sysdeps/mips/sys/asm.h

   1 /* Copyright (C) 1997, 1998, 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ralf Baechle <ralf@gnu.org>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _SYS_ASM_H
  21 #define _SYS_ASM_H
  22
  23 #include <sgidefs.h>
  24
  25 #ifndef CAT
  26 # ifdef __STDC__
  27 #  define __CAT(str1,str2) str1##str2
  28 # else
  29 #  define __CAT(str1,str2) str1/**/str2
  30 # endif
  31 # define CAT(str1,str2) __CAT(str1,str2)
  32 #endif
  33
  34 /*
  35  * Macros to handle different pointer/register sizes for 32/64-bit code
  36  *
  37  * 64 bit address space isn't used yet, so we may use the R3000 32 bit
  38  * defines for now.
  39  */
  40 #if (_MIPS_SIM == _MIPS_SIM_ABI32) || (_MIPS_SIM == _MIPS_SIM_NABI32)
  41 # define PTR .word
  42 # define PTRSIZE 4
  43 # define PTRLOG 2
  44 #elif (_MIPS_SIM == _MIPS_SIM_ABI64)
  45 # define PTR .dword
  46 # define PTRSIZE 8
  47 # define PTRLOG 3
  48 #endif
  49
  50 /*
  51  * PIC specific declarations
  52  */
  53 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
  54 # ifdef __PIC__
  55 #  define CPRESTORE(register) \
  56                 .cprestore register
  57 #  define CPLOAD(register) \
  58                 .cpload register
  59 # else
  60 #  define CPRESTORE(register)
  61 #  define CPLOAD(register)
  62 # endif
  63
  64 # define CPADD(register) \
  65                 .cpadd  register
  66
  67 /*
  68  * Set gp when at 1st instruction
  69  */
  70 # define SETUP_GP                                       \
  71                 .set noreorder;                         \
  72                 .cpload $25;                            \
  73                 .set reorder
  74 /* Set gp when not at 1st instruction */
  75 # define SETUP_GPX(r)                                   \
  76                 .set noreorder;                         \
  77                 move r, $31;     /* Save old ra.  */    \
  78                 bal 10f; /* Find addr of cpload.  */    \
  79                 nop;                                    \
  80 10:                                                     \
  81                 .cpload $31;                            \
  82                 move $31, r;                            \
  83                 .set reorder
  84 # define SETUP_GPX_L(r, l)                              \
  85                 .set noreorder;                         \
  86                 move r, $31;     /* Save old ra.  */    \
  87                 bal l;   /* Find addr of cpload.  */    \
  88                 nop;                                    \
  89 l:                                                      \
  90                 .cpload $31;                            \
  91                 move $31, r;                            \
  92                 .set reorder
  93 # define SAVE_GP(x) \
  94                 .cprestore x /* Save gp trigger t9/jalr conversion.      */
  95 # define SETUP_GP64(a, b)
  96 # define SETUP_GPX64(a, b)
  97 # define SETUP_GPX64_L(cp_reg, ra_save, l)
  98 # define RESTORE_GP64
  99 # define USE_ALT_CP(a)
 100 #else /* (_MIPS_SIM == _MIPS_SIM_ABI64) || (_MIPS_SIM == _MIPS_SIM_NABI32) */
 101 /*
 102  * For callee-saved gp calling convention:
 103  */
 104 # define SETUP_GP
 105 # define SETUP_GPX(r)
 106 # define SETUP_GPX_L(r, l)
 107 # define SAVE_GP(x)
 108
 109 # define SETUP_GP64(gpoffset, proc) \
 110                 .cpsetup $25, gpoffset, proc
 111 # define SETUP_GPX64(cp_reg, ra_save)                   \
 112                 move ra_save, $31; /* Save old ra.  */  \
 113                 .set noreorder;                         \
 114                 bal 10f; /* Find addr of .cpsetup.  */  \
 115                 nop;                                    \
 116 10:                                                     \
 117                 .set reorder;                           \
 118                 .cpsetup $31, cp_reg, 10b;              \
 119                 move $31, ra_save
 120 # define SETUP_GPX64_L(cp_reg, ra_save, l)  \
 121                 move ra_save, $31; /* Save old ra.  */  \
 122                 .set noreorder;                         \
 123                 bal l;   /* Find addr of .cpsetup.  */  \
 124                 nop;                                    \
 125 l:                                                      \
 126                 .set reorder;                           \
 127                 .cpsetup $31, cp_reg, l;                \
