ! 2706: Defining this macro does not affect the generated code (however, ! 2707: incorrect definitions that omit an rtl code that may be matched ! 2708: by the predicate can cause the compiler to malfunction). ! 2709: Instead, it allows the table built by `genrecog' to be more ! 2710: compact and efficient, thus speeding up the compiler. The most ! 2711: important predicates to include in the list specified by this ! 2712: macro are thoses used in the most insn patterns. */ ! 2713: ! 2714: #define PREDICATE_CODES \ ! 2715: {"uns_arith_operand", { REG, CONST_INT, SUBREG }}, \ ! 2716: {"arith_operand", { REG, CONST_INT, SUBREG }}, \ ! 2717: {"arith32_operand", { REG, CONST_INT, SUBREG }}, \ ! 2718: {"reg_or_0_operand", { REG, CONST_INT, SUBREG }}, \ ! 2719: {"small_int", { CONST_INT }}, \ ! 2720: {"large_int", { CONST_INT }}, \ ! 2721: {"md_register_operand", { REG }}, \ ! 2722: {"mips_const_double_ok", { CONST_DOUBLE }}, \ ! 2723: {"simple_memory_operand", { MEM, SUBREG }}, \ ! 2724: {"equality_op", { EQ, NE }}, \ ! 2725: {"cmp_op", { EQ, NE, GT, GE, GTU, GEU, LT, LE, \ ! 2726: LTU, LEU }}, \ ! 2727: {"cmp2_op", { EQ, NE, GT, GE, GTU, GEU, LT, LE, \ ! 2728: LTU, LEU }}, \ ! 2729: {"fcmp_op", { EQ, NE, GT, GE, LT, LE }}, \ ! 2730: {"pc_or_label_operand", { PC, LABEL_REF }}, \ ! 2731: {"call_insn_operand", { MEM }}, \ ! 2732: {"uns_cmp_op", { GTU, GEU, LTU, LEU }}, ! 2733: ! 2734: ! 2735: /* If defined, a C statement to be executed just prior to the ! 2736: output of assembler code for INSN, to modify the extracted ! 2737: operands so they will be output differently. ! 2738: ! 2739: Here the argument OPVEC is the vector containing the operands ! 2740: extracted from INSN, and NOPERANDS is the number of elements of ! 2741: the vector which contain meaningful data for this insn. The ! 2742: contents of this vector are what will be used to convert the ! 2743: insn template into assembler code, so you can change the ! 2744: assembler output by changing the contents of the vector. ! 2745: ! 2746: We use it to check if the current insn needs a nop in front of it ! 2747: because of load delays, and also to update the delay slot ! 2748: statistics. */ ! 2749: ! 2750: #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ ! 2751: final_prescan_insn (INSN, OPVEC, NOPERANDS) ! 2752: ! 2753: ! 2754: /* Tell final.c how to eliminate redundant test instructions. ! 2755: Here we define machine-dependent flags and fields in cc_status ! 2756: (see `conditions.h'). */ ! 2757: ! 2758: /* A C compound statement to set the components of `cc_status' ! 2759: appropriately for an insn INSN whose body is EXP. It is this ! 2760: macro's responsibility to recognize insns that set the condition ! 2761: code as a byproduct of other activity as well as those that ! 2762: explicitly set `(cc0)'. ! 2763: ! 2764: This macro is not used on machines that do not use `cc0'. */ ! 2765: ! 2766: #define NOTICE_UPDATE_CC(EXP, INSN) \ ! 2767: do \ ! 2768: { \ ! 2769: enum attr_type type = get_attr_type (INSN); \ ! 2770: if (type == TYPE_ICMP || type == TYPE_FCMP) \ ! 2771: CC_STATUS_INIT; \ ! 2772: } \ ! 2773: while (0) ! 2774: ! 2775: /* A list of names to be used for additional modes for condition code ! 2776: values in registers. These names are added to `enum machine_mode' ! 2777: and all have class `MODE_CC'. By convention, they should start ! 2778: with `CC' and end with `mode'. ! 2779: ! 2780: You should only define this macro if your machine does not use ! 2781: `cc0' and only if additional modes are required. ! 2782: ! 2783: On the MIPS, we use CC_FPmode for all floating point except for not ! 2784: equal, CC_REV_FPmode for not equal (to reverse the sense of the ! 2785: jump), CC_EQmode for integer equality/inequality comparisons, ! 2786: CC_0mode for comparisons against 0, and CCmode for other integer ! 2787: comparisons. */ ! 2788: ! 2789: #define EXTRA_CC_MODES CC_EQmode, CC_FPmode, CC_0mode, CC_REV_FPmode ! 2790: ! 2791: /* A list of C strings giving the names for the modes listed in ! 