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1.1 ! root 1: /* Definitions of target machine for GNU compiler. MIPS version. ! 2: Contributed by A. Lichnewsky, [email protected] ! 3: Changed by Michael Meissner, [email protected] ! 4: Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc. ! 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 int target_flags; ! 32: extern int optimize; ! 33: extern int may_call_alloca; ! 34: extern int current_function_calls_alloca; ! 35: extern int frame_pointer_needed; ! 36: extern int flag_omit_frame_pointer; ! 37: ! 38: /* MIPS external variables defined in mips.c. */ ! 39: ! 40: /* comparison type */ ! 41: enum cmp_type { ! 42: CMP_SI, /* compare integers */ ! 43: CMP_SF, /* compare single precision floats */ ! 44: CMP_DF, /* compare double precision floats */ ! 45: CMP_MAX /* max comparison type */ ! 46: }; ! 47: ! 48: /* types of delay slot */ ! 49: enum delay_type { ! 50: DELAY_NONE, /* no delay slot */ ! 51: DELAY_LOAD, /* load from memory delay */ ! 52: DELAY_HILO /* move from/to hi/lo registers */ ! 53: }; ! 54: ! 55: /* Which processor to schedule for. Since there is no difference between ! 56: a R2000 and R3000 in terms of the scheduler, we collapse them into ! 57: just an R3000. */ ! 58: ! 59: enum processor_type { ! 60: PROCESSOR_DEFAULT, ! 61: PROCESSOR_R3000, ! 62: PROCESSOR_R6000, ! 63: PROCESSOR_R4000 ! 64: }; ! 65: ! 66: extern char mips_reg_names[][8]; /* register names (a0 vs. $4). */ ! 67: extern char mips_print_operand_punct[]; /* print_operand punctuation chars */ ! 68: extern char *current_function_name; /* current function being compiled */ ! 69: extern char *current_function_file; /* filename current function is in */ ! 70: extern int num_source_filenames; /* current .file # */ ! 71: extern int inside_function; /* != 0 if inside of a function */ ! 72: extern int ignore_line_number; /* != 0 if we are to ignore next .loc */ ! 73: extern int file_in_function_warning; /* warning given about .file in func */ ! 74: extern int sdb_label_count; /* block start/end next label # */ ! 75: extern int mips_section_threshold; /* # bytes of data/sdata cutoff */ ! 76: extern int g_switch_value; /* value of the -G xx switch */ ! 77: extern int g_switch_set; /* whether -G xx was passed. */ ! 78: extern int sym_lineno; /* sgi next label # for each stmt */ ! 79: extern int set_noreorder; /* # of nested .set noreorder's */ ! 80: extern int set_nomacro; /* # of nested .set nomacro's */ ! 81: extern int set_noat; /* # of nested .set noat's */ ! 82: extern int set_volatile; /* # of nested .set volatile's */ ! 83: extern int mips_branch_likely; /* emit 'l' after br (branch likely) */ ! 84: extern int mips_dbx_regno[]; /* Map register # to debug register # */ ! 85: extern char mips_rtx_classify[]; /* classify an RTX code */ ! 86: extern struct rtx_def *branch_cmp[2]; /* operands for compare */ ! 87: extern enum cmp_type branch_type; /* what type of branch to use */ ! 88: extern enum processor_type mips_cpu; /* which cpu are we scheduling for */ ! 89: extern int mips_isa; /* architectural level */ ! 90: extern char *mips_cpu_string; /* for -mcpu=<xxx> */ ! 91: extern char *mips_isa_string; /* for -mips{1,2,3} */ ! 92: extern int dslots_load_total; /* total # load related delay slots */ ! 93: extern int dslots_load_filled; /* # filled load delay slots */ ! 94: extern int dslots_jump_total; /* total # jump related delay slots */ ! 95: extern int dslots_jump_filled; /* # filled jump delay slots */ ! 96: extern int dslots_number_nops; /* # of nops needed by previous insn */ ! 97: extern int num_refs[3]; /* # 1/2/3 word references */ ! 98: extern struct rtx_def *mips_load_reg; /* register to check for load delay */ ! 99: extern struct rtx_def *mips_load_reg2; /* 2nd reg to check for load delay */ ! 100: extern struct rtx_def *mips_load_reg3; /* 3rd reg to check for load delay */ ! 101: extern struct rtx_def *mips_load_reg4; /* 4th reg to check for load delay */ ! 102: ! 103: /* Functions within mips.c that we reference. */ ! 104: ! 105: extern void abort_with_insn (); ! 106: extern int arith32_operand (); ! 107: extern int arith_operand (); ! 108: extern int call_memory_operand (); ! 109: extern int cmp_op (); ! 110: extern int cmp2_op (); ! 111: extern unsigned long compute_frame_size (); ! 112: extern void expand_block_move (); ! 113: extern int equality_op (); ! 114: extern int fcmp_op (); ! 115: extern struct rtx_def * function_arg (); ! 116: extern void function_arg_advance (); ! 117: extern int function_arg_partial_nregs (); ! 118: extern void function_epilogue (); ! 119: extern void function_prologue (); ! 120: extern void gen_conditional_branch (); ! 121: extern void init_cumulative_args (); ! 122: extern int large_int (); ! 123: extern int md_register_operand (); ! 124: extern int mips_address_cost (); ! 125: extern void mips_asm_file_end (); ! 126: extern void mips_asm_file_start (); ! 127: extern int mips_const_double_ok (); ! 128: extern void mips_count_memory_refs (); ! 129: extern int mips_debugger_offset (); ! 130: extern int mips_epilogue_delay_slots (); ! 131: extern char *mips_fill_delay_slot (); ! 132: extern char *mips_move_1word (); ! 133: extern char *mips_move_2words (); ! 134: extern int mips_output_external (); ! 135: extern void mips_output_filename (); ! 136: extern void mips_output_lineno (); ! 137: extern void override_options (); ! 138: extern void print_operand_address (); ! 139: extern void print_operand (); ! 140: extern void print_options (); ! 141: extern int reg_or_0_operand (); ! 142: extern int simple_memory_operand (); ! 143: extern int small_int (); ! 144: extern void trace(); ! 145: extern int uns_arith_operand (); ! 146: extern int uns_cmp_op (); ! 147: ! 148: /* Functions in varasm.c that we reference. */ ! 149: extern void data_section (); ! 150: extern void rdata_section (); ! 151: extern void readonly_data_section (); ! 152: extern void sdata_section (); ! 153: extern void text_section (); ! 154: ! 155: /* Stubs for half-pic support if not OSF/1 reference platform. */ ! 156: ! 157: #ifndef HALF_PIC_P ! 158: #define HALF_PIC_P() 0 ! 159: #define HALF_PIC_ENCODE(DECL) ! 160: #define HALF_PIC_INIT() error ("half-pic init called on systems that don't support it.") ! 161: #define HALF_PIC_ADDRESS_P(X) 0 ! 162: #endif ! 163: ! 164: ! 165: /* Switch Recognition by gcc.c. Add -G xx support */ ! 166: ! 167: #ifdef SWITCH_TAKES_ARG ! 168: #undef SWITCH_TAKES_ARG ! 169: #endif ! 170: ! 171: #define SWITCH_TAKES_ARG(CHAR) \ ! 172: ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \ ! 173: || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \ ! 174: || (CHAR) == 'I' || (CHAR) == 'm' \ ! 175: || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'G') ! 176: ! 177: /* Sometimes certain combinations of command options do not make sense ! 178: on a particular target machine. You can define a macro ! 179: `OVERRIDE_OPTIONS' to take account of this. This macro, if ! 180: defined, is executed once just after all the command options have ! 181: been parsed. ! 182: ! 183: On the MIPS, it is used to handle -G. We also use it to set up all ! 184: of the tables referenced in the other macros. */ ! 185: ! 186: #define OVERRIDE_OPTIONS override_options () ! 187: ! 188: /* Zero or more C statements that may conditionally modify two ! 189: variables `fixed_regs' and `call_used_regs' (both of type `char ! 190: []') after they have been initialized from the two preceding ! 191: macros. ! 192: ! 193: This is necessary in case the fixed or call-clobbered registers ! 194: depend on target flags. ! 195: ! 196: You need not define this macro if it has no work to do. ! 197: ! 198: If the usage of an entire class of registers depends on the target ! 199: flags, you may indicate this to GCC by using this macro to modify ! 200: `fixed_regs' and `call_used_regs' to 1 for each of the registers in ! 201: the classes which should not be used by GCC. Also define the macro ! 202: `REG_CLASS_FROM_LETTER' to return `NO_REGS' if it is called with a ! 203: letter for a class that shouldn't be used. ! 204: ! 205: (However, if this class is not included in `GENERAL_REGS' and all ! 206: of the insn patterns whose constraints permit this class are ! 207: controlled by target switches, then GCC will automatically avoid ! 208: using these registers when the target switches are opposed to ! 209: them.) */ ! 210: ! 211: #define CONDITIONAL_REGISTER_USAGE \ ! 212: do \ ! 213: { \ ! 214: if (!TARGET_HARD_FLOAT) \ ! 215: { \ ! 216: int regno; \ ! 217: \ ! 218: for (regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++) \ ! 219: fixed_regs[regno] = call_used_regs[regno] = 1; \ ! 220: } \ ! 221: } \ ! 222: while (0) ! 223: ! 224: ! 225: /* Some machines may desire to change what optimizations are ! 226: performed for various optimization levels. This macro, if ! 227: defined, is executed once just after the optimization level is ! 228: determined and before the remainder of the command options have ! 229: been parsed. Values set in this macro are used as the default ! 230: values for the other command line options. ! 231: ! 232: LEVEL is the optimization level specified; 2 if -O2 is ! 233: specified, 1 if -O is specified, and 0 if neither is specified. */ ! 234: ! 235: #define OPTIMIZATION_OPTIONS(LEVEL) \ ! 236: { \ ! 237: if (LEVEL) \ ! 238: { \ ! 239: flag_omit_frame_pointer = TRUE; \ ! 240: flag_delayed_branch = TRUE; \ ! 241: flag_thread_jumps = TRUE; \ ! 242: flag_schedule_insns_after_reload = TRUE; \ ! 243: } \ ! 244: \ ! 245: if (LEVEL >= 2) \ ! 246: { \ ! 247: flag_strength_reduce = TRUE; \ ! 248: flag_cse_follow_jumps = TRUE; \ ! 249: flag_expensive_optimizations = TRUE; \ ! 250: flag_rerun_cse_after_loop = TRUE; \ ! 251: flag_schedule_insns = TRUE; \ ! 252: flag_caller_saves = TRUE; \ ! 253: } \ ! 254: \ ! 255: if (LEVEL >= 3) \ ! 256: { \ ! 257: flag_inline_functions = TRUE; \ ! 258: } \ ! 259: } ! 260: ! 261: ! 262: ! 263: /* Complain about missing specs and predefines that should be defined in each ! 264: of the target tm files to override the defaults. This is mostly a place- ! 265: holder until I can get each of the files updated [mm]. */ ! 266: ! 267: #if defined(OSF_OS) \ ! 268: || defined(DECSTATION) \ ! 269: || defined(SGI_TARGET) \ ! 270: || defined(MIPS_NEWS) \ ! 271: || defined(MIPS_SYSV) \ ! 272: || defined(MIPS_BSD43) ! 273: ! 274: #ifndef CPP_PREDEFINES ! 275: #error "Define CPP_PREDEFINES in the appropriate tm.h file" ! 276: #endif ! 277: ! 278: #ifndef CPP_SPEC ! 279: #error "Define CPP_SPEC in the appropriate tm.h file" ! 280: #endif ! 281: ! 282: #ifndef LINK_SPEC ! 283: #error "Define LINK_SPEC in the appropriate tm.h file" ! 284: #endif ! 285: ! 286: #ifndef LIB_SPEC ! 287: #error "Define LIB_SPEC in the appropriate tm.h file" ! 288: #endif ! 289: ! 290: #ifndef STARTFILE_SPEC ! 291: #error "Define STARTFILE_SPEC in the appropriate tm.h file" ! 292: #endif ! 293: ! 294: #ifndef MACHINE_TYPE ! 295: #error "Define MACHINE_TYPE in the appropriate tm.h file" ! 296: #endif ! 297: #endif ! 298: ! 299: ! 300: /* Names to predefine in the preprocessor for this target machine. */ ! 301: ! 302: #ifndef CPP_PREDEFINES ! 303: #define CPP_PREDEFINES "-Dmips -Dunix -Dhost_mips -DMIPSEB -DR3000" ! 304: #endif ! 305: ! 306: /* Extra switches sometimes passed to the assembler. */ ! 307: ! 308: #ifndef ASM_SPEC ! 309: #define ASM_SPEC "\ ! 310: %{!mgas: \ ! 311: %{!mrnames: -nocpp} \ ! 312: %{pipe: %e-pipe is not supported.} \ ! 313: %{EB} %{!EB:-EB} \ ! 314: %{EL: %e-EL not supported} \ ! 315: %{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3} \ ! 316: %{g} %{g0} %{g1} %{g2} %{g3} %{v} %{K}} \ ! 317: %{G*}" ! 318: ! 319: #endif /* ASM_SPEC */ ! 320: ! 321: /* Specify to run a post-processor, mips-tfile after the assembler ! 322: has run to stuff the mips debug information into the object file. ! 323: This is needed because the $#!%^ MIPS assembler provides no way ! 324: of specifing such information in the assembly file. */ ! 325: ! 326: #ifndef ASM_FINAL_SPEC ! 327: #define ASM_FINAL_SPEC "\ ! 328: %{!mgas: %{!mno-mips-tfile: \ ! 329: \n mips-tfile %{v*: -v} \ ! 330: %{K: -I %b.o~} \ ! 331: %{!K: %{save-temps: -I %b.o~}} \ ! 332: %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %b.o} \ ! 333: %{.s:%i} %{!.s:%g.s}}}" ! 334: #endif ! 335: ! 336: /* Redefinition of libraries used. Mips doesn't support normal ! 337: UNIX style profiling via calling _mcount. It does offer ! 338: profiling that samples the PC, so do what we can... */ ! 339: ! 340: #ifndef LIB_SPEC ! 341: #define LIB_SPEC "%{pg:-lprof1} %{p:-lprof1} -lc" ! 342: #endif ! 343: ! 344: /* Extra switches sometimes passed to the linker. */ ! 345: ! 346: #ifndef LINK_SPEC ! 347: #define LINK_SPEC "\ ! 348: %{G*} \ ! 349: %{!mgas: \ ! 350: %{pipe: %e-pipe is not supported.} \ ! 351: %{EB} %{!EB:-EB} \ ! 352: %{EL: %e-EL not supported} \ ! 353: %{bestGnum}}" ! 354: #endif /* LINK_SPEC defined */ ! 355: ! 356: /* Specs for the compiler proper */ ! 357: ! 358: #ifndef CC1_SPEC ! 359: #define CC1_SPEC "\ ! 360: %{O*: %{!mno-gpOPT:%{!mno-gpopt: -mgpopt}}} \ ! 361: %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \ ! 362: %{G*} \ ! 363: %{pic-none: -mno-half-pic} \ ! 364: %{pic-lib: -mhalf-pic} \ ! 365: %{pic-extern: -mhalf-pic} \ ! 366: %{pic-calls: -mhalf-pic} \ ! 367: %{save-temps: }" ! 368: #endif ! 369: ! 370: #ifndef CC1PLUS_SPEC ! 371: #define CC1PLUS_SPEC "%{!fgnu-binutils: -fno-gnu-binutils}" ! 372: #endif ! 373: ! 374: /* Preprocessor specs */ ! 375: ! 376: #ifndef CPP_SPEC ! 377: #define CPP_SPEC "\ ! 378: %{!ansi:-DSYSTYPE_BSD} -D__SYSTYPE_BSD__ \ ! 379: %{.cc: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 380: %{.cxx: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 381: %{.C: -D__LANGUAGE_C_PLUS_PLUS -D_LANGUAGE_C_PLUS_PLUS} \ ! 382: %{.m: -D__LANGUAGE_OBJECTIVE_C -D_LANGUAGE_OBJECTIVE_C} \ ! 383: %{.S: -D__LANGUAGE_ASSEMBLY -D_LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \ ! 384: %{!.S: -D__LANGUAGE_C -D_LANGUAGE_C %{!ansi:-DLANGUAGE_C}}" ! 385: #endif ! 386: ! 387: /* If defined, this macro is an additional prefix to try after ! 388: `STANDARD_EXEC_PREFIX'. */ ! 389: ! 390: #ifndef MD_EXEC_PREFIX ! 391: #define MD_EXEC_PREFIX "/usr/lib/cmplrs/cc" ! 392: #endif ! 393: ! 394: ! 395: /* Print subsidiary information on the compiler version in use. */ ! 396: ! 397: #define MIPS_VERSION "[AL 1.1, MM 12]" ! 398: ! 399: #ifndef MACHINE_TYPE ! 400: #define MACHINE_TYPE "BSD Mips" ! 401: #endif ! 402: ! 403: #ifndef TARGET_VERSION_INTERNAL ! 404: #define TARGET_VERSION_INTERNAL(STREAM) \ ! 405: fprintf (STREAM, " %s %s", MIPS_VERSION, MACHINE_TYPE) ! 406: #endif ! 407: ! 408: #ifndef TARGET_VERSION ! 409: #define TARGET_VERSION TARGET_VERSION_INTERNAL (stderr) ! 410: #endif ! 411: ! 412: ! 413: #define SDB_DEBUGGING_INFO /* generate info for mips-tfile */ ! 414: #define DBX_DEBUGGING_INFO /* generate stabs (OSF/rose) */ ! 415: #define MIPS_DEBUGGING_INFO /* MIPS specific debugging info */ ! 416: ! 417: #ifndef PREFERRED_DEBUGGING_TYPE /* assume SDB_DEBUGGING_INFO */ ! 418: #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG ! 419: #endif ! 420: ! 421: /* If we are passing smuggling stabs through the MIPS ECOFF object ! 422: format, put a comment in front of the .stab<x> operation so ! 423: that the MIPS assembler does not choke. The mips-tfile program ! 424: will correctly put the stab into the object file. */ ! 425: ! 426: #define ASM_STABS_OP ((TARGET_GAS) ? ".stabs" : " #.stabs") ! 427: #define ASM_STABN_OP ((TARGET_GAS) ? ".stabn" : " #.stabn") ! 428: #define ASM_STABD_OP ((TARGET_GAS) ? ".stabd" : " #.stabd") ! 429: ! 430: /* Forward references to tags are allowed. */ ! 431: #define SDB_ALLOW_FORWARD_REFERENCES ! 432: ! 433: /* Unknown tags are also allowed. */ ! 434: #define SDB_ALLOW_UNKNOWN_REFERENCES ! 435: ! 436: /* On Sun 4, this limit is 2048. We use 1500 to be safe, ! 437: since the length can run past this up to a continuation point. */ ! 438: #define DBX_CONTIN_LENGTH 1500 ! 439: ! 440: ! 441: /* How to renumber registers for dbx and gdb. */ ! 442: #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[ (REGNO) ] ! 443: ! 444: ! 445: /* Overrides for the COFF debug format. */ ! 446: #define PUT_SDB_SCL(a) \ ! 447: do { \ ! 448: extern FILE *asm_out_text_file; \ ! 449: fprintf (asm_out_text_file, "\t.scl\t%d;", (a)); \ ! 450: } while (0) ! 451: ! 452: #define PUT_SDB_INT_VAL(a) \ ! 453: do { \ ! 454: extern FILE *asm_out_text_file; \ ! 455: fprintf (asm_out_text_file, "\t.val\t%d;", (a)); \ ! 456: } while (0) ! 457: ! 458: #define PUT_SDB_VAL(a) \ ! 459: do { \ ! 