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Unified Diff: simd/jdclrss2-64.asm

Issue 1939823002: Update to libjpeg_turbo 1.4.90 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master
Patch Set: Response to comments Created 4 years, 7 months ago
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Index: simd/jdclrss2-64.asm
diff --git a/simd/jdclrss2-64.asm b/simd/jdclrss2-64.asm
deleted file mode 100644
index 37f74687980af5efdd56362c7b20b3045dd7b7d9..0000000000000000000000000000000000000000
--- a/simd/jdclrss2-64.asm
+++ /dev/null
@@ -1,441 +0,0 @@
-;
-; jdclrss2-64.asm - colorspace conversion (64-bit SSE2)
-;
-; Copyright 2009, 2012 Pierre Ossman <ossman@cendio.se> for Cendio AB
-; Copyright 2009, 2012 D. R. Commander
-;
-; Based on
-; x86 SIMD extension for IJG JPEG library
-; Copyright (C) 1999-2006, MIYASAKA Masaru.
-; For conditions of distribution and use, see copyright notice in jsimdext.inc
-;
-; This file should be assembled with NASM (Netwide Assembler),
-; can *not* be assembled with Microsoft's MASM or any compatible
-; assembler (including Borland's Turbo Assembler).
-; NASM is available from http://nasm.sourceforge.net/ or
-; http://sourceforge.net/project/showfiles.php?group_id=6208
-;
-; [TAB8]
-
-%include "jcolsamp.inc"
-
-; --------------------------------------------------------------------------
-;
-; Convert some rows of samples to the output colorspace.
-;
-; GLOBAL(void)
-; jsimd_ycc_rgb_convert_sse2 (JDIMENSION out_width,
-; JSAMPIMAGE input_buf, JDIMENSION input_row,
-; JSAMPARRAY output_buf, int num_rows)
-;
-
-; r10 = JDIMENSION out_width
-; r11 = JSAMPIMAGE input_buf
-; r12 = JDIMENSION input_row
-; r13 = JSAMPARRAY output_buf
-; r14 = int num_rows
-
-%define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
-%define WK_NUM 2
-
- align 16
- global EXTN(jsimd_ycc_rgb_convert_sse2) PRIVATE
-
-EXTN(jsimd_ycc_rgb_convert_sse2):
- push rbp
- mov rax,rsp ; rax = original rbp
- sub rsp, byte 4
- and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
- mov [rsp],rax
- mov rbp,rsp ; rbp = aligned rbp
- lea rsp, [wk(0)]
- collect_args
- push rbx
-
- mov ecx, r10d ; num_cols
- test rcx,rcx
- jz near .return
-
- push rcx
-
- mov rdi, r11
- mov ecx, r12d
- mov rsi, JSAMPARRAY [rdi+0*SIZEOF_JSAMPARRAY]
- mov rbx, JSAMPARRAY [rdi+1*SIZEOF_JSAMPARRAY]
- mov rdx, JSAMPARRAY [rdi+2*SIZEOF_JSAMPARRAY]
- lea rsi, [rsi+rcx*SIZEOF_JSAMPROW]
- lea rbx, [rbx+rcx*SIZEOF_JSAMPROW]
- lea rdx, [rdx+rcx*SIZEOF_JSAMPROW]
-
- pop rcx
-
- mov rdi, r13
- mov eax, r14d
