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Diffstat (limited to 'media/libjpeg/simd/i386/jdmrgext-sse2.asm')
-rw-r--r--media/libjpeg/simd/i386/jdmrgext-sse2.asm517
1 files changed, 517 insertions, 0 deletions
diff --git a/media/libjpeg/simd/i386/jdmrgext-sse2.asm b/media/libjpeg/simd/i386/jdmrgext-sse2.asm
new file mode 100644
index 0000000000..c113dc4d27
--- /dev/null
+++ b/media/libjpeg/simd/i386/jdmrgext-sse2.asm
@@ -0,0 +1,517 @@
+;
+; jdmrgext.asm - merged upsampling/color conversion (SSE2)
+;
+; Copyright 2009, 2012 Pierre Ossman <ossman@cendio.se> for Cendio AB
+; Copyright (C) 2012, 2016, D. R. Commander.
+;
+; Based on the 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
+
+%include "jcolsamp.inc"
+
+; --------------------------------------------------------------------------
+;
+; Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
+;
+; GLOBAL(void)
+; jsimd_h2v1_merged_upsample_sse2(JDIMENSION output_width,
+; JSAMPIMAGE input_buf,
+; JDIMENSION in_row_group_ctr,
+; JSAMPARRAY output_buf);
+;
+
+%define output_width(b) (b) + 8 ; JDIMENSION output_width
+%define input_buf(b) (b) + 12 ; JSAMPIMAGE input_buf
+%define in_row_group_ctr(b) (b) + 16 ; JDIMENSION in_row_group_ctr
+%define output_buf(b) (b) + 20 ; JSAMPARRAY output_buf
+
+%define original_ebp ebp + 0
+%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD
+ ; xmmword wk[WK_NUM]
+%define WK_NUM 3
+%define gotptr wk(0) - SIZEOF_POINTER ; void * gotptr
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_h2v1_merged_upsample_sse2)
+
+EXTN(jsimd_h2v1_merged_upsample_sse2):
+ push ebp
+ mov eax, esp ; eax = original ebp
+ sub esp, byte 4
+ and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
+ mov [esp], eax
+ mov ebp, esp ; ebp = aligned ebp
+ lea esp, [wk(0)]
+ pushpic eax ; make a room for GOT address
+ push ebx
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ get_GOT ebx ; get GOT address
+ movpic POINTER [gotptr], ebx ; save GOT address
+
+ mov ecx, JDIMENSION [output_width(eax)] ; col
+ test ecx, ecx
+ jz near .return
+
+ push ecx
+
+ mov edi, JSAMPIMAGE [input_buf(eax)]
+ mov ecx, JDIMENSION [in_row_group_ctr(eax)]
+ mov esi, JSAMPARRAY [edi+0*SIZEOF_JSAMPARRAY]
+ mov ebx, JSAMPARRAY [edi+1*SIZEOF_JSAMPARRAY]
+ mov edx, JSAMPARRAY [edi+2*SIZEOF_JSAMPARRAY]
+ mov edi, JSAMPARRAY [output_buf(eax)]
+ mov esi, JSAMPROW [esi+ecx*SIZEOF_JSAMPROW] ; inptr0
+ mov ebx, JSAMPROW [ebx+ecx*SIZEOF_JSAMPROW] ; inptr1
+ mov edx, JSAMPROW [edx+ecx*SIZEOF_JSAMPROW] ; inptr2