460: extern FILE *asm_out_text_file; \ ! 461: fputs ("\t.val\t", asm_out_text_file); \ ! 462: output_addr_const (asm_out_text_file, (a)); \ ! 463: fputc (';', asm_out_text_file); \ ! 464: } while (0) ! 465: ! 466: #define PUT_SDB_DEF(a) \ ! 467: do { \ ! 468: extern FILE *asm_out_text_file; \ ! 469: fprintf (asm_out_text_file, "\t#.def\t"); \ ! 470: ASM_OUTPUT_LABELREF (asm_out_text_file, a); \ ! 471: fputc (';', asm_out_text_file); \ ! 472: } while (0) ! 473: ! 474: #define PUT_SDB_PLAIN_DEF(a) \ ! 475: do { \ ! 476: extern FILE *asm_out_text_file; \ ! 477: fprintf (asm_out_text_file, "\t#.def\t.%s;", (a)); \ ! 478: } while (0) ! 479: ! 480: #define PUT_SDB_ENDEF \ ! 481: do { \ ! 482: extern FILE *asm_out_text_file; \ ! 483: fprintf (asm_out_text_file, "\t.endef\n"); \ ! 484: } while (0) ! 485: ! 486: #define PUT_SDB_TYPE(a) \ ! 487: do { \ ! 488: extern FILE *asm_out_text_file; \ ! 489: fprintf (asm_out_text_file, "\t.type\t0x%x;", (a)); \ ! 490: } while (0) ! 491: ! 492: #define PUT_SDB_SIZE(a) \ ! 493: do { \ ! 494: extern FILE *asm_out_text_file; \ ! 495: fprintf (asm_out_text_file, "\t.size\t%d;", (a)); \ ! 496: } while (0) ! 497: ! 498: #define PUT_SDB_DIM(a) \ ! 499: do { \ ! 500: extern FILE *asm_out_text_file; \ ! 501: fprintf (asm_out_text_file, "\t.dim\t%d;", (a)); \ ! 502: } while (0) ! 503: ! 504: #ifndef PUT_SDB_START_DIM ! 505: #define PUT_SDB_START_DIM \ ! 506: do { \ ! 507: extern FILE *asm_out_text_file; \ ! 508: fprintf (asm_out_text_file, "\t.dim\t"); \ ! 509: } while (0) ! 510: #endif ! 511: ! 512: #ifndef PUT_SDB_NEXT_DIM ! 513: #define PUT_SDB_NEXT_DIM(a) \ ! 514: do { \ ! 515: extern FILE *asm_out_text_file; \ ! 516: fprintf (asm_out_text_file, "%d,", a); \ ! 517: } while (0) ! 518: #endif ! 519: ! 520: #ifndef PUT_SDB_LAST_DIM ! 521: #define PUT_SDB_LAST_DIM(a) \ ! 522: do { \ ! 523: extern FILE *asm_out_text_file; \ ! 524: fprintf (asm_out_text_file, "%d;", a); \ ! 525: } while (0) ! 526: #endif ! 527: ! 528: #define PUT_SDB_TAG(a) \ ! 529: do { \ ! 530: extern FILE *asm_out_text_file; \ ! 531: fprintf (asm_out_text_file, "\t.tag\t"); \ ! 532: ASM_OUTPUT_LABELREF (asm_out_text_file, a); \ ! 533: fputc (';', asm_out_text_file); \ ! 534: } while (0) ! 535: ! 536: /* For block start and end, we create labels, so that ! 537: later we can figure out where the correct offset is. ! 538: The normal .ent/.end serve well enough for functions, ! 539: so those are just commented out. */ ! 540: ! 541: #define PUT_SDB_BLOCK_START(LINE) \ ! 542: do { \ ! 543: extern FILE *asm_out_text_file; \ ! 544: fprintf (asm_out_text_file, \ ! 545: "$Lb%d:\n\t#.begin\t$Lb%d\t%d\n", \ ! 546: sdb_label_count, \ ! 547: sdb_label_count, \ ! 548: (LINE)); \ ! 549: sdb_label_count++; \ ! 550: } while (0) ! 551: ! 552: #define PUT_SDB_BLOCK_END(LINE) \ ! 553: do { \ ! 554: extern FILE *asm_out_text_file; \ ! 555: fprintf (asm_out_text_file, \ ! 556: "$Le%d:\n\t#.bend\t$Le%d\t%d\n", \ ! 557: sdb_label_count, \ ! 558: sdb_label_count, \ ! 559: (LINE)); \ ! 560: sdb_label_count++; \ ! 561: } while (0) ! 562: ! 563: #define PUT_SDB_FUNCTION_START(LINE) ! 564: ! 565: #define PUT_SDB_FUNCTION_END(LINE) ! 566: ! 567: #define PUT_SDB_EPILOGUE_END(NAME) ! 568: ! 569: #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \ ! 570: sprintf ((BUFFER), ".%dfake", (NUMBER)); ! 571: ! 572: /* Correct the offset of automatic variables and arguments ! 573: if the frame pointer has been eliminated. */ ! 574: ! 575: #define DEBUGGER_AUTO_OFFSET(X) mips_debugger_offset (X, 0) ! 576: #define DEBUGGER_ARG_OFFSET(OFFSET, X) mips_debugger_offset (X, OFFSET) ! 577: ! 578: ! 579: /* Tell collect that the object format is ECOFF */ ! 580: #ifndef OBJECT_FORMAT_ROSE ! 581: #define OBJECT_FORMAT_COFF /* Object file looks like COFF */ ! 582: #define EXTENDED_COFF /* ECOFF, not normal coff */ ! 583: #endif ! 584: ! 585: ! 586: /* Run-time compilation parameters selecting different hardware subsets. */ ! 587: ! 588: /* Macros used in the machine description to test the flags. */ ! 589: ! 590: /* Bits for real switches */ ! 591: #define MASK_INT64 0x00000001 /* ints are 64 bits */ ! 592: #define MASK_LONG64 0x00000002 /* longs are 64 bits */ ! 593: #define MASK_LLONG128 0x00000004 /* long longs are 128 bits */ ! 594: #define MASK_GPOPT 0x00000008 /* Optimize for global pointer */ ! 595: #define MASK_GAS 0x00000010 /* Gas used instead of MIPS as */ ! 596: #define MASK_NAME_REGS 0x00000020 /* Use MIPS s/w reg name convention */ ! 597: #define MASK_STATS 0x00000040 /* print statistics to stderr */ ! 598: #define MASK_MEMCPY 0x00000080 /* call memcpy instead of inline code*/ ! 599: #define MASK_SOFT_FLOAT 0x00000100 /* software floating point */ ! 600: #define MASK_FLOAT64 0x00000200 /* fp registers are 64 bits */ ! 601: #define MASK_ABICALLS 0x00000400 /* emit .abicalls/.cprestore/.cpload */ ! 602: #define MASK_HALF_PIC 0x00000800 /* Emit OSF-style pic refs to externs*/ ! 603: #define MASK_UNUSED1 0x00001000 ! 604: #define MASK_UNUSED2 0x00002000 ! 605: #define MASK_UNUSED3 0x00004000 ! 606: #define MASK_UNUSED4 0x00008000 ! 607: #define MASK_UNUSED5 0x00010000 ! 608: #define MASK_UNUSED6 0x00020000 ! 609: #define MASK_UNUSED7 0x00040000 ! 610: #define MASK_UNUSED8 0x00080000 ! 611: ! 612: /* Dummy switches used only in spec's*/ ! 613: #define MASK_MIPS_TFILE 0x00000000 /* flag for mips-tfile usage */ ! 614: ! 615: /* switches not used yet */ ! 616: #define MASK_WC8 0x00000000 /* wchar's are 8 bits, not 32 */ ! 617: #define MASK_WC16 0x00000000 /* wchar's are 16 bits, not 32 */ ! 618: #define MASK_WC32 0x00000000 /* dummy for consistancy */ ! 619: ! 620: /* Debug switches, not documented */ ! 621: #define MASK_DEBUG 0x40000000 /* Eliminate version # in .s file */ ! 622: #define MASK_DEBUG_A 0x20000000 /* don't allow <label>($reg) addrs */ ! 623: #define MASK_DEBUG_B 0x10000000 /* GO_IF_LEGITIMATE_ADDRESS debug */ ! 624: #define MASK_DEBUG_C 0x08000000 /* suppress normal divmod patterns */ ! 625: #define MASK_DEBUG_D 0x04000000 /* make multiply cost 2 */ ! 626: #define MASK_DEBUG_E 0x02000000 /* function_arg debug */ ! 627: #define MASK_DEBUG_F 0x01000000 /* don't try to suppress load nop's */ ! 628: #define MASK_DEBUG_G 0x00800000 /* don't support 64 bit arithmetic */ ! 629: #define MASK_DEBUG_H 0x00400000 /* allow ints in FP registers */ ! 630: #define MASK_DEBUG_I 0x00200000 /* unused */ ! 631: #define MASK_DEBUG_J 0x00100000 /* unused */ ! 632: ! 633: /* r4000 64 bit sizes */ ! 634: #define TARGET_INT64 (target_flags & MASK_INT64) ! 635: #define TARGET_LONG64 (target_flags & MASK_LONG64) ! 636: #define TARGET_LLONG128 (target_flags & MASK_LLONG128) ! 637: #define TARGET_FLOAT64 (target_flags & MASK_FLOAT64) ! 638: ! 639: /* Mips vs. GNU assembler */ ! 640: #define TARGET_GAS (target_flags & MASK_GAS) ! 641: #define TARGET_UNIX_ASM (!TARGET_GAS) ! 642: #define TARGET_MIPS_AS TARGET_UNIX_ASM ! 643: ! 644: /* Debug Mode */ ! 645: #define TARGET_DEBUG_MODE (target_flags & MASK_DEBUG) ! 646: #define TARGET_DEBUG_A_MODE (target_flags & MASK_DEBUG_A) ! 647: #define TARGET_DEBUG_B_MODE (target_flags & MASK_DEBUG_B) ! 648: #define TARGET_DEBUG_C_MODE (target_flags & MASK_DEBUG_C) ! 649: #define TARGET_DEBUG_D_MODE (target_flags & MASK_DEBUG_D) ! 650: #define TARGET_DEBUG_E_MODE (target_flags & MASK_DEBUG_E) ! 651: #define TARGET_DEBUG_F_MODE (target_flags & MASK_DEBUG_F) ! 652: #define TARGET_DEBUG_G_MODE (target_flags & MASK_DEBUG_G) ! 653: #define TARGET_DEBUG_H_MODE (target_flags & MASK_DEBUG_H) ! 654: #define TARGET_DEBUG_I_MODE (target_flags & MASK_DEBUG_I) ! 655: #define TARGET_DEBUG_J_MODE (target_flags & MASK_DEBUG_J) ! 656: ! 657: /* Reg. Naming in .s ($21 vs. $a0) */ ! 658: #define TARGET_NAME_REGS (target_flags & MASK_NAME_REGS) ! 659: ! 660: /* Optimize for Sdata/Sbss */ ! 661: #define TARGET_GP_OPT (target_flags & MASK_GPOPT) ! 662: ! 663: /* print program statistics */ ! 664: #define TARGET_STATS (target_flags & MASK_STATS) ! 665: ! 666: /* call memcpy instead of inline code */ ! 667: #define TARGET_MEMCPY (target_flags & MASK_MEMCPY) ! 668: ! 669: /* .abicalls, etc from Pyramid V.4 */ ! 670: #define TARGET_ABICALLS (target_flags & MASK_ABICALLS) ! 671: ! 672: /* OSF pic references to externs */ ! 673: #define TARGET_HALF_PIC (target_flags & MASK_HALF_PIC) ! 674: ! 675: /* wchar size */ ! 676: #define TARGET_WC8 (target_flags & MASK_WC8) ! 677: #define TARGET_WC16 (target_flags & MASK_WC16) ! 678: #define TARGET_WC32 ((target_flags & (MASK_WC8 | MASK_WC16)) == 0) ! 679: ! 680: /* software floating point */ ! 681: #define TARGET_SOFT_FLOAT (target_flags & MASK_SOFT_FLOAT) ! 682: #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT) ! 683: ! 684: /* Macro to define tables used to set the flags. ! 685: This is a list in braces of pairs in braces, ! 686: each pair being { "NAME", VALUE } ! 687: where VALUE is the bits to set or minus the bits to clear. ! 688: An empty string NAME is used to identify the default VALUE. */ ! 689: ! 690: #define TARGET_SWITCHES \ ! 691: { \ ! 692: {"int64", MASK_INT64 | MASK_LONG64}, \ ! 693: {"long64", MASK_LONG64}, \ ! 694: {"longlong128", MASK_INT64 | MASK_LONG64 | MASK_LLONG128}, \ ! 695: {"mips-as", -MASK_GAS}, \ ! 696: {"gas", MASK_GAS}, \ ! 697: {"rnames", MASK_NAME_REGS}, \ ! 698: {"no-rnames", -MASK_NAME_REGS}, \ ! 699: {"gpOPT", MASK_GPOPT}, \ ! 700: {"gpopt", MASK_GPOPT}, \ ! 701: {"no-gpOPT", -MASK_GPOPT}, \ ! 702: {"no-gpopt", -MASK_GPOPT}, \ ! 703: {"stats", MASK_STATS}, \ ! 704: {"no-stats", -MASK_STATS}, \ ! 705: {"memcpy", MASK_MEMCPY}, \ ! 706: {"no-memcpy", -MASK_MEMCPY}, \ ! 707: {"wc8", MASK_WC8}, \ ! 708: {"wc16", MASK_WC16}, \ ! 709: {"wc32", MASK_WC32}, \ ! 710: {"mips-tfile", MASK_MIPS_TFILE}, \ ! 711: {"no-mips-tfile", -MASK_MIPS_TFILE}, \ ! 712: {"soft-float", MASK_SOFT_FLOAT}, \ ! 713: {"hard-float", -MASK_SOFT_FLOAT}, \ ! 714: {"fp64", MASK_FLOAT64}, \ ! 715: {"fp32", -MASK_FLOAT64}, \ ! 716: {"abicalls", MASK_ABICALLS}, \ ! 717: {"no-abicalls", -MASK_ABICALLS}, \ ! 718: {"half-pic", MASK_HALF_PIC}, \ ! 719: {"no-half-pic", -MASK_HALF_PIC}, \ ! 720: {"debug", MASK_DEBUG}, \ ! 721: {"debuga", MASK_DEBUG_A}, \ ! 722: {"debugb", MASK_DEBUG_B}, \ ! 723: {"debugc", MASK_DEBUG_C}, \ ! 724: {"debugd", MASK_DEBUG_D}, \ ! 725: {"debuge", MASK_DEBUG_E}, \ ! 726: {"debugf", MASK_DEBUG_F}, \ ! 727: {"debugg", MASK_DEBUG_G}, \ ! 728: {"debugh", MASK_DEBUG_H}, \ ! 729: {"debugi", MASK_DEBUG_I}, \ ! 730: {"debugj", MASK_DEBUG_J}, \ ! 731: {"", TARGET_DEFAULT} \ ! 732: } ! 733: ! 734: /* Default target_flags if no switches are specified */ ! 735: ! 736: #ifndef TARGET_DEFAULT ! 737: #define TARGET_DEFAULT 0 ! 738: #endif ! 739: ! 740: /* This macro is similar to `TARGET_SWITCHES' but defines names of ! 741: command options that have values. Its definition is an ! 742: initializer with a subgrouping for each command option. ! 743: ! 744: Each subgrouping contains a string constant, that defines the ! 745: fixed part of the option name, and the address of a variable. ! 746: The variable, type `char *', is set to the variable part of the ! 747: given option if the fixed part matches. The actual option name ! 748: is made by appending `-m' to the specified name. ! 749: ! 750: Here is an example which defines `-mshort-data-NUMBER'. If the ! 751: given option is `-mshort-data-512', the variable `m88k_short_data' ! 752: will be set to the string `"512"'. ! 753: ! 754: extern char *m88k_short_data; ! 755: #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */ ! 756: ! 757: #define TARGET_OPTIONS \ ! 758: { \ ! 759: { "cpu=", &mips_cpu_string }, \ ! 760: { "ips", &mips_isa_string } \ ! 761: } ! 762: ! 763: /* Macros to decide whether certain features are available or not, ! 764: depending on the instruction set architecture level. */ ! 765: ! 766: #define BRANCH_LIKELY_P() (mips_isa >= 2) ! 767: #define HAVE_64BIT_P() (mips_isa >= 3) ! 768: #define HAVE_SQRT_P() (mips_isa >= 2) ! 769: ! 770: ! 771: /* Target machine storage layout */ ! 772: ! 773: /* Define this if most significant bit is lowest numbered ! 774: in instructions that operate on numbered bit-fields. ! 775: */ ! 776: /* #define BITS_BIG_ENDIAN */ ! 777: ! 778: /* Define this if most significant byte of a word is the lowest numbered. */ ! 779: #ifndef BYTES_BIG_ENDIAN ! 780: #ifndef DECSTATION ! 781: #define BYTES_BIG_ENDIAN 1 ! 782: #else ! 783: #define BYTES_BIG_ENDIAN 0 ! 784: #endif ! 785: #endif ! 786: ! 787: /* Define this if most significant word of a multiword number is the lowest. */ ! 788: #ifndef WORDS_BIG_ENDIAN ! 789: #ifndef DECSTATION ! 790: #define WORDS_BIG_ENDIAN 1 ! 791: #else ! 792: #define WORDS_BIG_ENDIAN 0 ! 793: #endif ! 794: #endif ! 795: ! 796: /* Define macros to easily access the most and least significant words ! 797: without a lot of #ifdef's. */ ! 798: ! 799: #if WORDS_BIG_ENDIAN ! 800: #define MOST_SIGNIFICANT_WORD 0 ! 801: #define LEAST_SIGNIFICANT_WORD 1 ! 802: ! 803: #else ! 804: #define MOST_SIGNIFICANT_WORD 1 ! 805: #define LEAST_SIGNIFICANT_WORD 0 ! 806: #endif ! 807: ! 808: /* Number of bits in an addressible storage unit */ ! 809: #define BITS_PER_UNIT 8 ! 810: ! 811: /* Width in bits of a "word", which is the contents of a machine register. ! 812: Note that this is not necessarily the width of data type `int'; ! 813: if using 16-bit ints on a 68000, this would still be 32. ! 814: But on a machine with 16-bit registers, this would be 16. */ ! 815: #define BITS_PER_WORD 32 ! 816: ! 817: /* Width of a word, in units (bytes). */ ! 818: #define UNITS_PER_WORD 4 ! 819: ! 820: /* A C expression for the size in bits of the type `int' on the ! 821: target machine. If you don't define this, the default is one ! 822: word. */ ! 823: #define INT_TYPE_SIZE 32 ! 824: ! 825: /* A C expression for the size in bits of the type `short' on the ! 826: target machine. If you don't define this, the default is half a ! 827: word. (If this would be less than one storage unit, it is ! 828: rounded up to one unit.) */ ! 829: #define SHORT_TYPE_SIZE 16 ! 830: ! 831: /* A C expression for the size in bits of the type `long' on the ! 832: target machine. If you don't define this, the default is one ! 833: word. */ ! 834: #define LONG_TYPE_SIZE 32 ! 835: ! 836: /* A C expression for the size in bits of the type `long long' on the ! 837: target machine. If you don't define this, the default is two ! 838: words. */ ! 839: #define LONG_LONG_TYPE_SIZE 64 ! 840: ! 841: /* A C expression for the size in bits of the type `char' on the ! 842: target machine. If you don't define this, the default is one ! 843: quarter of a word. (If this would be less than one storage unit, ! 844: it is rounded up to one unit.) */ ! 845: #define CHAR_TYPE_SIZE BITS_PER_UNIT ! 846: ! 847: /* A C expression for the size in bits of the type `float' on the ! 848: target machine. If you don't define this, the default is one ! 849: word. */ ! 850: #define FLOAT_TYPE_SIZE 32 ! 851: ! 852: /* A C expression for the size in bits of the type `double' on the ! 853: target machine. If you don't define this, the default is two ! 854: words. */ ! 855: #define DOUBLE_TYPE_SIZE 64 ! 856: ! 857: /* A C expression for the size in bits of the type `long double' on ! 858: the target machine. If you don't define this, the default is two ! 859: words. */ ! 860: #define LONG_DOUBLE_TYPE_SIZE 64 ! 861: ! 862: /* Width in bits of a pointer. ! 863: See also the macro `Pmode' defined below. */ ! 864: #define POINTER_SIZE 32 ! 865: ! 866: /* Allocation boundary (in *bits*) for storing pointers in memory. */ ! 867: #define POINTER_BOUNDARY 32 ! 868: ! 869: /* Allocation boundary (in *bits*) for storing arguments in argument list. */ ! 870: #define PARM_BOUNDARY 32 ! 871: ! 872: /* Allocation boundary (in *bits*) for the code of a function. */ ! 873: #define FUNCTION_BOUNDARY 32 ! 874: ! 875: /* Alignment of field after `int : 0' in a structure. */ ! 876: #define EMPTY_FIELD_BOUNDARY 32 ! 877: ! 878: /* Every structure's size must be a multiple of this. */ ! 879: /* 8 is observed right on a DECstation and on riscos 4.02. */ ! 880: #define STRUCTURE_SIZE_BOUNDARY 8 ! 881: ! 882: /* There is no point aligning anything to a rounder boundary than this. */ ! 883: #define BIGGEST_ALIGNMENT 64 ! 884: ! 885: /* Biggest alignment any structure field can require in bits. */ ! 886: #define BIGGEST_FIELD_ALIGNMENT 64 ! 887: ! 888: /* Define this if move instructions will actually fail to work ! 889: when given unaligned data. */ ! 890: #define STRICT_ALIGNMENT ! 891: ! 892: /* Define this if you wish to imitate the way many other C compilers ! 893: handle alignment of bitfields and the structures that contain ! 894: them. ! 895: ! 