third_party/x86inc/x86inc.asm

   1 ;*****************************************************************************
   2 ;* x86inc.asm
   3 ;*****************************************************************************
   4 ;* Copyright (C) 2005-2011 x264 project
   5 ;*
   6 ;* Authors: Loren Merritt <lorenm@u.washington.edu>
   7 ;*          Anton Mitrofanov <BugMaster@narod.ru>
   8 ;*          Jason Garrett-Glaser <darkshikari@gmail.com>
   9 ;*
  10 ;* Permission to use, copy, modify, and/or distribute this software for any
  11 ;* purpose with or without fee is hereby granted, provided that the above
  12 ;* copyright notice and this permission notice appear in all copies.
  13 ;*
  14 ;* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  15 ;* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  16 ;* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  17 ;* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18 ;* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  19 ;* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  20 ;* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21 ;*****************************************************************************
  22
  23 ; This is a header file for the x264ASM assembly language, which uses
  24 ; NASM/YASM syntax combined with a large number of macros to provide easy
  25 ; abstraction between different calling conventions (x86_32, win64, linux64).
  26 ; It also has various other useful features to simplify writing the kind of
  27 ; DSP functions that are most often used in x264.
  28
  29 ; Unlike the rest of x264, this file is available under an ISC license, as it
  30 ; has significant usefulness outside of x264 and we want it to be available
  31 ; to the largest audience possible.  Of course, if you modify it for your own
  32 ; purposes to add a new feature, we strongly encourage contributing a patch
  33 ; as this feature might be useful for others as well.  Send patches or ideas
  34 ; to x264-devel@videolan.org .
  35
  36 %ifndef THIRD_PARTY_X86INC_X86INC_ASM_
  37 %define THIRD_PARTY_X86INC_X86INC_ASM_
  38
  39 ; TODO(wolenetz): Consider either updating this customized version to base from
  40 ; a more recent original, or switching to using third_party/ffmpeg's version of
  41 ; this abstraction layer.  See http://crbug.com/175029
  42
  43 %define program_name ff
  44
  45 %ifdef ARCH_X86_64
  46     %ifidn __OUTPUT_FORMAT__,win32
  47         %define WIN64
  48     %elifidn __OUTPUT_FORMAT__,win64
  49         %define WIN64
  50     %else
  51         %define UNIX64
  52     %endif
  53 %endif
  54
  55 %ifdef PREFIX
  56     %define mangle(x) _ %+ x
  57 %else
  58     %define mangle(x) x
  59 %endif
  60
  61 ; FIXME: All of the 64bit asm functions that take a stride as an argument
  62 ; via register, assume that the high dword of that register is filled with 0.
  63 ; This is true in practice (since we never do any 64bit arithmetic on strides,
  64 ; and x264's strides are all positive), but is not guaranteed by the ABI.
  65
  66 ; Name of the .rodata section.
  67 ; Kludge: Something on OS X fails to align .rodata even given an align attribute,
  68 ; so use a different read-only section.
  69 %ifdef CHROMIUM
  70 %macro SECTION_RODATA 0-1 16
  71     %ifidn __OUTPUT_FORMAT__,macho64
  72         SECTION .text align=%1
  73     %elifidn __OUTPUT_FORMAT__,macho
  74         SECTION .text align=%1
  75         fakegot:
  76     %elifidn __OUTPUT_FORMAT__,aout
  77         section .text
  78     %else
  79         SECTION .rodata align=%1
  80     %endif
  81 %endmacro
  82 %else
  83 %macro SECTION_RODATA 0-1 16
  84     %ifidn __OUTPUT_FORMAT__,aout
  85         section .text
  86     %else
  87         SECTION .rodata align=%1
  88     %endif
  89 %endmacro
  90 %endif
  91
  92 ; aout does not support align=
  93 %macro SECTION_TEXT 0-1 16
  94     %ifidn __OUTPUT_FORMAT__,aout
  95         SECTION .text
  96     %else
  97         SECTION .text align=%1
  98     %endif
  99 %endmacro
 100
 101 %ifdef WIN64
 102     %define PIC
 103 %elifndef ARCH_X86_64
 104 ; For chromium we may build PIC code even for 32 bits system.
 105 %ifndef CHROMIUM
 106 ; x86_32 doesn't require PIC.
 107 ; Some distros prefer shared objects to be PIC, but nothing breaks if
 108 ; the code contains a few textrels, so we'll skip that complexity.
 109     %undef PIC
 110 %endif
 111 %endif
 112 %ifdef PIC
 113     default rel
 114 %endif
 115
 116 ; Macros to eliminate most code duplication between x86_32 and x86_64:
 117 ; Currently this works only for leaf functions which load all their arguments
 118 ; into registers at the start, and make no other use of the stack. Luckily that
 119 ; covers most of x264's asm.
 120
 121 ; PROLOGUE:
 122 ; %1 = number of arguments. loads them from stack if needed.
 123 ; %2 = number of registers used. pushes callee-saved regs if needed.
 124 ; %3 = number of xmm registers used. pushes callee-saved xmm regs if needed.