- test rax,rax
- jle near .return
-.rowloop:
- push rax
- push rdi
- push rdx
- push rbx
- push rsi
- push rcx ; col
-
- mov rsi, JSAMPROW [rsi] ; inptr0
- mov rbx, JSAMPROW [rbx] ; inptr1
- mov rdx, JSAMPROW [rdx] ; inptr2
- mov rdi, JSAMPROW [rdi] ; outptr
-.columnloop:
-
- movdqa xmm5, XMMWORD [rbx] ; xmm5=Cb(0123456789ABCDEF)
- movdqa xmm1, XMMWORD [rdx] ; xmm1=Cr(0123456789ABCDEF)
-
- pcmpeqw xmm4,xmm4
- pcmpeqw xmm7,xmm7
- psrlw xmm4,BYTE_BIT
- psllw xmm7,7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..}
- movdqa xmm0,xmm4 ; xmm0=xmm4={0xFF 0x00 0xFF 0x00 ..}
-
- pand xmm4,xmm5 ; xmm4=Cb(02468ACE)=CbE
- psrlw xmm5,BYTE_BIT ; xmm5=Cb(13579BDF)=CbO
- pand xmm0,xmm1 ; xmm0=Cr(02468ACE)=CrE
- psrlw xmm1,BYTE_BIT ; xmm1=Cr(13579BDF)=CrO
-
- paddw xmm4,xmm7
- paddw xmm5,xmm7
- paddw xmm0,xmm7
- paddw xmm1,xmm7
-
- ; (Original)
- ; R = Y + 1.40200 * Cr
- ; G = Y - 0.34414 * Cb - 0.71414 * Cr
- ; B = Y + 1.77200 * Cb
- ;
- ; (This implementation)
- ; R = Y + 0.40200 * Cr + Cr
- ; G = Y - 0.34414 * Cb + 0.28586 * Cr - Cr
- ; B = Y - 0.22800 * Cb + Cb + Cb
-
- movdqa xmm2,xmm4 ; xmm2=CbE
- movdqa xmm3,xmm5 ; xmm3=CbO
- paddw xmm4,xmm4 ; xmm4=2*CbE
- paddw xmm5,xmm5 ; xmm5=2*CbO
- movdqa xmm6,xmm0 ; xmm6=CrE
- movdqa xmm7,xmm1 ; xmm7=CrO
- paddw xmm0,xmm0 ; xmm0=2*CrE
- paddw xmm1,xmm1 ; xmm1=2*CrO
-
- pmulhw xmm4,[rel PW_MF0228] ; xmm4=(2*CbE * -FIX(0.22800))
- pmulhw xmm5,[rel PW_MF0228] ; xmm5=(2*CbO * -FIX(0.22800))
- pmulhw xmm0,[rel PW_F0402] ; xmm0=(2*CrE * FIX(0.40200))
- pmulhw xmm1,[rel PW_F0402] ; xmm1=(2*CrO * FIX(0.40200))
-
- paddw xmm4,[rel PW_ONE]
- paddw xmm5,[rel PW_ONE]
- psraw xmm4,1 ; xmm4=(CbE * -FIX(0.22800))
- psraw xmm5,1 ; xmm5=(CbO * -FIX(0.22800))
- paddw xmm0,[rel PW_ONE]
- paddw xmm1,[rel PW_ONE]
- psraw xmm0,1 ; xmm0=(CrE * FIX(0.40200))
- psraw xmm1,1 ; xmm1=(CrO * FIX(0.40200))
-
- paddw xmm4,xmm2
- paddw xmm5,xmm3
- paddw xmm4,xmm2 ; xmm4=(CbE * FIX(1.77200))=(B-Y)E
- paddw xmm5,xmm3 ; xmm5=(CbO * FIX(1.77200))=(B-Y)O
- paddw xmm0,xmm6 ; xmm0=(CrE * FIX(1.40200))=(R-Y)E
- paddw xmm1,xmm7 ; xmm1=(CrO * FIX(1.40200))=(R-Y)O
-
- movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=(B-Y)E
- movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(B-Y)O
-
- movdqa xmm4,xmm2
- movdqa xmm5,xmm3
- punpcklwd xmm2,xmm6
- punpckhwd xmm4,xmm6
- pmaddwd xmm2,[rel PW_MF0344_F0285]
- pmaddwd xmm4,[rel PW_MF0344_F0285]
- punpcklwd xmm3,xmm7
- punpckhwd xmm5,xmm7
- pmaddwd xmm3,[rel PW_MF0344_F0285]
- pmaddwd xmm5,[rel PW_MF0344_F0285]
-
- paddd xmm2,[rel PD_ONEHALF]