896: The behavior is that the type written for a bitfield (`int', ! 897: `short', or other integer type) imposes an alignment for the ! 898: entire structure, as if the structure really did contain an ! 899: ordinary field of that type. In addition, the bitfield is placed ! 900: within the structure so that it would fit within such a field, ! 901: not crossing a boundary for it. ! 902: ! 903: Thus, on most machines, a bitfield whose type is written as `int' ! 904: would not cross a four-byte boundary, and would force four-byte ! 905: alignment for the whole structure. (The alignment used may not ! 906: be four bytes; it is controlled by the other alignment ! 907: parameters.) ! 908: ! 909: If the macro is defined, its definition should be a C expression; ! 910: a nonzero value for the expression enables this behavior. */ ! 911: ! 912: #define PCC_BITFIELD_TYPE_MATTERS 1 ! 913: ! 914: /* If defined, a C expression to compute the alignment given to a ! 915: constant that is being placed in memory. CONSTANT is the constant ! 916: and ALIGN is the alignment that the object would ordinarily have. ! 917: The value of this macro is used instead of that alignment to align ! 918: the object. ! 919: ! 920: If this macro is not defined, then ALIGN is used. ! 921: ! 922: The typical use of this macro is to increase alignment for string ! 923: constants to be word aligned so that `strcpy' calls that copy ! 924: constants can be done inline. */ ! 925: ! 926: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ ! 927: ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \ ! 928: && (ALIGN) < BITS_PER_WORD \ ! 929: ? BITS_PER_WORD \ ! 930: : (ALIGN)) ! 931: ! 932: /* If defined, a C expression to compute the alignment for a static ! 933: variable. TYPE is the data type, and ALIGN is the alignment that ! 934: the object would ordinarily have. The value of this macro is used ! 935: instead of that alignment to align the object. ! 936: ! 937: If this macro is not defined, then ALIGN is used. ! 938: ! 939: One use of this macro is to increase alignment of medium-size ! 940: data to make it all fit in fewer cache lines. Another is to ! 941: cause character arrays to be word-aligned so that `strcpy' calls ! 942: that copy constants to character arrays can be done inline. */ ! 943: ! 944: #undef DATA_ALIGNMENT ! 945: #define DATA_ALIGNMENT(TYPE, ALIGN) \ ! 946: ((((ALIGN) < BITS_PER_WORD) \ ! 947: && (TREE_CODE (TYPE) == ARRAY_TYPE \ ! 948: || TREE_CODE (TYPE) == UNION_TYPE \ ! 949: || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) ! 950: ! 951: /* Define this macro if an argument declared as `char' or `short' in a ! 952: prototype should actually be passed as an `int'. In addition to ! 953: avoiding errors in certain cases of mismatch, it also makes for ! 954: better code on certain machines. */ ! 955: ! 956: #define PROMOTE_PROTOTYPES ! 957: ! 958: /* Define this macro if an instruction to load a value narrower ! 959: than a word from memory into a register also zero-extends the ! 960: value to the whole register. */ ! 961: ! 962: #define BYTE_LOADS_ZERO_EXTEND ! 963: ! 964: ! 965: /* Standard register usage. */ ! 966: ! 967: /* Number of actual hardware registers. ! 968: The hardware registers are assigned numbers for the compiler ! 969: from 0 to just below FIRST_PSEUDO_REGISTER. ! 970: All registers that the compiler knows about must be given numbers, ! 971: even those that are not normally considered general registers. ! 972: ! 973: On the Mips, we have 32 integer registers, 32 floating point registers ! 974: and the special registers hi, lo, and fp status. */ ! 975: ! 976: #define FIRST_PSEUDO_REGISTER 67 ! 977: ! 978: /* 1 for registers that have pervasive standard uses ! 979: and are not available for the register allocator. ! 980: ! 981: On the MIPS, see conventions, page D-2 */ ! 982: ! 983: #define FIXED_REGISTERS \ ! 984: { \ ! 985: 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 986: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, \ ! 987: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 988: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 989: 1, 1, 1 \ ! 990: } ! 991: ! 992: ! 993: /* 1 for registers not available across function calls. ! 994: These must include the FIXED_REGISTERS and also any ! 995: registers that can be used without being saved. ! 996: The latter must include the registers where values are returned ! 997: and the register where structure-value addresses are passed. ! 998: Aside from that, you can include as many other registers as you like. */ ! 999: ! 1000: #define CALL_USED_REGISTERS \ ! 1001: { \ ! 1002: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ ! 1003: 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 1, \ ! 1004: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ ! 1005: 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ ! 1006: 1, 1, 1 \ ! 1007: } ! 1008: ! 1009: ! 1010: /* Internal macros to classify a register number as to whether it's a ! 1011: general purpose register, a floating point register, a ! 1012: multiply/divide register, or a status register. ! 1013: ! 1014: The macro FP_CALL_REG_P also allows registers $4 and $6 as floating ! 1015: point registers to pass floating point as per MIPS spec. */ ! 1016: ! 1017: #define GP_REG_FIRST 0 ! 1018: #define GP_REG_LAST 31 ! 1019: #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1) ! 1020: #define GP_DBX_FIRST 0 ! 1021: ! 1022: #define FP_REG_FIRST 32 ! 1023: #define FP_REG_LAST 63 ! 1024: #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1) ! 1025: #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32) ! 1026: ! 1027: #define MD_REG_FIRST 64 ! 1028: #define MD_REG_LAST 65 ! 1029: #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1) ! 1030: ! 1031: #define ST_REG_FIRST 66 ! 1032: #define ST_REG_LAST 66 ! 1033: #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1) ! 1034: ! 1035: #define AT_REGNUM (GP_REG_FIRST + 1) ! 1036: #define HI_REGNUM (MD_REG_FIRST + 0) ! 1037: #define LO_REGNUM (MD_REG_FIRST + 1) ! 1038: #define FPSW_REGNUM ST_REG_FIRST ! 1039: ! 1040: #define GP_REG_P(REGNO) ((unsigned) ((REGNO) - GP_REG_FIRST) < GP_REG_NUM) ! 1041: #define FP_REG_P(REGNO) ((unsigned) ((REGNO) - FP_REG_FIRST) < FP_REG_NUM) ! 1042: #define MD_REG_P(REGNO) ((unsigned) ((REGNO) - MD_REG_FIRST) < MD_REG_NUM) ! 1043: #define ST_REG_P(REGNO) ((REGNO) == ST_REG_FIRST) ! 1044: ! 1045: #define FP_CALL_REG_P(REGNO) \ ! 1046: (FP_REG_P (REGNO) \ ! 1047: || (REGNO) == (4 + GP_REG_FIRST) \ ! 1048: || (REGNO) == (6 + GP_REG_FIRST)) ! 1049: ! 1050: /* Return number of consecutive hard regs needed starting at reg REGNO ! 1051: to hold something of mode MODE. ! 1052: This is ordinarily the length in words of a value of mode MODE ! 1053: but can be less for certain modes in special long registers. ! 1054: ! 1055: On the MIPS, all general registers are one word long. Except on ! 1056: the R4000 with the FR bit set, the floating point uses register ! 1057: pairs, with the second register not being allocatable. */ ! 1058: ! 1059: #define HARD_REGNO_NREGS(REGNO, MODE) \ ! 1060: (! FP_REG_P (REGNO) \ ! 1061: ? ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) \ ! 1062: : (((GET_MODE_SIZE (MODE) + (2*UNITS_PER_WORD) - 1) / (2*UNITS_PER_WORD)) \ ! 1063: << (TARGET_FLOAT64 == 0))) ! 1064: ! 1065: /* Value is 1 if hard register REGNO can hold a value of machine-mode ! 1066: MODE. Require that DImode and DFmode be in even registers. For ! 1067: DImode, this makes some of the insns easier to write, since you ! 1068: don't have to worry about a DImode value in registers 3 & 4, ! 1069: producing a result in 4 & 5. ! 1070: ! 1071: To make the code simpler HARD_REGNO_MODE_OK now just references an ! 1072: array built in override_options. Because machmodes.h is not yet ! 1073: included before this file is processed, the MODE bound can't be ! 1074: expressed here. */ ! 1075: ! 1076: extern char mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER]; ! 1077: ! 1078: #define HARD_REGNO_MODE_OK(REGNO, MODE) \ ! 1079: mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ] ! 1080: ! 1081: /* Value is 1 if it is a good idea to tie two pseudo registers ! 1082: when one has mode MODE1 and one has mode MODE2. ! 1083: If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, ! 1084: for any hard reg, then this must be 0 for correct output. */ ! 1085: #define MODES_TIEABLE_P(MODE1, MODE2) \ ! 1086: ((GET_MODE_CLASS (MODE1) == MODE_FLOAT || \ ! 1087: GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT) \ ! 1088: == (GET_MODE_CLASS (MODE2) == MODE_FLOAT || \ ! 1089: GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT)) ! 1090: ! 1091: /* MIPS pc is not overloaded on a register. */ ! 1092: /* #define PC_REGNUM xx */ ! 1093: ! 1094: /* Register to use for pushing function arguments. */ ! 1095: #define STACK_POINTER_REGNUM 29 ! 1096: ! 1097: /* Offset from the stack pointer to the first available location. */ ! 1098: #define STACK_POINTER_OFFSET 0 ! 1099: ! 1100: /* Base register for access to local variables of the function. */ ! 1101: #define FRAME_POINTER_REGNUM 30 ! 1102: ! 1103: /* Value should be nonzero if functions must have frame pointers. ! 1104: Zero means the frame pointer need not be set up (and parms ! 1105: may be accessed via the stack pointer) in functions that seem suitable. ! 1106: This is computed in `reload', in reload1.c. */ ! 1107: #define FRAME_POINTER_REQUIRED (current_function_calls_alloca) ! 1108: ! 1109: /* Base register for access to arguments of the function. */ ! 1110: #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM ! 1111: ! 1112: /* Register in which static-chain is passed to a function. */ ! 1113: #define STATIC_CHAIN_REGNUM 2 ! 1114: ! 1115: /* Register in which address to store a structure value ! 1116: is passed to a function. */ ! 1117: #define STRUCT_VALUE_REGNUM 4 ! 1118: ! 1119: /* Mips registers used in prologue/epilogue code when the stack frame ! 1120: is larger than 32K bytes. These registers must come from the ! 1121: scratch register set, and not used for passing and returning ! 1122: arguments and any other information used in the calling sequence ! 1123: (such as pic). */ ! 1124: #define MIPS_TEMP1_REGNUM 8 ! 1125: #define MIPS_TEMP2_REGNUM 9 ! 1126: ! 1127: /* Define this macro if it is as good or better to call a constant ! 1128: function address than to call an address kept in a register. */ ! 1129: #define NO_FUNCTION_CSE 1 ! 1130: ! 1131: /* Define this macro if it is as good or better for a function to ! 1132: call itself with an explicit address than to call an address ! 1133: kept in a register. */ ! 1134: #define NO_RECURSIVE_FUNCTION_CSE 1 ! 1135: ! 1136: /* The register number of the register used to address a table of ! 1137: static data addresses in memory. In some cases this register is ! 1138: defined by a processor's "application binary interface" (ABI). ! 1139: When this macro is defined, RTL is generated for this register ! 1140: once, as with the stack pointer and frame pointer registers. If ! 1141: this macro is not defined, it is up to the machine-dependent ! 1142: files to allocate such a register (if necessary). */ ! 1143: #define PIC_OFFSET_TABLE_REGNUM 28 ! 1144: ! 1145: ! 1146: /* Define the classes of registers for register constraints in the ! 1147: machine description. Also define ranges of constants. ! 1148: ! 1149: One of the classes must always be named ALL_REGS and include all hard regs. ! 1150: If there is more than one class, another class must be named NO_REGS ! 1151: and contain no registers. ! 1152: ! 1153: The name GENERAL_REGS must be the name of a class (or an alias for ! 1154: another name such as ALL_REGS). This is the class of registers ! 1155: that is allowed by "g" or "r" in a register constraint. ! 1156: Also, registers outside this class are allocated only when ! 1157: instructions express preferences for them. ! 1158: ! 1159: The classes must be numbered in nondecreasing order; that is, ! 1160: a larger-numbered class must never be contained completely ! 1161: in a smaller-numbered class. ! 1162: ! 1163: For any two classes, it is very desirable that there be another ! 1164: class that represents their union. */ ! 1165: ! 1166: enum reg_class ! 1167: { ! 1168: NO_REGS, /* no registers in set */ ! 1169: GR_REGS, /* integer registers */ ! 1170: FP_REGS, /* floating point registers */ ! 1171: HI_REG, /* hi register */ ! 1172: LO_REG, /* lo register */ ! 1173: MD_REGS, /* multiply/divide registers (hi/lo) */ ! 1174: ST_REGS, /* status registers (fp status) */ ! 1175: ALL_REGS, /* all registers */ ! 1176: LIM_REG_CLASSES /* max value + 1 */ ! 1177: }; ! 1178: ! 1179: #define N_REG_CLASSES (int) LIM_REG_CLASSES ! 1180: ! 1181: #define GENERAL_REGS GR_REGS ! 1182: ! 1183: /* An initializer containing the names of the register classes as C ! 1184: string constants. These names are used in writing some of the ! 1185: debugging dumps. */ ! 1186: ! 1187: #define REG_CLASS_NAMES \ ! 1188: { \ ! 1189: "NO_REGS", \ ! 1190: "GR_REGS", \ ! 1191: "FP_REGS", \ ! 1192: "HI_REG", \ ! 1193: "LO_REG", \ ! 1194: "MD_REGS", \ ! 1195: "ST_REGS", \ ! 1196: "ALL_REGS" \ ! 1197: } ! 1198: ! 1199: /* An initializer containing the contents of the register classes, ! 1200: as integers which are bit masks. The Nth integer specifies the ! 1201: contents of class N. The way the integer MASK is interpreted is ! 1202: that register R is in the class if `MASK & (1 << R)' is 1. ! 1203: ! 1204: When the machine has more than 32 registers, an integer does not ! 1205: suffice. Then the integers are replaced by sub-initializers, ! 1206: braced groupings containing several integers. Each ! 1207: sub-initializer must be suitable as an initializer for the type ! 1208: `HARD_REG_SET' which is defined in `hard-reg-set.h'. */ ! 1209: ! 1210: #define REG_CLASS_CONTENTS \ ! 1211: { \ ! 1212: { 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \ ! 1213: { 0xffffffff, 0x00000000, 0x00000000 }, /* integer registers */ \ ! 1214: { 0x00000000, 0xffffffff, 0x00000000 }, /* floating registers*/ \ ! 1215: { 0x00000000, 0x00000000, 0x00000001 }, /* lo register */ \ ! 1216: { 0x00000000, 0x00000000, 0x00000002 }, /* hi register */ \ ! 1217: { 0x00000000, 0x00000000, 0x00000003 }, /* mul/div registers */ \ ! 1218: { 0x00000000, 0x00000000, 0x00000004 }, /* status registers */ \ ! 1219: { 0xffffffff, 0xffffffff, 0x00000007 } /* all registers */ \ ! 1220: } ! 1221: ! 1222: ! 1223: /* A C expression whose value is a register class containing hard ! 1224: register REGNO. In general there is more that one such class; ! 1225: choose a class which is "minimal", meaning that no smaller class ! 1226: also contains the register. */ ! 1227: ! 1228: extern enum reg_class mips_regno_to_class[]; ! 1229: ! 1230: #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ] ! 1231: ! 1232: /* A macro whose definition is the name of the class to which a ! 1233: valid base register must belong. A base register is one used in ! 1234: an address which is the register value plus a displacement. */ ! 1235: ! 1236: #define BASE_REG_CLASS GR_REGS ! 1237: ! 1238: /* A macro whose definition is the name of the class to which a ! 1239: valid index register must belong. An index register is one used ! 1240: in an address where its value is either multiplied by a scale ! 1241: factor or added to another register (as well as added to a ! 1242: displacement). */ ! 1243: ! 1244: #define INDEX_REG_CLASS GR_REGS ! 1245: ! 1246: ! 1247: /* REGISTER AND CONSTANT CLASSES */ ! 1248: ! 1249: /* Get reg_class from a letter such as appears in the machine ! 1250: description. ! 1251: ! 1252: DEFINED REGISTER CLASSES: ! 1253: ! 1254: 'd' General (aka integer) registers ! 1255: 'f' Floating point registers ! 1256: 'h' Hi register ! 1257: 'l' Lo register ! 1258: 's' Status registers ! 1259: 'x' Multiply/divide registers */ ! 1260: ! 1261: extern enum reg_class mips_char_to_class[]; ! 1262: ! 1263: #define REG_CLASS_FROM_LETTER(C) mips_char_to_class[ (C) ] ! 1264: ! 1265: /* The letters I, J, K, L, M, N, O, and P in a register constraint ! 1266: string can be used to stand for particular ranges of immediate ! 1267: operands. This macro defines what the ranges are. C is the ! 1268: letter, and VALUE is a constant value. Return 1 if VALUE is ! 1269: in the range specified by C. */ ! 1270: ! 1271: /* For MIPS: ! 1272: ! 1273: `I' is used for the range of constants an arithmetic insn can ! 1274: actually contain (16 bits signed integers). ! 1275: ! 1276: `J' is used for the range which is just zero (ie, $r0). ! 1277: ! 