 125 ; %4 = list of names to define to registers
 126 ; PROLOGUE can also be invoked by adding the same options to cglobal
 127
 128 ; e.g.
 129 ; cglobal foo, 2,3,0, dst, src, tmp
 130 ; declares a function (foo), taking two args (dst and src) and one local variable (tmp)
 131
 132 ; TODO Some functions can use some args directly from the stack. If they're the
 133 ; last args then you can just not declare them, but if they're in the middle
 134 ; we need more flexible macro.
 135
 136 ; RET:
 137 ; Pops anything that was pushed by PROLOGUE
 138
 139 ; REP_RET:
 140 ; Same, but if it doesn't pop anything it becomes a 2-byte ret, for athlons
 141 ; which are slow when a normal ret follows a branch.
 142
 143 ; registers:
 144 ; rN and rNq are the native-size register holding function argument N
 145 ; rNd, rNw, rNb are dword, word, and byte size
 146 ; rNm is the original location of arg N (a register or on the stack), dword
 147 ; rNmp is native size
 148
 149 %macro DECLARE_REG 6
 150     %define r%1q %2
 151     %define r%1d %3
 152     %define r%1w %4
 153     %define r%1b %5
 154     %define r%1m %6
 155     %ifid %6 ; i.e. it's a register
 156         %define r%1mp %2
 157     %elifdef ARCH_X86_64 ; memory
 158         %define r%1mp qword %6
 159     %else
 160         %define r%1mp dword %6
 161     %endif
 162     %define r%1  %2
 163 %endmacro
 164
 165 %macro DECLARE_REG_SIZE 2
 166     %define r%1q r%1
 167     %define e%1q r%1
 168     %define r%1d e%1
 169     %define e%1d e%1
 170     %define r%1w %1
 171     %define e%1w %1
 172     %define r%1b %2
 173     %define e%1b %2
 174 %ifndef ARCH_X86_64
 175     %define r%1  e%1
 176 %endif
 177 %endmacro
 178
 179 DECLARE_REG_SIZE ax, al
 180 DECLARE_REG_SIZE bx, bl
 181 DECLARE_REG_SIZE cx, cl
 182 DECLARE_REG_SIZE dx, dl
 183 DECLARE_REG_SIZE si, sil
 184 DECLARE_REG_SIZE di, dil
 185 DECLARE_REG_SIZE bp, bpl
 186
 187 ; t# defines for when per-arch register allocation is more complex than just function arguments
 188
 189 %macro DECLARE_REG_TMP 1-*
 190     %assign %%i 0
 191     %rep %0
 192         CAT_XDEFINE t, %%i, r%1
 193         %assign %%i %%i+1
 194         %rotate 1
 195     %endrep
 196 %endmacro
 197
 198 %macro DECLARE_REG_TMP_SIZE 0-*
 199     %rep %0
 200         %define t%1q t%1 %+ q
 201         %define t%1d t%1 %+ d
 202         %define t%1w t%1 %+ w
 203         %define t%1b t%1 %+ b
 204         %rotate 1
 205     %endrep
 206 %endmacro
 207
 208 DECLARE_REG_TMP_SIZE 0,1,2,3,4,5,6,7,8,9
 209
 210 %ifdef ARCH_X86_64
 211     %define gprsize 8
 212 %else
 213     %define gprsize 4
 214 %endif
 215
 216 %macro PUSH 1
 217     push %1
 218     %assign stack_offset stack_offset+gprsize
 219 %endmacro
 220
 221 %macro POP 1
 222     pop %1
 223     %assign stack_offset stack_offset-gprsize
 224 %endmacro
 225
 226 %macro SUB 2
 227     sub %1, %2
 228     %ifidn %1, rsp
 229         %assign stack_offset stack_offset+(%2)
 230     %endif
 231 %endmacro
 232
 233 %macro ADD 2
 234     add %1, %2
 235     %ifidn %1, rsp
 236         %assign stack_offset stack_offset-(%2)
 237     %endif
 238 %endmacro
 239
 240 %macro movifnidn 2
 241     %ifnidn %1, %2
 242         mov %1, %2
 243     %endif
 244 %endmacro
 245
 246 %macro movsxdifnidn 2
 247     %ifnidn %1, %2
 248         movsxd %1, %2
 249     %endif
 250 %endmacro
 251
 252 %macro ASSERT 1
 253     %if (%1) == 0
 254         %error assert failed
 255     %endif
 256 %endmacro
 257
 258 %macro DEFINE_ARGS 0-*
 259     %ifdef n_arg_names
 260         %assign %%i 0
 261         %rep n_arg_names
 262             CAT_UNDEF arg_name %+ %%i, q
 263             CAT_UNDEF arg_name %+ %%i, d
 264             CAT_UNDEF arg_name %+ %%i, w
 265             CAT_UNDEF arg_name %+ %%i, b
