Implements RGB to YV12 conversion in YASM.

media/base/simd/x86inc.asm

+;*****************************************************************************
+;* x86inc.asm
+;*****************************************************************************
+;* Copyright (C) 2005-2011 x264 project
+;*
+;* Authors: Loren Merritt <lorenm@u.washington.edu>
+;*          Anton Mitrofanov <BugMaster@narod.ru>
+;*          Jason Garrett-Glaser <darkshikari@gmail.com>
+;*
+;* Permission to use, copy, modify, and/or distribute this software for any
+;* purpose with or without fee is hereby granted, provided that the above
+;* copyright notice and this permission notice appear in all copies.

[Steve Block, 2012/03/19 15:37:17]

Hi Hironori, it looks like this file is copied directly from x264ASM? It should
probably be moved to a directory under third_party/, so we can add a
README.chromium and a license file, and include the license in about:credits.

+;*
+;* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+;* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+;* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+;* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+;* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+;* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+;* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+;*****************************************************************************
+
+; This is a header file for the x264ASM assembly language, which uses
+; NASM/YASM syntax combined with a large number of macros to provide easy
+; abstraction between different calling conventions (x86_32, win64, linux64).
+; It also has various other useful features to simplify writing the kind of
+; DSP functions that are most often used in x264.
+
+; Unlike the rest of x264, this file is available under an ISC license, as it
+; has significant usefulness outside of x264 and we want it to be available
+; to the largest audience possible.  Of course, if you modify it for your own
+; purposes to add a new feature, we strongly encourage contributing a patch
+; as this feature might be useful for others as well.  Send patches or ideas
+; to x264-devel@videolan.org .
+
+%ifndef MEDIA_BASE_SIMD_X86INC_ASM_
+%define MEDIA_BASE_SIMD_X86INC_ASM_
+
+%define program_name ff
+
+%ifdef ARCH_X86_64
+    %ifidn __OUTPUT_FORMAT__,win32
+        %define WIN64
+    %else
+        %define UNIX64
+    %endif
+%endif
+
+%ifdef PREFIX
+    %define mangle(x) _ %+ x
+%else
+    %define mangle(x) x
+%endif
+
+; FIXME: All of the 64bit asm functions that take a stride as an argument
+; via register, assume that the high dword of that register is filled with 0.
+; This is true in practice (since we never do any 64bit arithmetic on strides,
+; and x264's strides are all positive), but is not guaranteed by the ABI.
+
+; Name of the .rodata section.
+; Kludge: Something on OS X fails to align .rodata even given an align attribute,
+; so use a different read-only section.
+%ifdef CHROMIUM
+%macro SECTION_RODATA 0-1 16
+    %ifidn __OUTPUT_FORMAT__,macho64
+        SECTION .text align=%1
+    %elifidn __OUTPUT_FORMAT__,macho
+        SECTION .text align=%1
+        fakegot:
+    %elifidn __OUTPUT_FORMAT__,aout
+        section .text
+    %else
+        SECTION .rodata align=%1
+    %endif
+%endmacro
+%else
+%macro SECTION_RODATA 0-1 16
+    %ifidn __OUTPUT_FORMAT__,aout
+        section .text
+    %else
+        SECTION .rodata align=%1
+    %endif
+%endmacro
+%endif
+
+; aout does not support align=
+%macro SECTION_TEXT 0-1 16
+    %ifidn __OUTPUT_FORMAT__,aout
+        SECTION .text
+    %else
+        SECTION .text align=%1
+    %endif
+%endmacro
+
+%ifdef WIN64
+    %define PIC
+%elifndef ARCH_X86_64
+; x86_32 doesn't require PIC.
+; Some distros prefer shared objects to be PIC, but nothing breaks if
+; the code contains a few textrels, so we'll skip that complexity.
+    %undef PIC
+%endif
+%ifdef PIC
+    default rel
+%endif
+
+; Macros to eliminate most code duplication between x86_32 and x86_64:
+; Currently this works only for leaf functions which load all their arguments
+; into registers at the start, and make no other use of the stack. Luckily that
+; covers most of x264's asm.
+
+; PROLOGUE:
+; %1 = number of arguments. loads them from stack if needed.
+; %2 = number of registers used. pushes callee-saved regs if needed.
+; %3 = number of xmm registers used. pushes callee-saved xmm regs if needed.
+; %4 = list of names to define to registers
+; PROLOGUE can also be invoked by adding the same options to cglobal
+
+; e.g.
