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Hash :
5e27ca23
Author :
Date :
2025-09-19T14:21:49
x86: Reformat NASM code to improve readability (and simplify the checkstyle script)
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;
; Merged upsampling/color conversion (32-bit SSE2)
;
; Copyright 2009, 2012 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2012, 2016, 2024-2025, 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) or Yasm.
%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 ; ---------------
; NOTE: The values of RGB_RED, RGB_GREEN, and RGB_BLUE determine the
; mapping of components A, B, and C to red, green, and blue.
;
; xmmA = (A0 A2 A4 A6 A8 Aa Ac Ae) = AE
; xmmB = (A1 A3 A5 A7 A9 Ab Ad Af) = AO
; xmmC = (B0 B2 B4 B6 B8 Ba Bc Be) = BE
; xmmD = (B1 B3 B5 B7 B9 Bb Bd Bf) = BO
; xmmE = (C0 C2 C4 C6 C8 Ca Cc Ce) = CE
; xmmF = (C1 C3 C5 C7 C9 Cb Cd Cf) = CO
; xmmG = (** ** ** ** ** ** ** **)
; xmmH = (** ** ** ** ** ** ** **)
punpcklbw xmmA, xmmC
; xmmA = (A0 B0 A2 B2 A4 B4 A6 B6 A8 B8 Aa Ba Ac Bc Ae Be)
punpcklbw xmmE, xmmB
; xmmE = (C0 A1 C2 A3 C4 A5 C6 A7 C8 A9 Ca Ab Cc Ad Ce Af)
punpcklbw xmmD, xmmF
; xmmD = (B1 C1 B3 C3 B5 C5 B7 C7 B9 C9 Bb Cb Bd Cd Bf Cf)
movdqa xmmG, xmmA
movdqa xmmH, xmmA
punpcklwd xmmA, xmmE
; xmmA = (A0 B0 C0 A1 A2 B2 C2 A3 A4 B4 C4 A5 A6 B6 C6 A7)
punpckhwd xmmG, xmmE
; xmmG = (A8 B8 C8 A9 Aa Ba Ca Ab Ac Bc Cc Ad Ae Be Ce Af)
psrldq xmmH, 2
; xmmH = (A2 B2 A4 B4 A6 B6 A8 B8 Aa Ba Ac Bc Ae Be -- --)
psrldq xmmE, 2
; xmmE = (C2 A3 C4 A5 C6 A7 C8 A9 Ca Ab Cc Ad Ce Af -- --)
movdqa xmmC, xmmD
movdqa xmmB, xmmD
punpcklwd xmmD, xmmH
; xmmD = (B1 C1 A2 B2 B3 C3 A4 B4 B5 C5 A6 B6 B7 C7 A8 B8)
punpckhwd xmmC, xmmH
; xmmC = (B9 C9 Aa Ba Bb Cb Ac Bc Bd Cd Ae Be Bf Cf -- --)
psrldq xmmB, 2
; xmmB = (B3 C3 B5 C5 B7 C7 B9 C9 Bb Cb Bd Cd Bf Cf -- --)
movdqa xmmF, xmmE
punpcklwd xmmE, xmmB
; xmmE = (C2 A3 B3 C3 C4 A5 B5 C5 C6 A7 B7 C7 C8 A9 B9 C9)
punpckhwd xmmF, xmmB
; xmmF = (Ca Ab Bb Cb Cc Ad Bd Cd Ce Af Bf Cf -- -- -- --)
pshufd xmmH, xmmA, 0x4E
; xmmH = (A4 B4 C4 A5 A6 B6 C6 A7 A0 B0 C0 A1 A2 B2 C2 A3)
movdqa xmmB, xmmE
punpckldq xmmA, xmmD
; xmmA = (A0 B0 C0 A1 B1 C1 A2 B2 A2 B2 C2 A3 B3 C3 A4 B4)
punpckldq xmmE, xmmH
; xmmE = (C2 A3 B3 C3 A4 B4 C4 A5 C4 A5 B5 C5 A6 B6 C6 A7)