 266             CAT_UNDEF arg_name %+ %%i, m
 267             CAT_UNDEF arg_name, %%i
 268             %assign %%i %%i+1
 269         %endrep
 270     %endif
 271
 272     %assign %%i 0
 273     %rep %0
 274         %xdefine %1q r %+ %%i %+ q
 275         %xdefine %1d r %+ %%i %+ d
 276         %xdefine %1w r %+ %%i %+ w
 277         %xdefine %1b r %+ %%i %+ b
 278         %xdefine %1m r %+ %%i %+ m
 279         CAT_XDEFINE arg_name, %%i, %1
 280         %assign %%i %%i+1
 281         %rotate 1
 282     %endrep
 283     %assign n_arg_names %%i
 284 %endmacro
 285
 286 %ifdef WIN64 ; Windows x64 ;=================================================
 287
 288 DECLARE_REG 0, rcx, ecx, cx,  cl,  ecx
 289 DECLARE_REG 1, rdx, edx, dx,  dl,  edx
 290 DECLARE_REG 2, r8,  r8d, r8w, r8b, r8d
 291 DECLARE_REG 3, r9,  r9d, r9w, r9b, r9d
 292 DECLARE_REG 4, rdi, edi, di,  dil, [rsp + stack_offset + 40]
 293 DECLARE_REG 5, rsi, esi, si,  sil, [rsp + stack_offset + 48]
 294 DECLARE_REG 6, rax, eax, ax,  al,  [rsp + stack_offset + 56]
 295 %define r7m [rsp + stack_offset + 64]
 296 %define r8m [rsp + stack_offset + 72]
 297
 298 %macro LOAD_IF_USED 2 ; reg_id, number_of_args
 299     %if %1 < %2
 300         mov r%1, [rsp + stack_offset + 8 + %1*8]
 301     %endif
 302 %endmacro
 303
 304 %macro PROLOGUE 2-4+ 0 ; #args, #regs, #xmm_regs, arg_names...
 305     ASSERT %2 >= %1
 306     %assign regs_used %2
 307     ASSERT regs_used <= 7
 308     %if regs_used > 4
 309         push r4
 310         push r5
 311         %assign stack_offset stack_offset+16
 312     %endif
 313     WIN64_SPILL_XMM %3
 314     LOAD_IF_USED 4, %1
 315     LOAD_IF_USED 5, %1
 316     LOAD_IF_USED 6, %1
 317     DEFINE_ARGS %4
 318 %endmacro
 319
 320 %macro WIN64_SPILL_XMM 1
 321     %assign xmm_regs_used %1
 322     ASSERT xmm_regs_used <= 16
 323     %if xmm_regs_used > 6
 324         sub rsp, (xmm_regs_used-6)*16+16
 325         %assign stack_offset stack_offset+(xmm_regs_used-6)*16+16
 326         %assign %%i xmm_regs_used
 327         %rep (xmm_regs_used-6)
 328             %assign %%i %%i-1
 329             movdqa [rsp + (%%i-6)*16+8], xmm %+ %%i
 330         %endrep
 331     %endif
 332 %endmacro
 333
 334 %macro WIN64_RESTORE_XMM_INTERNAL 1
 335     %if xmm_regs_used > 6
 336         %assign %%i xmm_regs_used
 337         %rep (xmm_regs_used-6)
 338             %assign %%i %%i-1
 339             movdqa xmm %+ %%i, [%1 + (%%i-6)*16+8]
 340         %endrep
 341         add %1, (xmm_regs_used-6)*16+16
 342     %endif
 343 %endmacro
 344
 345 %macro WIN64_RESTORE_XMM 1
 346     WIN64_RESTORE_XMM_INTERNAL %1
 347     %assign stack_offset stack_offset-(xmm_regs_used-6)*16+16
 348     %assign xmm_regs_used 0
 349 %endmacro
 350
 351 %macro RET 0
 352     WIN64_RESTORE_XMM_INTERNAL rsp
 353     %if regs_used > 4
 354         pop r5
 355         pop r4
 356     %endif
 357     ret
 358 %endmacro
 359
 360 %macro REP_RET 0
 361     %if regs_used > 4 || xmm_regs_used > 6
 362         RET
 363     %else
 364         rep ret
 365     %endif
 366 %endmacro
 367
 368 %elifdef ARCH_X86_64 ; *nix x64 ;=============================================
 369
 370 DECLARE_REG 0, rdi, edi, di,  dil, edi
 371 DECLARE_REG 1, rsi, esi, si,  sil, esi
 372 DECLARE_REG 2, rdx, edx, dx,  dl,  edx
 373 DECLARE_REG 3, rcx, ecx, cx,  cl,  ecx
 374 DECLARE_REG 4, r8,  r8d, r8w, r8b, r8d
 375 DECLARE_REG 5, r9,  r9d, r9w, r9b, r9d
 376 DECLARE_REG 6, rax, eax, ax,  al,  [rsp + stack_offset + 8]
 377 %define r7m [rsp + stack_offset + 16]
 378 %define r8m [rsp + stack_offset + 24]
 379
 380 %macro LOAD_IF_USED 2 ; reg_id, number_of_args
 381     %if %1 < %2
 382         mov r%1, [rsp - 40 + %1*8]
 383     %endif
 384 %endmacro
 385
 386 %macro PROLOGUE 2-4+ ; #args, #regs, #xmm_regs, arg_names...