+; cglobal foo, 2,3,0, dst, src, tmp
+; declares a function (foo), taking two args (dst and src) and one local variable (tmp)
+
+; TODO Some functions can use some args directly from the stack. If they're the
+; last args then you can just not declare them, but if they're in the middle
+; we need more flexible macro.
+
+; RET:
+; Pops anything that was pushed by PROLOGUE
+
+; REP_RET:
+; Same, but if it doesn't pop anything it becomes a 2-byte ret, for athlons
+; which are slow when a normal ret follows a branch.
+
+; registers:
+; rN and rNq are the native-size register holding function argument N
+; rNd, rNw, rNb are dword, word, and byte size
+; rNm is the original location of arg N (a register or on the stack), dword
+; rNmp is native size
+
+%macro DECLARE_REG 6
+    %define r%1q %2
+    %define r%1d %3
+    %define r%1w %4
+    %define r%1b %5
+    %define r%1m %6
+    %ifid %6 ; i.e. it's a register
+        %define r%1mp %2
+    %elifdef ARCH_X86_64 ; memory
+        %define r%1mp qword %6
+    %else
+        %define r%1mp dword %6
+    %endif
+    %define r%1  %2
+%endmacro
+
+%macro DECLARE_REG_SIZE 2
+    %define r%1q r%1
+    %define e%1q r%1
+    %define r%1d e%1
+    %define e%1d e%1
+    %define r%1w %1
+    %define e%1w %1
+    %define r%1b %2
+    %define e%1b %2
+%ifndef ARCH_X86_64
+    %define r%1  e%1
+%endif
+%endmacro
+
+DECLARE_REG_SIZE ax, al
+DECLARE_REG_SIZE bx, bl
+DECLARE_REG_SIZE cx, cl
+DECLARE_REG_SIZE dx, dl
+DECLARE_REG_SIZE si, sil
+DECLARE_REG_SIZE di, dil
+DECLARE_REG_SIZE bp, bpl
+
+; t# defines for when per-arch register allocation is more complex than just function arguments
+
+%macro DECLARE_REG_TMP 1-*
+    %assign %%i 0
+    %rep %0
+        CAT_XDEFINE t, %%i, r%1
+        %assign %%i %%i+1
+        %rotate 1
+    %endrep
+%endmacro
+
+%macro DECLARE_REG_TMP_SIZE 0-*
+    %rep %0
+        %define t%1q t%1 %+ q
+        %define t%1d t%1 %+ d
+        %define t%1w t%1 %+ w
+        %define t%1b t%1 %+ b
+        %rotate 1
+    %endrep
+%endmacro
+
+DECLARE_REG_TMP_SIZE 0,1,2,3,4,5,6,7,8,9
+
+%ifdef ARCH_X86_64
+    %define gprsize 8
+%else
+    %define gprsize 4
+%endif
+
+%macro PUSH 1
+    push %1
+    %assign stack_offset stack_offset+gprsize
+%endmacro
+
+%macro POP 1
+    pop %1
+    %assign stack_offset stack_offset-gprsize
+%endmacro
+
+%macro SUB 2
+    sub %1, %2
+    %ifidn %1, rsp
+        %assign stack_offset stack_offset+(%2)
+    %endif
+%endmacro
+
+%macro ADD 2
+    add %1, %2
+    %ifidn %1, rsp
+        %assign stack_offset stack_offset-(%2)
+    %endif
+%endmacro
+
+%macro movifnidn 2
+    %ifnidn %1, %2
+        mov %1, %2
+    %endif
+%endmacro
+
+%macro movsxdifnidn 2
+    %ifnidn %1, %2
+        movsxd %1, %2
+    %endif
+%endmacro
+
+%macro ASSERT 1
+    %if (%1) == 0
+        %error assert failed
+    %endif
+%endmacro
+
+%macro DEFINE_ARGS 0-*
+    %ifdef n_arg_names
+        %assign %%i 0
+        %rep n_arg_names
+            CAT_UNDEF arg_name %+ %%i, q
+            CAT_UNDEF arg_name %+ %%i, d
+            CAT_UNDEF arg_name %+ %%i, w
+            CAT_UNDEF arg_name %+ %%i, b
+            CAT_UNDEF arg_name %+ %%i, m
+            CAT_UNDEF arg_name, %%i
+            %assign %%i %%i+1
+        %endrep
+    %endif
+
+    %assign %%i 0
+    %rep %0
+        %xdefine %1q r %+ %%i %+ q
+        %xdefine %1d r %+ %%i %+ d
+        %xdefine %1w r %+ %%i %+ w
+        %xdefine %1b r %+ %%i %+ b
+        %xdefine %1m r %+ %%i %+ m
+        CAT_XDEFINE arg_name, %%i, %1
+        %assign %%i %%i+1
+        %rotate 1
+    %endrep
+    %assign n_arg_names %%i
+%endmacro
+
+%ifdef WIN64 ; Windows x64 ;=================================================
+
+DECLARE_REG 0, rcx, ecx, cx,  cl,  ecx
+DECLARE_REG 1, rdx, edx, dx,  dl,  edx
+DECLARE_REG 2, r8,  r8d, r8w, r8b, r8d
+DECLARE_REG 3, r9,  r9d, r9w, r9b, r9d
+DECLARE_REG 4, rdi, edi, di,  dil, [rsp + stack_offset + 40]
+DECLARE_REG 5, rsi, esi, si,  sil, [rsp + stack_offset + 48]
+DECLARE_REG 6, rax, eax, ax,  al,  [rsp + stack_offset + 56]
+%define r7m [rsp + stack_offset + 64]
+%define r8m [rsp + stack_offset + 72]
+
+%macro LOAD_IF_USED 2 ; reg_id, number_of_args
+    %if %1 < %2
+        mov r%1, [rsp + stack_offset + 8 + %1*8]
+    %endif
+%endmacro
+
+%macro PROLOGUE 2-4+ 0 ; #args, #regs, #xmm_regs, arg_names...