2792: `EXTRA_CC_MODES'. */ ! 2793: ! 2794: #define EXTRA_CC_NAMES "CC_EQ", "CC_FP", "CC_0", "CC_REV_FP" ! 2795: ! 2796: /* Returns a mode from class `MODE_CC' to be used when comparison ! 2797: operation code OP is applied to rtx X. */ ! 2798: ! 2799: #define SELECT_CC_MODE(OP, X, Y) \ ! 2800: (GET_MODE_CLASS (GET_MODE (X)) != MODE_FLOAT \ ! 2801: ? SImode \ ! 2802: : ((OP == NE) ? CC_REV_FPmode : CC_FPmode)) ! 2803: ! 2804: ! 2805: /* Control the assembler format that we output. */ ! 2806: ! 2807: /* Output at beginning of assembler file. ! 2808: If we are optimizing to use the global pointer, create a temporary ! 2809: file to hold all of the text stuff, and write it out to the end. ! 2810: This is needed because the MIPS assembler is evidently one pass, ! 2811: and if it hasn't seen the relevant .comm/.lcomm/.extern/.sdata ! 2812: declaration when the code is processed, it generates a two ! 2813: instruction sequence. */ ! 2814: ! 2815: #define ASM_FILE_START(STREAM) mips_asm_file_start (STREAM) ! 2816: ! 2817: /* Output to assembler file text saying following lines ! 2818: may contain character constants, extra white space, comments, etc. */ ! 2819: ! 2820: #define ASM_APP_ON " #APP\n" ! 2821: ! 2822: /* Output to assembler file text saying following lines ! 2823: no longer contain unusual constructs. */ ! 2824: ! 2825: #define ASM_APP_OFF " #NO_APP\n" ! 2826: ! 2827: /* How to refer to registers in assembler output. ! 2828: This sequence is indexed by compiler's hard-register-number (see above). ! 2829: ! 2830: In order to support the two different conventions for register names, ! 2831: we use the name of a table set up in mips.c, which is overwritten ! 2832: if -mrnames is used. */ ! 2833: ! 2834: #define REGISTER_NAMES \ ! 2835: { \ ! 2836: &mips_reg_names[ 0][0], \ ! 2837: &mips_reg_names[ 1][0], \ ! 2838: &mips_reg_names[ 2][0], \ ! 2839: &mips_reg_names[ 3][0], \ ! 2840: &mips_reg_names[ 4][0], \ ! 2841: &mips_reg_names[ 5][0], \ ! 2842: &mips_reg_names[ 6][0], \ ! 2843: &mips_reg_names[ 7][0], \ ! 2844: &mips_reg_names[ 8][0], \ ! 2845: &mips_reg_names[ 9][0], \ ! 2846: &mips_reg_names[10][0], \ ! 2847: &mips_reg_names[11][0], \ ! 2848: &mips_reg_names[12][0], \ ! 2849: &mips_reg_names[13][0], \ ! 2850: &mips_reg_names[14][0], \ ! 2851: &mips_reg_names[15][0], \ ! 2852: &mips_reg_names[16][0], \ ! 2853: &mips_reg_names[17][0], \ ! 2854: &mips_reg_names[18][0], \ ! 2855: &mips_reg_names[19][0], \ ! 2856: &mips_reg_names[20][0], \ ! 2857: &mips_reg_names[21][0], \ ! 2858: &mips_reg_names[22][0], \ ! 2859: &mips_reg_names[23][0], \ ! 2860: &mips_reg_names[24][0], \ ! 2861: &mips_reg_names[25][0], \ ! 2862: &mips_reg_names[26][0], \ ! 2863: &mips_reg_names[27][0], \ ! 2864: &mips_reg_names[28][0], \ ! 2865: &mips_reg_names[29][0], \ ! 2866: &mips_reg_names[30][0], \ ! 2867: &mips_reg_names[31][0], \ ! 2868: &mips_reg_names[32][0], \ ! 2869: &mips_reg_names[33][0], \ ! 2870: &mips_reg_names[34][0], \ ! 2871: &mips_reg_names[35][0], \ ! 2872: &mips_reg_names[36][0], \ ! 2873: &mips_reg_names[37][0], \ ! 2874: &mips_reg_names[38][0], \ ! 2875: &mips_reg_names[39][0], \ ! 2876: &mips_reg_names[40][0], \ ! 2877: &mips_reg_names[41][0], \ ! 2878: &mips_reg_names[42][0], \ ! 2879: &mips_reg_names[43][0], \ ! 2880: &mips_reg_names[44][0], \ ! 2881: &mips_reg_names[45][0], \ ! 2882: &mips_reg_names[46][0], \ ! 2883: &mips_reg_names[47][0], \ ! 2884: &mips_reg_names[48][0], \ ! 2885: &mips_reg_names[49][0], \ ! 2886: &mips_reg_names[50][0], \ ! 2887: &mips_reg_names[51][0], \ ! 2888: &mips_reg_names[52][0], \ ! 2889: &mips_reg_names[53][0], \ ! 2890: &mips_reg_names[54][0], \ ! 2891: &mips_reg_names[55][0], \ ! 2892: &mips_reg_names[56][0], \ ! 2893: &mips_reg_names[57][0], \ ! 2894: &mips_reg_names[58][0], \ ! 2895: &mips_reg_names[59][0], \ ! 2896: &mips_reg_names[60][0], \ ! 2897: &mips_reg_names[61][0], \ ! 2898: &mips_reg_names[62][0], \ ! 2899: &mips_reg_names[63][0], \ ! 2900: &mips_reg_names[64][0], \ ! 2901: &mips_reg_names[65][0], \ ! 