 387     ASSERT %2 >= %1
 388     ASSERT %2 <= 7
 389     LOAD_IF_USED 6, %1
 390     DEFINE_ARGS %4
 391 %endmacro
 392
 393 %macro RET 0
 394     ret
 395 %endmacro
 396
 397 %macro REP_RET 0
 398     rep ret
 399 %endmacro
 400
 401 %else ; X86_32 ;==============================================================
 402
 403 ; Begin chromium edits
 404 %ifdef CHROMIUM
 405 ; Change the order of registers so we can get the lower 8-bit or the 5th and 6th
 406 ; arguments.
 407 DECLARE_REG 0, esi, esi, si, null, [esp + stack_offset + 4]
 408 DECLARE_REG 1, edi, edi, di, null, [esp + stack_offset + 8]
 409 DECLARE_REG 2, ecx, ecx, cx, cl,   [esp + stack_offset + 12]
 410 DECLARE_REG 3, edx, edx, dx, dl,   [esp + stack_offset + 16]
 411 DECLARE_REG 4, eax, eax, ax, al,   [esp + stack_offset + 20]
 412 DECLARE_REG 5, ebx, ebx, bx, bl,   [esp + stack_offset + 24]
 413 %else
 414 DECLARE_REG 0, eax, eax, ax, al,   [esp + stack_offset + 4]
 415 DECLARE_REG 1, ecx, ecx, cx, cl,   [esp + stack_offset + 8]
 416 DECLARE_REG 2, edx, edx, dx, dl,   [esp + stack_offset + 12]
 417 DECLARE_REG 3, ebx, ebx, bx, bl,   [esp + stack_offset + 16]
 418 DECLARE_REG 4, esi, esi, si, null, [esp + stack_offset + 20]
 419 DECLARE_REG 5, edi, edi, di, null, [esp + stack_offset + 24]
 420 %endif
 421 ; End chromium edits
 422 DECLARE_REG 6, ebp, ebp, bp, null, [esp + stack_offset + 28]
 423 %define r7m [esp + stack_offset + 32]
 424 %define r8m [esp + stack_offset + 36]
 425 %define rsp esp
 426
 427 %macro PUSH_IF_USED 1 ; reg_id
 428     %if %1 < regs_used
 429         push r%1
 430         %assign stack_offset stack_offset+4
 431     %endif
 432 %endmacro
 433
 434 %macro POP_IF_USED 1 ; reg_id
 435     %if %1 < regs_used
 436         pop r%1
 437     %endif
 438 %endmacro
 439
 440 %macro LOAD_IF_USED 2 ; reg_id, number_of_args
 441     %if %1 < %2
 442         mov r%1, [esp + stack_offset + 4 + %1*4]
 443     %endif
 444 %endmacro
 445
 446 %macro PROLOGUE 2-4+ ; #args, #regs, #xmm_regs, arg_names...
 447     ASSERT %2 >= %1
 448     %assign regs_used %2
 449     ASSERT regs_used <= 7
 450 %ifdef CHROMIUM
 451     PUSH_IF_USED 0
 452     PUSH_IF_USED 1
 453     PUSH_IF_USED 5
 454 %else
 455     PUSH_IF_USED 3
 456     PUSH_IF_USED 4
 457     PUSH_IF_USED 5
 458 %endif
 459     PUSH_IF_USED 6
 460     LOAD_IF_USED 0, %1
 461     LOAD_IF_USED 1, %1
 462     LOAD_IF_USED 2, %1
 463     LOAD_IF_USED 3, %1
 464     LOAD_IF_USED 4, %1
 465     LOAD_IF_USED 5, %1
 466     LOAD_IF_USED 6, %1
 467     DEFINE_ARGS %4
 468 %endmacro
 469
 470 %macro RET 0
 471     POP_IF_USED 6
 472 %ifdef CHROMIUM
 473     POP_IF_USED 5
 474     POP_IF_USED 1
 475     POP_IF_USED 0
 476 %else
 477     POP_IF_USED 5
 478     POP_IF_USED 4
 479     POP_IF_USED 3
 480 %endif
 481     ret
 482 %endmacro
 483
 484 %macro REP_RET 0
 485     %if regs_used > 3
 486         RET
 487     %else
 488         rep ret
 489     %endif
 490 %endmacro
 491
 492 %endif ;======================================================================
 493
 494 %ifndef WIN64
 495 %macro WIN64_SPILL_XMM 1
 496 %endmacro
 497 %macro WIN64_RESTORE_XMM 1
 498 %endmacro
 499 %endif
 500
 501
 502
 503 ;=============================================================================
 504 ; arch-independent part
 505 ;=============================================================================
 506
 507 %assign function_align 16
 508
 509 ; Symbol prefix for C linkage
 510 %macro cglobal 1-2+
 511     %xdefine %1 mangle(program_name %+ _ %+ %1)
 512     %xdefine %1.skip_prologue %1 %+ .skip_prologue
 513     %ifidn __OUTPUT_FORMAT__,elf
 514         global %1:function hidden
 515     %else
 516         global %1
 517     %endif
 518     align function_align
 519     %1:
 520     RESET_MM_PERMUTATION ; not really needed, but makes disassembly somewhat nicer
 521     %assign stack_offset 0
 522     %if %0 > 1
 523         PROLOGUE %2
 524     %endif
 525 %endmacro
 526
 527 %macro cextern 1
 528     %xdefine %1 mangle(program_name %+ _ %+ %1)
 529     extern %1
 530 %endmacro
 531
 532 ;like cextern, but without the prefix
 533 %macro cextern_naked 1
 534     %xdefine %1 mangle(%1)
 535     extern %1
 536 %endmacro
 537
 538 %macro const 2+
 539     %xdefine %1 mangle(program_name %+ _ %+ %1)
 540     global %1
 541     %1: %2
 542 %endmacro
 543
 544 ; This is needed for ELF, otherwise the GNU linker assumes the stack is
 545 ; executable by default.