- paddd xmm4,[rel PD_ONEHALF]
- psrad xmm2,SCALEBITS
- psrad xmm4,SCALEBITS
- paddd xmm3,[rel PD_ONEHALF]
- paddd xmm5,[rel PD_ONEHALF]
- psrad xmm3,SCALEBITS
- psrad xmm5,SCALEBITS
-
- packssdw xmm2,xmm4 ; xmm2=CbE*-FIX(0.344)+CrE*FIX(0.285)
- packssdw xmm3,xmm5 ; xmm3=CbO*-FIX(0.344)+CrO*FIX(0.285)
- psubw xmm2,xmm6 ; xmm2=CbE*-FIX(0.344)+CrE*-FIX(0.714)=(G-Y)E
- psubw xmm3,xmm7 ; xmm3=CbO*-FIX(0.344)+CrO*-FIX(0.714)=(G-Y)O
-
- movdqa xmm5, XMMWORD [rsi] ; xmm5=Y(0123456789ABCDEF)
-
- pcmpeqw xmm4,xmm4
- psrlw xmm4,BYTE_BIT ; xmm4={0xFF 0x00 0xFF 0x00 ..}
- pand xmm4,xmm5 ; xmm4=Y(02468ACE)=YE
- psrlw xmm5,BYTE_BIT ; xmm5=Y(13579BDF)=YO
-
- paddw xmm0,xmm4 ; xmm0=((R-Y)E+YE)=RE=R(02468ACE)
- paddw xmm1,xmm5 ; xmm1=((R-Y)O+YO)=RO=R(13579BDF)
- packuswb xmm0,xmm0 ; xmm0=R(02468ACE********)
- packuswb xmm1,xmm1 ; xmm1=R(13579BDF********)
-
- paddw xmm2,xmm4 ; xmm2=((G-Y)E+YE)=GE=G(02468ACE)
- paddw xmm3,xmm5 ; xmm3=((G-Y)O+YO)=GO=G(13579BDF)
- packuswb xmm2,xmm2 ; xmm2=G(02468ACE********)
- packuswb xmm3,xmm3 ; xmm3=G(13579BDF********)
-
- paddw xmm4, XMMWORD [wk(0)] ; xmm4=(YE+(B-Y)E)=BE=B(02468ACE)
- paddw xmm5, XMMWORD [wk(1)] ; xmm5=(YO+(B-Y)O)=BO=B(13579BDF)
- packuswb xmm4,xmm4 ; xmm4=B(02468ACE********)
- packuswb xmm5,xmm5 ; xmm5=B(13579BDF********)
-
-%if RGB_PIXELSIZE == 3 ; ---------------
-
- ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **)
- ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **)
- ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **)
- ; xmmG=(** ** ** ** ** ** ** ** **), xmmH=(** ** ** ** ** ** ** ** **)
-
- punpcklbw xmmA,xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E)
- punpcklbw xmmE,xmmB ; xmmE=(20 01 22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F)
- punpcklbw xmmD,xmmF ; xmmD=(11 21 13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F)
-
- movdqa xmmG,xmmA
- movdqa xmmH,xmmA
- punpcklwd xmmA,xmmE ; xmmA=(00 10 20 01 02 12 22 03 04 14 24 05 06 16 26 07)
- punpckhwd xmmG,xmmE ; xmmG=(08 18 28 09 0A 1A 2A 0B 0C 1C 2C 0D 0E 1E 2E 0F)
-
- psrldq xmmH,2 ; xmmH=(02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E -- --)
- psrldq xmmE,2 ; xmmE=(22 03 24 05 26 07 28 09 2A 0B 2C 0D 2E 0F -- --)
-
- movdqa xmmC,xmmD
- movdqa xmmB,xmmD
- punpcklwd xmmD,xmmH ; xmmD=(11 21 02 12 13 23 04 14 15 25 06 16 17 27 08 18)
- punpckhwd xmmC,xmmH ; xmmC=(19 29 0A 1A 1B 2B 0C 1C 1D 2D 0E 1E 1F 2F -- --)
-
- psrldq xmmB,2 ; xmmB=(13 23 15 25 17 27 19 29 1B 2B 1D 2D 1F 2F -- --)
-
- movdqa xmmF,xmmE