2902: &mips_reg_names[66][0], \ ! 2903: } ! 2904: ! 2905: /* print-rtl.c can't use REGISTER_NAMES, since it depends on mips.c. ! 2906: So define this for it. */ ! 2907: #define DEBUG_REGISTER_NAMES \ ! 2908: { \ ! 2909: "$0", "at", "v0", "v1", "a0", "a1", "a2", "a3", \ ! 2910: "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", \ ! 2911: "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", \ ! 2912: "t8", "t9", "k0", "k1", "gp", "sp", "$fp", "ra", \ ! 2913: "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \ ! 2914: "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \ ! 2915: "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \ ! 2916: "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \ ! 2917: "hi", "lo", "$fcr31" \ ! 2918: } ! 2919: ! 2920: /* If defined, a C initializer for an array of structures ! 2921: containing a name and a register number. This macro defines ! 2922: additional names for hard registers, thus allowing the `asm' ! 2923: option in declarations to refer to registers using alternate ! 2924: names. ! 2925: ! 2926: We define both names for the integer registers here. */ ! 2927: ! 2928: #define ADDITIONAL_REGISTER_NAMES \ ! 2929: { \ ! 2930: { "$0", 0 + GP_REG_FIRST }, \ ! 2931: { "$1", 1 + GP_REG_FIRST }, \ ! 2932: { "$2", 2 + GP_REG_FIRST }, \ ! 2933: { "$3", 3 + GP_REG_FIRST }, \ ! 2934: { "$4", 4 + GP_REG_FIRST }, \ ! 2935: { "$5", 5 + GP_REG_FIRST }, \ ! 2936: { "$6", 6 + GP_REG_FIRST }, \ ! 2937: { "$7", 7 + GP_REG_FIRST }, \ ! 2938: { "$8", 8 + GP_REG_FIRST }, \ ! 2939: { "$9", 9 + GP_REG_FIRST }, \ ! 2940: { "$10", 10 + GP_REG_FIRST }, \ ! 2941: { "$11", 11 + GP_REG_FIRST }, \ ! 2942: { "$12", 12 + GP_REG_FIRST }, \ ! 2943: { "$13", 13 + GP_REG_FIRST }, \ ! 2944: { "$14", 14 + GP_REG_FIRST }, \ ! 2945: { "$15", 15 + GP_REG_FIRST }, \ ! 2946: { "$16", 16 + GP_REG_FIRST }, \ ! 2947: { "$17", 17 + GP_REG_FIRST }, \ ! 2948: { "$18", 18 + GP_REG_FIRST }, \ ! 2949: { "$19", 19 + GP_REG_FIRST }, \ ! 2950: { "$20", 20 + GP_REG_FIRST }, \ ! 2951: { "$21", 21 + GP_REG_FIRST }, \ ! 2952: { "$22", 22 + GP_REG_FIRST }, \ ! 2953: { "$23", 23 + GP_REG_FIRST }, \ ! 2954: { "$24", 24 + GP_REG_FIRST }, \ ! 2955: { "$25", 25 + GP_REG_FIRST }, \ ! 2956: { "$26", 26 + GP_REG_FIRST }, \ ! 2957: { "$27", 27 + GP_REG_FIRST }, \ ! 2958: { "$28", 28 + GP_REG_FIRST }, \ ! 2959: { "$29", 29 + GP_REG_FIRST }, \ ! 2960: { "$30", 30 + GP_REG_FIRST }, \ ! 2961: { "$31", 31 + GP_REG_FIRST }, \ ! 2962: { "$sp", 29 + GP_REG_FIRST }, \ ! 2963: { "$fp", 30 + GP_REG_FIRST }, \ ! 2964: { "at", 1 + GP_REG_FIRST }, \ ! 2965: { "v0", 2 + GP_REG_FIRST }, \ ! 2966: { "v1", 3 + GP_REG_FIRST }, \ ! 2967: { "a0", 4 + GP_REG_FIRST }, \ ! 2968: { "a1", 5 + GP_REG_FIRST }, \ ! 2969: { "a2", 6 + GP_REG_FIRST }, \ ! 2970: { "a3", 7 + GP_REG_FIRST }, \ ! 2971: { "t0", 8 + GP_REG_FIRST }, \ ! 2972: { "t1", 9 + GP_REG_FIRST }, \ ! 2973: { "t2", 10 + GP_REG_FIRST }, \ ! 2974: { "t3", 11 + GP_REG_FIRST }, \ ! 2975: { "t4", 12 + GP_REG_FIRST }, \ ! 2976: { "t5", 13 + GP_REG_FIRST }, \ ! 2977: { "t6", 14 + GP_REG_FIRST }, \ ! 2978: { "t7", 15 + GP_REG_FIRST }, \ ! 2979: { "s0", 16 + GP_REG_FIRST }, \ ! 2980: { "s1", 17 + GP_REG_FIRST }, \ ! 2981: { "s2", 18 + GP_REG_FIRST }, \ ! 2982: { "s3", 19 + GP_REG_FIRST }, \ ! 2983: { "s4", 20 + GP_REG_FIRST }, \ ! 2984: { "s5", 21 + GP_REG_FIRST }, \ ! 2985: { "s6", 22 + GP_REG_FIRST }, \ ! 2986: { "s7", 23 + GP_REG_FIRST }, \ ! 2987: { "t8", 24 + GP_REG_FIRST }, \ ! 2988: { "t9", 25 + GP_REG_FIRST }, \ ! 2989: { "k0", 26 + GP_REG_FIRST }, \ ! 2990: { "k1", 27 + GP_REG_FIRST }, \ ! 2991: { "gp", 28 + GP_REG_FIRST }, \ ! 2992: { "sp", 29 + GP_REG_FIRST }, \ ! 2993: { "fp", 30 + GP_REG_FIRST }, \ ! 2994: { "ra", 31 + GP_REG_FIRST }, \ ! 2995: { "$sp", 29 + GP_REG_FIRST }, \ ! 2996: { "$fp", 30 + GP_REG_FIRST }, \ ! 2997: { "cc", FPSW_REGNUM }, \ ! 2998: } ! 2999: ! 3000: /* Define results of standard character escape sequences. */ ! 3001: #define TARGET_BELL 007 ! 3002: #define TARGET_BS 010 ! 3003: #define TARGET_TAB 011 ! 