 546 %ifidn __OUTPUT_FORMAT__,elf
 547 SECTION .note.GNU-stack noalloc noexec nowrite progbits
 548 %endif
 549
 550 ; merge mmx and sse*
 551
 552 %macro CAT_XDEFINE 3
 553     %xdefine %1%2 %3
 554 %endmacro
 555
 556 %macro CAT_UNDEF 2
 557     %undef %1%2
 558 %endmacro
 559
 560 %macro INIT_MMX 0
 561     %assign avx_enabled 0
 562     %define RESET_MM_PERMUTATION INIT_MMX
 563     %define mmsize 8
 564     %define num_mmregs 8
 565     %define mova movq
 566     %define movu movq
 567     %define movh movd
 568     %define movnta movntq
 569     %assign %%i 0
 570     %rep 8
 571     CAT_XDEFINE m, %%i, mm %+ %%i
 572     CAT_XDEFINE nmm, %%i, %%i
 573     %assign %%i %%i+1
 574     %endrep
 575     %rep 8
 576     CAT_UNDEF m, %%i
 577     CAT_UNDEF nmm, %%i
 578     %assign %%i %%i+1
 579     %endrep
 580 %endmacro
 581
 582 %macro INIT_XMM 0
 583     %assign avx_enabled 0
 584     %define RESET_MM_PERMUTATION INIT_XMM
 585     %define mmsize 16
 586     %define num_mmregs 8
 587     %ifdef ARCH_X86_64
 588     %define num_mmregs 16
 589     %endif
 590     %define mova movdqa
 591     %define movu movdqu
 592     %define movh movq
 593     %define movnta movntdq
 594     %assign %%i 0
 595     %rep num_mmregs
 596     CAT_XDEFINE m, %%i, xmm %+ %%i
 597     CAT_XDEFINE nxmm, %%i, %%i
 598     %assign %%i %%i+1
 599     %endrep
 600 %endmacro
 601
 602 %macro INIT_AVX 0
 603     INIT_XMM
 604     %assign avx_enabled 1
 605     %define PALIGNR PALIGNR_SSSE3
 606     %define RESET_MM_PERMUTATION INIT_AVX
 607 %endmacro
 608
 609 %macro INIT_YMM 0
 610     %assign avx_enabled 1
 611     %define RESET_MM_PERMUTATION INIT_YMM
 612     %define mmsize 32
 613     %define num_mmregs 8
 614     %ifdef ARCH_X86_64
 615     %define num_mmregs 16
 616     %endif
 617     %define mova vmovaps
 618     %define movu vmovups
 619     %assign %%i 0
 620     %rep num_mmregs
 621     CAT_XDEFINE m, %%i, ymm %+ %%i
 622     CAT_XDEFINE nymm, %%i, %%i
 623     %assign %%i %%i+1
 624     %endrep
 625 %endmacro
 626
 627 INIT_MMX
 628
 629 ; I often want to use macros that permute their arguments. e.g. there's no
 630 ; efficient way to implement butterfly or transpose or dct without swapping some
 631 ; arguments.
 632 ;
 633 ; I would like to not have to manually keep track of the permutations:
 634 ; If I insert a permutation in the middle of a function, it should automatically
 635 ; change everything that follows. For more complex macros I may also have multiple
 636 ; implementations, e.g. the SSE2 and SSSE3 versions may have different permutations.
 637 ;
 638 ; Hence these macros. Insert a PERMUTE or some SWAPs at the end of a macro that
 639 ; permutes its arguments. It's equivalent to exchanging the contents of the
 640 ; registers, except that this way you exchange the register names instead, so it
 641 ; doesn't cost any cycles.