+ mov edi, JSAMPROW [edi] ; outptr
+
+ pop ecx ; col
+
+ alignx 16, 7
+.columnloop:
+ movpic eax, POINTER [gotptr] ; load GOT address (eax)
+
+ movdqa xmm6, XMMWORD [ebx] ; xmm6=Cb(0123456789ABCDEF)
+ movdqa xmm7, XMMWORD [edx] ; xmm7=Cr(0123456789ABCDEF)
+
+ pxor xmm1, xmm1 ; xmm1=(all 0's)
+ pcmpeqw xmm3, xmm3
+ psllw xmm3, 7 ; xmm3={0xFF80 0xFF80 0xFF80 0xFF80 ..}
+
+ movdqa xmm4, xmm6
+ punpckhbw xmm6, xmm1 ; xmm6=Cb(89ABCDEF)=CbH
+ punpcklbw xmm4, xmm1 ; xmm4=Cb(01234567)=CbL
+ movdqa xmm0, xmm7
+ punpckhbw xmm7, xmm1 ; xmm7=Cr(89ABCDEF)=CrH
+ punpcklbw xmm0, xmm1 ; xmm0=Cr(01234567)=CrL
+
+ paddw xmm6, xmm3
+ paddw xmm4, xmm3
+ paddw xmm7, xmm3
+ paddw xmm0, xmm3
+
+ ; (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 xmm5, xmm6 ; xmm5=CbH
+ movdqa xmm2, xmm4 ; xmm2=CbL
+ paddw xmm6, xmm6 ; xmm6=2*CbH
+ paddw xmm4, xmm4 ; xmm4=2*CbL
+ movdqa xmm1, xmm7 ; xmm1=CrH
+ movdqa xmm3, xmm0 ; xmm3=CrL
+ paddw xmm7, xmm7 ; xmm7=2*CrH
+ paddw xmm0, xmm0 ; xmm0=2*CrL
+
+ pmulhw xmm6, [GOTOFF(eax,PW_MF0228)] ; xmm6=(2*CbH * -FIX(0.22800))
+ pmulhw xmm4, [GOTOFF(eax,PW_MF0228)] ; xmm4=(2*CbL * -FIX(0.22800))
+ pmulhw xmm7, [GOTOFF(eax,PW_F0402)] ; xmm7=(2*CrH * FIX(0.40200))
+ pmulhw xmm0, [GOTOFF(eax,PW_F0402)] ; xmm0=(2*CrL * FIX(0.40200))
+
+ paddw xmm6, [GOTOFF(eax,PW_ONE)]
+ paddw xmm4, [GOTOFF(eax,PW_ONE)]
+ psraw xmm6, 1 ; xmm6=(CbH * -FIX(0.22800))
+ psraw xmm4, 1 ; xmm4=(CbL * -FIX(0.22800))
+ paddw xmm7, [GOTOFF(eax,PW_ONE)]
+ paddw xmm0, [GOTOFF(eax,PW_ONE)]
+ psraw xmm7, 1 ; xmm7=(CrH * FIX(0.40200))
+ psraw xmm0, 1 ; xmm0=(CrL * FIX(0.40200))
+
+ paddw xmm6, xmm5
+ paddw xmm4, xmm2
+ paddw xmm6, xmm5 ; xmm6=(CbH * FIX(1.77200))=(B-Y)H
+ paddw xmm4, xmm2 ; xmm4=(CbL * FIX(1.77200))=(B-Y)L
+ paddw xmm7, xmm1 ; xmm7=(CrH * FIX(1.40200))=(R-Y)H
+ paddw xmm0, xmm3 ; xmm0=(CrL * FIX(1.40200))=(R-Y)L
+
+ movdqa XMMWORD [wk(0)], xmm6 ; wk(0)=(B-Y)H
+ movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=(R-Y)H
+
+ movdqa xmm6, xmm5
+ movdqa xmm7, xmm2
+ punpcklwd xmm5, xmm1
+ punpckhwd xmm6, xmm1
+ pmaddwd xmm5, [GOTOFF(eax,PW_MF0344_F0285)]
+ pmaddwd xmm6, [GOTOFF(eax,PW_MF0344_F0285)]
+ punpcklwd xmm2, xmm3
+ punpckhwd xmm7, xmm3
+ pmaddwd xmm2, [GOTOFF(eax,PW_MF0344_F0285)]
+ pmaddwd xmm7, [GOTOFF(eax,PW_MF0344_F0285)]
+
+ paddd xmm5, [GOTOFF(eax,PD_ONEHALF)]
+ paddd xmm6, [GOTOFF(eax,PD_ONEHALF)]
+ psrad xmm5, SCALEBITS
+ psrad xmm6, SCALEBITS
+ paddd xmm2, [GOTOFF(eax,PD_ONEHALF)]
+ paddd xmm7, [GOTOFF(eax,PD_ONEHALF)]
+ psrad xmm2, SCALEBITS