1278: `K' is used for the range of constants a logical insn can actually ! 1279: contain (16 bit zero-extended integers). ! 1280: ! 1281: `L' is used for the range of constants that be loaded with lui ! 1282: (ie, the bottom 16 bits are zero). ! 1283: ! 1284: `M' is used for the range of constants that take two words to load ! 1285: (ie, not matched by `I', `K', and `L'). ! 1286: ! 1287: `N' is used for negative 16 bit constants. ! 1288: ! 1289: `O' is an exact power of 2 (not yet used in the md file). ! 1290: ! 1291: `P' is used for positive 16 bit constants. */ ! 1292: ! 1293: #define SMALL_INT(X) ((unsigned) (INTVAL (X) + 0x8000) < 0x10000) ! 1294: #define SMALL_INT_UNSIGNED(X) ((unsigned) (INTVAL (X)) < 0x10000) ! 1295: ! 1296: #define CONST_OK_FOR_LETTER_P(VALUE, C) \ ! 1297: ((C) == 'I' ? ((unsigned) ((VALUE) + 0x8000) < 0x10000) \ ! 1298: : (C) == 'J' ? ((VALUE) == 0) \ ! 1299: : (C) == 'K' ? ((unsigned) (VALUE) < 0x10000) \ ! 1300: : (C) == 'L' ? (((VALUE) & 0xffff0000) == (VALUE)) \ ! 1301: : (C) == 'M' ? ((((VALUE) & 0xffff0000) != 0) \ ! 1302: && (((VALUE) & 0xffff0000) != 0xffff0000) \ ! 1303: && ((VALUE) & 0x0000ffff) != 0) \ ! 1304: : (C) == 'N' ? (((VALUE) & 0xffff0000) == 0xffff0000) \ ! 1305: : (C) == 'O' ? (exact_log2 (VALUE) >= 0) \ ! 1306: : (C) == 'P' ? ((VALUE) != 0 && (((VALUE) & 0xffff0000) == 0)) \ ! 1307: : 0) ! 1308: ! 1309: /* Similar, but for floating constants, and defining letters G and H. ! 1310: Here VALUE is the CONST_DOUBLE rtx itself. */ ! 1311: ! 1312: /* For Mips ! 1313: ! 1314: 'G' : Floating point 0 */ ! 1315: ! 1316: #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ ! 1317: ((C) == 'G' \ ! 1318: && CONST_DOUBLE_HIGH (VALUE) == 0 \ ! 1319: && CONST_DOUBLE_LOW (VALUE) == 0) ! 1320: ! 1321: /* Letters in the range `Q' through `U' may be defined in a ! 1322: machine-dependent fashion to stand for arbitrary operand types. ! 1323: The machine description macro `EXTRA_CONSTRAINT' is passed the ! 1324: operand as its first argument and the constraint letter as its ! 1325: second operand. ! 1326: ! 1327: `Q' is for memory refereces using take more than 1 instruction. ! 1328: `R' is for memory refereces which take 1 word for the instruction. ! 1329: `S' is for references to extern items which are PIC for OSF/rose. */ ! 1330: ! 1331: #define EXTRA_CONSTRAINT(OP,CODE) \ ! 1332: ((GET_CODE (OP) != MEM) ? FALSE \ ! 1333: : ((CODE) == 'Q') ? !simple_memory_operand (OP, GET_MODE (OP)) \ ! 1334: : ((CODE) == 'R') ? simple_memory_operand (OP, GET_MODE (OP)) \ ! 1335: : ((CODE) == 'S') ? (HALF_PIC_P () && CONSTANT_P (OP) \ ! 1336: && HALF_PIC_ADDRESS_P (OP)) \ ! 1337: : FALSE) ! 1338: ! 1339: /* Given an rtx X being reloaded into a reg required to be ! 1340: in class CLASS, return the class of reg to actually use. ! 1341: In general this is just CLASS; but on some machines ! 1342: in some cases it is preferable to use a more restrictive class. */ ! 1343: ! 1344: #define PREFERRED_RELOAD_CLASS(X,CLASS) \ ! 1345: ((GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ ! 1346: || GET_MODE_CLASS (GET_MODE (X)) == MODE_COMPLEX_FLOAT) \ ! 1347: ? (TARGET_SOFT_FLOAT ? GR_REGS : FP_REGS) \ ! 1348: : ((GET_MODE (X) == VOIDmode) \ ! 1349: ? GR_REGS \ ! 1350: : CLASS)) ! 1351: ! 1352: /* Return the maximum number of consecutive registers ! 1353: needed to represent mode MODE in a register of class CLASS. */ ! 1354: ! 1355: #define CLASS_MAX_NREGS(CLASS, MODE) \ ! 1356: ((((MODE) == DFmode) || ((MODE) == SFmode)) ? 2 \ ! 1357: : ((MODE) == VOIDmode)? ((CLASS) == FP_REGS ? 2 : 1) \ ! 1358: : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) ! 1359: ! 1360: /* If defined, this is a C expression whose value should be ! 1361: nonzero if the insn INSN has the effect of mysteriously ! 1362: clobbering the contents of hard register number REGNO. By ! 1363: "mysterious" we mean that the insn's RTL expression doesn't ! 1364: describe such an effect. ! 1365: ! 1366: If this macro is not defined, it means that no insn clobbers ! 1367: registers mysteriously. This is the usual situation; all else ! 1368: being equal, it is best for the RTL expression to show all the ! 1369: activity. */ ! 1370: ! 1371: /* #define INSN_CLOBBERS_REGNO_P(INSN, REGNO) */ ! 1372: ! 1373: ! 1374: /* Stack layout; function entry, exit and calling. */ ! 1375: ! 1376: /* Define this if pushing a word on the stack ! 1377: makes the stack pointer a smaller address. */ ! 1378: #define STACK_GROWS_DOWNWARD ! 1379: ! 1380: /* Define this if the nominal address of the stack frame ! 1381: is at the high-address end of the local variables; ! 1382: that is, each additional local variable allocated ! 1383: goes at a more negative offset in the frame. */ ! 1384: #define FRAME_GROWS_DOWNWARD ! 1385: ! 1386: /* Offset within stack frame to start allocating local variables at. ! 1387: If FRAME_GROWS_DOWNWARD, this is the offset to the END of the ! 1388: first local allocated. Otherwise, it is the offset to the BEGINNING ! 1389: of the first local allocated. */ ! 1390: #define STARTING_FRAME_OFFSET (-8) ! 1391: ! 1392: /* Structure to be filled in by compute_frame_size with register ! 1393: save masks, and offsets for the current function. */ ! 1394: ! 1395: struct mips_frame_info ! 1396: { ! 1397: unsigned long total_size; /* # bytes that the entire frame takes up */ ! 1398: unsigned long var_size; /* # bytes that variables take up */ ! 1399: unsigned long args_size; /* # bytes that outgoing arguments take up */ ! 1400: unsigned long extra_size; /* # bytes of extra gunk */ ! 1401: unsigned int gp_reg_size; /* # bytes needed to store gp regs */ ! 1402: unsigned int fp_reg_size; /* # bytes needed to store fp regs */ ! 1403: unsigned long mask; /* mask of saved gp registers */ ! 1404: unsigned long fmask; /* mask of saved fp registers */ ! 1405: long gp_save_offset; /* offset from vfp to store gp registers */ ! 1406: long fp_save_offset; /* offset from vfp to store fp registers */ ! 1407: unsigned long gp_sp_offset; /* offset from new sp to store gp registers */ ! 1408: unsigned long fp_sp_offset; /* offset from new sp to store fp registers */ ! 1409: int initialized; /* != 0 if frame size already calculated */ ! 1410: }; ! 1411: ! 1412: extern struct mips_frame_info current_frame_info; ! 1413: ! 1414: /* Store in the variable DEPTH the initial difference between the ! 1415: frame pointer reg contents and the stack pointer reg contents, ! 1416: as of the start of the function body. This depends on the layout ! 1417: of the fixed parts of the stack frame and on how registers are saved. */ ! 1418: ! 1419: #define INITIAL_FRAME_POINTER_OFFSET(VAR) \ ! 1420: ((VAR) = compute_frame_size (get_frame_size ())) ! 1421: ! 1422: /* If we generate an insn to push BYTES bytes, ! 1423: this says how many the stack pointer really advances by. ! 1424: On the vax, sp@- in a byte insn really pushes a word. */ ! 1425: ! 1426: /* #define PUSH_ROUNDING(BYTES) 0 */ ! 1427: ! 1428: /* If defined, the maximum amount of space required for outgoing ! 1429: arguments will be computed and placed into the variable ! 1430: `current_function_outgoing_args_size'. No space will be pushed ! 1431: onto the stack for each call; instead, the function prologue ! 1432: should increase the stack frame size by this amount. ! 1433: ! 1434: It is not proper to define both `PUSH_ROUNDING' and ! 1435: `ACCUMULATE_OUTGOING_ARGS'. */ ! 1436: #define ACCUMULATE_OUTGOING_ARGS ! 1437: ! 1438: /* Offset of first parameter from the argument pointer register value. */ ! 1439: #define FIRST_PARM_OFFSET(FNDECL) 0 ! 1440: ! 1441: /* Offset from top-of-stack address to location to store the ! 1442: function parameter if it can't go in a register. ! 1443: Addresses for following parameters are computed relative to this one. ! 1444: ! 1445: It also has the effect of counting register arguments in the total ! 1446: argument size. */ ! 1447: #define FIRST_PARM_CALLER_OFFSET(FNDECL) 0 ! 1448: ! 1449: /* When a parameter is passed in a register, stack space is still ! 1450: allocated for it. For the MIPS, stack space must be allocated, cf ! 1451: Asm Lang Prog Guide page 7-8. ! 1452: ! 1453: BEWARE that some space is also allocated for non existing arguments ! 1454: in register. In case an argument list is of form GF used registers ! 1455: are a0 (a2,a3), but we should push over a1... */ ! 1456: ! 1457: #define REG_PARM_STACK_SPACE(FNDECL) (4*4) ! 1458: ! 1459: /* Define this if it is the responsibility of the caller to ! 1460: allocate the area reserved for arguments passed in registers. ! 1461: If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect ! 1462: of this macro is to determine whether the space is included in ! 1463: `current_function_outgoing_args_size'. */ ! 1464: #define OUTGOING_REG_PARM_STACK_SPACE ! 1465: ! 1466: /* Align stack frames on 64 bits (Double Word ). */ ! 1467: #define STACK_BOUNDARY 64 ! 1468: ! 1469: /* Make sure 16 bytes are always allocated on the stack. */ ! 1470: ! 1471: #ifndef STACK_ARGS_ADJUST ! 1472: #define STACK_ARGS_ADJUST(SIZE) \ ! 1473: { \ ! 1474: if (SIZE.constant < 16) \ ! 1475: SIZE.constant = 16; \ ! 1476: } ! 1477: #endif ! 1478: ! 1479: ! 1480: /* A C expression that should indicate the number of bytes of its ! 1481: own arguments that a function function pops on returning, or 0 ! 1482: if the function pops no arguments and the caller must therefore ! 1483: pop them all after the function returns. ! 1484: ! 1485: FUNTYPE is a C variable whose value is a tree node that ! 1486: describes the function in question. Normally it is a node of ! 1487: type `FUNCTION_TYPE' that describes the data type of the function. ! 1488: From this it is possible to obtain the data types of the value ! 1489: and arguments (if known). ! 1490: ! 1491: When a call to a library function is being considered, FUNTYPE ! 1492: will contain an identifier node for the library function. Thus, ! 1493: if you need to distinguish among various library functions, you ! 1494: can do so by their names. Note that "library function" in this ! 1495: context means a function used to perform arithmetic, whose name ! 1496: is known specially in the compiler and was not mentioned in the ! 1497: C code being compiled. ! 1498: ! 1499: STACK-SIZE is the number of bytes of arguments passed on the ! 1500: stack. If a variable number of bytes is passed, it is zero, and ! 1501: argument popping will always be the responsibility of the ! 1502: calling function. */ ! 1503: ! 1504: #define RETURN_POPS_ARGS(FUNTYPE, SIZE) 0 ! 1505: ! 1506: ! 1507: /* Symbolic macros for the registers used to return integer and floating ! 1508: point values. */ ! 1509: ! 1510: #define GP_RETURN (GP_REG_FIRST + 2) ! 1511: #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0)) ! 1512: ! 1513: /* Symbolic macros for the first/last argument registers. */ ! 1514: ! 1515: #define GP_ARG_FIRST (GP_REG_FIRST + 4) ! 1516: #define GP_ARG_LAST (GP_REG_FIRST + 7) ! 1517: #define FP_ARG_FIRST (FP_REG_FIRST + 12) ! 1518: #define FP_ARG_LAST (FP_REG_FIRST + 15) ! 1519: ! 1520: #define MAX_ARGS_IN_REGISTERS 4 ! 1521: ! 1522: /* Define how to find the value returned by a library function ! 1523: assuming the value has mode MODE. */ ! 1524: ! 1525: #define LIBCALL_VALUE(MODE) \ ! 1526: gen_rtx (REG, MODE, \ ! 1527: (GET_MODE_CLASS (MODE) == MODE_FLOAT) \ ! 1528: ? FP_RETURN \ ! 1529: : GP_RETURN) ! 1530: ! 1531: /* Define how to find the value returned by a function. ! 1532: VALTYPE is the data type of the value (as a tree). ! 1533: If the precise function being called is known, FUNC is its FUNCTION_DECL; ! 1534: otherwise, FUNC is 0. */ ! 1535: ! 1536: #define FUNCTION_VALUE(VALTYPE, FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) ! 1537: ! 1538: ! 1539: /* 1 if N is a possible register number for a function value. ! 1540: On the MIPS, R2 R3 and F0 F2 are the only register thus used. ! 1541: Currently, R2 and F0 are only implemented here (C has no complex type) */ ! 1542: ! 1543: #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN) ! 1544: ! 1545: /* 1 if N is a possible register number for function argument passing. */ ! 1546: ! 1547: #define FUNCTION_ARG_REGNO_P(N) (((N) >= GP_ARG_FIRST && (N) <= GP_ARG_LAST) \ ! 1548: || ((N) >= FP_ARG_FIRST && (N) <= FP_ARG_LAST \ ! 1549: && (0 == (N) % 2))) ! 1550: ! 1551: /* A C expression which can inhibit the returning of certain function ! 1552: values in registers, based on the type of value. A nonzero value says ! 1553: to return the function value in memory, just as large structures are ! 1554: always returned. Here TYPE will be a C expression of type ! 1555: `tree', representing the data type of the value. ! 1556: ! 1557: Note that values of mode `BLKmode' are returned in memory ! 1558: regardless of this macro. Also, the option `-fpcc-struct-return' ! 1559: takes effect regardless of this macro. On most systems, it is ! 1560: possible to leave the macro undefined; this causes a default ! 1561: definition to be used, whose value is the constant 0. ! 1562: ! 1563: GCC normally converts 1 byte structures into chars, 2 byte ! 1564: structs into shorts, and 4 byte structs into ints, and returns ! 1565: them this way. Defining the following macro overrides this, ! 1566: to give us MIPS cc compatibility. */ ! 1567: ! 1568: #define RETURN_IN_MEMORY(TYPE) \ ! 1569: ((TREE_CODE (TYPE) == RECORD_TYPE) || (TREE_CODE (TYPE) == UNION_TYPE)) ! 1570: ! 1571: ! 1572: /* A code distinguishing the floating point format of the target ! 1573: machine. There are three defined values: IEEE_FLOAT_FORMAT, ! 1574: VAX_FLOAT_FORMAT, and UNKNOWN_FLOAT_FORMAT. */ ! 1575: ! 1576: #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT ! 1577: ! 1578: ! 1579: /* Define a data type for recording info about an argument list ! 1580: during the scan of that argument list. This data type should ! 1581: hold all necessary information about the function itself ! 1582: and about the args processed so far, enough to enable macros ! 1583: such as FUNCTION_ARG to determine where the next arg should go. ! 1584: */ ! 1585: ! 1586: typedef struct mips_args { ! 1587: int gp_reg_found; ! 1588: int arg_number; ! 1589: int arg_words; ! 1590: } CUMULATIVE_ARGS; ! 1591: ! 1592: /* Initialize a variable CUM of type CUMULATIVE_ARGS ! 1593: for a call to a function whose data type is FNTYPE. ! 1594: For a library call, FNTYPE is 0. ! 1595: ! 1596: */ ! 1597: ! 1598: #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME) \ ! 1599: init_cumulative_args (&CUM, FNTYPE, LIBNAME) \ ! 1600: ! 1601: /* Update the data in CUM to advance over an argument ! 1602: of mode MODE and data type TYPE. ! 1603: (TYPE is null for libcalls where that information may not be available.) */ ! 1604: ! 1605: #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ ! 1606: function_arg_advance (&CUM, MODE, TYPE, NAMED) ! 1607: ! 1608: /* Determine where to put an argument to a function. ! 1609: Value is zero to push the argument on the stack, ! 1610: or a hard register in which to store the argument. ! 1611: ! 1612: MODE is the argument's machine mode. ! 1613: TYPE is the data type of the argument (as a tree). ! 1614: This is null for libcalls where that information may ! 1615: not be available. ! 1616: CUM is a variable of type CUMULATIVE_ARGS which gives info about ! 1617: the preceding args and about the function being called. ! 1618: NAMED is nonzero if this argument is a named parameter ! 1619: (otherwise it is an extra parameter matching an ellipsis). */ ! 1620: ! 1621: #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ ! 1622: function_arg( &CUM, MODE, TYPE, NAMED) ! 1623: ! 1624: /* For an arg passed partly in registers and partly in memory, ! 1625: this is the number of registers used. ! 1626: For args passed entirely in registers or entirely in memory, zero. */ ! 1627: ! 1628: #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ ! 1629: function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED) ! 1630: ! 1631: /* If defined, a C expression that gives the alignment boundary, in ! 1632: bits, of an argument with the specified mode and type. If it is ! 1633: not defined, `PARM_BOUNDARY' is used for all arguments. */ ! 1634: ! 1635: #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ ! 1636: (((TYPE) != 0) \ ! 1637: ? ((TYPE_ALIGN(TYPE) <= PARM_BOUNDARY) \ ! 1638: ? PARM_BOUNDARY \ ! 1639: : TYPE_ALIGN(TYPE)) \ ! 1640: : ((GET_MODE_ALIGNMENT(MODE) <= PARM_BOUNDARY) \ ! 1641: ? PARM_BOUNDARY \ ! 1642: : GET_MODE_ALIGNMENT(MODE))) ! 1643: ! 1644: ! 1645: /* This macro generates the assembly code for function entry. ! 1646: FILE is a stdio stream to output the code to. ! 