3004: #define TARGET_NEWLINE 012 ! 3005: #define TARGET_VT 013 ! 3006: #define TARGET_FF 014 ! 3007: #define TARGET_CR 015 ! 3008: ! 3009: /* A C compound statement to output to stdio stream STREAM the ! 3010: assembler syntax for an instruction operand X. X is an RTL ! 3011: expression. ! 3012: ! 3013: CODE is a value that can be used to specify one of several ways ! 3014: of printing the operand. It is used when identical operands ! 3015: must be printed differently depending on the context. CODE ! 3016: comes from the `%' specification that was used to request ! 3017: printing of the operand. If the specification was just `%DIGIT' ! 3018: then CODE is 0; if the specification was `%LTR DIGIT' then CODE ! 3019: is the ASCII code for LTR. ! 3020: ! 3021: If X is a register, this macro should print the register's name. ! 3022: The names can be found in an array `reg_names' whose type is ! 3023: `char *[]'. `reg_names' is initialized from `REGISTER_NAMES'. ! 3024: ! 3025: When the machine description has a specification `%PUNCT' (a `%' ! 3026: followed by a punctuation character), this macro is called with ! 3027: a null pointer for X and the punctuation character for CODE. ! 3028: ! 3029: See mips.c for the MIPS specific codes. */ ! 3030: ! 3031: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) ! 3032: ! 3033: /* A C expression which evaluates to true if CODE is a valid ! 3034: punctuation character for use in the `PRINT_OPERAND' macro. If ! 3035: `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no ! 3036: punctuation characters (except for the standard one, `%') are ! 3037: used in this way. */ ! 3038: ! 3039: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE] ! 3040: ! 3041: /* A C compound statement to output to stdio stream STREAM the ! 3042: assembler syntax for an instruction operand that is a memory ! 3043: reference whose address is ADDR. ADDR is an RTL expression. ! 3044: ! 3045: On some machines, the syntax for a symbolic address depends on ! 3046: the section that the address refers to. On these machines, ! 3047: define the macro `ENCODE_SECTION_INFO' to store the information ! 3048: into the `symbol_ref', and then check for it here. */ ! 3049: ! 3050: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) ! 3051: ! 3052: ! 3053: /* A C statement, to be executed after all slot-filler instructions ! 3054: have been output. If necessary, call `dbr_sequence_length' to ! 3055: determine the number of slots filled in a sequence (zero if not ! 3056: currently outputting a sequence), to decide how many no-ops to ! 3057: output, or whatever. ! 3058: ! 3059: Don't define this macro if it has nothing to do, but it is ! 3060: helpful in reading assembly output if the extent of the delay ! 3061: sequence is made explicit (e.g. with white space). ! 3062: ! 3063: Note that output routines for instructions with delay slots must ! 3064: be prepared to deal with not being output as part of a sequence ! 3065: (i.e. when the scheduling pass is not run, or when no slot ! 3066: fillers could be found.) The variable `final_sequence' is null ! 3067: when not processing a sequence, otherwise it contains the ! 3068: `sequence' rtx being output. */ ! 3069: ! 3070: #define DBR_OUTPUT_SEQEND(STREAM) \ ! 3071: do \ ! 3072: { \ ! 3073: if (set_nomacro > 0 && --set_nomacro == 0) \ ! 3074: fputs ("\t.set\tmacro\n", STREAM); \ ! 3075: \ ! 3076: if (set_noreorder > 0 && --set_noreorder == 0) \ ! 3077: fputs ("\t.set\treorder\n", STREAM); \ ! 3078: \ ! 3079: dslots_jump_filled++; \ ! 3080: fputs ("\n", STREAM); \ ! 3081: } \ ! 3082: while (0) ! 3083: ! 3084: ! 3085: /* How to tell the debugger about changes of source files. Note, the ! 3086: mips ECOFF format cannot deal with changes of files inside of ! 3087: functions, which means the output of parser generators like bison ! 3088: is generally not debuggable without using the -l switch. Lose, ! 3089: lose, lose. Silicon graphics seems to want all .file's hardwired ! 3090: to 1. */ ! 3091: ! 