+    ASSERT %2 >= %1
+    %assign regs_used %2
+    ASSERT regs_used <= 7
+    %if regs_used > 4
+        push r4
+        push r5
+        %assign stack_offset stack_offset+16
+    %endif
+    WIN64_SPILL_XMM %3
+    LOAD_IF_USED 4, %1
+    LOAD_IF_USED 5, %1
+    LOAD_IF_USED 6, %1
+    DEFINE_ARGS %4
+%endmacro
+
+%macro WIN64_SPILL_XMM 1
+    %assign xmm_regs_used %1
+    ASSERT xmm_regs_used <= 16
+    %if xmm_regs_used > 6
+        sub rsp, (xmm_regs_used-6)*16+16
+        %assign stack_offset stack_offset+(xmm_regs_used-6)*16+16
+        %assign %%i xmm_regs_used
+        %rep (xmm_regs_used-6)
+            %assign %%i %%i-1
+            movdqa [rsp + (%%i-6)*16+8], xmm %+ %%i
+        %endrep
+    %endif
+%endmacro
+
+%macro WIN64_RESTORE_XMM_INTERNAL 1
+    %if xmm_regs_used > 6
+        %assign %%i xmm_regs_used
+        %rep (xmm_regs_used-6)
+            %assign %%i %%i-1
+            movdqa xmm %+ %%i, [%1 + (%%i-6)*16+8]
+        %endrep
+        add %1, (xmm_regs_used-6)*16+16
+    %endif
+%endmacro
+
+%macro WIN64_RESTORE_XMM 1
+    WIN64_RESTORE_XMM_INTERNAL %1
+    %assign stack_offset stack_offset-(xmm_regs_used-6)*16+16
+    %assign xmm_regs_used 0
+%endmacro
+
+%macro RET 0
+    WIN64_RESTORE_XMM_INTERNAL rsp
+    %if regs_used > 4
+        pop r5
+        pop r4
+    %endif
+    ret
+%endmacro
+
+%macro REP_RET 0
+    %if regs_used > 4 || xmm_regs_used > 6
+        RET
+    %else
+        rep ret
+    %endif
+%endmacro
+
+%elifdef ARCH_X86_64 ; *nix x64 ;=============================================
+
+DECLARE_REG 0, rdi, edi, di,  dil, edi
+DECLARE_REG 1, rsi, esi, si,  sil, esi
+DECLARE_REG 2, rdx, edx, dx,  dl,  edx
+DECLARE_REG 3, rcx, ecx, cx,  cl,  ecx
+DECLARE_REG 4, r8,  r8d, r8w, r8b, r8d
+DECLARE_REG 5, r9,  r9d, r9w, r9b, r9d
+DECLARE_REG 6, rax, eax, ax,  al,  [rsp + stack_offset + 8]
+%define r7m [rsp + stack_offset + 16]
+%define r8m [rsp + stack_offset + 24]
+
+%macro LOAD_IF_USED 2 ; reg_id, number_of_args
+    %if %1 < %2
+        mov r%1, [rsp - 40 + %1*8]
+    %endif
+%endmacro
+
+%macro PROLOGUE 2-4+ ; #args, #regs, #xmm_regs, arg_names...