1647: SIZE is an int: how many units of temporary storage to allocate. ! 1648: Refer to the array `regs_ever_live' to determine which registers ! 1649: to save; `regs_ever_live[I]' is nonzero if register number I ! 1650: is ever used in the function. This macro is responsible for ! 1651: knowing which registers should not be saved even if used. */ ! 1652: ! 1653: #define FUNCTION_PROLOGUE(FILE, SIZE) function_prologue(FILE, SIZE) ! 1654: ! 1655: /* This macro generates the assembly code for function exit, ! 1656: on machines that need it. If FUNCTION_EPILOGUE is not defined ! 1657: then individual return instructions are generated for each ! 1658: return statement. Args are same as for FUNCTION_PROLOGUE. */ ! 1659: ! 1660: #define FUNCTION_EPILOGUE(FILE, SIZE) function_epilogue(FILE, SIZE) ! 1661: ! 1662: /* Define the number of delay slots needed for the function epilogue. ! 1663: ! 1664: On the mips, we need a slot if either no stack has been allocated, ! 1665: or the only register saved is the return register. */ ! 1666: ! 1667: #define DELAY_SLOTS_FOR_EPILOGUE mips_epilogue_delay_slots () ! 1668: ! 1669: /* Define whether INSN can be placed in delay slot N for the epilogue. ! 1670: No references to the stack must be made, since on the MIPS, the ! 1671: delay slot is done after the stack has been cleaned up. */ ! 1672: ! 1673: #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN,N) \ ! 1674: (get_attr_dslot (INSN) == DSLOT_NO \ ! 1675: && get_attr_length (INSN) == 1 \ ! 1676: && ! reg_mentioned_p (stack_pointer_rtx, PATTERN (INSN)) \ ! 1677: && ! reg_mentioned_p (frame_pointer_rtx, PATTERN (INSN))) ! 1678: ! 1679: /* Tell prologue and epilogue if register REGNO should be saved / restored. */ ! 1680: ! 1681: #define MUST_SAVE_REGISTER(regno) \ ! 1682: ((regs_ever_live[regno] && !call_used_regs[regno]) \ ! 1683: || (regno == FRAME_POINTER_REGNUM && frame_pointer_needed) \ ! 1684: || (regno == 31 && regs_ever_live[31])) ! 1685: ! 1686: /* ALIGN FRAMES on double word boundaries */ ! 1687: ! 1688: #define MIPS_STACK_ALIGN(LOC) (((LOC)+7) & 0xfffffff8) ! 1689: ! 1690: ! 1691: /* Output assembler code to FILE to increment profiler label # LABELNO ! 1692: for profiling a function entry. */ ! 1693: ! 1694: #define FUNCTION_PROFILER(FILE, LABELNO) \ ! 1695: { \ ! 1696: fprintf (FILE, "\t.set\tnoreorder\n"); \ ! 1697: fprintf (FILE, "\t.set\tnoat\n"); \ ! 1698: fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \ ! 1699: reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \ ! 1700: fprintf (FILE, "\tjal\t_mcount\n"); \ ! 1701: fprintf (FILE, "\tsubu\t%s,%s,8\t\t# _mcount pops 2 words from stack\n", \ ! 1702: reg_names[STACK_POINTER_REGNUM], \ ! 1703: reg_names[STACK_POINTER_REGNUM]); \ ! 1704: fprintf (FILE, "\t.set\treorder\n"); \ ! 1705: fprintf (FILE, "\t.set\tat\n"); \ ! 1706: } ! 1707: ! 1708: /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, ! 1709: the stack pointer does not matter. The value is tested only in ! 1710: functions that have frame pointers. ! 1711: No definition is equivalent to always zero. */ ! 1712: ! 1713: #define EXIT_IGNORE_STACK 1 ! 1714: ! 1715: ! 1716: /* A C statement to output, on the stream FILE, assembler code for a ! 1717: block of data that contains the constant parts of a trampoline. ! 1718: This code should not include a label--the label is taken care of ! 1719: automatically. */ ! 1720: ! 1721: #define TRAMPOLINE_TEMPLATE(STREAM) \ ! 1722: { \ ! 1723: fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \ ! 1724: fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \ ! 1725: fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \ ! 1726: fprintf (STREAM, "\t.word\t0x8fe30010\t\t# lw $3,16($31)\n"); \ ! 1727: fprintf (STREAM, "\t.word\t0x8fe20014\t\t# lw $2,20($31)\n"); \ ! 1728: fprintf (STREAM, "\t.word\t0x00600008\t\t# jr $3\n"); \ ! 1729: fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \ ! 1730: fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \ ! 1731: fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \ ! 1732: } ! 1733: ! 1734: /* A C expression for the size in bytes of the trampoline, as an ! 1735: integer. */ ! 1736: ! 1737: #define TRAMPOLINE_SIZE (9*4) ! 1738: ! 1739: /* Alignment required for trampolines, in bits. ! 1740: ! 1741: If you don't define this macro, the value of `BIGGEST_ALIGNMENT' ! 1742: is used for aligning trampolines. */ ! 1743: ! 1744: /* #define TRAMPOLINE_ALIGNMENT 32 */ ! 1745: ! 1746: /* A C statement to initialize the variable parts of a trampoline. ! 1747: ADDR is an RTX for the address of the trampoline; FNADDR is an ! 1748: RTX for the address of the nested function; STATIC_CHAIN is an ! 1749: RTX for the static chain value that should be passed to the ! 1750: function when it is called. */ ! 1751: ! 1752: #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \ ! 1753: { \ ! 1754: rtx addr = ADDR; \ ! 1755: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 28)), FUNC); \ ! 1756: emit_move_insn (gen_rtx (MEM, SImode, plus_constant (addr, 32)), CHAIN); \ ! 1757: \ ! 1758: /* Attempt to make stack executable */ \ ! 1759: emit_library_call (gen_rtx (SYMBOL_REF, Pmode, "__enable_execute_stack"), \ ! 1760: 0, VOIDmode, 1, addr, Pmode); \ ! 1761: } ! 1762: ! 1763: ! 1764: /* Attempt to turn on access permissions for the stack. */ ! 1765: ! 1766: #define TRANSFER_FROM_TRAMPOLINE \ ! 1767: \ ! 1768: void \ ! 1769: __enable_execute_stack (addr) \ ! 1770: char *addr; \ ! 1771: { \ ! 1772: int size = getpagesize (); \ ! 1773: int mask = ~(size-1); \ ! 1774: char *page = (char *) (((int) addr) & mask); \ ! 1775: char *end = (char *) ((((int) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ ! 1776: \ ! 1777: /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ ! 1778: if (mprotect (page, end - page, 7) < 0) \ ! 1779: perror ("mprotect of trampoline code"); \ ! 1780: \ ! 1781: /* \ ! 1782: if (cacheflush (addr, TRAMPOLINE_SIZE, 1) < 0) \ ! 1783: perror ("cacheflush of trampoline code"); \ ! 1784: */ \ ! 1785: } ! 1786: ! 1787: ! 1788: /* Addressing modes, and classification of registers for them. */ ! 1789: ! 1790: /* #define HAVE_POST_INCREMENT */ ! 1791: /* #define HAVE_POST_DECREMENT */ ! 1792: ! 1793: /* #define HAVE_PRE_DECREMENT */ ! 1794: /* #define HAVE_PRE_INCREMENT */ ! 1795: ! 1796: /* These assume that REGNO is a hard or pseudo reg number. ! 1797: They give nonzero only if REGNO is a hard reg of the suitable class ! 1798: or a pseudo reg currently allocated to a suitable hard reg. ! 1799: These definitions are NOT overridden anywhere. */ ! 1800: ! 1801: #define GP_REG_OR_PSEUDO_STRICT_P(regno) \ ! 1802: GP_REG_P((regno < FIRST_PSEUDO_REGISTER) ? regno : reg_renumber[regno]) ! 1803: ! 1804: #define GP_REG_OR_PSEUDO_NONSTRICT_P(regno) \ ! 1805: (((regno) >= FIRST_PSEUDO_REGISTER) || (GP_REG_P (regno))) ! 1806: ! 1807: #define REGNO_OK_FOR_INDEX_P(regno) GP_REG_OR_PSEUDO_STRICT_P (regno) ! 1808: #define REGNO_OK_FOR_BASE_P(regno) GP_REG_OR_PSEUDO_STRICT_P (regno) ! 1809: ! 1810: /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx ! 1811: and check its validity for a certain class. ! 1812: We have two alternate definitions for each of them. ! 1813: The usual definition accepts all pseudo regs; the other rejects them all. ! 1814: The symbol REG_OK_STRICT causes the latter definition to be used. ! 1815: ! 1816: Most source files want to accept pseudo regs in the hope that ! 1817: they will get allocated to the class that the insn wants them to be in. ! 1818: Some source files that are used after register allocation ! 1819: need to be strict. */ ! 1820: ! 1821: #ifndef REG_OK_STRICT ! 1822: ! 1823: #define REG_OK_STRICT_P 0 ! 1824: #define REG_OK_FOR_INDEX_P(X) GP_REG_OR_PSEUDO_NONSTRICT_P (REGNO (X)) ! 1825: #define REG_OK_FOR_BASE_P(X) GP_REG_OR_PSEUDO_NONSTRICT_P (REGNO (X)) ! 1826: ! 1827: #else ! 1828: ! 1829: #define REG_OK_STRICT_P 1 ! 1830: #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) ! 1831: #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) ! 1832: ! 1833: #endif ! 1834: ! 1835: ! 1836: /* Maximum number of registers that can appear in a valid memory address. */ ! 1837: ! 1838: #define MAX_REGS_PER_ADDRESS 1 ! 1839: ! 1840: /* A C compound statement with a conditional `goto LABEL;' executed ! 1841: if X (an RTX) is a legitimate memory address on the target ! 1842: machine for a memory operand of mode MODE. ! 1843: ! 1844: It usually pays to define several simpler macros to serve as ! 1845: subroutines for this one. Otherwise it may be too complicated ! 1846: to understand. ! 1847: ! 1848: This macro must exist in two variants: a strict variant and a ! 1849: non-strict one. The strict variant is used in the reload pass. ! 1850: It must be defined so that any pseudo-register that has not been ! 1851: allocated a hard register is considered a memory reference. In ! 1852: contexts where some kind of register is required, a ! 1853: pseudo-register with no hard register must be rejected. ! 1854: ! 1855: The non-strict variant is used in other passes. It must be ! 1856: defined to accept all pseudo-registers in every context where ! 1857: some kind of register is required. ! 1858: ! 1859: Compiler source files that want to use the strict variant of ! 1860: this macro define the macro `REG_OK_STRICT'. You should use an ! 1861: `#ifdef REG_OK_STRICT' conditional to define the strict variant ! 1862: in that case and the non-strict variant otherwise. ! 1863: ! 1864: Typically among the subroutines used to define ! 1865: `GO_IF_LEGITIMATE_ADDRESS' are subroutines to check for ! 1866: acceptable registers for various purposes (one for base ! 1867: registers, one for index registers, and so on). Then only these ! 1868: subroutine macros need have two variants; the higher levels of ! 1869: macros may be the same whether strict or not. ! 1870: ! 1871: Normally, constant addresses which are the sum of a `symbol_ref' ! 1872: and an integer are stored inside a `const' RTX to mark them as ! 1873: constant. Therefore, there is no need to recognize such sums ! 1874: specifically as legitimate addresses. Normally you would simply ! 1875: recognize any `const' as legitimate. ! 1876: ! 1877: Usually `PRINT_OPERAND_ADDRESS' is not prepared to handle ! 1878: constant sums that are not marked with `const'. It assumes ! 1879: that a naked `plus' indicates indexing. If so, then you *must* ! 1880: reject such naked constant sums as illegitimate addresses, so ! 1881: that none of them will be given to `PRINT_OPERAND_ADDRESS'. ! 1882: ! 1883: On some machines, whether a symbolic address is legitimate ! 1884: depends on the section that the address refers to. On these ! 1885: machines, define the macro `ENCODE_SECTION_INFO' to store the ! 1886: information into the `symbol_ref', and then check for it here. ! 1887: When you see a `const', you will have to look inside it to find ! 1888: the `symbol_ref' in order to determine the section. */ ! 1889: ! 1890: #if 1 ! 1891: #define GO_PRINTF(x) trace(x) ! 1892: #define GO_PRINTF2(x,y) trace(x,y) ! 1893: #define GO_DEBUG_RTX(x) debug_rtx(x) ! 1894: ! 1895: #else ! 1896: #define GO_PRINTF(x) ! 1897: #define GO_PRINTF2(x,y) ! 1898: #define GO_DEBUG_RTX(x) ! 1899: #endif ! 1900: ! 1901: #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ ! 1902: { \ ! 1903: register rtx xinsn = (X); \ ! 1904: \ ! 1905: if (TARGET_DEBUG_B_MODE) \ ! 1906: { \ ! 1907: GO_PRINTF2 ("\n========== GO_IF_LEGITIMATE_ADDRESS, %sstrict\n", \ ! 1908: (REG_OK_STRICT_P) ? "" : "not "); \ ! 1909: GO_DEBUG_RTX (xinsn); \ ! 1910: } \ ! 1911: \ ! 1912: if (GET_CODE (xinsn) == REG && REG_OK_FOR_BASE_P (xinsn)) \ ! 1913: goto ADDR; \ ! 1914: \ ! 1915: if (CONSTANT_ADDRESS_P (xinsn)) \ ! 1916: goto ADDR; \ ! 1917: \ ! 1918: if (GET_CODE (xinsn) == PLUS) \ ! 1919: { \ ! 1920: register rtx xplus0 = XEXP (xinsn, 0); \ ! 1921: register rtx xplus1 = XEXP (xinsn, 1); \ ! 1922: register enum rtx_code code0 = GET_CODE (xplus0); \ ! 1923: register enum rtx_code code1 = GET_CODE (xplus1); \ ! 1924: \ ! 1925: if (code0 != REG && code1 == REG) \ ! 1926: { \ ! 1927: xplus0 = XEXP (xinsn, 1); \ ! 1928: xplus1 = XEXP (xinsn, 0); \ ! 1929: code0 = GET_CODE (xplus0); \ ! 1930: code1 = GET_CODE (xplus1); \ ! 1931: } \ ! 1932: \ ! 1933: if (code0 == REG && REG_OK_FOR_BASE_P (xplus0)) \ ! 1934: { \ ! 1935: if (code1 == CONST_INT) \ ! 1936: { \ ! 1937: register unsigned adj_offset = INTVAL (xplus1) + 0x8000; \ ! 1938: \ ! 1939: if ((adj_offset <= 0xffff) \ ! 1940: && (adj_offset + GET_MODE_SIZE (MODE) - 1 <= 0xffff)) \ ! 1941: goto ADDR; \ ! 1942: } \ ! 1943: \ ! 1944: /* For some code sequences, you actually get better code by \ ! 1945: pretending that the MIPS supports an address mode of a \ ! 1946: constant address + a register, even though the real \ ! 1947: machine doesn't support it. This is because the \ ! 1948: assembler can use $r1 to load just the high 16 bits, add \ ! 1949: in the register, and fold the low 16 bits into the memory \ ! 1950: reference, wheras the compiler generates a 4 instruction \ ! 1951: sequence. On the other hand, CSE is not as effective. \ ! 1952: It would be a win to generate the lui directly, but the \ ! 1953: MIPS assembler does not have syntax to generate the \ ! 1954: appropriate relocation. */ \ ! 1955: \ ! 1956: else if (!TARGET_DEBUG_A_MODE \ ! 1957: && code0 == REG \ ! 1958: && CONSTANT_ADDRESS_P (xplus1)) \ ! 1959: goto ADDR; \ ! 1960: } \ ! 1961: } \ ! 1962: \ ! 1963: if (TARGET_DEBUG_B_MODE) \ ! 1964: GO_PRINTF ("Not a legitimate address\n"); \ ! 1965: } ! 1966: ! 1967: ! 1968: /* A C expression that is 1 if the RTX X is a constant which is a ! 1969: valid address. On most machines, this can be defined as ! 1970: `CONSTANT_P (X)', but a few machines are more restrictive in ! 1971: which constant addresses are supported. ! 1972: ! 1973: `CONSTANT_P' accepts integer-values expressions whose values are ! 1974: not explicitly known, such as `symbol_ref', `label_ref', and ! 1975: `high' expressions and `const' arithmetic expressions, in ! 1976: addition to `const_int' and `const_double' expressions. */ ! 1977: ! 1978: #define CONSTANT_ADDRESS_P(X) \ ! 1979: (CONSTANT_P (X) && (!HALF_PIC_P () || HALF_PIC_ADDRESS_P (X))) ! 1980: ! 1981: ! 1982: /* Nonzero if the constant value X is a legitimate general operand. ! 1983: It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. ! 1984: ! 1985: At present, GAS doesn't understand li.[sd], so don't allow it ! 1986: to be generated at present. Also, the MIPS assembler does not ! 1987: grok li.d Infinity. */ ! 1988: ! 1989: #define LEGITIMATE_CONSTANT_P(X) \ ! 1990: (GET_CODE (X) != CONST_DOUBLE || mips_const_double_ok (X, GET_MODE (X))) ! 1991: ! 1992: ! 1993: /* A C compound statement that attempts to replace X with a valid ! 1994: memory address for an operand of mode MODE. WIN will be a C ! 1995: statement label elsewhere in the code; the macro definition may ! 1996: use ! 1997: ! 1998: GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); ! 1999: ! 2000: to avoid further processing if the address has become legitimate. ! 2001: ! 2002: X will always be the result of a call to `break_out_memory_refs', ! 2003: and OLDX will be the operand that was given to that function to ! 2004: produce X. ! 2005: ! 2006: The code generated by this macro should not alter the ! 2007: substructure of X. If it transforms X into a more legitimate ! 2008: form, it should assign X (which will always be a C variable) a ! 2009: new value. ! 2010: ! 2011: It is not necessary for this macro to come up with a legitimate ! 2012: address. The compiler has standard ways of doing so in all ! 2013: cases. In fact, it is safe for this macro to do nothing. But ! 2014: often a machine-dependent strategy can generate better code. */ ! 2015: ! 2016: #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) {} ! 2017: ! 2018: ! 2019: /* A C statement or compound statement with a conditional `goto ! 2020: LABEL;' executed if memory address X (an RTX) can have different ! 2021: meanings depending on the machine mode of the memory reference it ! 2022: is used for. ! 2023: ! 2024: Autoincrement and autodecrement addresses typically have ! 2025: mode-dependent effects because the amount of the increment or ! 2026: decrement is the size of the operand being addressed. Some ! 2027: machines have other mode-dependent addresses. Many RISC machines ! 2028: have no mode-dependent addresses. ! 2029: ! 2030: You may assume that ADDR is a valid address for the machine. */ ! 2031: ! 2032: #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {} ! 2033: ! 2034: ! 2035: /* Define this macro if references to a symbol must be treated ! 