3092: #ifndef SET_FILE_NUMBER ! 3093: #define SET_FILE_NUMBER() ++num_source_filenames ! 3094: #endif ! 3095: ! 3096: #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ ! 3097: mips_output_filename (STREAM, NAME) ! 3098: ! 3099: /* This is how to output a note the debugger telling it the line number ! 3100: to which the following sequence of instructions corresponds. ! 3101: Silicon graphics puts a label after each .loc. */ ! 3102: ! 3103: #ifndef LABEL_AFTER_LOC ! 3104: #define LABEL_AFTER_LOC(STREAM) ! 3105: #endif ! 3106: ! 3107: #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \ ! 3108: mips_output_lineno (STREAM, LINE) ! 3109: ! 3110: /* The MIPS implementation uses some labels for it's own purposed. The ! 3111: following lists what labels are created, and are all formed by the ! 3112: pattern $L[a-z].*. The machine independent portion of GCC creates ! 3113: labels matching: $L[A-Z][0-9]+ and $L[0-9]+. ! 3114: ! 3115: LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt. ! 3116: $Lb[0-9]+ Begin blocks for MIPS debug support ! 3117: $Lc[0-9]+ Label for use in s<xx> operation. ! 3118: $Le[0-9]+ End blocks for MIPS debug support ! 3119: $Lp\..+ Half-pic labels. */ ! 3120: ! 3121: /* This is how to output the definition of a user-level label named NAME, ! 3122: such as the label on a static function or variable NAME. ! 3123: ! 3124: If we are optimizing the gp, remember that this label has been put ! 3125: out, so we know not to emit an .extern for it in mips_asm_file_end. ! 3126: We use one of the common bits in the IDENTIFIER tree node for this, ! 3127: since those bits seem to be unused, and we don't have any method ! 3128: of getting the decl nodes from the name. */ ! 3129: ! 3130: #define ASM_OUTPUT_LABEL(STREAM,NAME) \ ! 3131: do { \ ! 3132: assemble_name (STREAM, NAME); \ ! 3133: fputs (":\n", STREAM); \ ! 3134: } while (0) ! 3135: ! 3136: ! 3137: /* A C statement (sans semicolon) to output to the stdio stream ! 3138: STREAM any text necessary for declaring the name NAME of an ! 3139: initialized variable which is being defined. This macro must ! 3140: output the label definition (perhaps using `ASM_OUTPUT_LABEL'). ! 3141: The argument DECL is the `VAR_DECL' tree node representing the ! 3142: variable. ! 3143: ! 3144: If this macro is not defined, then the variable name is defined ! 3145: in the usual manner as a label (by means of `ASM_OUTPUT_LABEL'). */ ! 3146: ! 3147: #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ ! 3148: do \ ! 3149: { \ ! 3150: mips_declare_object (STREAM, NAME, "", ":\n", 0); \ ! 3151: HALF_PIC_DECLARE (NAME); \ ! 3152: } \ ! 3153: while (0) ! 3154: ! 3155: ! 3156: /* This is how to output a command to make the user-level label named NAME ! 3157: defined for reference from other files. */ ! 3158: ! 3159: #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \ ! 3160: do { \ ! 3161: fputs ("\t.globl\t", STREAM); \ ! 3162: assemble_name (STREAM, NAME); \ ! 3163: fputs ("\n", STREAM); \ ! 3164: } while (0) ! 3165: ! 3166: /* This says how to define a global common symbol. */ ! 3167: ! 3168: #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ ! 3169: mips_declare_object (STREAM, NAME, "\n\t.comm\t", ",%u\n", (ROUNDED)) ! 3170: ! 3171: /* This says how to define a local common symbol (ie, not visible to ! 3172: linker). */ ! 3173: ! 3174: #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \ ! 3175: mips_declare_object (STREAM, NAME, "\n\t.lcomm\t", ",%u\n", (ROUNDED)) ! 3176: ! 3177: ! 3178: /* This says how to output an external. It would be possible not to ! 3179: output anything and let undefined symbol become external. However ! 3180: the assembler uses length information on externals to allocate in ! 3181: data/sdata bss/sbss, thereby saving exec time. */ ! 3182: ! 3183: #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \ ! 3184: mips_output_external(STREAM,DECL,NAME) ! 3185: ! 3186: /* This says what to print at the end of the assembly file */ ! 3187: #define ASM_FILE_END(STREAM) mips_asm_file_end(STREAM) ! 