 128                 move $31, ra_save
 129 # define RESTORE_GP64 \
 130                 .cpreturn
 131 /* Use alternate register for context pointer.  */
 132 # define USE_ALT_CP(reg)        \
 133                 .cplocal reg
 134 #endif /* _MIPS_SIM != _MIPS_SIM_ABI32 */
 135
 136 /*
 137  * Stack Frame Definitions
 138  */
 139 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 140 # define NARGSAVE 4 /* Space for 4 argument registers must be allocated.  */
 141 #endif
 142 #if (_MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32)
 143 # define NARGSAVE 0 /* No caller responsibilities.  */
 144 #endif
 145
 146
 147 /*
 148  * LEAF - declare leaf routine
 149  */
 150 #define LEAF(symbol)                                    \
 151                 .globl  symbol;                         \
 152                 .align  2;                              \
 153                 .type   symbol,@function;               \
 154                 .ent    symbol,0;                       \
 155 symbol:         .frame  sp,0,ra
 156
 157 /*
 158  * NESTED - declare nested routine entry point
 159  */
 160 #define NESTED(symbol, framesize, rpc)                  \
 161                 .globl  symbol;                         \
 162                 .align  2;                              \
 163                 .type   symbol,@function;               \
 164                 .ent    symbol,0;                       \
 165 symbol:         .frame  sp, framesize, rpc
 166
 167 /*
 168  * END - mark end of function
 169  */
 170 #ifndef END
 171 # define END(function)                                   \
 172                 .end    function;                       \
 173                 .size   function,.-function
 174 #endif
 175
 176 /*
 177  * EXPORT - export definition of symbol
 178  */
 179 #define EXPORT(symbol)                                  \
 180                 .globl  symbol;                         \
 181 symbol:
 182
 183 /*
 184  * ABS - export absolute symbol
 185  */
 186 #define ABS(symbol,value)                               \
 187                 .globl  symbol;                         \
 188 symbol          =       value
 189
 190 #define PANIC(msg)                                      \
 191                 .set    push;                           \
 192                 .set    reorder;                        \
 193                 la      a0,8f;                          \
 194                 jal     panic;                          \
 195 9:              b       9b;                             \
 196                 .set    pop;                            \
 197                 TEXT(msg)
 198
 199 /*
 200  * Print formated string
 201  */
 202 #define PRINT(string)                                   \
 203                 .set    push;                           \
 204                 .set    reorder;                        \
 205                 la      a0,8f;                          \
 206                 jal     printk;                         \
 207                 .set    pop;                            \
 208                 TEXT(string)
 209
 210 #define TEXT(msg)                                       \
 211                 .data;                                  \
 212 8:              .asciiz msg;                            \
 213                 .previous;
 214
 215 /*
 216  * Build text tables
 217  */
 218 #define TTABLE(string)                                  \
 219                 .text;                                  \
 220                 .word   1f;                             \
 221                 .previous;                              \
 222                 .data;                                  \
 223 1:              .asciz  string;                         \
 224                 .previous
 225
 226 /*
 227  * MIPS IV pref instruction.
 228  * Use with .set noreorder only!
 229  *
 230  * MIPS IV implementations are free to treat this as a nop.  The R5000
 231  * is one of them.  So we should have an option not to use this instruction.
 232  */
 233 #if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5)
 234 # define PREF(hint,addr)                                 \
 235                 pref    hint,addr
 236 # define PREFX(hint,addr)                                \
 237                 prefx   hint,addr
 238 #else
 239 # define PREF
 240 # define PREFX
 241 #endif
 242
 243 /*
 244  * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs.