2036: differently depending on something about the variable or ! 2037: function named by the symbol (such as what section it is in). ! 2038: ! 2039: The macro definition, if any, is executed immediately after the ! 2040: rtl for DECL has been created and stored in `DECL_RTL (DECL)'. ! 2041: The value of the rtl will be a `mem' whose address is a ! 2042: `symbol_ref'. ! 2043: ! 2044: The usual thing for this macro to do is to a flag in the ! 2045: `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified ! 2046: name string in the `symbol_ref' (if one bit is not enough ! 2047: information). ! 2048: ! 2049: The best way to modify the name string is by adding text to the ! 2050: beginning, with suitable punctuation to prevent any ambiguity. ! 2051: Allocate the new name in `saveable_obstack'. You will have to ! 2052: modify `ASM_OUTPUT_LABELREF' to remove and decode the added text ! 2053: and output the name accordingly. ! 2054: ! 2055: You can also check the information stored in the `symbol_ref' in ! 2056: the definition of `GO_IF_LEGITIMATE_ADDRESS' or ! 2057: `PRINT_OPERAND_ADDRESS'. */ ! 2058: ! 2059: #define ENCODE_SECTION_INFO(DECL) \ ! 2060: do \ ! 2061: { \ ! 2062: if (optimize && mips_section_threshold > 0 && TARGET_GP_OPT \ ! 2063: && TREE_CODE (DECL) == VAR_DECL) \ ! 2064: { \ ! 2065: int size = int_size_in_bytes (TREE_TYPE (DECL)); \ ! 2066: \ ! 2067: if (size > 0 && size <= mips_section_threshold) \ ! 2068: SYMBOL_REF_FLAG (XEXP (DECL_RTL (DECL), 0)) = 1; \ ! 2069: } \ ! 2070: \ ! 2071: else if (HALF_PIC_P ()) \ ! 2072: HALF_PIC_ENCODE (DECL); \ ! 2073: } \ ! 2074: while (0) ! 2075: ! 2076: ! 2077: /* Specify the machine mode that this machine uses ! 2078: for the index in the tablejump instruction. */ ! 2079: #define CASE_VECTOR_MODE SImode ! 2080: ! 2081: /* Define this if the tablejump instruction expects the table ! 2082: to contain offsets from the address of the table. ! 2083: Do not define this if the table should contain absolute addresses. */ ! 2084: /* #define CASE_VECTOR_PC_RELATIVE */ ! 2085: ! 2086: /* Specify the tree operation to be used to convert reals to integers. */ ! 2087: #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR ! 2088: ! 2089: /* This is the kind of divide that is easiest to do in the general case. */ ! 2090: #define EASY_DIV_EXPR TRUNC_DIV_EXPR ! 2091: ! 2092: /* Define this as 1 if `char' should by default be signed; else as 0. */ ! 2093: #define DEFAULT_SIGNED_CHAR 1 ! 2094: ! 2095: /* Max number of bytes we can move from memory to memory ! 2096: in one reasonably fast instruction. */ ! 2097: #define MOVE_MAX 4 ! 2098: ! 2099: /* Define this macro as a C expression which is nonzero if ! 2100: accessing less than a word of memory (i.e. a `char' or a ! 2101: `short') is no faster than accessing a word of memory, i.e., if ! 2102: such access require more than one instruction or if there is no ! 2103: difference in cost between byte and (aligned) word loads. ! 2104: ! 2105: On RISC machines, it tends to generate better code to define ! 2106: this as 1, since it avoids making a QI or HI mode register. */ ! 2107: #define SLOW_BYTE_ACCESS 1 ! 2108: ! 2109: /* We assume that the store-condition-codes instructions store 0 for false ! 2110: and some other value for true. This is the value stored for true. */ ! 2111: ! 2112: #define STORE_FLAG_VALUE 1 ! 2113: ! 2114: /* Define this if zero-extension is slow (more than one real instruction). */ ! 2115: #define SLOW_ZERO_EXTEND ! 2116: ! 2117: /* Define if shifts truncate the shift count ! 2118: which implies one can omit a sign-extension or zero-extension ! 2119: of a shift count. ! 2120: ! 2121: Only 5 bits are used in SLLV and SRLV */ ! 2122: ! 2123: #define SHIFT_COUNT_TRUNCATED ! 2124: ! 2125: /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits ! 2126: is done just by pretending it is already truncated. */ ! 2127: #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 ! 2128: ! 2129: /* By default, allow $ to be part of an identifier. */ ! 2130: #define DOLLARS_IN_IDENTIFIERS 1 ! 2131: ! 2132: /* Specify the machine mode that pointers have. ! 2133: After generation of rtl, the compiler makes no further distinction ! 2134: between pointers and any other objects of this machine mode. */ ! 2135: #define Pmode SImode ! 2136: ! 2137: /* A function address in a call instruction ! 2138: is a word address (for indexing purposes) ! 2139: so give the MEM rtx a words's mode. */ ! 2140: ! 2141: #define FUNCTION_MODE SImode ! 2142: ! 2143: /* Define TARGET_MEM_FUNCTIONS if we want to use calls to memcpy and ! 2144: memset, instead of the BSD functions bcopy and bzero. */ ! 2145: ! 2146: #if defined(MIPS_SYSV) || defined(OSF_OS) ! 2147: #define TARGET_MEM_FUNCTIONS ! 2148: #endif ! 2149: ! 2150: ! 2151: /* A part of a C `switch' statement that describes the relative ! 2152: costs of constant RTL expressions. It must contain `case' ! 2153: labels for expression codes `const_int', `const', `symbol_ref', ! 2154: `label_ref' and `const_double'. Each case must ultimately reach ! 2155: a `return' statement to return the relative cost of the use of ! 2156: that kind of constant value in an expression. The cost may ! 2157: depend on the precise value of the constant, which is available ! 2158: for examination in X. ! 2159: ! 2160: CODE is the expression code--redundant, since it can be obtained ! 2161: with `GET_CODE (X)'. */ ! 2162: ! 2163: #define CONST_COSTS(X,CODE) \ ! 2164: case CONST_INT: \ ! 2165: /* Always return 0, since we don't have different sized \ ! 2166: instructions, hence different costs according to Richard \ ! 2167: Kenner */ \ ! 2168: return COSTS_N_INSNS (0); \ ! 2169: \ ! 2170: case LABEL_REF: \ ! 2171: return COSTS_N_INSNS (2); \ ! 2172: \ ! 2173: case CONST: \ ! 2174: { \ ! 2175: extern rtx eliminate_constant_term (); \ ! 2176: int offset = 0; \ ! 2177: rtx symref = eliminate_constant_term (X, &offset); \ ! 2178: \ ! 2179: if (GET_CODE (symref) == LABEL_REF) \ ! 2180: return COSTS_N_INSNS (2); \ ! 2181: \ ! 2182: if (GET_CODE (symref) != SYMBOL_REF) \ ! 2183: return COSTS_N_INSNS (4); \ ! 2184: \ ! 2185: /* let's be paranoid.... */ \ ! 2186: if (offset < -32768 || offset > 32767) \ ! 2187: return COSTS_N_INSNS (2); \ ! 2188: \ ! 2189: return COSTS_N_INSNS (SYMBOL_REF_FLAG (symref) ? 1 : 2); \ ! 2190: } \ ! 2191: \ ! 2192: case SYMBOL_REF: \ ! 2193: return COSTS_N_INSNS (SYMBOL_REF_FLAG (X) ? 1 : 2); \ ! 2194: \ ! 2195: case CONST_DOUBLE: \ ! 2196: return COSTS_N_INSNS ((CONST_DOUBLE_HIGH (X) == 0 \ ! 2197: && CONST_DOUBLE_LOW (X)) ? 2 : 4); ! 2198: ! 2199: ! 2200: /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. ! 2201: This can be used, for example, to indicate how costly a multiply ! 2202: instruction is. In writing this macro, you can use the construct ! 2203: `COSTS_N_INSNS (N)' to specify a cost equal to N fast instructions. ! 2204: ! 2205: This macro is optional; do not define it if the default cost ! 2206: assumptions are adequate for the target machine. ! 2207: ! 2208: If -mdebugd is used, change the multiply cost to 2, so multiply by ! 2209: a constant isn't converted to a series of shifts. This helps ! 2210: strength reduction, and also makes it easier to identify what the ! 2211: compiler is doing. */ ! 2212: ! 2213: #define RTX_COSTS(X,CODE) \ ! 2214: case MEM: \ ! 2215: { \ ! 2216: int num_words = (GET_MODE_SIZE (GET_MODE (X)) > UNITS_PER_WORD) ? 2 : 1; \ ! 2217: if (simple_memory_operand (X, GET_MODE (X))) \ ! 2218: return COSTS_N_INSNS (num_words); \ ! 2219: \ ! 2220: return COSTS_N_INSNS (2*num_words); \ ! 2221: } \ ! 2222: \ ! 2223: case FFS: \ ! 2224: return COSTS_N_INSNS (6); \ ! 2225: \ ! 2226: case NOT: \ ! 2227: return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 2 : 1); \ ! 2228: \ ! 2229: case AND: \ ! 2230: case IOR: \ ! 2231: case XOR: \ ! 2232: if (GET_MODE (X) == DImode) \ ! 2233: return COSTS_N_INSNS (2); \ ! 2234: \ ! 2235: if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ ! 2236: { \ ! 2237: rtx number = XEXP (X, 1); \ ! 2238: if (SMALL_INT_UNSIGNED (number)) \ ! 2239: return COSTS_N_INSNS (1); \ ! 2240: \ ! 2241: else if (SMALL_INT (number)) \ ! 2242: return COSTS_N_INSNS (2); \ ! 2243: \ ! 2244: return COSTS_N_INSNS (3); \ ! 2245: } \ ! 2246: \ ! 2247: return COSTS_N_INSNS (1); \ ! 2248: \ ! 2249: case ASHIFT: \ ! 2250: case ASHIFTRT: \ ! 2251: case LSHIFT: \ ! 2252: case LSHIFTRT: \ ! 2253: if (GET_MODE (X) == DImode) \ ! 2254: return COSTS_N_INSNS ((GET_CODE (XEXP (X, 1)) == CONST_INT) ? 12 : 4); \ ! 2255: \ ! 2256: return COSTS_N_INSNS (1); \ ! 2257: \ ! 2258: case ABS: \ ! 2259: { \ ! 2260: enum machine_mode xmode = GET_MODE (X); \ ! 2261: if (xmode == SFmode || xmode == DFmode) \ ! 2262: return COSTS_N_INSNS (1); \ ! 2263: \ ! 2264: return COSTS_N_INSNS (4); \ ! 2265: } \ ! 2266: \ ! 2267: case PLUS: \ ! 2268: case MINUS: \ ! 2269: { \ ! 2270: enum machine_mode xmode = GET_MODE (X); \ ! 2271: if (xmode == SFmode || xmode == DFmode) \ ! 2272: return COSTS_N_INSNS (2); \ ! 2273: \ ! 2274: if (xmode == DImode) \ ! 2275: return COSTS_N_INSNS (4); \ ! 2276: \ ! 2277: return COSTS_N_INSNS (1); \ ! 2278: } \ ! 2279: \ ! 2280: case NEG: \ ! 2281: return COSTS_N_INSNS ((GET_MODE (X) == DImode) ? 4 : 1); \ ! 2282: \ ! 2283: case MULT: \ ! 2284: { \ ! 2285: enum machine_mode xmode = GET_MODE (X); \ ! 2286: if (xmode == SFmode) \ ! 2287: return COSTS_N_INSNS (4); \ ! 2288: \ ! 2289: if (xmode == DFmode) \ ! 2290: return COSTS_N_INSNS (5); \ ! 2291: \ ! 2292: return COSTS_N_INSNS ((TARGET_DEBUG_D_MODE) ? 2 : 12); \ ! 2293: } \ ! 2294: \ ! 2295: case DIV: \ ! 2296: case MOD: \ ! 2297: { \ ! 2298: enum machine_mode xmode = GET_MODE (X); \ ! 2299: if (xmode == SFmode) \ ! 2300: return COSTS_N_INSNS (12); \ ! 2301: \ ! 2302: if (xmode == DFmode) \ ! 2303: return COSTS_N_INSNS (19); \ ! 2304: } \ ! 2305: /* fall through */ \ ! 2306: \ ! 2307: case UDIV: \ ! 2308: case UMOD: \ ! 2309: return COSTS_N_INSNS (35); ! 2310: ! 2311: /* An expression giving the cost of an addressing mode that ! 2312: contains ADDRESS. If not defined, the cost is computed from the ! 2313: form of the ADDRESS expression and the `CONST_COSTS' values. ! 2314: ! 2315: For most CISC machines, the default cost is a good approximation ! 2316: of the true cost of the addressing mode. However, on RISC ! 2317: machines, all instructions normally have the same length and ! 2318: execution time. Hence all addresses will have equal costs. ! 2319: ! 2320: In cases where more than one form of an address is known, the ! 2321: form with the lowest cost will be used. If multiple forms have ! 2322: the same, lowest, cost, the one that is the most complex will be ! 2323: used. ! 2324: ! 2325: For example, suppose an address that is equal to the sum of a ! 2326: register and a constant is used twice in the same basic block. ! 2327: When this macro is not defined, the address will be computed in ! 2328: a register and memory references will be indirect through that ! 2329: register. On machines where the cost of the addressing mode ! 2330: containing the sum is no higher than that of a simple indirect ! 2331: reference, this will produce an additional instruction and ! 2332: possibly require an additional register. Proper specification ! 2333: of this macro eliminates this overhead for such machines. ! 2334: ! 2335: Similar use of this macro is made in strength reduction of loops. ! 2336: ! 2337: ADDRESS need not be valid as an address. In such a case, the ! 2338: cost is not relevant and can be any value; invalid addresses ! 2339: need not be assigned a different cost. ! 2340: ! 2341: On machines where an address involving more than one register is ! 2342: as cheap as an address computation involving only one register, ! 2343: defining `ADDRESS_COST' to reflect this can cause two registers ! 2344: to be live over a region of code where only one would have been ! 2345: if `ADDRESS_COST' were not defined in that manner. This effect ! 2346: should be considered in the definition of this macro. ! 2347: Equivalent costs should probably only be given to addresses with ! 2348: different numbers of registers on machines with lots of registers. ! 2349: ! 2350: This macro will normally either not be defined or be defined as ! 2351: a constant. */ ! 2352: ! 2353: #define ADDRESS_COST(ADDR) (REG_P (ADDR) ? 1 : mips_address_cost (ADDR)) ! 2354: ! 2355: /* A C expression for the cost of moving data from a register in ! 2356: class FROM to one in class TO. The classes are expressed using ! 2357: the enumeration values such as `GENERAL_REGS'. A value of 2 is ! 2358: the default; other values are interpreted relative to that. ! 2359: ! 2360: It is not required that the cost always equal 2 when FROM is the ! 2361: same as TO; on some machines it is expensive to move between ! 2362: registers if they are not general registers. ! 2363: ! 2364: If reload sees an insn consisting of a single `set' between two ! 2365: hard registers, and if `REGISTER_MOVE_COST' applied to their ! 2366: classes returns a value of 2, reload does not check to ensure ! 2367: that the constraints of the insn are met. Setting a cost of ! 2368: other than 2 will allow reload to verify that the constraints are ! 2369: met. You should do this if the `movM' pattern's constraints do ! 2370: not allow such copying. */ ! 2371: ! 2372: #define REGISTER_MOVE_COST(FROM, TO) 4 /* force reload to use constraints */ ! 2373: ! 2374: /* A C expression for the cost of a branch instruction. A value of ! 2375: 1 is the default; other values are interpreted relative to that. */ ! 2376: ! 2377: #define BRANCH_COST \ ! 2378: ((mips_cpu == PROCESSOR_R4000 || mips_cpu == PROCESSOR_R6000) ? 2 : 1) ! 2379: ! 2380: ! 2381: /* Used in by the peephole code. */ ! 2382: #define classify_op(op,mode) (mips_rtx_classify[ (int)GET_CODE (op) ]) ! 2383: #define additive_op(op,mode) ((classify_op (op,mode) & CLASS_ADD_OP) != 0) ! 2384: #define divmod_op(op,mode) ((classify_op (op,mode) & CLASS_DIVMOD_OP) != 0) ! 2385: #define unsigned_op(op,mode) ((classify_op (op,mode) & CLASS_UNSIGNED_OP) != 0) ! 2386: ! 2387: #define CLASS_ADD_OP 0x01 /* operator is PLUS/MINUS */ ! 2388: #define CLASS_DIVMOD_OP 0x02 /* operator is {,U}{DIV,MOD} */ ! 2389: #define CLASS_UNSIGNED_OP 0x04 /* operator is U{DIV,MOD} */ ! 2390: #define CLASS_CMP_OP 0x08 /* operator is comparison */ ! 2391: #define CLASS_EQUALITY_OP 0x10 /* operator is == or != */ ! 2392: #define CLASS_FCMP_OP 0x08 /* operator is fp. compare */ ! 2393: ! 2394: #define CLASS_UNS_CMP_OP (CLASS_UNSIGNED_OP | CLASS_CMP_OP) ! 2395: ! 2396: ! 2397: /* Optionally define this if you have added predicates to ! 2398: `MACHINE.c'. This macro is called within an initializer of an ! 2399: array of structures. The first field in the structure is the ! 2400: name of a predicate and the second field is an arrary of rtl ! 2401: codes. For each predicate, list all rtl codes that can be in ! 2402: expressions matched by the predicate. The list should have a ! 2403: trailing comma. Here is an example of two entries in the list ! 2404: for a typical RISC machine: ! 2405: ! 2406: #define PREDICATE_CODES \ ! 2407: {"gen_reg_rtx_operand", {SUBREG, REG}}, \ ! 2408: {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}}, ! 2409: ! 2410: Defining this macro does not affect the generated code (however, ! 2411: incorrect definitions that omit an rtl code that may be matched ! 2412: by the predicate can cause the compiler to malfunction). ! 2413: Instead, it allows the table built by `genrecog' to be more ! 2414: compact and efficient, thus speeding up the compiler. The most ! 2415: important predicates to include in the list specified by this ! 2416: macro are thoses used in the most insn patterns. */ ! 2417: ! 2418: #define PREDICATE_CODES \ ! 2419: {"uns_arith_operand", { REG, CONST_INT, SUBREG }}, \ ! 2420: {"arith_operand", { REG, CONST_INT, SUBREG }}, \ ! 2421: {"arith32_operand", { REG, CONST_INT, SUBREG }}, \ ! 2422: {"reg_or_0_operand", { REG, CONST_INT, SUBREG }}, \ ! 2423: {"small_int", { CONST_INT }}, \ ! 2424: {"large_int", { CONST_INT }}, \ ! 2425: {"md_register_operand", { REG }}, \ ! 2426: {"mips_const_double_ok", { CONST_DOUBLE }}, \ ! 2427: {"simple_memory_operand", { MEM, SUBREG }}, \ ! 2428: {"call_memory_operand", { MEM, SUBREG }}, \ ! 2429: {"equality_op", { EQ, NE }}, \ ! 2430: {"cmp_op", { EQ, NE, GT, GE, GTU, GEU, LT, LE, \ ! 2431: LTU, LEU }}, \ ! 2432: {"cmp2_op", { EQ, NE, GT, GE, GTU, GEU, LT, LE, \ ! 2433: LTU, LEU }}, \ ! 2434: {"fcmp_op", { EQ, NE, GT, GE, LT, LE }}, \ ! 2435: {"uns_cmp_op", { GTU, GEU, LTU, LEU }}, ! 2436: ! 2437: ! 2438: /* If defined, a C statement to be executed just prior to the ! 