; ; jiss2flt.asm - floating-point IDCT (SSE & SSE2) ; ; Copyright 2009 Pierre Ossman 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