- punpcklwd xmmE,xmmB ; xmmE=(22 03 13 23 24 05 15 25 26 07 17 27 28 09 19 29)
- punpckhwd xmmF,xmmB ; xmmF=(2A 0B 1B 2B 2C 0D 1D 2D 2E 0F 1F 2F -- -- -- --)
-
- pshufd xmmH,xmmA,0x4E; xmmH=(04 14 24 05 06 16 26 07 00 10 20 01 02 12 22 03)
- movdqa xmmB,xmmE
- punpckldq xmmA,xmmD ; xmmA=(00 10 20 01 11 21 02 12 02 12 22 03 13 23 04 14)
- punpckldq xmmE,xmmH ; xmmE=(22 03 13 23 04 14 24 05 24 05 15 25 06 16 26 07)
- punpckhdq xmmD,xmmB ; xmmD=(15 25 06 16 26 07 17 27 17 27 08 18 28 09 19 29)
-
- pshufd xmmH,xmmG,0x4E; xmmH=(0C 1C 2C 0D 0E 1E 2E 0F 08 18 28 09 0A 1A 2A 0B)
- movdqa xmmB,xmmF
- punpckldq xmmG,xmmC ; xmmG=(08 18 28 09 19 29 0A 1A 0A 1A 2A 0B 1B 2B 0C 1C)
- punpckldq xmmF,xmmH ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 2C 0D 1D 2D 0E 1E 2E 0F)
- punpckhdq xmmC,xmmB ; xmmC=(1D 2D 0E 1E 2E 0F 1F 2F 1F 2F -- -- -- -- -- --)
-
- punpcklqdq xmmA,xmmE ; xmmA=(00 10 20 01 11 21 02 12 22 03 13 23 04 14 24 05)
- punpcklqdq xmmD,xmmG ; xmmD=(15 25 06 16 26 07 17 27 08 18 28 09 19 29 0A 1A)
- punpcklqdq xmmF,xmmC ; xmmF=(2A 0B 1B 2B 0C 1C 2C 0D 1D 2D 0E 1E 2E 0F 1F 2F)
-
- cmp rcx, byte SIZEOF_XMMWORD
- jb short .column_st32
-
- test rdi, SIZEOF_XMMWORD-1
- jnz short .out1
- ; --(aligned)-------------------
- movntdq XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movntdq XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- movntdq XMMWORD [rdi+2*SIZEOF_XMMWORD], xmmF
- jmp short .out0
-.out1: ; --(unaligned)-----------------
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movdqu XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- movdqu XMMWORD [rdi+2*SIZEOF_XMMWORD], xmmF
-.out0:
- add rdi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr
- sub rcx, byte SIZEOF_XMMWORD
- jz near .nextrow
-
- add rsi, byte SIZEOF_XMMWORD ; inptr0
- add rbx, byte SIZEOF_XMMWORD ; inptr1
- add rdx, byte SIZEOF_XMMWORD ; inptr2
- jmp near .columnloop
-
-.column_st32:
- lea rcx, [rcx+rcx*2] ; imul ecx, RGB_PIXELSIZE
- cmp rcx, byte 2*SIZEOF_XMMWORD
- jb short .column_st16
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movdqu XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- add rdi, byte 2*SIZEOF_XMMWORD ; outptr
- movdqa xmmA,xmmF
- sub rcx, byte 2*SIZEOF_XMMWORD
- jmp short .column_st15
-.column_st16:
- cmp rcx, byte SIZEOF_XMMWORD
- jb short .column_st15
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- add rdi, byte SIZEOF_XMMWORD ; outptr
- movdqa xmmA,xmmD
- sub rcx, byte SIZEOF_XMMWORD
-.column_st15:
- ; Store the lower 8 bytes of xmmA to the output when it has enough
- ; space.