+    ASSERT %2 >= %1
+    ASSERT %2 <= 7
+    LOAD_IF_USED 6, %1
+    DEFINE_ARGS %4
+%endmacro
+
+%macro RET 0
+    ret
+%endmacro
+
+%macro REP_RET 0
+    rep ret
+%endmacro
+
+%else ; X86_32 ;==============================================================
+
+; Begin chromium edits
+%ifdef CHROMIUM
+; Change the order of registers so we can get the lower 8-bit or the 5th and 6th
+; arguments.
+DECLARE_REG 0, esi, esi, si, null, [esp + stack_offset + 4]
+DECLARE_REG 1, edi, edi, di, null, [esp + stack_offset + 8]
+DECLARE_REG 2, ecx, ecx, cx, cl,   [esp + stack_offset + 12]
+DECLARE_REG 3, edx, edx, dx, dl,   [esp + stack_offset + 16]
+DECLARE_REG 4, eax, eax, ax, al,   [esp + stack_offset + 20]
+DECLARE_REG 5, ebx, ebx, bx, bl,   [esp + stack_offset + 24]
+%else
+DECLARE_REG 0, eax, eax, ax, al,   [esp + stack_offset + 4]
+DECLARE_REG 1, ecx, ecx, cx, cl,   [esp + stack_offset + 8]
+DECLARE_REG 2, edx, edx, dx, dl,   [esp + stack_offset + 12]
+DECLARE_REG 3, ebx, ebx, bx, bl,   [esp + stack_offset + 16]
+DECLARE_REG 4, esi, esi, si, null, [esp + stack_offset + 20]
+DECLARE_REG 5, edi, edi, di, null, [esp + stack_offset + 24]
+%endif
+; End chromium edits
+DECLARE_REG 6, ebp, ebp, bp, null, [esp + stack_offset + 28]
+%define r7m [esp + stack_offset + 32]
+%define r8m [esp + stack_offset + 36]
+%define rsp esp
+
+%macro PUSH_IF_USED 1 ; reg_id
+    %if %1 < regs_used
+        push r%1
+        %assign stack_offset stack_offset+4
+    %endif
+%endmacro
+
+%macro POP_IF_USED 1 ; reg_id
+    %if %1 < regs_used
+        pop r%1
+    %endif
+%endmacro
+
+%macro LOAD_IF_USED 2 ; reg_id, number_of_args
+    %if %1 < %2
+        mov r%1, [esp + stack_offset + 4 + %1*4]
+    %endif
+%endmacro
+
+%macro PROLOGUE 2-4+ ; #args, #regs, #xmm_regs, arg_names...
+    ASSERT %2 >= %1
+    %assign regs_used %2
+    ASSERT regs_used <= 7
+%ifdef CHROMIUM
+    PUSH_IF_USED 0
+    PUSH_IF_USED 1
+    PUSH_IF_USED 5
+%else
+    PUSH_IF_USED 3
+    PUSH_IF_USED 4
+    PUSH_IF_USED 5
+%endif
+    PUSH_IF_USED 6
+    LOAD_IF_USED 0, %1
+    LOAD_IF_USED 1, %1
+    LOAD_IF_USED 2, %1
+    LOAD_IF_USED 3, %1
+    LOAD_IF_USED 4, %1
+    LOAD_IF_USED 5, %1
+    LOAD_IF_USED 6, %1
+    DEFINE_ARGS %4
+%endmacro
+
+%macro RET 0
+    POP_IF_USED 6
+%ifdef CHROMIUM
+    POP_IF_USED 5
+    POP_IF_USED 1
+    POP_IF_USED 0
+%else
+    POP_IF_USED 5
+    POP_IF_USED 4
+    POP_IF_USED 3
+%endif
+    ret
+%endmacro
+
+%macro REP_RET 0
+    %if regs_used > 3
+        RET
+    %else
+        rep ret
+    %endif
+%endmacro
+
+%endif ;======================================================================
+
+%ifndef WIN64
+%macro WIN64_SPILL_XMM 1
+%endmacro
+%macro WIN64_RESTORE_XMM 1
+%endmacro
+%endif
+
+
+
+;=============================================================================
+; arch-independent part
+;=============================================================================
+
+%assign function_align 16
+
+; Symbol prefix for C linkage
+%macro cglobal 1-2+
+    %xdefine %1 mangle(program_name %+ _ %+ %1)
+    %xdefine %1.skip_prologue %1 %+ .skip_prologue
+    %ifidn __OUTPUT_FORMAT__,elf
+        global %1:function hidden
+    %else
+        global %1
+    %endif
+    align function_align
+    %1:
+    RESET_MM_PERMUTATION ; not really needed, but makes disassembly somewhat nicer
+    %assign stack_offset 0
+    %if %0 > 1
+        PROLOGUE %2
+    %endif
+%endmacro
+
+%macro cextern 1
+    %xdefine %1 mangle(program_name %+ _ %+ %1)
+    extern %1
+%endmacro
+
+;like cextern, but without the prefix
+%macro cextern_naked 1
+    %xdefine %1 mangle(%1)
+    extern %1
+%endmacro
+
+%macro const 2+
+    %xdefine %1 mangle(program_name %+ _ %+ %1)
+    global %1
+    %1: %2
+%endmacro
+
+; This is needed for ELF, otherwise the GNU linker assumes the stack is
+; executable by default.
