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mozjpeg/simd/i386/jdmrgext-sse2.asm
DRC 3a32d199df x86 SIMD: Consistify capitalization of NASM types 
byte, word, dword, qword, oword, and yword are all assembler keywords,
so it makes sense to use lowercase for these so as not to mistake them
for macros or constants.
2019-10-17 20:02:20 -05:00

518 lines
21 KiB
NASM
Raw Blame History

;
; 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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