2439: output of assembler code for INSN, to modify the extracted ! 2440: operands so they will be output differently. ! 2441: ! 2442: Here the argument OPVEC is the vector containing the operands ! 2443: extracted from INSN, and NOPERANDS is the number of elements of ! 2444: the vector which contain meaningful data for this insn. The ! 2445: contents of this vector are what will be used to convert the ! 2446: insn template into assembler code, so you can change the ! 2447: assembler output by changing the contents of the vector. ! 2448: ! 2449: We use it to check if the current insn needs a nop in front of it ! 2450: because of load delays, and also to update the delay slot ! 2451: statistics. */ ! 2452: ! 2453: #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ ! 2454: do \ ! 2455: { \ ! 2456: if (dslots_number_nops > 0 && mips_load_reg != (rtx)0) \ ! 2457: { \ ! 2458: enum machine_mode mode = GET_MODE (mips_load_reg); \ ! 2459: rtx pattern = PATTERN (INSN); \ ! 2460: \ ! 2461: if (reg_mentioned_p (mips_load_reg, pattern) \ ! 2462: || (mips_load_reg2 != (rtx)0 \ ! 2463: && reg_mentioned_p (mips_load_reg2, pattern)) \ ! 2464: || (mips_load_reg3 != (rtx)0 \ ! 2465: && reg_mentioned_p (mips_load_reg3, pattern)) \ ! 2466: || (mips_load_reg4 != (rtx)0 \ ! 2467: && reg_mentioned_p (mips_load_reg4, pattern)) \ ! 2468: || get_attr_length (INSN) == 0) \ ! 2469: { \ ! 2470: fputs ((set_noreorder) ? "\tnop\n" : "\t#nop\n", asm_out_file); \ ! 2471: } \ ! 2472: else \ ! 2473: dslots_load_filled++; \ ! 2474: \ ! 2475: while (--dslots_number_nops > 0) \ ! 2476: fputs ((set_noreorder) ? "\tnop\n" : "\t#nop\n", asm_out_file); \ ! 2477: \ ! 2478: mips_load_reg = (rtx)0; \ ! 2479: mips_load_reg2 = (rtx)0; \ ! 2480: mips_load_reg3 = (rtx)0; \ ! 2481: mips_load_reg4 = (rtx)0; \ ! 2482: \ ! 2483: if (set_noreorder && --set_noreorder == 0) \ ! 2484: fputs ("\t.set\treorder\n", asm_out_file); \ ! 2485: } \ ! 2486: \ ! 2487: if (TARGET_STATS) \ ! 2488: { \ ! 2489: enum rtx_code code = GET_CODE (INSN); \ ! 2490: if (code == JUMP_INSN || code == CALL_INSN) \ ! 2491: dslots_jump_total++; \ ! 2492: } \ ! 2493: } \ ! 2494: while (0) ! 2495: ! 2496: ! 2497: /* Tell final.c how to eliminate redundant test instructions. ! 2498: Here we define machine-dependent flags and fields in cc_status ! 2499: (see `conditions.h'). */ ! 2500: ! 2501: /* A C compound statement to set the components of `cc_status' ! 2502: appropriately for an insn INSN whose body is EXP. It is this ! 2503: macro's responsibility to recognize insns that set the condition ! 2504: code as a byproduct of other activity as well as those that ! 2505: explicitly set `(cc0)'. ! 2506: ! 2507: This macro is not used on machines that do not use `cc0'. */ ! 2508: ! 2509: #define NOTICE_UPDATE_CC(EXP, INSN) \ ! 2510: do \ ! 2511: { \ ! 2512: enum attr_type type = get_attr_type (INSN); \ ! 2513: if (type == TYPE_ICMP || type == TYPE_FCMP) \ ! 2514: CC_STATUS_INIT; \ ! 2515: } \ ! 2516: while (0) ! 2517: ! 2518: /* A list of names to be used for additional modes for condition ! 2519: code values in registers (*note Jump Patterns::.). These names ! 2520: are added to `enum machine_mode' and all have class `MODE_CC'. ! 2521: By convention, they should start with `CC' and end with `mode'. ! 2522: ! 2523: You should only define this macro if your machine does not use ! 2524: `cc0' and only if additional modes are required. ! 2525: ! 2526: On the MIPS, we use CC_FPmode for all floating point, CC_EQmode for ! 2527: integer equality/inequality comparisons, CC_0mode for comparisons ! 2528: against 0, and CCmode for other integer comparisons. */ ! 2529: ! 2530: #define EXTRA_CC_MODES CC_EQmode, CC_FPmode, CC_0mode ! 2531: ! 2532: /* A list of C strings giving the names for the modes listed in ! 2533: `EXTRA_CC_MODES'. For example, the Sparc defines this macro and ! 2534: `EXTRA_CC_MODES' as ! 2535: ! 2536: #define EXTRA_CC_MODES CC_NOOVmode, CCFPmode ! 2537: #define EXTRA_CC_NAMES "CC_NOOV", "CCFP" ! 2538: ! 2539: This macro is not required if `EXTRA_CC_MODES' is not defined. */ ! 2540: ! 2541: #define EXTRA_CC_NAMES "CC_EQ", "CC_FP", "CC_0" ! 2542: ! 2543: /* Returns a mode from class `MODE_CC' to be used when comparison ! 2544: operation code OP is applied to rtx X. For example, on the ! 2545: Sparc, `SELECT_CC_MODE' is defined as (see *note Jump ! 2546: Patterns::. for a description of the reason for this definition) ! 2547: ! 2548: #define SELECT_CC_MODE(OP,X) \ ! 2549: (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CCFPmode \ ! 2550: : (GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \ ! 2551: || GET_CODE (X) == NEG) \ ! 2552: ? CC_NOOVmode : CCmode) ! 2553: ! 2554: This macro is not required if `EXTRA_CC_MODES' is not defined. */ ! 2555: ! 2556: #define SELECT_CC_MODE (OP, X) \ ! 2557: (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT ? CC_FPmode : \ ! 2558: (OP == EQ || OP == NE) ? CC_EQmode : CCmode) ! 2559: ! 2560: ! 2561: /* Control the assembler format that we output. */ ! 2562: ! 2563: /* Output at beginning of assembler file. ! 2564: If we are optimizing to use the global pointer, create a temporary ! 2565: file to hold all of the text stuff, and write it out to the end. ! 2566: This is needed because the MIPS assembler is evidently one pass, ! 2567: and if it hasn't seen the relevant .comm/.lcomm/.extern/.sdata ! 2568: declaration when the code is processed, it generates a two ! 2569: instruction sequence. */ ! 2570: ! 2571: #define ASM_FILE_START(STREAM) mips_asm_file_start (STREAM) ! 2572: ! 2573: /* Output to assembler file text saying following lines ! 2574: may contain character constants, extra white space, comments, etc. */ ! 2575: ! 2576: #define ASM_APP_ON " #APP\n" ! 2577: ! 2578: /* Output to assembler file text saying following lines ! 2579: no longer contain unusual constructs. */ ! 2580: ! 2581: #define ASM_APP_OFF " #NO_APP\n" ! 2582: ! 2583: /* How to refer to registers in assembler output. ! 2584: This sequence is indexed by compiler's hard-register-number (see above). ! 2585: ! 2586: In order to support the two different conventions for register names, ! 2587: we use the name of a table set up in mips.c, which is overwritten ! 2588: if -mrnames is used. */ ! 2589: ! 2590: #define REGISTER_NAMES \ ! 2591: { \ ! 2592: &mips_reg_names[ 0][0], \ ! 2593: &mips_reg_names[ 1][0], \ ! 2594: &mips_reg_names[ 2][0], \ ! 2595: &mips_reg_names[ 3][0], \ ! 2596: &mips_reg_names[ 4][0], \ ! 2597: &mips_reg_names[ 5][0], \ ! 2598: &mips_reg_names[ 6][0], \ ! 2599: &mips_reg_names[ 7][0], \ ! 2600: &mips_reg_names[ 8][0], \ ! 2601: &mips_reg_names[ 9][0], \ ! 2602: &mips_reg_names[10][0], \ ! 2603: &mips_reg_names[11][0], \ ! 2604: &mips_reg_names[12][0], \ ! 2605: &mips_reg_names[13][0], \ ! 2606: &mips_reg_names[14][0], \ ! 2607: &mips_reg_names[15][0], \ ! 2608: &mips_reg_names[16][0], \ ! 2609: &mips_reg_names[17][0], \ ! 2610: &mips_reg_names[18][0], \ ! 2611: &mips_reg_names[19][0], \ ! 2612: &mips_reg_names[20][0], \ ! 2613: &mips_reg_names[21][0], \ ! 2614: &mips_reg_names[22][0], \ ! 2615: &mips_reg_names[23][0], \ ! 2616: &mips_reg_names[24][0], \ ! 2617: &mips_reg_names[25][0], \ ! 2618: &mips_reg_names[26][0], \ ! 2619: &mips_reg_names[27][0], \ ! 2620: &mips_reg_names[28][0], \ ! 2621: &mips_reg_names[29][0], \ ! 2622: &mips_reg_names[30][0], \ ! 2623: &mips_reg_names[31][0], \ ! 2624: &mips_reg_names[32][0], \ ! 2625: &mips_reg_names[33][0], \ ! 2626: &mips_reg_names[34][0], \ ! 2627: &mips_reg_names[35][0], \ ! 2628: &mips_reg_names[36][0], \ ! 2629: &mips_reg_names[37][0], \ ! 2630: &mips_reg_names[38][0], \ ! 2631: &mips_reg_names[39][0], \ ! 2632: &mips_reg_names[40][0], \ ! 2633: &mips_reg_names[41][0], \ ! 2634: &mips_reg_names[42][0], \ ! 2635: &mips_reg_names[43][0], \ ! 2636: &mips_reg_names[44][0], \ ! 2637: &mips_reg_names[45][0], \ ! 2638: &mips_reg_names[46][0], \ ! 2639: &mips_reg_names[47][0], \ ! 2640: &mips_reg_names[48][0], \ ! 2641: &mips_reg_names[49][0], \ ! 2642: &mips_reg_names[50][0], \ ! 2643: &mips_reg_names[51][0], \ ! 2644: &mips_reg_names[52][0], \ ! 2645: &mips_reg_names[53][0], \ ! 2646: &mips_reg_names[54][0], \ ! 2647: &mips_reg_names[55][0], \ ! 2648: &mips_reg_names[56][0], \ ! 2649: &mips_reg_names[57][0], \ ! 2650: &mips_reg_names[58][0], \ ! 2651: &mips_reg_names[59][0], \ ! 2652: &mips_reg_names[60][0], \ ! 2653: &mips_reg_names[61][0], \ ! 2654: &mips_reg_names[62][0], \ ! 2655: &mips_reg_names[63][0], \ ! 2656: &mips_reg_names[64][0], \ ! 2657: &mips_reg_names[65][0], \ ! 2658: &mips_reg_names[66][0], \ ! 2659: } ! 2660: ! 2661: /* If defined, a C initializer for an array of structures ! 2662: containing a name and a register number. This macro defines ! 2663: additional names for hard registers, thus allowing the `asm' ! 2664: option in declarations to refer to registers using alternate ! 2665: names. ! 2666: ! 2667: We define both names for the integer registers here. */ ! 2668: ! 2669: #define ADDITIONAL_REGISTER_NAMES \ ! 2670: { \ ! 2671: { "$0", 0 + GP_REG_FIRST }, \ ! 2672: { "$1", 1 + GP_REG_FIRST }, \ ! 2673: { "$2", 2 + GP_REG_FIRST }, \ ! 2674: { "$3", 3 + GP_REG_FIRST }, \ ! 2675: { "$4", 4 + GP_REG_FIRST }, \ ! 2676: { "$5", 5 + GP_REG_FIRST }, \ ! 2677: { "$6", 6 + GP_REG_FIRST }, \ ! 2678: { "$7", 7 + GP_REG_FIRST }, \ ! 2679: { "$8", 8 + GP_REG_FIRST }, \ ! 2680: { "$9", 9 + GP_REG_FIRST }, \ ! 2681: { "$10", 10 + GP_REG_FIRST }, \ ! 2682: { "$11", 11 + GP_REG_FIRST }, \ ! 2683: { "$12", 12 + GP_REG_FIRST }, \ ! 2684: { "$13", 13 + GP_REG_FIRST }, \ ! 2685: { "$14", 14 + GP_REG_FIRST }, \ ! 2686: { "$15", 15 + GP_REG_FIRST }, \ ! 2687: { "$16", 16 + GP_REG_FIRST }, \ ! 2688: { "$17", 17 + GP_REG_FIRST }, \ ! 2689: { "$18", 18 + GP_REG_FIRST }, \ ! 2690: { "$19", 19 + GP_REG_FIRST }, \ ! 2691: { "$20", 20 + GP_REG_FIRST }, \ ! 2692: { "$21", 21 + GP_REG_FIRST }, \ ! 2693: { "$22", 22 + GP_REG_FIRST }, \ ! 2694: { "$23", 23 + GP_REG_FIRST }, \ ! 2695: { "$24", 24 + GP_REG_FIRST }, \ ! 2696: { "$25", 25 + GP_REG_FIRST }, \ ! 2697: { "$26", 26 + GP_REG_FIRST }, \ ! 2698: { "$27", 27 + GP_REG_FIRST }, \ ! 2699: { "$28", 28 + GP_REG_FIRST }, \ ! 2700: { "$29", 29 + GP_REG_FIRST }, \ ! 2701: { "$30", 30 + GP_REG_FIRST }, \ ! 2702: { "$31", 31 + GP_REG_FIRST }, \ ! 2703: { "$sp", 29 + GP_REG_FIRST }, \ ! 2704: { "$fp", 30 + GP_REG_FIRST }, \ ! 2705: { "at", 1 + GP_REG_FIRST }, \ ! 2706: { "v0", 2 + GP_REG_FIRST }, \ ! 2707: { "v1", 3 + GP_REG_FIRST }, \ ! 2708: { "a0", 4 + GP_REG_FIRST }, \ ! 2709: { "a1", 5 + GP_REG_FIRST }, \ ! 2710: { "a2", 6 + GP_REG_FIRST }, \ ! 2711: { "a3", 7 + GP_REG_FIRST }, \ ! 2712: { "t0", 8 + GP_REG_FIRST }, \ ! 2713: { "t1", 9 + GP_REG_FIRST }, \ ! 2714: { "t2", 10 + GP_REG_FIRST }, \ ! 2715: { "t3", 11 + GP_REG_FIRST }, \ ! 2716: { "t4", 12 + GP_REG_FIRST }, \ ! 2717: { "t5", 13 + GP_REG_FIRST }, \ ! 2718: { "t6", 14 + GP_REG_FIRST }, \ ! 2719: { "t7", 15 + GP_REG_FIRST }, \ ! 2720: { "s0", 16 + GP_REG_FIRST }, \ ! 2721: { "s1", 17 + GP_REG_FIRST }, \ ! 2722: { "s2", 18 + GP_REG_FIRST }, \ ! 2723: { "s3", 19 + GP_REG_FIRST }, \ ! 2724: { "s4", 20 + GP_REG_FIRST }, \ ! 2725: { "s5", 21 + GP_REG_FIRST }, \ ! 2726: { "s6", 22 + GP_REG_FIRST }, \ ! 2727: { "s7", 23 + GP_REG_FIRST }, \ ! 2728: { "t8", 24 + GP_REG_FIRST }, \ ! 2729: { "t9", 25 + GP_REG_FIRST }, \ ! 2730: { "k0", 26 + GP_REG_FIRST }, \ ! 2731: { "k1", 27 + GP_REG_FIRST }, \ ! 2732: { "gp", 28 + GP_REG_FIRST }, \ ! 2733: { "sp", 29 + GP_REG_FIRST }, \ ! 2734: { "fp", 30 + GP_REG_FIRST }, \ ! 2735: { "ra", 31 + GP_REG_FIRST }, \ ! 2736: } ! 2737: ! 2738: /* Define results of standard character escape sequences. */ ! 2739: #define TARGET_BELL 007 ! 2740: #define TARGET_BS 010 ! 2741: #define TARGET_TAB 011 ! 2742: #define TARGET_NEWLINE 012 ! 2743: #define TARGET_VT 013 ! 2744: #define TARGET_FF 014 ! 2745: #define TARGET_CR 015 ! 2746: ! 2747: /* A C compound statement to output to stdio stream STREAM the ! 2748: assembler syntax for an instruction operand X. X is an RTL ! 2749: expression. ! 2750: ! 2751: CODE is a value that can be used to specify one of several ways ! 2752: of printing the operand. It is used when identical operands ! 2753: must be printed differently depending on the context. CODE ! 2754: comes from the `%' specification that was used to request ! 2755: printing of the operand. If the specification was just `%DIGIT' ! 2756: then CODE is 0; if the specification was `%LTR DIGIT' then CODE ! 2757: is the ASCII code for LTR. ! 2758: ! 2759: If X is a register, this macro should print the register's name. ! 2760: The names can be found in an array `reg_names' whose type is ! 2761: `char *[]'. `reg_names' is initialized from `REGISTER_NAMES'. ! 2762: ! 2763: When the machine description has a specification `%PUNCT' (a `%' ! 2764: followed by a punctuation character), this macro is called with ! 2765: a null pointer for X and the punctuation character for CODE. ! 2766: ! 2767: See mips.c for the MIPS specific codes. */ ! 2768: ! 2769: #define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) ! 2770: ! 2771: /* A C expression which evaluates to true if CODE is a valid ! 2772: punctuation character for use in the `PRINT_OPERAND' macro. If ! 2773: `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no ! 2774: punctuation characters (except for the standard one, `%') are ! 2775: used in this way. */ ! 2776: ! 2777: #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE] ! 2778: ! 2779: /* A C compound statement to output to stdio stream STREAM the ! 2780: assembler syntax for an instruction operand that is a memory ! 2781: reference whose address is ADDR. ADDR is an RTL expression. ! 2782: ! 2783: On some machines, the syntax for a symbolic address depends on ! 2784: the section that the address refers to. On these machines, ! 2785: define the macro `ENCODE_SECTION_INFO' to store the information ! 2786: into the `symbol_ref', and then check for it here. */ ! 2787: ! 2788: #define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) ! 2789: ! 2790: ! 2791: /* A C statement, to be executed after all slot-filler instructions ! 2792: have been output. If necessary, call `dbr_sequence_length' to ! 2793: determine the number of slots filled in a sequence (zero if not ! 2794: currently outputting a sequence), to decide how many no-ops to ! 2795: output, or whatever. ! 2796: ! 2797: Don't define this macro if it has nothing to do, but it is ! 2798: helpful in reading assembly output if the extent of the delay ! 2799: sequence is made explicit (e.g. with white space). ! 2800: ! 2801: Note that output routines for instructions with delay slots must ! 2802: be prepared to deal with not being output as part of a sequence ! 2803: (i.e. when the scheduling pass is not run, or when no slot ! 2804: fillers could be found.) The variable `final_sequence' is null ! 2805: when not processing a sequence, otherwise it contains the ! 2806: `sequence' rtx being output. */ ! 2807: ! 2808: #define DBR_OUTPUT_SEQEND(STREAM) \ ! 2809: do \ ! 2810: { \ ! 2811: if (set_nomacro > 0 && --set_nomacro == 0) \ ! 2812: fputs ("\t.set\tmacro\n", STREAM); \ ! 2813: \ ! 2814: if (set_noreorder > 0 && --set_noreorder == 0) \ ! 2815: fputs ("\t.set\treorder\n", STREAM); \ ! 2816: \ ! 2817: dslots_jump_filled++; \ ! 2818: fputs ("\n", STREAM); \ ! 2819: } \ ! 2820: while (0) ! 2821: ! 2822: ! 2823: /* How to tell the debugger about changes of source files. Note, the ! 2824: mips ECOFF format cannot deal with changes of files inside of ! 2825: functions, which means the output of parser generators like bison ! 2826: is generally not debuggable without using the -l switch. Lose, ! 2827: lose, lose. Silicon graphics seems to want all .file's hardwired ! 2828: to 1. */ ! 2829: ! 2830: #ifndef SET_FILE_NUMBER ! 2831: #define SET_FILE_NUMBER() ++num_source_filenames ! 2832: #endif ! 2833: ! 2834: #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ ! 2835: mips_output_filename (STREAM, NAME) ! 2836: ! 2837: /* This is how to output a note the debugger telling it the line number ! 2838: to which the following sequence of instructions corresponds. ! 2839: Silicon graphics puts a label after each .loc. */ ! 2840: ! 2841: #ifndef LABEL_AFTER_LOC ! 2842: #define LABEL_AFTER_LOC(STREAM) ! 2843: #endif ! 2844: ! 2845: #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \ ! 2846: mips_output_lineno (STREAM, LINE) ! 2847: ! 2848: /* The MIPS implementation uses some labels for it's own purposed. The ! 2849: following lists what labels are created, and are all formed by the ! 2850: pattern $L[a-z].*. The machine independent portion of GCC creates ! 