+%ifidn __OUTPUT_FORMAT__,elf
+SECTION .note.GNU-stack noalloc noexec nowrite progbits
+%endif
+
+; merge mmx and sse*
+
+%macro CAT_XDEFINE 3
+    %xdefine %1%2 %3
+%endmacro
+
+%macro CAT_UNDEF 2
+    %undef %1%2
+%endmacro
+
+%macro INIT_MMX 0
+    %assign avx_enabled 0
+    %define RESET_MM_PERMUTATION INIT_MMX
+    %define mmsize 8
+    %define num_mmregs 8
+    %define mova movq
+    %define movu movq
+    %define movh movd
+    %define movnta movntq
+    %assign %%i 0
+    %rep 8
+    CAT_XDEFINE m, %%i, mm %+ %%i
+    CAT_XDEFINE nmm, %%i, %%i
+    %assign %%i %%i+1
+    %endrep
+    %rep 8
+    CAT_UNDEF m, %%i
+    CAT_UNDEF nmm, %%i
+    %assign %%i %%i+1
+    %endrep
+%endmacro
+
+%macro INIT_XMM 0
+    %assign avx_enabled 0
+    %define RESET_MM_PERMUTATION INIT_XMM
+    %define mmsize 16
+    %define num_mmregs 8
+    %ifdef ARCH_X86_64
+    %define num_mmregs 16
+    %endif
+    %define mova movdqa
+    %define movu movdqu
+    %define movh movq
+    %define movnta movntdq
+    %assign %%i 0
+    %rep num_mmregs
+    CAT_XDEFINE m, %%i, xmm %+ %%i
+    CAT_XDEFINE nxmm, %%i, %%i
+    %assign %%i %%i+1
+    %endrep
+%endmacro
+
+%macro INIT_AVX 0
+    INIT_XMM
+    %assign avx_enabled 1
+    %define PALIGNR PALIGNR_SSSE3
+    %define RESET_MM_PERMUTATION INIT_AVX
+%endmacro
+
+%macro INIT_YMM 0
+    %assign avx_enabled 1
+    %define RESET_MM_PERMUTATION INIT_YMM
+    %define mmsize 32
+    %define num_mmregs 8
+    %ifdef ARCH_X86_64
+    %define num_mmregs 16
+    %endif
+    %define mova vmovaps
+    %define movu vmovups
+    %assign %%i 0
+    %rep num_mmregs
+    CAT_XDEFINE m, %%i, ymm %+ %%i
+    CAT_XDEFINE nymm, %%i, %%i
+    %assign %%i %%i+1
+    %endrep
+%endmacro
+
+INIT_MMX
+
+; I often want to use macros that permute their arguments. e.g. there's no
+; efficient way to implement butterfly or transpose or dct without swapping some
+; arguments.
+;
+; I would like to not have to manually keep track of the permutations:
+; If I insert a permutation in the middle of a function, it should automatically
+; change everything that follows. For more complex macros I may also have multiple
+; implementations, e.g. the SSE2 and SSSE3 versions may have different permutations.
+;
+; Hence these macros. Insert a PERMUTE or some SWAPs at the end of a macro that
+; permutes its arguments. It's equivalent to exchanging the contents of the
+; registers, except that this way you exchange the register names instead, so it
+; doesn't cost any cycles.
+
+%macro PERMUTE 2-* ; takes a list of pairs to swap
+%rep %0/2
+    %xdefine tmp%2 m%2
+    %xdefine ntmp%2 nm%2
+    %rotate 2
+%endrep
+%rep %0/2
+    %xdefine m%1 tmp%2
+    %xdefine nm%1 ntmp%2
+    %undef tmp%2
+    %undef ntmp%2
+    %rotate 2
+%endrep
+%endmacro
+
+%macro SWAP 2-* ; swaps a single chain (sometimes more concise than pairs)
+%rep %0-1
+%ifdef m%1
+    %xdefine tmp m%1
+    %xdefine m%1 m%2
+    %xdefine m%2 tmp
+    CAT_XDEFINE n, m%1, %1
+    CAT_XDEFINE n, m%2, %2
+%else
+    ; If we were called as "SWAP m0,m1" rather than "SWAP 0,1" infer the original numbers here.
