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Unified Diff: simd/jdmrgext-sse2-64.asm

Issue 1934113002: Update libjpeg_turbo to 1.4.90 from https://github.com/libjpeg-turbo/ (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master
Patch Set: Created 4 years, 8 months ago
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Index: simd/jdmrgext-sse2-64.asm
diff --git a/simd/jdmrgext-sse2-64.asm b/simd/jdmrgext-sse2-64.asm
new file mode 100644
index 0000000000000000000000000000000000000000..989d7f17c24e4bae1c4102d8ec8889fe5a390faf
--- /dev/null
+++ b/simd/jdmrgext-sse2-64.asm
@@ -0,0 +1,538 @@
+;
+; jdmrgext.asm - merged upsampling/color 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"
+
+; --------------------------------------------------------------------------
+;
+; 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);
+;
+
+; r10 = JDIMENSION output_width
+; r11 = JSAMPIMAGE input_buf
+; r12 = JDIMENSION in_row_group_ctr
+; r13 = JSAMPARRAY output_buf
+
+%define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
+%define WK_NUM 3
+
+ align 16
+ global EXTN(jsimd_h2v1_merged_upsample_sse2)
+
+EXTN(jsimd_h2v1_merged_upsample_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 ; col
+ 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]
+ mov rdi, r13
+ mov rsi, JSAMPROW [rsi+rcx*SIZEOF_JSAMPROW] ; inptr0
+ mov rbx, JSAMPROW [rbx+rcx*SIZEOF_JSAMPROW] ; inptr1
+ mov rdx, JSAMPROW [rdx+rcx*SIZEOF_JSAMPROW] ; inptr2
+ mov rdi, JSAMPROW [rdi] ; outptr
+
+ pop rcx ; col
+
+.columnloop:
+
+ movdqa xmm6, XMMWORD [rbx] ; xmm6=Cb(0123456789ABCDEF)
+ movdqa xmm7, XMMWORD [rdx] ; 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,[rel PW_MF0228] ; xmm6=(2*CbH * -FIX(0.22800))
+ pmulhw xmm4,[rel PW_MF0228] ; xmm4=(2*CbL * -FIX(0.22800))
+ pmulhw xmm7,[rel PW_F0402] ; xmm7=(2*CrH * FIX(0.40200))
+ pmulhw xmm0,[rel PW_F0402] ; xmm0=(2*CrL * FIX(0.40200))
+
+ paddw xmm6,[rel PW_ONE]
+ paddw xmm4,[rel PW_ONE]
+ psraw xmm6,1 ; xmm6=(CbH * -FIX(0.22800))
+ psraw xmm4,1 ; xmm4=(CbL * -FIX(0.22800))
+ paddw xmm7,[rel PW_ONE]
+ paddw xmm0,[rel 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,[rel PW_MF0344_F0285]
+ pmaddwd xmm6,[rel PW_MF0344_F0285]
+ punpcklwd xmm2,xmm3
+ punpckhwd xmm7,xmm3
+ pmaddwd xmm2,[rel PW_MF0344_F0285]
+ pmaddwd xmm7,[rel PW_MF0344_F0285]
+
+ paddd xmm5,[rel PD_ONEHALF]
+ paddd xmm6,[rel PD_ONEHALF]
+ psrad xmm5,SCALEBITS
+ psrad xmm6,SCALEBITS
+ paddd xmm2,[rel PD_ONEHALF]
+ paddd xmm7,[rel 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
+
+.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
+
+.Yloop_1st:
+ movdqa xmm7, XMMWORD [rsi] ; 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 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 .endcolumn
+
+ add rsi, byte SIZEOF_XMMWORD ; inptr0
+ dec al ; Yctr
+ jnz near .Yloop_2nd
+
+ 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 .endcolumn
+ 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 .endcolumn
+
+ add rsi, byte SIZEOF_XMMWORD ; inptr0
+ dec al ; Yctr
+ jnz near .Yloop_2nd
+
+ 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 XMM_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 .endcolumn
+ movd XMM_DWORD [rdi], xmmA
+
+%endif ; RGB_PIXELSIZE ; ---------------
+
+.endcolumn:
+ sfence ; flush the write buffer
+
+.return:
+ pop rbx
+ uncollect_args
+ mov rsp,rbp ; rsp <- aligned rbp
+ pop rsp ; rsp <- original rbp
+ pop rbp
+ 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);
+;
+
+; r10 = JDIMENSION output_width
+; r11 = JSAMPIMAGE input_buf
+; r12 = JDIMENSION in_row_group_ctr
+; r13 = JSAMPARRAY output_buf
+
+ align 16
+ global EXTN(jsimd_h2v2_merged_upsample_sse2)
+
+EXTN(jsimd_h2v2_merged_upsample_sse2):
+ push rbp
+ mov rax,rsp
+ mov rbp,rsp
+ collect_args
+ push rbx
+
+ mov eax, r10d
+
+ 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]
+ mov rdi, r13
+ lea rsi, [rsi+rcx*SIZEOF_JSAMPROW]
+
+ push rdx ; inptr2
+ push rbx ; inptr1
+ push rsi ; inptr00
+ mov rbx,rsp
+
+ push rdi
+ push rcx
+ push rax
+
+ %ifdef WIN64
+ mov r8, rcx
+ mov r9, rdi
+ mov rcx, rax
+ mov rdx, rbx
+ %else
+ mov rdx, rcx
+ mov rcx, rdi
+ mov rdi, rax
+ mov rsi, rbx
+ %endif
+
+ call EXTN(jsimd_h2v1_merged_upsample_sse2)
+
+ pop rax
+ pop rcx
+ pop rdi
+ pop rsi
+ pop rbx
+ pop rdx
+
+ add rdi, byte SIZEOF_JSAMPROW ; outptr1
+ add rsi, byte SIZEOF_JSAMPROW ; inptr01
+
+ push rdx ; inptr2
+ push rbx ; inptr1
+ push rsi ; inptr00
+ mov rbx,rsp
+
+ push rdi
+ push rcx
+ push rax
+
+ %ifdef WIN64
+ mov r8, rcx
+ mov r9, rdi
+ mov rcx, rax
+ mov rdx, rbx
+ %else
+ mov rdx, rcx
+ mov rcx, rdi
+ mov rdi, rax
+ mov rsi, rbx
+ %endif
+
+ call EXTN(jsimd_h2v1_merged_upsample_sse2)
+
+ pop rax
+ pop rcx
+ pop rdi
+ pop rsi
+ pop rbx
+ pop rdx
+
+ pop rbx
+ uncollect_args
+ 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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