+ psrad xmm7, SCALEBITS
+
+ packssdw xmm5, xmm6 ; xmm5=CbH*-FIX(0.344)+CrH*FIX(0.285)
+ packssdw xmm2, xmm7 ; xmm2=CbL*-FIX(0.344)+CrL*FIX(0.285)
+ psubw xmm5, xmm1 ; xmm5=CbH*-FIX(0.344)+CrH*-FIX(0.714)=(G-Y)H
+ psubw xmm2, xmm3 ; xmm2=CbL*-FIX(0.344)+CrL*-FIX(0.714)=(G-Y)L
+
+ movdqa XMMWORD [wk(2)], xmm5 ; wk(2)=(G-Y)H
+
+ mov al, 2 ; Yctr
+ jmp short .Yloop_1st
+ alignx 16, 7
+
+.Yloop_2nd:
+ movdqa xmm0, XMMWORD [wk(1)] ; xmm0=(R-Y)H
+ movdqa xmm2, XMMWORD [wk(2)] ; xmm2=(G-Y)H
+ movdqa xmm4, XMMWORD [wk(0)] ; xmm4=(B-Y)H
+ alignx 16, 7
+
+.Yloop_1st:
+ movdqa xmm7, XMMWORD [esi] ; xmm7=Y(0123456789ABCDEF)
+
+ pcmpeqw xmm6, xmm6
+ psrlw xmm6, BYTE_BIT ; xmm6={0xFF 0x00 0xFF 0x00 ..}
+ pand xmm6, xmm7 ; xmm6=Y(02468ACE)=YE
+ psrlw xmm7, BYTE_BIT ; xmm7=Y(13579BDF)=YO
+
+ movdqa xmm1, xmm0 ; xmm1=xmm0=(R-Y)(L/H)
+ movdqa xmm3, xmm2 ; xmm3=xmm2=(G-Y)(L/H)
+ movdqa xmm5, xmm4 ; xmm5=xmm4=(B-Y)(L/H)
+
+ paddw xmm0, xmm6 ; xmm0=((R-Y)+YE)=RE=R(02468ACE)
+ paddw xmm1, xmm7 ; xmm1=((R-Y)+YO)=RO=R(13579BDF)
+ packuswb xmm0, xmm0 ; xmm0=R(02468ACE********)
+ packuswb xmm1, xmm1 ; xmm1=R(13579BDF********)
+
+ paddw xmm2, xmm6 ; xmm2=((G-Y)+YE)=GE=G(02468ACE)
+ paddw xmm3, xmm7 ; xmm3=((G-Y)+YO)=GO=G(13579BDF)
+ packuswb xmm2, xmm2 ; xmm2=G(02468ACE********)
+ packuswb xmm3, xmm3 ; xmm3=G(13579BDF********)
+
+ paddw xmm4, xmm6 ; xmm4=((B-Y)+YE)=BE=B(02468ACE)
+ paddw xmm5, xmm7 ; xmm5=((B-Y)+YO)=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 ecx, byte SIZEOF_XMMWORD
+ jb short .column_st32
+
+ test edi, SIZEOF_XMMWORD-1
+ jnz short .out1
+ ; --(aligned)-------------------
+ movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF
+ jmp short .out0
+.out1: ; --(unaligned)-----------------
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmF
+.out0:
+ add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr
+ sub ecx, byte SIZEOF_XMMWORD
+ jz near .endcolumn
+
+ add esi, byte SIZEOF_XMMWORD ; inptr0
+ dec al ; Yctr
+ jnz near .Yloop_2nd
+
+ add ebx, byte SIZEOF_XMMWORD ; inptr1
+ add edx, byte SIZEOF_XMMWORD ; inptr2
+ jmp near .columnloop
+ alignx 16, 7
+
+.column_st32:
+ lea ecx, [ecx+ecx*2] ; imul ecx, RGB_PIXELSIZE
+ cmp ecx, byte 2*SIZEOF_XMMWORD
+ jb short .column_st16
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ add edi, byte 2*SIZEOF_XMMWORD ; outptr
+ movdqa xmmA, xmmF
+ sub ecx, byte 2*SIZEOF_XMMWORD
+ jmp short .column_st15
+.column_st16:
+ cmp ecx, byte SIZEOF_XMMWORD
+ jb short .column_st15
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ add edi, byte SIZEOF_XMMWORD ; outptr