3188: ! 3189: ! 3190: /* This is how to declare a function name. The actual work of ! 3191: emitting the label is moved to function_prologue, so that we can ! 3192: get the line number correctly emitted before the .ent directive, ! 3193: and after any .file directives. ! 3194: ! 3195: Also, switch files if we are optimizing the global pointer. */ ! 3196: ! 3197: #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \ ! 3198: { \ ! 3199: extern FILE *asm_out_text_file; \ ! 3200: if (TARGET_GP_OPT) \ ! 3201: STREAM = asm_out_text_file; \ ! 3202: \ ! 3203: current_function_name = NAME; \ ! 3204: HALF_PIC_DECLARE (NAME); \ ! 3205: } ! 3206: ! 3207: /* This is how to output a reference to a user-level label named NAME. ! 3208: `assemble_name' uses this. */ ! 3209: ! 3210: #define ASM_OUTPUT_LABELREF(STREAM,NAME) fprintf (STREAM, "%s", NAME) ! 3211: ! 3212: /* This is how to output an internal numbered label where ! 3213: PREFIX is the class of label and NUM is the number within the class. */ ! 3214: ! 3215: #define ASM_OUTPUT_INTERNAL_LABEL(STREAM,PREFIX,NUM) \ ! 3216: fprintf (STREAM, "$%s%d:\n", PREFIX, NUM) ! 3217: ! 3218: /* This is how to store into the string LABEL ! 3219: the symbol_ref name of an internal numbered label where ! 3220: PREFIX is the class of label and NUM is the number within the class. ! 3221: This is suitable for output with `assemble_name'. */ ! 3222: ! 3223: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ ! 3224: sprintf (LABEL, "*$%s%d", PREFIX, NUM) ! 3225: ! 3226: /* This is how to output an assembler line defining a `double' constant. */ ! 3227: ! 3228: #define ASM_OUTPUT_DOUBLE(STREAM,VALUE) \ ! 3229: mips_output_double (STREAM, VALUE) ! 3230: ! 3231: ! 3232: /* This is how to output an assembler line defining a `float' constant. */ ! 3233: ! 3234: #define ASM_OUTPUT_FLOAT(STREAM,VALUE) \ ! 3235: mips_output_float (STREAM, VALUE) ! 3236: ! 3237: ! 3238: /* This is how to output an assembler line defining an `int' constant. */ ! 3239: ! 3240: #define ASM_OUTPUT_INT(STREAM,VALUE) \ ! 3241: do { \ ! 3242: fprintf (STREAM, "\t.word\t"); \ ! 3243: output_addr_const (STREAM, (VALUE)); \ ! 3244: fprintf (STREAM, "\n"); \ ! 3245: } while (0) ! 3246: ! 3247: /* Likewise for `char' and `short' constants. */ ! 3248: ! 3249: #define ASM_OUTPUT_SHORT(STREAM,VALUE) \ ! 3250: { \ ! 3251: fprintf (STREAM, "\t.half\t"); \ ! 3252: output_addr_const (STREAM, (VALUE)); \ ! 3253: fprintf (STREAM, "\n"); \ ! 3254: } ! 3255: ! 3256: #define ASM_OUTPUT_CHAR(STREAM,VALUE) \ ! 3257: { \ ! 3258: fprintf (STREAM, "\t.byte\t"); \ ! 3259: output_addr_const (STREAM, (VALUE)); \ ! 3260: fprintf (STREAM, "\n"); \ ! 3261: } ! 3262: ! 3263: /* This is how to output an assembler line for a numeric constant byte. */ ! 3264: ! 3265: #define ASM_OUTPUT_BYTE(STREAM,VALUE) \ ! 3266: fprintf (STREAM, "\t.byte\t0x%x\n", (VALUE)) ! 3267: ! 3268: /* This is how to output an element of a case-vector that is absolute. */ ! 3269: ! 3270: #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ ! 3271: fprintf (STREAM, "\t.word\t$L%d\n", VALUE) ! 3272: ! 3273: /* This is how to output an element of a case-vector that is relative. ! 3274: (We do not use such vectors, ! 3275: but we must define this macro anyway.) */ ! 3276: ! 3277: #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, VALUE, REL) \ ! 3278: fprintf (STREAM, "\t.word\t$L%d-$L%d\n", VALUE, REL) ! 3279: ! 3280: /* This is how to emit the initial label for switch statements. We ! 3281: need to put the switch labels somewhere else from the text section, ! 3282: because the MIPS assembler gets real confused about line numbers if ! 3283: .word's appear in the text section. */ ! 3284: ! 3285: #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, JUMPTABLE) \ ! 3286: { \ ! 3287: rdata_section (); \ ! 3288: ASM_OUTPUT_ALIGN (STREAM, 2); \ ! 3289: ASM_OUTPUT_INTERNAL_LABEL (STREAM, PREFIX, NUM); \ ! 3290: } ! 3291: ! 3292: /* This is how to output an assembler line ! 3293: that says to advance the location counter ! 