2851: labels matching: $L[A-Z][0-9]+ and $L[0-9]+. ! 2852: ! 2853: LM[0-9]+ Sillicon graphics/ECOFF stabs label before each stmt. ! 2854: $Lb[0-9]+ Begin blocks for MIPS debug support ! 2855: $Lc[0-9]+ Label for use in s<xx> operation. ! 2856: $Le[0-9]+ End blocks for MIPS debug support ! 2857: $Lp\..+ Half-pic labels. ! 2858: $Ls[0-9]+ FP-SP difference if -fomit-frame-pointer */ ! 2859: ! 2860: /* This is how to output the definition of a user-level label named NAME, ! 2861: such as the label on a static function or variable NAME. ! 2862: ! 2863: If we are optimizing the gp, remember that this label has been put ! 2864: out, so we know not to emit an .extern for it in mips_asm_file_end. ! 2865: We use one of the common bits in the IDENTIFIER tree node for this, ! 2866: since those bits seem to be unused, and we don't have any method ! 2867: of getting the decl nodes from the name. */ ! 2868: ! 2869: #ifndef COLLECT ! 2870: #define ASM_OUTPUT_LABEL(STREAM,NAME) \ ! 2871: do { \ ! 2872: assemble_name (STREAM, NAME); \ ! 2873: fputs (":\n", STREAM); \ ! 2874: \ ! 2875: if (TARGET_GP_OPT && mips_section_threshold != 0) \ ! 2876: { \ ! 2877: tree name_tree = get_identifier (NAME); \ ! 2878: TREE_ADDRESSABLE (name_tree) = 1; \ ! 2879: } \ ! 2880: } while (0) ! 2881: ! 2882: #else ! 2883: #define ASM_OUTPUT_LABEL(STREAM,NAME) \ ! 2884: do { \ ! 2885: fprintf (STREAM, "%s:\n", NAME); \ ! 2886: } while (0) ! 2887: #endif ! 2888: ! 2889: /* This is how to output a command to make the user-level label named NAME ! 2890: defined for reference from other files. */ ! 2891: ! 2892: #ifndef COLLECT ! 2893: #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \ ! 2894: do { \ ! 2895: fputs ("\t.globl\t", STREAM); \ ! 2896: assemble_name (STREAM, NAME); \ ! 2897: fputs ("\n", STREAM); \ ! 2898: } while (0) ! 2899: ! 2900: #else ! 2901: #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \ ! 2902: do { \ ! 2903: fprintf (STREAM, "\t.globl\t%s\n", NAME); \ ! 2904: } while (0) ! 2905: #endif ! 2906: ! 2907: /* This says how to output an assembler line ! 2908: to define a global common symbol. */ ! 2909: ! 2910: #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ ! 2911: do { \ ! 2912: fputs ("\n\t.comm\t", (STREAM)); \ ! 2913: assemble_name ((STREAM), (NAME)); \ ! 2914: fprintf ((STREAM), ",%u\n", (ROUNDED)); \ ! 2915: \ ! 2916: if (TARGET_GP_OPT && mips_section_threshold != 0) \ ! 2917: { \ ! 2918: tree name_tree = get_identifier (NAME); \ ! 2919: TREE_ADDRESSABLE (name_tree) = 1; \ ! 2920: } \ ! 2921: } while (0) ! 2922: ! 2923: /* This says how to output an assembler line ! 2924: to define a local common symbol. */ ! 2925: ! 2926: #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \ ! 2927: do { \ ! 2928: fputs ("\n\t.lcomm\t", (STREAM)); \ ! 2929: assemble_name ((STREAM), (NAME)); \ ! 2930: fprintf ((STREAM), ",%u\n", (ROUNDED)); \ ! 2931: \ ! 2932: if (TARGET_GP_OPT && mips_section_threshold != 0) \ ! 2933: { \ ! 2934: tree name_tree = get_identifier (NAME); \ ! 2935: TREE_ADDRESSABLE (name_tree) = 1; \ ! 2936: } \ ! 2937: } while (0) ! 2938: ! 2939: ! 2940: /* This says how to output an external. It would be possible not to ! 2941: output anything and let undefined symbol become external. However ! 2942: the assembler uses length information on externals to allocate in ! 2943: data/sdata bss/sbss, thereby saving exec time. */ ! 2944: ! 2945: #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \ ! 2946: mips_output_external(STREAM,DECL,NAME) ! 2947: ! 2948: /* This says what to print at the end of the assembly file */ ! 2949: #define ASM_FILE_END(STREAM) mips_asm_file_end(STREAM) ! 2950: ! 2951: ! 2952: /* This is how to declare a function name. The actual work of ! 2953: emitting the label is moved to function_prologue, so that we can ! 2954: get the line number correctly emitted before the .ent directive, ! 2955: and after any .file directives. ! 2956: ! 2957: Also, switch files if we are optimizing the global pointer. */ ! 2958: ! 2959: #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \ ! 2960: { \ ! 2961: extern FILE *asm_out_text_file; \ ! 2962: if (TARGET_GP_OPT) \ ! 2963: STREAM = asm_out_text_file; \ ! 2964: \ ! 2965: current_function_name = NAME; \ ! 2966: } ! 2967: ! 2968: /* This is how to output a reference to a user-level label named NAME. ! 2969: `assemble_name' uses this. */ ! 2970: ! 2971: #define ASM_OUTPUT_LABELREF(STREAM,NAME) fprintf (STREAM, "%s", NAME) ! 2972: ! 2973: /* This is how to output an internal numbered label where ! 2974: PREFIX is the class of label and NUM is the number within the class. */ ! 2975: ! 2976: #define ASM_OUTPUT_INTERNAL_LABEL(STREAM,PREFIX,NUM) \ ! 2977: fprintf (STREAM, "$%s%d:\n", PREFIX, NUM) ! 2978: ! 2979: /* This is how to store into the string LABEL ! 2980: the symbol_ref name of an internal numbered label where ! 2981: PREFIX is the class of label and NUM is the number within the class. ! 2982: This is suitable for output with `assemble_name'. */ ! 2983: ! 2984: #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ ! 2985: sprintf (LABEL, "*$%s%d", PREFIX, NUM) ! 2986: ! 2987: /* This is how to output an assembler line defining a `double' constant. */ ! 2988: ! 2989: #define ASM_OUTPUT_DOUBLE(STREAM,VALUE) \ ! 2990: { \ ! 2991: union { double d; long l[2]; } u2; \ ! 2992: u2.d = VALUE; \ ! 2993: fprintf (STREAM, "\t.word\t0x%08lx\t\t# %.20g\n\t.word\t0x%08lx\n", \ ! 2994: u2.l[0], u2.d, u2.l[1]); \ ! 2995: } ! 2996: ! 2997: /* This is how to output an assembler line defining a `float' constant. */ ! 2998: ! 2999: #define ASM_OUTPUT_FLOAT(STREAM,VALUE) \ ! 3000: { \ ! 3001: union { float f; long l; } u2; \ ! 3002: u2.f = VALUE; \ ! 3003: fprintf (STREAM, "\t.word\t0x%08lx\t\t# %.12g\n", u2.l, u2.f); \ ! 3004: } ! 3005: ! 3006: /* This is how to output an assembler line defining an `int' constant. */ ! 3007: ! 3008: #ifndef COLLECT ! 3009: #define ASM_OUTPUT_INT(STREAM,VALUE) \ ! 3010: do { \ ! 3011: fprintf (STREAM, "\t.word\t"); \ ! 3012: output_addr_const (STREAM, (VALUE)); \ ! 3013: fprintf (STREAM, "\n"); \ ! 3014: } while (0) ! 3015: ! 3016: #else ! 3017: #define ASM_OUTPUT_INT(STREAM,VALUE) \ ! 3018: fprintf (STREAM, "\t.word\t%d\n", VALUE) ! 3019: #endif ! 3020: ! 3021: /* Likewise for `char' and `short' constants. */ ! 3022: ! 3023: #define ASM_OUTPUT_SHORT(STREAM,VALUE) \ ! 3024: { \ ! 3025: fprintf (STREAM, "\t.half\t"); \ ! 3026: output_addr_const (STREAM, (VALUE)); \ ! 3027: fprintf (STREAM, "\n"); \ ! 3028: } ! 3029: ! 3030: #define ASM_OUTPUT_CHAR(STREAM,VALUE) \ ! 3031: { \ ! 3032: fprintf (STREAM, "\t.byte\t"); \ ! 3033: output_addr_const (STREAM, (VALUE)); \ ! 3034: fprintf (STREAM, "\n"); \ ! 3035: } ! 3036: ! 3037: /* This is how to output an assembler line defining an `int' constant, ! 3038: which is not in tree format (for collect.c). */ ! 3039: ! 3040: #define ASM_OUTPUT_INT_CONST(STREAM,VALUE) \ ! 3041: fprintf(STREAM, "\t.word\t%d\n", VALUE) ! 3042: ! 3043: /* This is how to output an assembler line defining an external/static ! 3044: address which is not in tree format (for collect.c). */ ! 3045: ! 3046: #define ASM_OUTPUT_PTR_INT_SUM(STREAM, NAME, VALUE) \ ! 3047: do { \ ! 3048: fprintf (STREAM, "\t.word\t"); \ ! 3049: ASM_OUTPUT_LABELREF (STREAM, NAME); \ ! 3050: fprintf (STREAM, "+%d\n", VALUE); \ ! 3051: } while (0) ! 3052: ! 3053: #define ASM_OUTPUT_LABELREF_AS_INT(STREAM, NAME) \ ! 3054: do { \ ! 3055: fprintf (STREAM, "\t.word\t"); \ ! 3056: ASM_OUTPUT_LABELREF (STREAM, NAME); \ ! 3057: fprintf (STREAM, "\n"); \ ! 3058: } while (0) ! 3059: ! 3060: /* This is how to output an assembler line for a numeric constant byte. */ ! 3061: ! 3062: #define ASM_OUTPUT_BYTE(STREAM,VALUE) \ ! 3063: fprintf (STREAM, "\t.byte\t0x%x\n", (VALUE)) ! 3064: ! 3065: /* This is how to output an element of a case-vector that is absolute. */ ! 3066: ! 3067: #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ ! 3068: fprintf (STREAM, "\t.word\t$L%d\n", VALUE) ! 3069: ! 3070: /* This is how to output an element of a case-vector that is relative. ! 3071: (We do not use such vectors, ! 3072: but we must define this macro anyway.) */ ! 3073: ! 3074: #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, VALUE, REL) \ ! 3075: fprintf (STREAM, "\t.word\t$L%d-$L%d\n", VALUE, REL) ! 3076: ! 3077: /* This is how to emit the initial label for switch statements. We ! 3078: need to put the switch labels somewhere else from the text section, ! 3079: because the MIPS assembler gets real confused about line numbers if ! 3080: .word's appear in the text section. */ ! 3081: ! 3082: #define ASM_OUTPUT_CASE_LABEL(STREAM, PREFIX, NUM, JUMPTABLE) \ ! 3083: { \ ! 3084: rdata_section (); \ ! 3085: ASM_OUTPUT_ALIGN (STREAM, 2); \ ! 3086: ASM_OUTPUT_INTERNAL_LABEL (STREAM, PREFIX, NUM); \ ! 3087: } ! 3088: ! 3089: /* This is how to output an assembler line ! 3090: that says to advance the location counter ! 3091: to a multiple of 2**LOG bytes. */ ! 3092: ! 3093: #define ASM_OUTPUT_ALIGN(STREAM,LOG) \ ! 3094: { \ ! 3095: int mask = (1 << (LOG)) - 1; \ ! 3096: fprintf (STREAM, "\t.align\t%d\n", (LOG)); \ ! 3097: } ! 3098: ! 3099: /* This is how to output an assembler line to to advance the location ! 3100: counter by SIZE bytes. */ ! 3101: ! 3102: #define ASM_OUTPUT_SKIP(STREAM,SIZE) \ ! 3103: fprintf (STREAM, "\t.space\t%u\n", (SIZE)) ! 3104: ! 3105: ! 3106: /* This is how to output a string. */ ! 3107: #define ASM_OUTPUT_ASCII(STREAM, STRING, LEN) \ ! 3108: do { \ ! 3109: register int i, c, len = (LEN), cur_pos = 17; \ ! 3110: register unsigned char *string = (unsigned char *)(STRING); \ ! 3111: fprintf ((STREAM), "\t.ascii\t\""); \ ! 3112: for (i = 0; i < len; i++) \ ! 3113: { \ ! 3114: register int c = string[i]; \ ! 3115: \ ! 3116: switch (c) \ ! 3117: { \ ! 3118: case '\"': \ ! 3119: case '\\': \ ! 3120: putc ('\\', (STREAM)); \ ! 3121: putc (c, (STREAM)); \ ! 3122: cur_pos += 2; \ ! 3123: break; \ ! 3124: \ ! 3125: case TARGET_NEWLINE: \ ! 3126: fputs ("\\n", (STREAM)); \ ! 3127: if (i+1 < len \ ! 3128: && (((c = string[i+1]) >= '\040' && c <= '~') \ ! 3129: || c == TARGET_TAB)) \ ! 3130: cur_pos = 32767; /* break right here */ \ ! 3131: else \ ! 3132: cur_pos += 2; \ ! 3133: break; \ ! 3134: \ ! 3135: case TARGET_TAB: \ ! 3136: fputs ("\\t", (STREAM)); \ ! 3137: cur_pos += 2; \ ! 3138: break; \ ! 3139: \ ! 3140: case TARGET_FF: \ ! 3141: fputs ("\\f", (STREAM)); \ ! 3142: cur_pos += 2; \ ! 3143: break; \ ! 3144: \ ! 3145: case TARGET_BS: \ ! 3146: fputs ("\\b", (STREAM)); \ ! 3147: cur_pos += 2; \ ! 3148: break; \ ! 3149: \ ! 3150: case TARGET_CR: \ ! 3151: fputs ("\\r", (STREAM)); \ ! 3152: cur_pos += 2; \ ! 3153: break; \ ! 3154: \ ! 3155: default: \ ! 3156: if (c >= ' ' && c < 0177) \ ! 3157: { \ ! 3158: putc (c, (STREAM)); \ ! 3159: cur_pos++; \ ! 3160: } \ ! 3161: else \ ! 3162: { \ ! 3163: fprintf ((STREAM), "\\%03o", c); \ ! 3164: cur_pos += 4; \ ! 3165: } \ ! 3166: } \ ! 3167: \ ! 3168: if (cur_pos > 72 && i+1 < len) \ ! 3169: { \ ! 3170: cur_pos = 17; \ ! 3171: fprintf ((STREAM), "\"\n\t.ascii\t\""); \ ! 3172: } \ ! 3173: } \ ! 3174: fprintf ((STREAM), "\"\n"); \ ! 3175: } while (0) ! 3176: ! 3177: /* Handle certain cpp directives used in header files on sysV. */ ! 3178: #define SCCS_DIRECTIVE ! 3179: ! 3180: /* Output #ident as a in the read-only data section. */ ! 3181: #define ASM_OUTPUT_IDENT(FILE, STRING) \ ! 3182: { \ ! 3183: char *p = STRING; \ ! 3184: int size = strlen (p) + 1; \ ! 3185: rdata_section (); \ ! 3186: assemble_string (p, size); \ ! 3187: } ! 3188: ! 3189: ! 3190: /* Output before read-only data. */ ! 3191: ! 3192: #define TEXT_SECTION_ASM_OP "\t.text" ! 3193: ! 3194: /* Output before writable data. */ ! 3195: ! 3196: #define DATA_SECTION_ASM_OP "\t.data" ! 3197: ! 3198: /* Output before writable short data. */ ! 3199: ! 3200: #define SDATA_SECTION_ASM_OP "\t.sdata" ! 3201: ! 3202: /* Output before read-only data. */ ! 3203: ! 3204: #define RDATA_SECTION_ASM_OP "\t.rdata" ! 3205: #define READONLY_DATA_SECTION rdata_section ! 3206: ! 3207: /* What other sections we support other than the normal .data/.text. */ ! 3208: ! 3209: #define EXTRA_SECTIONS in_sdata, in_rdata, in_last_p1 ! 3210: ! 3211: /* Define the additional functions to select our additional sections. */ ! 3212: ! 3213: /* on the MIPS it is not a good idea to put constants in the text ! 3214: section, since this defeats the sdata/data mechanism. This is ! 3215: especially true when -O is used. In this case an effort is made to ! 3216: address with faster (gp) register relative addressing, which can ! 3217: only get at sdata and sbss items (there is no stext !!) However, ! 3218: if the constant is too large for sdata, and it's readonly, it ! 3219: will go into the .rdata section. */ ! 3220: ! 3221: #define EXTRA_SECTION_FUNCTIONS \ ! 3222: void \ ! 3223: sdata_section () \ ! 3224: { \ ! 3225: if (in_section != in_sdata) \ ! 3226: { \ ! 3227: fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \ ! 3228: in_section = in_sdata; \ ! 3229: } \ ! 3230: } \ ! 3231: \ ! 3232: void \ ! 3233: rdata_section () \ ! 3234: { \ ! 3235: if (in_section != in_rdata) \ ! 3236: { \ ! 3237: fprintf (asm_out_file, "%s\n", RDATA_SECTION_ASM_OP); \ ! 3238: in_section = in_rdata; \ ! 3239: } \ ! 3240: } ! 3241: ! 3242: /* Given a decl node or constant node, choose the section to output it in ! 3243: and select that section. */ ! 3244: ! 3245: #define SELECT_SECTION_MODE(MODE,RTX) \ ! 3246: { \ ! 3247: extern int mips_section_threshold; \ ! 3248: if ((GET_MODE_SIZE(MODE) / BITS_PER_UNIT) <= mips_section_threshold \ ! 3249: && mips_section_threshold > 0) \ ! 3250: sdata_section (); \ ! 3251: else \ ! 3252: rdata_section (); \ ! 3253: } \ ! 3254: ! 3255: #define SELECT_SECTION(DECL,RELOC) \ ! 3256: { \ ! 3257: extern int mips_section_threshold; \ ! 3258: if (int_size_in_bytes (TREE_TYPE (DECL)) <= mips_section_threshold \ ! 3259: && mips_section_threshold > 0) \ ! 3260: sdata_section (); \ ! 3261: else if (TREE_CODE (DECL) == STRING_CST) \ ! 3262: { \ ! 3263: if (flag_writable_strings) \ ! 3264: data_section (); \ ! 3265: else \ ! 3266: rdata_section (); \ ! 3267: } \ ! 3268: else if (TREE_CODE (DECL) != VAR_DECL) \ ! 3269: rdata_section (); \ ! 3270: else if (!TREE_READONLY (DECL)) \ ! 3271: data_section (); \ ! 3272: else \ ! 3273: rdata_section (); \ ! 3274: } ! 3275: ! 3276: ! 3277: /* Store in OUTPUT a string (made with alloca) containing ! 3278: an assembler-name for a local static variable named NAME. ! 3279: LABELNO is an integer which is different for each call. */ ! 3280: ! 3281: #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ ! 3282: ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ ! 3283: sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) ! 3284: ! 3285: #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \ ! 3286: do \ ! 3287: { \ ! 3288: fprintf (STREAM, "\tsubu\t%s,%s,8\n\tsw\t%s,0(%s)\n", \ ! 3289: reg_names[STACK_POINTER_REGNUM], \ ! 3290: reg_names[STACK_POINTER_REGNUM], \ ! 3291: reg_names[REGNO], \ ! 3292: reg_names[STACK_POINTER_REGNUM]); \ ! 3293: } \ ! 3294: while (0) ! 3295: ! 3296: #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \ ! 3297: do \ ! 3298: { \ ! 3299: if (! set_noreorder) \ ! 3300: fprintf (STREAM, "\t.set\tnoreorder\n"); \ ! 3301: \ ! 3302: dslots_load_total++; \ ! 3303: dslots_load_filled++; \ ! 3304: fprintf (STREAM, "\tlw\t%s,0(%s)\n\taddu\t%s,%s,8\n", \ ! 3305: reg_names[REGNO], \ ! 3306: reg_names[STACK_POINTER_REGNUM], \ ! 3307: reg_names[STACK_POINTER_REGNUM], \ ! 3308: reg_names[STACK_POINTER_REGNUM]); \ ! 3309: \ ! 3310: if (! set_noreorder) \ ! 3311: fprintf (STREAM, "\t.set\treorder\n"); \ ! 3312: } \ ! 3313: while (0) ! 3314: ! 3315: /* Define the parentheses used to group arithmetic operations ! 3316: in assembler code. */ ! 3317: ! 3318: #define ASM_OPEN_PAREN "(" ! 3319: #define ASM_CLOSE_PAREN ")" ! 3320: ! 3321: /* How to start an assembler comment. */ ! 3322: #ifndef ASM_COMMENT_START ! 3323: #define ASM_COMMENT_START "\t\t# " ! 3324: #endif ! 3325: ! 3326: ! 3327: ! 3328: /* Macros for mips-tfile.c to encapsulate stabs in ECOFF, and for ! 3329: and mips-tdump.c to print them out. ! 3330: ! 3331: These must match the corresponding definitions in gdb/mipsread.c. ! 3332: Unfortunately, gcc and gdb do not currently share any directories. */ ! 3333: ! 3334: #define CODE_MASK 0x8F300 ! 3335: #define MIPS_IS_STAB(sym) (((sym)->index & 0xFFF00) == CODE_MASK) ! 3336: #define MIPS_MARK_STAB(code) ((code)+CODE_MASK) ! 3337: #define MIPS_UNMARK_STAB(code) ((code)-CODE_MASK)
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