 642
 643 %macro PERMUTE 2-* ; takes a list of pairs to swap
 644 %rep %0/2
 645     %xdefine tmp%2 m%2
 646     %xdefine ntmp%2 nm%2
 647     %rotate 2
 648 %endrep
 649 %rep %0/2
 650     %xdefine m%1 tmp%2
 651     %xdefine nm%1 ntmp%2
 652     %undef tmp%2
 653     %undef ntmp%2
 654     %rotate 2
 655 %endrep
 656 %endmacro
 657
 658 %macro SWAP 2-* ; swaps a single chain (sometimes more concise than pairs)
 659 %rep %0-1
 660 %ifdef m%1
 661     %xdefine tmp m%1
 662     %xdefine m%1 m%2
 663     %xdefine m%2 tmp
 664     CAT_XDEFINE n, m%1, %1
 665     CAT_XDEFINE n, m%2, %2
 666 %else
 667     ; If we were called as "SWAP m0,m1" rather than "SWAP 0,1" infer the original numbers here.
 668     ; Be careful using this mode in nested macros though, as in some cases there may be
 669     ; other copies of m# that have already been dereferenced and don't get updated correctly.
 670     %xdefine %%n1 n %+ %1
 671     %xdefine %%n2 n %+ %2
 672     %xdefine tmp m %+ %%n1
 673     CAT_XDEFINE m, %%n1, m %+ %%n2
 674     CAT_XDEFINE m, %%n2, tmp
 675     CAT_XDEFINE n, m %+ %%n1, %%n1
 676     CAT_XDEFINE n, m %+ %%n2, %%n2
 677 %endif
 678     %undef tmp
 679     %rotate 1
 680 %endrep
 681 %endmacro
 682
 683 ; If SAVE_MM_PERMUTATION is placed at the end of a function and given the
 684 ; function name, then any later calls to that function will automatically
 685 ; load the permutation, so values can be returned in mmregs.
 686 %macro SAVE_MM_PERMUTATION 1 ; name to save as
 687     %assign %%i 0
 688     %rep num_mmregs
 689     CAT_XDEFINE %1_m, %%i, m %+ %%i
 690     %assign %%i %%i+1
 691     %endrep
 692 %endmacro
 693
 694 %macro LOAD_MM_PERMUTATION 1 ; name to load from
 695     %assign %%i 0
 696     %rep num_mmregs
 697     CAT_XDEFINE m, %%i, %1_m %+ %%i
 698     CAT_XDEFINE n, m %+ %%i, %%i
 699     %assign %%i %%i+1
 700     %endrep
 701 %endmacro
 702
 703 %macro call 1
 704     call %1
 705     %ifdef %1_m0
 706         LOAD_MM_PERMUTATION %1
 707     %endif
 708 %endmacro
 709
 710 ; Substitutions that reduce instruction size but are functionally equivalent
 711 %macro add 2
 712     %ifnum %2
 713         %if %2==128
 714             sub %1, -128
 715         %else
 716             add %1, %2
 717         %endif
 718     %else
 719         add %1, %2
 720     %endif
 721 %endmacro
 722
 723 %macro sub 2
 724     %ifnum %2
 725         %if %2==128
 726             add %1, -128
 727         %else
 728             sub %1, %2
 729         %endif
 730     %else
 731         sub %1, %2
 732     %endif
 733 %endmacro
 734
 735 ;=============================================================================
 736 ; AVX abstraction layer
 737 ;=============================================================================
 738
 739 %assign i 0
 740 %rep 16
 741     %if i < 8
 742         CAT_XDEFINE sizeofmm, i, 8
 743     %endif
 744     CAT_XDEFINE sizeofxmm, i, 16
 745     CAT_XDEFINE sizeofymm, i, 32
 746 %assign i i+1
 747 %endrep
 748 %undef i
 749
 750 ;%1 == instruction
 751 ;%2 == 1 if float, 0 if int
 752 ;%3 == 0 if 3-operand (xmm, xmm, xmm), 1 if 4-operand (xmm, xmm, xmm, imm)
 753 ;%4 == number of operands given
 754 ;%5+: operands
 755 %macro RUN_AVX_INSTR 6-7+
 756     %if sizeof%5==32
 757         v%1 %5, %6, %7
 758     %else
 759         %if sizeof%5==8