3294: to a multiple of 2**LOG bytes. */ ! 3295: ! 3296: #define ASM_OUTPUT_ALIGN(STREAM,LOG) \ ! 3297: { \ ! 3298: int mask = (1 << (LOG)) - 1; \ ! 3299: fprintf (STREAM, "\t.align\t%d\n", (LOG)); \ ! 3300: } ! 3301: ! 3302: /* This is how to output an assembler line to to advance the location ! 3303: counter by SIZE bytes. */ ! 3304: ! 3305: #define ASM_OUTPUT_SKIP(STREAM,SIZE) \ ! 3306: fprintf (STREAM, "\t.space\t%u\n", (SIZE)) ! 3307: ! 3308: ! 3309: /* This is how to output a string. */ ! 3310: #define ASM_OUTPUT_ASCII(STREAM, STRING, LEN) \ ! 3311: do { \ ! 3312: register int i, c, len = (LEN), cur_pos = 17; \ ! 3313: register unsigned char *string = (unsigned char *)(STRING); \ ! 3314: fprintf ((STREAM), "\t.ascii\t\""); \ ! 3315: for (i = 0; i < len; i++) \ ! 3316: { \ ! 3317: register int c = string[i]; \ ! 3318: \ ! 3319: switch (c) \ ! 3320: { \ ! 3321: case '\"': \ ! 3322: case '\\': \ ! 3323: putc ('\\', (STREAM)); \ ! 3324: putc (c, (STREAM)); \ ! 3325: cur_pos += 2; \ ! 3326: break; \ ! 3327: \ ! 3328: case TARGET_NEWLINE: \ ! 3329: fputs ("\\n", (STREAM)); \ ! 3330: if (i+1 < len \ ! 3331: && (((c = string[i+1]) >= '\040' && c <= '~') \ ! 3332: || c == TARGET_TAB)) \ ! 3333: cur_pos = 32767; /* break right here */ \ ! 3334: else \ ! 3335: cur_pos += 2; \ ! 3336: break; \ ! 3337: \ ! 3338: case TARGET_TAB: \ ! 3339: fputs ("\\t", (STREAM)); \ ! 3340: cur_pos += 2; \ ! 3341: break; \ ! 3342: \ ! 3343: case TARGET_FF: \ ! 3344: fputs ("\\f", (STREAM)); \ ! 3345: cur_pos += 2; \ ! 3346: break; \ ! 3347: \ ! 3348: case TARGET_BS: \ ! 3349: fputs ("\\b", (STREAM)); \ ! 3350: cur_pos += 2; \ ! 3351: break; \ ! 3352: \ ! 3353: case TARGET_CR: \ ! 3354: fputs ("\\r", (STREAM)); \ ! 3355: cur_pos += 2; \ ! 3356: break; \ ! 3357: \ ! 3358: default: \ ! 3359: if (c >= ' ' && c < 0177) \ ! 3360: { \ ! 3361: putc (c, (STREAM)); \ ! 3362: cur_pos++; \ ! 3363: } \ ! 3364: else \ ! 3365: { \ ! 3366: fprintf ((STREAM), "\\%03o", c); \ ! 3367: cur_pos += 4; \ ! 3368: } \ ! 3369: } \ ! 3370: \ ! 3371: if (cur_pos > 72 && i+1 < len) \ ! 3372: { \ ! 3373: cur_pos = 17; \ ! 3374: fprintf ((STREAM), "\"\n\t.ascii\t\""); \ ! 3375: } \ ! 3376: } \ ! 3377: fprintf ((STREAM), "\"\n"); \ ! 3378: } while (0) ! 3379: ! 3380: /* Handle certain cpp directives used in header files on sysV. */ ! 3381: #define SCCS_DIRECTIVE ! 3382: ! 3383: /* Output #ident as a in the read-only data section. */ ! 3384: #define ASM_OUTPUT_IDENT(FILE, STRING) \ ! 3385: { \ ! 3386: char *p = STRING; \ ! 3387: int size = strlen (p) + 1; \ ! 3388: rdata_section (); \ ! 3389: assemble_string (p, size); \ ! 3390: } ! 3391: ! 3392: /* Default to -G 8 */ ! 3393: #ifndef MIPS_DEFAULT_GVALUE ! 3394: #define MIPS_DEFAULT_GVALUE 8 ! 3395: #endif ! 3396: ! 3397: /* Define the strings to put out for each section in the object file. */ ! 3398: #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */ ! 3399: #define DATA_SECTION_ASM_OP "\t.data" /* large data */ ! 3400: #define SDATA_SECTION_ASM_OP "\t.sdata" /* small data */ ! 3401: #define RDATA_SECTION_ASM_OP "\t.rdata" /* read-only data */ ! 3402: #define READONLY_DATA_SECTION rdata_section ! 3403: ! 3404: /* What other sections we support other than the normal .data/.text. */ ! 3405: ! 3406: #define EXTRA_SECTIONS in_sdata, in_rdata, in_last_p1 ! 3407: ! 3408: /* Define the additional functions to select our additional sections. */ ! 3409: ! 3410: /* on the MIPS it is not a good idea to put constants in the text ! 3411: section, since this defeats the sdata/data mechanism. This is ! 3412: especially true when -O is used. In this case an effort is made to ! 3413: address with faster (gp) register relative addressing, which can ! 3414: only get at sdata and sbss items (there is no stext !!) However, ! 3415: if the constant is too large for sdata, and it's readonly, it ! 3416: will go into the .rdata section. */ ! 3417: ! 3418: #define EXTRA_SECTION_FUNCTIONS \ ! 3419: void \ ! 3420: sdata_section () \ ! 3421: { \ ! 