+    ; Be careful using this mode in nested macros though, as in some cases there may be
+    ; other copies of m# that have already been dereferenced and don't get updated correctly.
+    %xdefine %%n1 n %+ %1
+    %xdefine %%n2 n %+ %2
+    %xdefine tmp m %+ %%n1
+    CAT_XDEFINE m, %%n1, m %+ %%n2
+    CAT_XDEFINE m, %%n2, tmp
+    CAT_XDEFINE n, m %+ %%n1, %%n1
+    CAT_XDEFINE n, m %+ %%n2, %%n2
+%endif
+    %undef tmp
+    %rotate 1
+%endrep
+%endmacro
+
+; If SAVE_MM_PERMUTATION is placed at the end of a function and given the
+; function name, then any later calls to that function will automatically
+; load the permutation, so values can be returned in mmregs.
+%macro SAVE_MM_PERMUTATION 1 ; name to save as
+    %assign %%i 0
+    %rep num_mmregs
+    CAT_XDEFINE %1_m, %%i, m %+ %%i
+    %assign %%i %%i+1
+    %endrep
+%endmacro
+
+%macro LOAD_MM_PERMUTATION 1 ; name to load from
+    %assign %%i 0
+    %rep num_mmregs
+    CAT_XDEFINE m, %%i, %1_m %+ %%i
+    CAT_XDEFINE n, m %+ %%i, %%i
+    %assign %%i %%i+1
+    %endrep
+%endmacro
+
+%macro call 1
+    call %1
+    %ifdef %1_m0
+        LOAD_MM_PERMUTATION %1
+    %endif
+%endmacro
+
+; Substitutions that reduce instruction size but are functionally equivalent
+%macro add 2
+    %ifnum %2
+        %if %2==128
+            sub %1, -128
+        %else
+            add %1, %2
+        %endif
+    %else
+        add %1, %2
+    %endif
+%endmacro
+
+%macro sub 2
+    %ifnum %2
+        %if %2==128
+            add %1, -128
+        %else
+            sub %1, %2
+        %endif
+    %else
+        sub %1, %2
+    %endif
+%endmacro
+
+;=============================================================================
+; AVX abstraction layer
+;=============================================================================
+
+%assign i 0
+%rep 16
+    %if i < 8
+        CAT_XDEFINE sizeofmm, i, 8
+    %endif
+    CAT_XDEFINE sizeofxmm, i, 16
+    CAT_XDEFINE sizeofymm, i, 32
+%assign i i+1
+%endrep
+%undef i
+
+;%1 == instruction
+;%2 == 1 if float, 0 if int
+;%3 == 0 if 3-operand (xmm, xmm, xmm), 1 if 4-operand (xmm, xmm, xmm, imm)
+;%4 == number of operands given
+;%5+: operands
+%macro RUN_AVX_INSTR 6-7+
+    %if sizeof%5==32
+        v%1 %5, %6, %7
+    %else
+        %if sizeof%5==8
+            %define %%regmov movq
+        %elif %2
+            %define %%regmov movaps
+        %else
+            %define %%regmov movdqa
+        %endif
+
+        %if %4>=3+%3
+            %ifnidn %5, %6
+                %if avx_enabled && sizeof%5==16
+                    v%1 %5, %6, %7
+                %else
+                    %%regmov %5, %6
+                    %1 %5, %7
+                %endif
+            %else
+                %1 %5, %7
+            %endif