+ movdqa xmmA, xmmD
+ sub ecx, byte SIZEOF_XMMWORD
+.column_st15:
+ ; Store the lower 8 bytes of xmmA to the output when it has enough
+ ; space.
+ cmp ecx, byte SIZEOF_MMWORD
+ jb short .column_st7
+ movq XMM_MMWORD [edi], xmmA
+ add edi, byte SIZEOF_MMWORD
+ sub ecx, 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 ecx, byte SIZEOF_DWORD
+ jb short .column_st3
+ movd XMM_DWORD [edi], xmmA
+ add edi, byte SIZEOF_DWORD
+ sub ecx, byte SIZEOF_DWORD
+ psrldq xmmA, SIZEOF_DWORD
+.column_st3:
+ ; Store the lower 2 bytes of eax to the output when it has enough
+ ; space.
+ movd eax, xmmA
+ cmp ecx, byte SIZEOF_WORD
+ jb short .column_st1
+ mov word [edi], ax
+ add edi, byte SIZEOF_WORD
+ sub ecx, byte SIZEOF_WORD
+ shr eax, 16
+.column_st1:
+ ; Store the lower 1 byte of eax to the output when it has enough
+ ; space.
+ test ecx, ecx
+ jz short .endcolumn
+ mov byte [edi], 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 ecx, byte SIZEOF_XMMWORD
+ jb short .column_st32
+
+ test edi, SIZEOF_XMMWORD-1
+ jnz short .out1
+ ; --(aligned)-------------------
+ movntdq XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movntdq XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ movntdq XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC
+ movntdq XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH
+ jmp short .out0
+.out1: ; --(unaligned)-----------------
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ movdqu XMMWORD [edi+2*SIZEOF_XMMWORD], xmmC
+ movdqu XMMWORD [edi+3*SIZEOF_XMMWORD], xmmH
+.out0:
+ add edi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; outptr
+ sub ecx, byte SIZEOF_XMMWORD
+ jz near .endcolumn
+
+ add esi, byte SIZEOF_XMMWORD ; inptr0
+ dec al ; Yctr
+ jnz near .Yloop_2nd
+
+ add ebx, byte SIZEOF_XMMWORD ; inptr1
+ add edx, byte SIZEOF_XMMWORD ; inptr2
+ jmp near .columnloop
+ alignx 16, 7
+
+.column_st32:
+ cmp ecx, byte SIZEOF_XMMWORD/2
+ jb short .column_st16
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ movdqu XMMWORD [edi+1*SIZEOF_XMMWORD], xmmD
+ add edi, byte 2*SIZEOF_XMMWORD ; outptr
+ movdqa xmmA, xmmC
+ movdqa xmmD, xmmH
+ sub ecx, byte SIZEOF_XMMWORD/2
+.column_st16:
+ cmp ecx, byte SIZEOF_XMMWORD/4
+ jb short .column_st15
+ movdqu XMMWORD [edi+0*SIZEOF_XMMWORD], xmmA
+ add edi, byte SIZEOF_XMMWORD ; outptr
+ movdqa xmmA, xmmD
+ sub ecx, byte SIZEOF_XMMWORD/4
+.column_st15:
+ ; Store two pixels (8 bytes) of xmmA to the output when it has enough
+ ; space.