 245  */
 246 #if _MIPS_ISA == _MIPS_ISA_MIPS1
 247 # define MOVN(rd,rs,rt)                                 \
 248                 .set    push;                           \
 249                 .set    reorder;                        \
 250                 beqz    rt,9f;                          \
 251                 move    rd,rs;                          \
 252                 .set    pop;                            \
 253 9:
 254 # define MOVZ(rd,rs,rt)                                 \
 255                 .set    push;                           \
 256                 .set    reorder;                        \
 257                 bnez    rt,9f;                          \
 258                 move    rd,rt;                          \
 259                 .set    pop;                            \
 260 9:
 261 #endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */
 262 #if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3)
 263 # define MOVN(rd,rs,rt)                                 \
 264                 .set    push;                           \
 265                 .set    noreorder;                      \
 266                 bnezl   rt,9f;                          \
 267                 move    rd,rs;                          \
 268                 .set    pop;                            \
 269 9:
 270 # define MOVZ(rd,rs,rt)                                 \
 271                 .set    push;                           \
 272                 .set    noreorder;                      \
 273                 beqzl   rt,9f;                          \
 274                 movz    rd,rs;                          \
 275                 .set    pop;                            \
 276 9:
 277 #endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */
 278 #if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5)
 279 # define MOVN(rd,rs,rt)                                 \
 280                 movn    rd,rs,rt
 281 # define MOVZ(rd,rs,rt)                                 \
 282                 movz    rd,rs,rt
 283 #endif /* (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) */
 284
 285 /*
 286  * Stack alignment
 287  */
 288 #if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
 289 # define ALSZ   7
 290 # define ALMASK ~7
 291 #endif
 292 #if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
 293     (_MIPS_ISA == _MIPS_ISA_MIPS5)
 294 # define ALSZ   15
 295 # define ALMASK ~15
 296 #endif
 297
 298 /*
 299  * Size of a register
 300  */
 301 #ifdef __mips64
 302 # define SZREG  8
 303 #else
 304 # define SZREG  4
 305 #endif
 306
 307 /*
 308  * Use the following macros in assemblercode to load/store registers,
 309  * pointers etc.
 310  */
 311 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 312 # define REG_S sw
 313 # define REG_L lw
 314 #else
 315 # define REG_S sd
 316 # define REG_L ld
 317 #endif
 318
 319 /*
 320  * How to add/sub/load/store/shift C int variables.
 321  */
 322 #if (_MIPS_SZINT == 32)
 323 # define INT_ADD        add
 324 # define INT_ADDI       addi
 325 # define INT_ADDU       addu
 326 # define INT_ADDIU      addiu
 327 # define INT_SUB        add
 328 # define INT_SUBI       subi
 329 # define INT_SUBU       subu
 330 # define INT_SUBIU      subu
 331 # define INT_L          lw
 332 # define INT_S          sw
 333 #endif
 334
 335 #if (_MIPS_SZINT == 64)
 336 # define INT_ADD        dadd
 337 # define INT_ADDI       daddi
 338 # define INT_ADDU       daddu
 339 # define INT_ADDIU      daddiu
 340 # define INT_SUB        dadd
 341 # define INT_SUBI       dsubi
 342 # define INT_SUBU       dsubu
 343 # define INT_SUBIU      dsubu
 344 # define INT_L          ld
 345 # define INT_S          sd
 346 #endif
 347
 348 /*
 349  * How to add/sub/load/store/shift C long variables.