 760             %define %%regmov movq
 761         %elif %2
 762             %define %%regmov movaps
 763         %else
 764             %define %%regmov movdqa
 765         %endif
 766
 767         %if %4>=3+%3
 768             %ifnidn %5, %6
 769                 %if avx_enabled && sizeof%5==16
 770                     v%1 %5, %6, %7
 771                 %else
 772                     %%regmov %5, %6
 773                     %1 %5, %7
 774                 %endif
 775             %else
 776                 %1 %5, %7
 777             %endif
 778         %elif %3
 779             %1 %5, %6, %7
 780         %else
 781             %1 %5, %6
 782         %endif
 783     %endif
 784 %endmacro
 785
 786 ;%1 == instruction
 787 ;%2 == 1 if float, 0 if int
 788 ;%3 == 0 if 3-operand (xmm, xmm, xmm), 1 if 4-operand (xmm, xmm, xmm, imm)
 789 %macro AVX_INSTR 3
 790     %macro %1 2-8 fnord, fnord, fnord, %1, %2, %3
 791         %ifidn %3, fnord
 792             RUN_AVX_INSTR %6, %7, %8, 2, %1, %2
 793         %elifidn %4, fnord
 794             RUN_AVX_INSTR %6, %7, %8, 3, %1, %2, %3
 795         %elifidn %5, fnord
 796             RUN_AVX_INSTR %6, %7, %8, 4, %1, %2, %3, %4
 797         %else
 798             RUN_AVX_INSTR %6, %7, %8, 5, %1, %2, %3, %4, %5
 799         %endif
 800     %endmacro
 801 %endmacro
 802
 803 AVX_INSTR addpd, 1, 0
 804 AVX_INSTR addps, 1, 0
 805 AVX_INSTR addsd, 1, 0
 806 AVX_INSTR addss, 1, 0
 807 AVX_INSTR addsubpd, 1, 0
 808 AVX_INSTR addsubps, 1, 0
 809 AVX_INSTR andpd, 1, 0
 810 AVX_INSTR andps, 1, 0
 811 AVX_INSTR andnpd, 1, 0
 812 AVX_INSTR andnps, 1, 0
 813 AVX_INSTR blendpd, 1, 0
 814 AVX_INSTR blendps, 1, 0
 815 AVX_INSTR blendvpd, 1, 0
 816 AVX_INSTR blendvps, 1, 0
 817 AVX_INSTR cmppd, 1, 0
 818 AVX_INSTR cmpps, 1, 0
 819 AVX_INSTR cmpsd, 1, 0
 820 AVX_INSTR cmpss, 1, 0
 821 AVX_INSTR divpd, 1, 0
 822 AVX_INSTR divps, 1, 0
 823 AVX_INSTR divsd, 1, 0
 824 AVX_INSTR divss, 1, 0
 825 AVX_INSTR dppd, 1, 0
 826 AVX_INSTR dpps, 1, 0
 827 AVX_INSTR haddpd, 1, 0
 828 AVX_INSTR haddps, 1, 0
 829 AVX_INSTR hsubpd, 1, 0
 830 AVX_INSTR hsubps, 1, 0
 831 AVX_INSTR maxpd, 1, 0
 832 AVX_INSTR maxps, 1, 0
 833 AVX_INSTR maxsd, 1, 0
 834 AVX_INSTR maxss, 1, 0
 835 AVX_INSTR minpd, 1, 0
 836 AVX_INSTR minps, 1, 0
 837 AVX_INSTR minsd, 1, 0
 838 AVX_INSTR minss, 1, 0
 839 AVX_INSTR mpsadbw, 0, 1
 840 AVX_INSTR mulpd, 1, 0
 841 AVX_INSTR mulps, 1, 0
 842 AVX_INSTR mulsd, 1, 0
 843 AVX_INSTR mulss, 1, 0
 844 AVX_INSTR orpd, 1, 0
 845 AVX_INSTR orps, 1, 0
 846 AVX_INSTR packsswb, 0, 0
 847 AVX_INSTR packssdw, 0, 0
 848 AVX_INSTR packuswb, 0, 0
 849 AVX_INSTR packusdw, 0, 0
 850 AVX_INSTR paddb, 0, 0
 851 AVX_INSTR paddw, 0, 0
 852 AVX_INSTR paddd, 0, 0
 853 AVX_INSTR paddq, 0, 0
 854 AVX_INSTR paddsb, 0, 0
 855 AVX_INSTR paddsw, 0, 0
 856 AVX_INSTR paddusb, 0, 0
 857 AVX_INSTR paddusw, 0, 0
 858 AVX_INSTR palignr, 0, 1
 859 AVX_INSTR pand, 0, 0
 860 AVX_INSTR pandn, 0, 0
 861 AVX_INSTR pavgb, 0, 0
 862 AVX_INSTR pavgw, 0, 0
 863 AVX_INSTR pblendvb, 0, 0
 864 AVX_INSTR pblendw, 0, 1
 865 AVX_INSTR pcmpestri, 0, 0
 866 AVX_INSTR pcmpestrm, 0, 0
 867 AVX_INSTR pcmpistri, 0, 0
 868 AVX_INSTR pcmpistrm, 0, 0
 869 AVX_INSTR pcmpeqb, 0, 0
 870 AVX_INSTR pcmpeqw, 0, 0
 871 AVX_INSTR pcmpeqd, 0, 0
 872 AVX_INSTR pcmpeqq, 0, 0
 873 AVX_INSTR pcmpgtb, 0, 0
 874 AVX_INSTR pcmpgtw, 0, 0