- cmp rcx, byte SIZEOF_MMWORD
- jb short .column_st7
- movq XMM_MMWORD [rdi], xmmA
- add rdi, byte SIZEOF_MMWORD
- sub rcx, byte SIZEOF_MMWORD
- psrldq xmmA, SIZEOF_MMWORD
-.column_st7:
- ; Store the lower 4 bytes of xmmA to the output when it has enough
- ; space.
- cmp rcx, byte SIZEOF_DWORD
- jb short .column_st3
- movd XMM_DWORD [rdi], xmmA
- add rdi, byte SIZEOF_DWORD
- sub rcx, byte SIZEOF_DWORD
- psrldq xmmA, SIZEOF_DWORD
-.column_st3:
- ; Store the lower 2 bytes of rax to the output when it has enough
- ; space.
- movd eax, xmmA
- cmp rcx, byte SIZEOF_WORD
- jb short .column_st1
- mov WORD [rdi], ax
- add rdi, byte SIZEOF_WORD
- sub rcx, byte SIZEOF_WORD
- shr rax, 16
-.column_st1:
- ; Store the lower 1 byte of rax to the output when it has enough
- ; space.
- test rcx, rcx
- jz short .nextrow
- mov BYTE [rdi], al
-
-%else ; RGB_PIXELSIZE == 4 ; -----------
-
-%ifdef RGBX_FILLER_0XFF
- pcmpeqb xmm6,xmm6 ; xmm6=XE=X(02468ACE********)
- pcmpeqb xmm7,xmm7 ; xmm7=XO=X(13579BDF********)
-%else
- pxor xmm6,xmm6 ; xmm6=XE=X(02468ACE********)
- pxor xmm7,xmm7 ; xmm7=XO=X(13579BDF********)
-%endif
- ; xmmA=(00 02 04 06 08 0A 0C 0E **), xmmB=(01 03 05 07 09 0B 0D 0F **)
- ; xmmC=(10 12 14 16 18 1A 1C 1E **), xmmD=(11 13 15 17 19 1B 1D 1F **)
- ; xmmE=(20 22 24 26 28 2A 2C 2E **), xmmF=(21 23 25 27 29 2B 2D 2F **)
- ; xmmG=(30 32 34 36 38 3A 3C 3E **), xmmH=(31 33 35 37 39 3B 3D 3F **)
-
- punpcklbw xmmA,xmmC ; xmmA=(00 10 02 12 04 14 06 16 08 18 0A 1A 0C 1C 0E 1E)
- punpcklbw xmmE,xmmG ; xmmE=(20 30 22 32 24 34 26 36 28 38 2A 3A 2C 3C 2E 3E)
- punpcklbw xmmB,xmmD ; xmmB=(01 11 03 13 05 15 07 17 09 19 0B 1B 0D 1D 0F 1F)
- punpcklbw xmmF,xmmH ; xmmF=(21 31 23 33 25 35 27 37 29 39 2B 3B 2D 3D 2F 3F)
-
- movdqa xmmC,xmmA
- punpcklwd xmmA,xmmE ; xmmA=(00 10 20 30 02 12 22 32 04 14 24 34 06 16 26 36)
- punpckhwd xmmC,xmmE ; xmmC=(08 18 28 38 0A 1A 2A 3A 0C 1C 2C 3C 0E 1E 2E 3E)
- movdqa xmmG,xmmB
- punpcklwd xmmB,xmmF ; xmmB=(01 11 21 31 03 13 23 33 05 15 25 35 07 17 27 37)
- punpckhwd xmmG,xmmF ; xmmG=(09 19 29 39 0B 1B 2B 3B 0D 1D 2D 3D 0F 1F 2F 3F)
-
- movdqa xmmD,xmmA
- punpckldq xmmA,xmmB ; xmmA=(00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33)
- punpckhdq xmmD,xmmB ; xmmD=(04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37)
- movdqa xmmH,xmmC
- punpckldq xmmC,xmmG ; xmmC=(08 18 28 38 09 19 29 39 0A 1A 2A 3A 0B 1B 2B 3B)
- punpckhdq xmmH,xmmG ; xmmH=(0C 1C 2C 3C 0D 1D 2D 3D 0E 1E 2E 3E 0F 1F 2F 3F)
-