+ cmp ecx, byte SIZEOF_XMMWORD/8
+ jb short .column_st7
+ movq XMM_MMWORD [edi], xmmA
+ add edi, byte SIZEOF_XMMWORD/8*4
+ sub ecx, 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 ecx, ecx
+ jz short .endcolumn
+ movd XMM_DWORD [edi], xmmA
+
+%endif ; RGB_PIXELSIZE ; ---------------
+
+.endcolumn:
+ sfence ; flush the write buffer
+
+.return:
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+ pop ebx
+ mov esp, ebp ; esp <- aligned ebp
+ pop esp ; esp <- original ebp
+ pop ebp
+ ret
+
+; --------------------------------------------------------------------------
+;
+; Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
+;
+; GLOBAL(void)
+; jsimd_h2v2_merged_upsample_sse2(JDIMENSION output_width,
+; JSAMPIMAGE input_buf,
+; JDIMENSION in_row_group_ctr,
+; JSAMPARRAY output_buf);
+;
+
+%define output_width(b) (b) + 8 ; JDIMENSION output_width
+%define input_buf(b) (b) + 12 ; JSAMPIMAGE input_buf
+%define in_row_group_ctr(b) (b) + 16 ; JDIMENSION in_row_group_ctr
+%define output_buf(b) (b) + 20 ; JSAMPARRAY output_buf
+
+ align 32
+ GLOBAL_FUNCTION(jsimd_h2v2_merged_upsample_sse2)
+
+EXTN(jsimd_h2v2_merged_upsample_sse2):
+ push ebp
+ mov ebp, esp
+ push ebx
+; push ecx ; need not be preserved
+; push edx ; need not be preserved
+ push esi
+ push edi
+
+ mov eax, POINTER [output_width(ebp)]
+
+ mov edi, JSAMPIMAGE [input_buf(ebp)]
+ mov ecx, JDIMENSION [in_row_group_ctr(ebp)]
+ mov esi, JSAMPARRAY [edi+0*SIZEOF_JSAMPARRAY]
+ mov ebx, JSAMPARRAY [edi+1*SIZEOF_JSAMPARRAY]
+ mov edx, JSAMPARRAY [edi+2*SIZEOF_JSAMPARRAY]
+ mov edi, JSAMPARRAY [output_buf(ebp)]
+ lea esi, [esi+ecx*SIZEOF_JSAMPROW]
+
+ push edx ; inptr2
+ push ebx ; inptr1
+ push esi ; inptr00
+ mov ebx, esp
+
+ push edi ; output_buf (outptr0)
+ push ecx ; in_row_group_ctr
+ push ebx ; input_buf
+ push eax ; output_width
+
+ call near EXTN(jsimd_h2v1_merged_upsample_sse2)
+
+ add esi, byte SIZEOF_JSAMPROW ; inptr01
+ add edi, byte SIZEOF_JSAMPROW ; outptr1
+ mov POINTER [ebx+0*SIZEOF_POINTER], esi
+ mov POINTER [ebx-1*SIZEOF_POINTER], edi
+
+ call near EXTN(jsimd_h2v1_merged_upsample_sse2)
+
+ add esp, byte 7*SIZEOF_DWORD
+
+ pop edi
+ pop esi
+; pop edx ; need not be preserved
+; pop ecx ; need not be preserved
+ pop ebx
+ pop ebp
+ ret
+
+; For some reason, the OS X linker does not honor the request to align the
+; segment unless we do this.
+ align 32
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