3422: if (in_section != in_sdata) \ ! 3423: { \ ! 3424: fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \ ! 3425: in_section = in_sdata; \ ! 3426: } \ ! 3427: } \ ! 3428: \ ! 3429: void \ ! 3430: rdata_section () \ ! 3431: { \ ! 3432: if (in_section != in_rdata) \ ! 3433: { \ ! 3434: fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP); \ ! 3435: in_section = in_rdata; \ ! 3436: } \ ! 3437: } ! 3438: ! 3439: /* Given a decl node or constant node, choose the section to output it in ! 3440: and select that section. */ ! 3441: ! 3442: #define SELECT_RTX_SECTION(MODE,RTX) \ ! 3443: { \ ! 3444: if ((GET_MODE_SIZE(MODE) / BITS_PER_UNIT) <= mips_section_threshold \ ! 3445: && mips_section_threshold > 0) \ ! 3446: sdata_section (); \ ! 3447: else \ ! 3448: rdata_section (); \ ! 3449: } \ ! 3450: ! 3451: #define SELECT_SECTION(DECL, RELOC) \ ! 3452: { \ ! 3453: int size = int_size_in_bytes (TREE_TYPE (DECL)); \ ! 3454: \ ! 3455: if (size > 0 && size <= mips_section_threshold) \ ! 3456: sdata_section (); \ ! 3457: \ ! 3458: else if (RELOC) \ ! 3459: data_section (); \ ! 3460: \ ! 3461: else if (TREE_CODE (DECL) == STRING_CST) \ ! 3462: { \ ! 3463: if (flag_writable_strings) \ ! 3464: data_section (); \ ! 3465: else \ ! 3466: rdata_section (); \ ! 3467: } \ ! 3468: \ ! 3469: else if (TREE_CODE (DECL) != VAR_DECL) \ ! 3470: rdata_section (); \ ! 3471: \ ! 3472: else if (!TREE_READONLY (DECL)) \ ! 3473: data_section (); \ ! 3474: \ ! 3475: else \ ! 3476: rdata_section (); \ ! 3477: } ! 3478: ! 3479: ! 3480: /* Store in OUTPUT a string (made with alloca) containing ! 3481: an assembler-name for a local static variable named NAME. ! 3482: LABELNO is an integer which is different for each call. */ ! 3483: ! 3484: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ ! 3485: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ ! 3486: sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) ! 3487: ! 3488: #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \ ! 3489: do \ ! 3490: { \ ! 3491: fprintf (STREAM, "\tsubu\t%s,%s,8\n\tsw\t%s,0(%s)\n", \ ! 3492: reg_names[STACK_POINTER_REGNUM], \ ! 3493: reg_names[STACK_POINTER_REGNUM], \ ! 3494: reg_names[REGNO], \ ! 3495: reg_names[STACK_POINTER_REGNUM]); \ ! 3496: } \ ! 3497: while (0) ! 3498: ! 3499: #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \ ! 3500: do \ ! 3501: { \ ! 3502: if (! set_noreorder) \ ! 3503: fprintf (STREAM, "\t.set\tnoreorder\n"); \ ! 3504: \ ! 3505: dslots_load_total++; \ ! 3506: dslots_load_filled++; \ ! 3507: fprintf (STREAM, "\tlw\t%s,0(%s)\n\taddu\t%s,%s,8\n", \ ! 3508: reg_names[REGNO], \ ! 3509: reg_names[STACK_POINTER_REGNUM], \ ! 3510: reg_names[STACK_POINTER_REGNUM], \ ! 3511: reg_names[STACK_POINTER_REGNUM]); \ ! 3512: \ ! 3513: if (! set_noreorder) \ ! 3514: fprintf (STREAM, "\t.set\treorder\n"); \ ! 3515: } \ ! 3516: while (0) ! 3517: ! 3518: /* Define the parentheses used to group arithmetic operations ! 3519: in assembler code. */ ! 3520: ! 3521: #define ASM_OPEN_PAREN "(" ! 3522: #define ASM_CLOSE_PAREN ")" ! 3523: ! 3524: /* How to start an assembler comment. */ ! 3525: #ifndef ASM_COMMENT_START ! 3526: #define ASM_COMMENT_START "\t\t# " ! 3527: #endif ! 3528: ! 3529: ! 3530: ! 3531: /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for ! 3532: and mips-tdump.c to print them out. ! 3533: ! 3534: These must match the corresponding definitions in gdb/mipsread.c. ! 3535: Unfortunately, gcc and gdb do not currently share any directories. */ ! 3536: ! 3537: #define CODE_MASK 0x8F300 ! 3538: #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) ! 3539: #define MIPS_MARK_STAB(code) ((code)+CODE_MASK) ! 3540: #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK) ! 3541: ! 3542: ! 3543: /* Default definitions for size_t and ptrdiff_t. */ ! 3544: ! 3545: #ifndef SIZE_TYPE ! 3546: #define SIZE_TYPE "unsigned int" ! 3547: #endif ! 3548: ! 3549: #ifndef PTRDIFF_TYPE ! 3550: #define PTRDIFF_TYPE "int" ! 3551: #endif ! 3552:
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