- cmp rcx, byte SIZEOF_XMMWORD
- jb short .column_st32
-
- test rdi, SIZEOF_XMMWORD-1
- jnz short .out1
- ; --(aligned)-------------------
- movntdq XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movntdq XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- movntdq XMMWORD [rdi+2*SIZEOF_XMMWORD], xmmC
- movntdq XMMWORD [rdi+3*SIZEOF_XMMWORD], xmmH
- jmp short .out0
-.out1: ; --(unaligned)-----------------
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movdqu XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- movdqu XMMWORD [rdi+2*SIZEOF_XMMWORD], xmmC
- movdqu XMMWORD [rdi+3*SIZEOF_XMMWORD], xmmH
-.out0:
- add rdi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr
- sub rcx, byte SIZEOF_XMMWORD
- jz near .nextrow
-
- add rsi, byte SIZEOF_XMMWORD ; inptr0
- add rbx, byte SIZEOF_XMMWORD ; inptr1
- add rdx, byte SIZEOF_XMMWORD ; inptr2
- jmp near .columnloop
-
-.column_st32:
- cmp rcx, byte SIZEOF_XMMWORD/2
- jb short .column_st16
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- movdqu XMMWORD [rdi+1*SIZEOF_XMMWORD], xmmD
- add rdi, byte 2*SIZEOF_XMMWORD ; outptr
- movdqa xmmA,xmmC
- movdqa xmmD,xmmH
- sub rcx, byte SIZEOF_XMMWORD/2
-.column_st16:
- cmp rcx, byte SIZEOF_XMMWORD/4
- jb short .column_st15
- movdqu XMMWORD [rdi+0*SIZEOF_XMMWORD], xmmA
- add rdi, byte SIZEOF_XMMWORD ; outptr
- movdqa xmmA,xmmD
- sub rcx, byte SIZEOF_XMMWORD/4
-.column_st15:
- ; Store two pixels (8 bytes) of xmmA to the output when it has enough
- ; space.
- cmp rcx, byte SIZEOF_XMMWORD/8
- jb short .column_st7
- movq MMWORD [rdi], xmmA
- add rdi, byte SIZEOF_XMMWORD/8*4
- sub rcx, byte SIZEOF_XMMWORD/8
- psrldq xmmA, SIZEOF_XMMWORD/8*4
-.column_st7:
- ; Store one pixel (4 bytes) of xmmA to the output when it has enough
- ; space.
- test rcx, rcx
- jz short .nextrow
- movd XMM_DWORD [rdi], xmmA
-
-%endif ; RGB_PIXELSIZE ; ---------------
-
-.nextrow:
- pop rcx
- pop rsi
- pop rbx
- pop rdx
- pop rdi
- pop rax
-
- add rsi, byte SIZEOF_JSAMPROW
- add rbx, byte SIZEOF_JSAMPROW
- add rdx, byte SIZEOF_JSAMPROW
- add rdi, byte SIZEOF_JSAMPROW ; output_buf
- dec rax ; num_rows
- jg near .rowloop
-
- sfence ; flush the write buffer
-
-.return:
- pop rbx
- uncollect_args
- mov rsp,rbp ; rsp <- aligned rbp
- pop rsp ; rsp <- original rbp
- pop rbp
- ret
-
-; For some reason, the OS X linker does not honor the request to align the
-; segment unless we do this.
- align 16
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