 350  */
 351 #if (_MIPS_SZLONG == 32)
 352 # define LONG_ADD       add
 353 # define LONG_ADDI      addi
 354 # define LONG_ADDU      addu
 355 # define LONG_ADDIU     addiu
 356 # define LONG_SUB       add
 357 # define LONG_SUBI      subi
 358 # define LONG_SUBU      subu
 359 # define LONG_SUBIU     subu
 360 # define LONG_L         lw
 361 # define LONG_S         sw
 362 # define LONG_SLL       sll
 363 # define LONG_SLLV      sllv
 364 # define LONG_SRL       srl
 365 # define LONG_SRLV      srlv
 366 # define LONG_SRA       sra
 367 # define LONG_SRAV      srav
 368 #endif
 369
 370 #if (_MIPS_SZLONG == 64)
 371 # define LONG_ADD       dadd
 372 # define LONG_ADDI      daddi
 373 # define LONG_ADDU      daddu
 374 # define LONG_ADDIU     daddiu
 375 # define LONG_SUB       dadd
 376 # define LONG_SUBI      dsubi
 377 # define LONG_SUBU      dsubu
 378 # define LONG_SUBIU     dsubu
 379 # define LONG_L         ld
 380 # define LONG_S         sd
 381 # define LONG_SLL       dsll
 382 # define LONG_SLLV      dsllv
 383 # define LONG_SRL       dsrl
 384 # define LONG_SRLV      dsrlv
 385 # define LONG_SRA       dsra
 386 # define LONG_SRAV      dsrav
 387 #endif
 388
 389 /*
 390  * How to add/sub/load/store/shift pointers.
 391  */
 392 #if (_MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZLONG == 32)
 393 # define PTR_ADD        add
 394 # define PTR_ADDI       addi
 395 # define PTR_ADDU       addu
 396 # define PTR_ADDIU      addiu
 397 # define PTR_SUB        add
 398 # define PTR_SUBI       subi
 399 # define PTR_SUBU       subu
 400 # define PTR_SUBIU      subu
 401 # define PTR_L          lw
 402 # define PTR_LA         la
 403 # define PTR_S          sw
 404 # define PTR_SLL        sll
 405 # define PTR_SLLV       sllv
 406 # define PTR_SRL        srl
 407 # define PTR_SRLV       srlv
 408 # define PTR_SRA        sra
 409 # define PTR_SRAV       srav
 410
 411 # define PTR_SCALESHIFT 2
 412 #endif
 413
 414 #if _MIPS_SIM == _MIPS_SIM_NABI32
 415 # define PTR_ADD        add
 416 # define PTR_ADDI       addi
 417 # define PTR_ADDU       add /* no u */
 418 # define PTR_ADDIU      addi /* no u */
 419 # define PTR_SUB        add
 420 # define PTR_SUBI       subi
 421 # define PTR_SUBU       sub /* no u */
 422 # define PTR_SUBIU      sub /* no u */
 423 # define PTR_L          lw
 424 # define PTR_LA         la
 425 # define PTR_S          sw
 426 # define PTR_SLL        sll
 427 # define PTR_SLLV       sllv
 428 # define PTR_SRL        srl
 429 # define PTR_SRLV       srlv
 430 # define PTR_SRA        sra
 431 # define PTR_SRAV       srav
 432
 433 # define PTR_SCALESHIFT 2
 434 #endif
 435
 436 #if (_MIPS_SIM == _MIPS_SIM_ABI32 && _MIPS_SZLONG == 64) \
 437     || _MIPS_SIM == _MIPS_SIM_ABI64
 438 # define PTR_ADD        dadd
 439 # define PTR_ADDI       daddi
 440 # define PTR_ADDU       daddu
 441 # define PTR_ADDIU      daddiu
 442 # define PTR_SUB        dadd
 443 # define PTR_SUBI       dsubi
 444 # define PTR_SUBU       dsubu
 445 # define PTR_SUBIU      dsubu
 446 # define PTR_L          ld
 447 # define PTR_LA         dla
 448 # define PTR_S          sd
 449 # define PTR_SLL        dsll
 450 # define PTR_SLLV       dsllv
 451 # define PTR_SRL        dsrl
 452 # define PTR_SRLV       dsrlv
 453 # define PTR_SRA        dsra
 454 # define PTR_SRAV       dsrav
 455
 456 # define PTR_SCALESHIFT 3
 457 #endif
 458
 459 /*
 460  * Some cp0 registers were extended to 64bit for MIPS III.
 461  */
 462 #if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
 463 # define MFC0   mfc0
 464 # define MTC0   mtc0
 465 #endif
 466 #if (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
 467     (_MIPS_ISA == _MIPS_ISA_MIPS5)
 468 # define MFC0   dmfc0
 469 # define MTC0   dmtc0
 470 #endif
 471
 472 #endif /* sys/asm.h */