punpckhdq xmmD, xmmB
; xmmD = (B5 C5 A6 B6 C6 A7 B7 C7 B7 C7 A8 B8 C8 A9 B9 C9)
pshufd xmmH, xmmG, 0x4E
; xmmH = (Ac Bc Cc Ad Ae Be Ce Af A8 B8 C8 A9 Aa Ba Ca Ab)
movdqa xmmB, xmmF
punpckldq xmmG, xmmC
; xmmG = (A8 B8 C8 A9 B9 C9 Aa Ba Aa Ba Ca Ab Bb Cb Ac Bc)
punpckldq xmmF, xmmH
; xmmF = (Ca Ab Bb Cb Ac Bc Cc Ad Cc Ad Bd Cd Ae Be Ce Af)
punpckhdq xmmC, xmmB
; xmmC = (Bd Cd Ae Be Ce Af Bf Cf Bf Cf -- -- -- -- -- --)
punpcklqdq xmmA, xmmE
; xmmA = (A0 B0 C0 A1 B1 C1 A2 B2 C2 A3 B3 C3 A4 B4 C4 A5)
punpcklqdq xmmD, xmmG
; xmmD = (B5 C5 A6 B6 C6 A7 B7 C7 A8 B8 C8 A9 B9 C9 Aa Ba)
punpcklqdq xmmF, xmmC
; xmmF = (Ca Ab Bb Cb Ac Bc Cc Ad Bd Cd Ae Be Ce Af Bf Cf)
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
; NOTE: The values of RGB_RED, RGB_GREEN, and RGB_BLUE determine the
; mapping of components A, B, C, and D to red, green, and blue.
;
; xmmA = (A0 A2 A4 A6 A8 Aa Ac Ae) = AE
; xmmB = (A1 A3 A5 A7 A9 Ab Ad Af) = AO
; xmmC = (B0 B2 B4 B6 B8 Ba Bc Be) = BE
; xmmD = (B1 B3 B5 B7 B9 Bb Bd Bf) = BO
; xmmE = (C0 C2 C4 C6 C8 Ca Cc Ce) = CE
; xmmF = (C1 C3 C5 C7 C9 Cb Cd Cf) = CO
; xmmG = (D0 D2 D4 D6 D8 Da Dc De) = DE
; xmmH = (D1 D3 D5 D7 D9 Db Dd Df) = DO
punpcklbw xmmA, xmmC
; xmmA = (A0 B0 A2 B2 A4 B4 A6 B6 A8 B8 Aa Ba Ac Bc Ae Be)
punpcklbw xmmE, xmmG
; xmmE = (C0 D0 C2 D2 C4 D4 C6 D6 C8 D8 Ca Da Cc Dc Ce De)
punpcklbw xmmB, xmmD
; xmmB = (A1 B1 A3 B3 A5 B5 A7 B7 A9 B9 Ab Bb Ad Bd Af Bf)
punpcklbw xmmF, xmmH
; xmmF = (C1 D1 C3 D3 C5 D5 C7 D7 C9 D9 Cb Db Cd Dd Cf Df)
movdqa xmmC, xmmA
punpcklwd xmmA, xmmE
; xmmA = (A0 B0 C0 D0 A2 B2 C2 D2 A4 B4 C4 D4 A6 B6 C6 D6)
punpckhwd xmmC, xmmE
; xmmC = (A8 B8 C8 D8 Aa Ba Ca Da Ac Bc Cc Dc Ae Be Ce De)
movdqa xmmG, xmmB
punpcklwd xmmB, xmmF
; xmmB = (A1 B1 C1 D1 A3 B3 C3 D3 A5 B5 C5 D5 A7 B7 C7 D7)
punpckhwd xmmG, xmmF
; xmmG = (A9 B9 C9 D9 Ab Bb Cb Db Ad Bd Cd Dd Af Bf Cf Df)
movdqa xmmD, xmmA
punpckldq xmmA, xmmB
; xmmA = (A0 B0 C0 D0 A1 B1 C1 D1 A2 B2 C2 D2 A3 B3 C3 D3)
punpckhdq xmmD, xmmB
; xmmD = (A4 B4 C4 D4 A5 B5 C5 D5 A6 B6 C6 D6 A7 B7 C7 D7)
movdqa xmmH, xmmC
punpckldq xmmC, xmmG
; xmmC = (A8 B8 C8 D8 A9 B9 C9 D9 Aa Ba Ca Da Ab Bb Cb Db)
punpckhdq xmmH, xmmG
; xmmH = (Ac Bc Cc Dc Ad Bd Cd Dd Ae Be Ce De Af Bf Cf Df)
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