+        %elif %3
+            %1 %5, %6, %7
+        %else
+            %1 %5, %6
+        %endif
+    %endif
+%endmacro
+
+;%1 == instruction
+;%2 == 1 if float, 0 if int
+;%3 == 0 if 3-operand (xmm, xmm, xmm), 1 if 4-operand (xmm, xmm, xmm, imm)
+%macro AVX_INSTR 3
+    %macro %1 2-8 fnord, fnord, fnord, %1, %2, %3
+        %ifidn %3, fnord
+            RUN_AVX_INSTR %6, %7, %8, 2, %1, %2
+        %elifidn %4, fnord
+            RUN_AVX_INSTR %6, %7, %8, 3, %1, %2, %3
+        %elifidn %5, fnord
+            RUN_AVX_INSTR %6, %7, %8, 4, %1, %2, %3, %4
+        %else
+            RUN_AVX_INSTR %6, %7, %8, 5, %1, %2, %3, %4, %5
+        %endif
+    %endmacro
+%endmacro
+
+AVX_INSTR addpd, 1, 0
+AVX_INSTR addps, 1, 0
+AVX_INSTR addsd, 1, 0
+AVX_INSTR addss, 1, 0
+AVX_INSTR addsubpd, 1, 0
+AVX_INSTR addsubps, 1, 0
+AVX_INSTR andpd, 1, 0
+AVX_INSTR andps, 1, 0
+AVX_INSTR andnpd, 1, 0
+AVX_INSTR andnps, 1, 0
+AVX_INSTR blendpd, 1, 0
+AVX_INSTR blendps, 1, 0
+AVX_INSTR blendvpd, 1, 0
+AVX_INSTR blendvps, 1, 0
+AVX_INSTR cmppd, 1, 0
+AVX_INSTR cmpps, 1, 0
+AVX_INSTR cmpsd, 1, 0
+AVX_INSTR cmpss, 1, 0
+AVX_INSTR divpd, 1, 0
+AVX_INSTR divps, 1, 0
+AVX_INSTR divsd, 1, 0
+AVX_INSTR divss, 1, 0
+AVX_INSTR dppd, 1, 0
+AVX_INSTR dpps, 1, 0
+AVX_INSTR haddpd, 1, 0
+AVX_INSTR haddps, 1, 0
+AVX_INSTR hsubpd, 1, 0
+AVX_INSTR hsubps, 1, 0
+AVX_INSTR maxpd, 1, 0
+AVX_INSTR maxps, 1, 0
+AVX_INSTR maxsd, 1, 0
+AVX_INSTR maxss, 1, 0
+AVX_INSTR minpd, 1, 0
+AVX_INSTR minps, 1, 0
+AVX_INSTR minsd, 1, 0
+AVX_INSTR minss, 1, 0
+AVX_INSTR mpsadbw, 0, 1
+AVX_INSTR mulpd, 1, 0
+AVX_INSTR mulps, 1, 0
+AVX_INSTR mulsd, 1, 0
+AVX_INSTR mulss, 1, 0
+AVX_INSTR orpd, 1, 0
+AVX_INSTR orps, 1, 0
+AVX_INSTR packsswb, 0, 0
+AVX_INSTR packssdw, 0, 0
+AVX_INSTR packuswb, 0, 0
+AVX_INSTR packusdw, 0, 0
+AVX_INSTR paddb, 0, 0
+AVX_INSTR paddw, 0, 0
+AVX_INSTR paddd, 0, 0
+AVX_INSTR paddq, 0, 0
+AVX_INSTR paddsb, 0, 0
+AVX_INSTR paddsw, 0, 0
+AVX_INSTR paddusb, 0, 0
+AVX_INSTR paddusw, 0, 0
+AVX_INSTR palignr, 0, 1
+AVX_INSTR pand, 0, 0
+AVX_INSTR pandn, 0, 0
+AVX_INSTR pavgb, 0, 0
+AVX_INSTR pavgw, 0, 0
+AVX_INSTR pblendvb, 0, 0
+AVX_INSTR pblendw, 0, 1
+AVX_INSTR pcmpestri, 0, 0
+AVX_INSTR pcmpestrm, 0, 0
+AVX_INSTR pcmpistri, 0, 0
+AVX_INSTR pcmpistrm, 0, 0
+AVX_INSTR pcmpeqb, 0, 0
+AVX_INSTR pcmpeqw, 0, 0
+AVX_INSTR pcmpeqd, 0, 0
+AVX_INSTR pcmpeqq, 0, 0
+AVX_INSTR pcmpgtb, 0, 0
+AVX_INSTR pcmpgtw, 0, 0
+AVX_INSTR pcmpgtd, 0, 0
+AVX_INSTR pcmpgtq, 0, 0
+AVX_INSTR phaddw, 0, 0
+AVX_INSTR phaddd, 0, 0
+AVX_INSTR phaddsw, 0, 0
+AVX_INSTR phsubw, 0, 0
+AVX_INSTR phsubd, 0, 0
+AVX_INSTR phsubsw, 0, 0
+AVX_INSTR pmaddwd, 0, 0
+AVX_INSTR pmaddubsw, 0, 0
+AVX_INSTR pmaxsb, 0, 0
+AVX_INSTR pmaxsw, 0, 0
+AVX_INSTR pmaxsd, 0, 0
