kc3-lang/libjpeg-turbo/simd/jiss2flt.asm
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Hash : b7753510
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Date : 2014-05-11T09:36:25
Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons. They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code. In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.) git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1285 632fc199-4ca6-4c93-a231-07263d6284db
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simd/jiss2flt.asm
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; ; jiss2flt.asm - floating-point IDCT (SSE & SSE2) ; ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB ; ; 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 ; ; This file contains a floating-point implementation of the inverse DCT ; (Discrete Cosine Transform). The following code is based directly on ; the IJG's original jidctflt.c; see the jidctflt.c for more details. ; ; [TAB8] %include "jsimdext.inc" %include "jdct.inc" ; -------------------------------------------------------------------------- %macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5) shufps %1,%2,0x44 %endmacro %macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7) shufps %1,%2,0xEE %endmacro ; -------------------------------------------------------------------------- SECTION SEG_CONST alignz 16 global EXTN(jconst_idct_float_sse2) EXTN(jconst_idct_float_sse2): PD_1_414 times 4 dd 1.414213562373095048801689 PD_1_847 times 4 dd 1.847759065022573512256366 PD_1_082 times 4 dd 1.082392200292393968799446 PD_M2_613 times 4 dd -2.613125929752753055713286 PD_RNDINT_MAGIC times 4 dd 100663296.0 ; (float)(0x00C00000 << 3) PB_CENTERJSAMP times 16 db CENTERJSAMPLE alignz 16 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Perform dequantization and inverse DCT on one block of coefficients. ; ; GLOBAL(void) ; jsimd_idct_float_sse2 (void * dct_table, JCOEFPTR coef_block, ; JSAMPARRAY output_buf, JDIMENSION output_col) ; %define dct_table(b) (b)+8 ; void * dct_table %define coef_block(b) (b)+12 ; JCOEFPTR coef_block %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf %define output_col(b) (b)+20 ; JDIMENSION output_col %define original_ebp ebp+0 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] %define WK_NUM 2 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT ; FAST_FLOAT workspace[DCTSIZE2] align 16 global EXTN(jsimd_idct_float_sse2) EXTN(jsimd_idct_float_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, [workspace] push ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved push esi push edi get_GOT ebx ; get GOT address ; ---- Pass 1: process columns from input, store into work array. ; mov eax, [original_ebp] mov edx, POINTER [dct_table(eax)] ; quantptr mov esi, JCOEFPTR [coef_block(eax)] ; inptr lea edi, [workspace] ; FAST_FLOAT * wsptr mov ecx, DCTSIZE/4 ; ctr alignx 16,7 .columnloop: %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] jnz near .columnDCT movq xmm1, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] movq xmm2, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] movq xmm4, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] movq xmm6, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] movq xmm7, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] por xmm1,xmm2 por xmm3,xmm4 por xmm5,xmm6 por xmm1,xmm3 por xmm5,xmm7 por xmm1,xmm5 packsswb xmm1,xmm1 movd eax,xmm1 test eax,eax jnz short .columnDCT ; -- AC terms all zero movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03) cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03) mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] movaps xmm1,xmm0 movaps xmm2,xmm0 movaps xmm3,xmm0 shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00) shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01) shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02) shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03) movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 jmp near .nextcolumn alignx 16,7 %endif .columnDCT: ; -- Even part movq xmm0, XMM_MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] movq xmm1, XMM_MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] movq xmm2, XMM_MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03) punpcklwd xmm1,xmm1 ; xmm1=(20 20 21 21 22 22 23 23) psrad xmm0,(DWORD_BIT-WORD_BIT) ; xmm0=in0=(00 01 02 03) psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in2=(20 21 22 23) cvtdq2ps xmm0,xmm0 ; xmm0=in0=(00 01 02 03) cvtdq2ps xmm1,xmm1 ; xmm1=in2=(20 21 22 23) punpcklwd xmm2,xmm2 ; xmm2=(40 40 41 41 42 42 43 43) punpcklwd xmm3,xmm3 ; xmm3=(60 60 61 61 62 62 63 63) psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in4=(40 41 42 43) psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in6=(60 61 62 63) cvtdq2ps xmm2,xmm2 ; xmm2=in4=(40 41 42 43) cvtdq2ps xmm3,xmm3 ; xmm3=in6=(60 61 62 63) mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)] movaps xmm4,xmm0 movaps xmm5,xmm1 subps xmm0,xmm2 ; xmm0=tmp11 subps xmm1,xmm3 addps xmm4,xmm2 ; xmm4=tmp10 addps xmm5,xmm3 ; xmm5=tmp13 mulps xmm1,[GOTOFF(ebx,PD_1_414)] subps xmm1,xmm5 ; xmm1=tmp12 movaps xmm6,xmm4 movaps xmm7,xmm0 subps xmm4,xmm5 ; xmm4=tmp3 subps xmm0,xmm1 ; xmm0=tmp2 addps xmm6,xmm5 ; xmm6=tmp0 addps xmm7,xmm1 ; xmm7=tmp1 movaps XMMWORD [wk(1)], xmm4 ; tmp3 movaps XMMWORD [wk(0)], xmm0 ; tmp2 ; -- Odd part movq xmm2, XMM_MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] movq xmm5, XMM_MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] movq xmm1, XMM_MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] punpcklwd xmm2,xmm2 ; xmm2=(10 10 11 11 12 12 13 13) punpcklwd xmm3,xmm3 ; xmm3=(30 30 31 31 32 32 33 33) psrad xmm2,(DWORD_BIT-WORD_BIT) ; xmm2=in1=(10 11 12 13) psrad xmm3,(DWORD_BIT-WORD_BIT) ; xmm3=in3=(30 31 32 33) cvtdq2ps xmm2,xmm2 ; xmm2=in1=(10 11 12 13) cvtdq2ps xmm3,xmm3 ; xmm3=in3=(30 31 32 33) punpcklwd xmm5,xmm5 ; xmm5=(50 50 51 51 52 52 53 53) punpcklwd xmm1,xmm1 ; xmm1=(70 70 71 71 72 72 73 73) psrad xmm5,(DWORD_BIT-WORD_BIT) ; xmm5=in5=(50 51 52 53) psrad xmm1,(DWORD_BIT-WORD_BIT) ; xmm1=in7=(70 71 72 73) cvtdq2ps xmm5,xmm5 ; xmm5=in5=(50 51 52 53) cvtdq2ps xmm1,xmm1 ; xmm1=in7=(70 71 72 73) mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)] movaps xmm4,xmm2 movaps xmm0,xmm5 addps xmm2,xmm1 ; xmm2=z11 addps xmm5,xmm3 ; xmm5=z13 subps xmm4,xmm1 ; xmm4=z12 subps xmm0,xmm3 ; xmm0=z10 movaps xmm1,xmm2 subps xmm2,xmm5 addps xmm1,xmm5 ; xmm1=tmp7 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 movaps xmm3,xmm0 addps xmm0,xmm4 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) addps xmm3,xmm0 ; xmm3=tmp12 subps xmm4,xmm0 ; xmm4=tmp10 ; -- Final output stage subps xmm3,xmm1 ; xmm3=tmp6 movaps xmm5,xmm6 movaps xmm0,xmm7 addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03) addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13) subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73) subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63) subps xmm2,xmm3 ; xmm2=tmp5 movaps xmm1,xmm6 ; transpose coefficients(phase 1) unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11) unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13) movaps xmm3,xmm0 ; transpose coefficients(phase 1) unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71) unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73) movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71) movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73) addps xmm4,xmm2 ; xmm4=tmp4 movaps xmm0,xmm7 movaps xmm3,xmm5 addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23) addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43) subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53) subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33) movaps xmm2,xmm7 ; transpose coefficients(phase 1) unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31) unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33) movaps xmm4,xmm5 ; transpose coefficients(phase 1) unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51) unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53) movaps xmm3,xmm6 ; transpose coefficients(phase 2) unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30) unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31) movaps xmm0,xmm1 ; transpose coefficients(phase 2) unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32) unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33) movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71) movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73) movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0 movaps xmm6,xmm5 ; transpose coefficients(phase 2) unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70) unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71) movaps xmm3,xmm4 ; transpose coefficients(phase 2) unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72) unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73) movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3 .nextcolumn: add esi, byte 4*SIZEOF_JCOEF ; coef_block add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr dec ecx ; ctr jnz near .columnloop ; -- Prefetch the next coefficient block prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32] prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32] prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32] prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32] ; ---- Pass 2: process rows from work array, store