 875 AVX_INSTR pcmpgtd, 0, 0
 876 AVX_INSTR pcmpgtq, 0, 0
 877 AVX_INSTR phaddw, 0, 0
 878 AVX_INSTR phaddd, 0, 0
 879 AVX_INSTR phaddsw, 0, 0
 880 AVX_INSTR phsubw, 0, 0
 881 AVX_INSTR phsubd, 0, 0
 882 AVX_INSTR phsubsw, 0, 0
 883 AVX_INSTR pmaddwd, 0, 0
 884 AVX_INSTR pmaddubsw, 0, 0
 885 AVX_INSTR pmaxsb, 0, 0
 886 AVX_INSTR pmaxsw, 0, 0
 887 AVX_INSTR pmaxsd, 0, 0
 888 AVX_INSTR pmaxub, 0, 0
 889 AVX_INSTR pmaxuw, 0, 0
 890 AVX_INSTR pmaxud, 0, 0
 891 AVX_INSTR pminsb, 0, 0
 892 AVX_INSTR pminsw, 0, 0
 893 AVX_INSTR pminsd, 0, 0
 894 AVX_INSTR pminub, 0, 0
 895 AVX_INSTR pminuw, 0, 0
 896 AVX_INSTR pminud, 0, 0
 897 AVX_INSTR pmulhuw, 0, 0
 898 AVX_INSTR pmulhrsw, 0, 0
 899 AVX_INSTR pmulhw, 0, 0
 900 AVX_INSTR pmullw, 0, 0
 901 AVX_INSTR pmulld, 0, 0
 902 AVX_INSTR pmuludq, 0, 0
 903 AVX_INSTR pmuldq, 0, 0
 904 AVX_INSTR por, 0, 0
 905 AVX_INSTR psadbw, 0, 0
 906 AVX_INSTR pshufb, 0, 0
 907 AVX_INSTR psignb, 0, 0
 908 AVX_INSTR psignw, 0, 0
 909 AVX_INSTR psignd, 0, 0
 910 AVX_INSTR psllw, 0, 0
 911 AVX_INSTR pslld, 0, 0
 912 AVX_INSTR psllq, 0, 0
 913 AVX_INSTR pslldq, 0, 0
 914 AVX_INSTR psraw, 0, 0
 915 AVX_INSTR psrad, 0, 0
 916 AVX_INSTR psrlw, 0, 0
 917 AVX_INSTR psrld, 0, 0
 918 AVX_INSTR psrlq, 0, 0
 919 AVX_INSTR psrldq, 0, 0
 920 AVX_INSTR psubb, 0, 0
 921 AVX_INSTR psubw, 0, 0
 922 AVX_INSTR psubd, 0, 0
 923 AVX_INSTR psubq, 0, 0
 924 AVX_INSTR psubsb, 0, 0
 925 AVX_INSTR psubsw, 0, 0
 926 AVX_INSTR psubusb, 0, 0
 927 AVX_INSTR psubusw, 0, 0
 928 AVX_INSTR punpckhbw, 0, 0
 929 AVX_INSTR punpckhwd, 0, 0
 930 AVX_INSTR punpckhdq, 0, 0
 931 AVX_INSTR punpckhqdq, 0, 0
 932 AVX_INSTR punpcklbw, 0, 0
 933 AVX_INSTR punpcklwd, 0, 0
 934 AVX_INSTR punpckldq, 0, 0
 935 AVX_INSTR punpcklqdq, 0, 0
 936 AVX_INSTR pxor, 0, 0
 937 AVX_INSTR shufps, 0, 1
 938 AVX_INSTR subpd, 1, 0
 939 AVX_INSTR subps, 1, 0
 940 AVX_INSTR subsd, 1, 0
 941 AVX_INSTR subss, 1, 0
 942 AVX_INSTR unpckhpd, 1, 0
 943 AVX_INSTR unpckhps, 1, 0
 944 AVX_INSTR unpcklpd, 1, 0
 945 AVX_INSTR unpcklps, 1, 0
 946 AVX_INSTR xorpd, 1, 0
 947 AVX_INSTR xorps, 1, 0
 948
 949 ; 3DNow instructions, for sharing code between AVX, SSE and 3DN
 950 AVX_INSTR pfadd, 1, 0
 951 AVX_INSTR pfsub, 1, 0
 952 AVX_INSTR pfmul, 1, 0
 953
 954 ;=============================================================================
 955 ; Chromium extensions
 956 ;=============================================================================
 957
 958 %ifdef CHROMIUM
 959 ; Always build PIC code on Mac or Linux for Chromium.
 960 %ifdef MACHO
 961 %define PIC
 962 %endif
 963 %ifdef ELF
 964 %define PIC
 965 %endif
 966
 967 ;
 968 ; LOAD_SYM %1 (reg), %2 (sym)
 969 ; Copies the address to a local symbol to the specified register.
 970 ;
 971
 972 %macro LOAD_SYM 2
 973
 974 %ifdef PIC
 975   call      %%geteip
 976   add       %1, %2 - $
 977   jmp       %%end
 978 %%geteip:
 979   mov       %1, [rsp]
 980   ret
 981 %%end:
 982
 983 %else
 984   lea       %1, [%2]
 985 %endif
 986
 987 %endmacro
 988
 989 ;
 990 ; MOVq %1 (xmm), %2 (reg)
 991 ; MOVq %1 (reg), %2 (xmm)
 992 ; Copies a general-purpose register to an XMM register, and vice versa.
 993 ;
 994 %macro MOVq 2
 995 %if gprsize == 8
 996   movq      %1, %2
 997 %else
 998   movd      %1, %2
 999 %endif
1000 %endmacro
1001
1002 %endif  ; CHROMIUM
1003
1004 %endif  ; THIRD_PARTY_X86INC_X86INC_ASM_