+AVX_INSTR pmaxub, 0, 0
+AVX_INSTR pmaxuw, 0, 0
+AVX_INSTR pmaxud, 0, 0
+AVX_INSTR pminsb, 0, 0
+AVX_INSTR pminsw, 0, 0
+AVX_INSTR pminsd, 0, 0
+AVX_INSTR pminub, 0, 0
+AVX_INSTR pminuw, 0, 0
+AVX_INSTR pminud, 0, 0
+AVX_INSTR pmulhuw, 0, 0
+AVX_INSTR pmulhrsw, 0, 0
+AVX_INSTR pmulhw, 0, 0
+AVX_INSTR pmullw, 0, 0
+AVX_INSTR pmulld, 0, 0
+AVX_INSTR pmuludq, 0, 0
+AVX_INSTR pmuldq, 0, 0
+AVX_INSTR por, 0, 0
+AVX_INSTR psadbw, 0, 0
+AVX_INSTR pshufb, 0, 0
+AVX_INSTR psignb, 0, 0
+AVX_INSTR psignw, 0, 0
+AVX_INSTR psignd, 0, 0
+AVX_INSTR psllw, 0, 0
+AVX_INSTR pslld, 0, 0
+AVX_INSTR psllq, 0, 0
+AVX_INSTR pslldq, 0, 0
+AVX_INSTR psraw, 0, 0
+AVX_INSTR psrad, 0, 0
+AVX_INSTR psrlw, 0, 0
+AVX_INSTR psrld, 0, 0
+AVX_INSTR psrlq, 0, 0
+AVX_INSTR psrldq, 0, 0
+AVX_INSTR psubb, 0, 0
+AVX_INSTR psubw, 0, 0
+AVX_INSTR psubd, 0, 0
+AVX_INSTR psubq, 0, 0
+AVX_INSTR psubsb, 0, 0
+AVX_INSTR psubsw, 0, 0
+AVX_INSTR psubusb, 0, 0
+AVX_INSTR psubusw, 0, 0
+AVX_INSTR punpckhbw, 0, 0
+AVX_INSTR punpckhwd, 0, 0
+AVX_INSTR punpckhdq, 0, 0
+AVX_INSTR punpckhqdq, 0, 0
+AVX_INSTR punpcklbw, 0, 0
+AVX_INSTR punpcklwd, 0, 0
+AVX_INSTR punpckldq, 0, 0
+AVX_INSTR punpcklqdq, 0, 0
+AVX_INSTR pxor, 0, 0
+AVX_INSTR shufps, 0, 1
+AVX_INSTR subpd, 1, 0
+AVX_INSTR subps, 1, 0
+AVX_INSTR subsd, 1, 0
+AVX_INSTR subss, 1, 0
+AVX_INSTR unpckhpd, 1, 0
+AVX_INSTR unpckhps, 1, 0
+AVX_INSTR unpcklpd, 1, 0
+AVX_INSTR unpcklps, 1, 0
+AVX_INSTR xorpd, 1, 0
+AVX_INSTR xorps, 1, 0
+
+; 3DNow instructions, for sharing code between AVX, SSE and 3DN
+AVX_INSTR pfadd, 1, 0
+AVX_INSTR pfsub, 1, 0
+AVX_INSTR pfmul, 1, 0
+
+;=============================================================================
+; Chromium extensions
+;=============================================================================
+
+%ifdef CHROMIUM
+;
+; LOAD_SYM %1 (reg), %2 (sym)
+; Copies the address to a local symbol to the specified register.
+;
+
+%macro LOAD_SYM 2
+
+%ifdef MACHO
+  call      %%geteip
+  add       %1, %2 - $
+  jmp       %%end
+%%geteip:
+  mov       %1, [rsp]
+  ret
+%%end:
+
+%else
+  lea       %1, [%2]
+%endif
+
+%endmacro
+
+;
+; MOVq %1 (xmm), %2 (reg)
+; MOVq %1 (reg), %2 (xmm)
+; Copies a general-purpose register to an XMM register, and vice versa.
+;
+%macro MOVq 2
+%if gprsize == 8
+  movq      %1, %2
+%else
+  movd      %1, %2
+%endif
+%endmacro
+
+;
+; PRIVATE
+; A flag representing the specified symbol is a private symbol. This define adds
+; a hidden flag on Linux and a private_extern flag on Mac. (We can use this
+; private_extern flag only on the latest yasm.)
+;
+%ifdef MACHO
+%define PRIVATE :private_extern
+%elifdef ELF
+%define PRIVATE :hidden
+%else
+%define PRIVATE
+%endif
+
+%endif  ; CHROMIUM
+
+%endif  ; MEDIA_BASE_SIMD_X86INC_ASM_