into output array. mov eax, [original_ebp] lea esi, [workspace] ; FAST_FLOAT * wsptr mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) mov eax, JDIMENSION [output_col(eax)] mov ecx, DCTSIZE/4 ; ctr alignx 16,7 .rowloop: ; -- Even part movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm4,xmm0 movaps xmm5,xmm1 subps xmm0,xmm2 ; xmm0=tmp11 subps xmm1,xmm3 addps xmm4,xmm2 ; xmm4=tmp10 addps xmm5,xmm3 ; xmm5=tmp13 mulps xmm1,[GOTOFF(ebx,PD_1_414)] subps xmm1,xmm5 ; xmm1=tmp12 movaps xmm6,xmm4 movaps xmm7,xmm0 subps xmm4,xmm5 ; xmm4=tmp3 subps xmm0,xmm1 ; xmm0=tmp2 addps xmm6,xmm5 ; xmm6=tmp0 addps xmm7,xmm1 ; xmm7=tmp1 movaps XMMWORD [wk(1)], xmm4 ; tmp3 movaps XMMWORD [wk(0)], xmm0 ; tmp2 ; -- Odd part movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)] movaps xmm4,xmm2 movaps xmm0,xmm5 addps xmm2,xmm1 ; xmm2=z11 addps xmm5,xmm3 ; xmm5=z13 subps xmm4,xmm1 ; xmm4=z12 subps xmm0,xmm3 ; xmm0=z10 movaps xmm1,xmm2 subps xmm2,xmm5 addps xmm1,xmm5 ; xmm1=tmp7 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11 movaps xmm3,xmm0 addps xmm0,xmm4 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930) mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200) addps xmm3,xmm0 ; xmm3=tmp12 subps xmm4,xmm0 ; xmm4=tmp10 ; -- Final output stage subps xmm3,xmm1 ; xmm3=tmp6 movaps xmm5,xmm6 movaps xmm0,xmm7 addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30) addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31) subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37) subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36) subps xmm2,xmm3 ; xmm2=tmp5 movaps xmm1,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm1=[PD_RNDINT_MAGIC] pcmpeqd xmm3,xmm3 psrld xmm3,WORD_BIT ; xmm3={0xFFFF 0x0000 0xFFFF 0x0000 ..} addps xmm6,xmm1 ; xmm6=roundint(data0/8)=(00 ** 10 ** 20 ** 30 **) addps xmm7,xmm1 ; xmm7=roundint(data1/8)=(01 ** 11 ** 21 ** 31 **) addps xmm0,xmm1 ; xmm0=roundint(data6/8)=(06 ** 16 ** 26 ** 36 **) addps xmm5,xmm1 ; xmm5=roundint(data7/8)=(07 ** 17 ** 27 ** 37 **) pand xmm6,xmm3 ; xmm6=(00 -- 10 -- 20 -- 30 --) pslld xmm7,WORD_BIT ; xmm7=(-- 01 -- 11 -- 21 -- 31) pand xmm0,xmm3 ; xmm0=(06 -- 16 -- 26 -- 36 --) pslld xmm5,WORD_BIT ; xmm5=(-- 07 -- 17 -- 27 -- 37) por xmm6,xmm7 ; xmm6=(00 01 10 11 20 21 30 31) por xmm0,xmm5 ; xmm0=(06 07 16 17 26 27 36 37) movaps xmm1, XMMWORD [wk(0)] ; xmm1=tmp2 movaps xmm3, XMMWORD [wk(1)] ; xmm3=tmp3 addps xmm4,xmm2 ; xmm4=tmp4 movaps xmm7,xmm1 movaps xmm5,xmm3 addps xmm1,xmm2 ; xmm1=data2=(02 12 22 32) addps xmm3,xmm4 ; xmm3=data4=(04 14 24 34) subps xmm7,xmm2 ; xmm7=data5=(05 15 25 35) subps xmm5,xmm4 ; xmm5=data3=(03 13 23 33) movaps xmm2,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; xmm2=[PD_RNDINT_MAGIC] pcmpeqd xmm4,xmm4 psrld xmm4,WORD_BIT ; xmm4={0xFFFF 0x0000 0xFFFF 0x0000 ..} addps xmm3,xmm2 ; xmm3=roundint(data4/8)=(04 ** 14 ** 24 ** 34 **) addps xmm7,xmm2 ; xmm7=roundint(data5/8)=(05 ** 15 ** 25 ** 35 **) addps xmm1,xmm2 ; xmm1=roundint(data2/8)=(02 ** 12 ** 22 ** 32 **) addps xmm5,xmm2 ; xmm5=roundint(data3/8)=(03 ** 13 ** 23 ** 33 **) pand xmm3,xmm4 ; xmm3=(04 -- 14 -- 24 -- 34 --) pslld xmm7,WORD_BIT ; xmm7=(-- 05 -- 15 -- 25 -- 35) pand xmm1,xmm4 ; xmm1=(02 -- 12 -- 22 -- 32 --) pslld xmm5,WORD_BIT ; xmm5=(-- 03 -- 13 -- 23 -- 33) por xmm3,xmm7 ; xmm3=(04 05 14 15 24 25 34 35) por xmm1,xmm5 ; xmm1=(02 03 12 13 22 23 32 33) movdqa xmm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP] packsswb xmm6,xmm3 ; xmm6=(00 01 10 11 20 21 30 31 04 05 14 15 24 25 34 35) packsswb xmm1,xmm0 ; xmm1=(02 03 12 13 22 23 32 33 06 07 16 17 26 27 36 37) paddb xmm6,xmm2 paddb xmm1,xmm2 movdqa xmm4,xmm6 ; transpose coefficients(phase 2) punpcklwd xmm6,xmm1 ; xmm6=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33) punpckhwd xmm4,xmm1 ; xmm4=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37) movdqa xmm7,xmm6 ; transpose coefficients(phase 3) punpckldq xmm6,xmm4 ; xmm6=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17) punpckhdq xmm7,xmm4 ; xmm7=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37) pshufd xmm5,xmm6,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07) pshufd xmm3,xmm7,0x4E ; xmm3=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27) pushpic ebx ; save GOT address mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm7 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5 movq XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE], xmm3 poppic ebx ; restore GOT address add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr add edi, byte 4*SIZEOF_JSAMPROW dec ecx ; ctr jnz near .rowloop 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 ; For some reason, the OS X linker does not honor the request to align the ; segment unless we do this. align 16