; ; jisseflt.asm - floating-point IDCT (SSE & MMX) ; ; 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_sse) PRIVATE EXTN(jconst_idct_float_sse): 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_0_125 times 4 dd 0.125 ; 1/8 PB_CENTERJSAMP times 8 db CENTERJSAMPLE alignz 16 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Perform dequantization and inverse DCT on one block of coefficients. ; ; GLOBAL(void) ; jsimd_idct_float_sse (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_sse) PRIVATE EXTN(jsimd_idct_float_sse): 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 mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] por mm1,mm0 packsswb mm1,mm1 movd eax,mm1 test eax,eax jnz short .columnDCT ; -- AC terms all zero movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] punpckhwd mm1,mm0 ; mm1=(** 02 ** 03) punpcklwd mm0,mm0 ; mm0=(00 00 01 01) psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03) psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) cvtpi2ps xmm3,mm1 ; xmm3=(02 03 ** **) cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) movlhps xmm0,xmm3 ; 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 mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)] movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] punpckhwd mm4,mm0 ; mm4=(** 02 ** 03) punpcklwd mm0,mm0 ; mm0=(00 00 01 01) punpckhwd mm5,mm1 ; mm5=(** 22 ** 23) punpcklwd mm1,mm1 ; mm1=(20 20 21 21) psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03) psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01) cvtpi2ps xmm4,mm4 ; xmm4=(02 03 ** **) cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **) psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23) psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21) cvtpi2ps xmm5,mm5 ; xmm5=(22 23 ** **) cvtpi2ps xmm1,mm1 ; xmm1=(20 21 ** **) punpckhwd mm6,mm2 ; mm6=(** 42 ** 43) punpcklwd mm2,mm2 ; mm2=(40 40 41 41) punpckhwd mm7,mm3 ; mm7=(** 62 ** 63) punpcklwd mm3,mm3 ; mm3=(60 60 61 61) psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43) psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41) cvtpi2ps xmm6,mm6 ; xmm6=(42 43 ** **) cvtpi2ps xmm2,mm2 ; xmm2=(40 41 ** **) psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63) psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61) cvtpi2ps xmm7,mm7 ; xmm7=(62 63 ** **) cvtpi2ps xmm3,mm3 ; xmm3=(60 61 ** **) movlhps xmm0,xmm4 ; xmm0=in0=(00 01 02 03) movlhps xmm1,xmm5 ; xmm1=in2=(20 21 22 23) mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)] movlhps xmm2,xmm6 ; xmm2=in4=(40 41 42 43) movlhps xmm3,xmm7 ; xmm3=in6=(60 61 62 63) 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 mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] punpckhwd mm6,mm4 ; mm6=(** 12 ** 13) punpcklwd mm4,mm4 ; mm4=(10 10 11 11) punpckhwd mm2,mm0 ; mm2=(** 32 ** 33) punpcklwd mm0,mm0 ; mm0=(30 30 31 31) psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13) psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11) cvtpi2ps xmm4,mm6 ; xmm4=(12 13 ** **) cvtpi2ps xmm2,mm4 ; xmm2=(10 11 ** **) psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33) psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31) cvtpi2ps xmm0,mm2 ; xmm0=(32 33 ** **) cvtpi2ps xmm3,mm0 ; xmm3=(30 31 ** **) punpckhwd mm7,mm5 ; mm7=(** 52 ** 53) punpcklwd mm5,mm5 ; mm5=(50 50 51 51) punpckhwd mm3,mm1 ; mm3=(** 72 ** 73) punpcklwd mm1,mm1 ; mm1=(70 70 71 71) movlhps xmm2,xmm4 ; xmm2=in1=(10 11 12 13) movlhps xmm3,xmm0 ; xmm3=in3=(30 31 32 33) psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53) psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51) cvtpi2ps xmm4,mm7 ; xmm4=(52 53 ** **) cvtpi2ps xmm5,mm5 ; xmm5=(50 51 ** **) psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73) psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71) cvtpi2ps xmm0,mm3 ; xmm0=(72 73 ** **) cvtpi2ps xmm1,mm1 ; xmm1=(70 71 ** **) mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)] mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)] movlhps xmm5,xmm4 ; xmm5=in5=(50 51 52 53) movlhps xmm1,xmm0 ; xmm1=in7=(70 71 72 73) 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_0_125)] ; xmm1=[PD_0_125] mulps xmm6,xmm1 ; descale(1/8) mulps xmm7,xmm1 ; descale(1/8) mulps xmm5,xmm1 ; descale(1/8) mulps xmm0,xmm1 ; descale(1/8) movhlps xmm3,xmm6 movhlps xmm1,xmm7 cvtps2pi mm0,xmm6 ; round to int32, mm0=data0L=(00 10) cvtps2pi mm1,xmm7 ; round to int32, mm1=data1L=(01 11) cvtps2pi mm2,xmm3 ; round to int32, mm2=data0H=(20 30) cvtps2pi mm3,xmm1 ; round to int32, mm3=data1H=(21 31) packssdw mm0,mm2 ; mm0=data0=(00 10 20 30) packssdw mm1,mm3 ; mm1=data1=(01 11 21 31) movhlps xmm6,xmm5 movhlps xmm7,xmm0 cvtps2pi mm4,xmm5 ; round to int32, mm4=data7L=(07 17) cvtps2pi mm5,xmm0 ; round to int32, mm5=data6L=(06 16) cvtps2pi mm6,xmm6 ; round to int32, mm6=data7H=(27 37) cvtps2pi mm7,xmm7 ; round to int32, mm7=data6H=(26 36) packssdw mm4,mm6 ; mm4=data7=(07 17 27 37) packssdw mm5,mm7 ; mm5=data6=(06 16 26 36) packsswb mm0,mm5 ; mm0=(00 10 20 30 06 16 26 36) packsswb mm1,mm4 ; mm1=(01 11 21 31 07 17 27 37) movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2 movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3 movaps xmm6,[GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125] addps xmm4,xmm2 ; xmm4=tmp4 movaps xmm5,xmm3 movaps xmm0,xmm1 addps xmm3,xmm2 ; xmm3=data2=(02 12 22 32) addps xmm1,xmm4 ; xmm1=data4=(04 14 24 34) subps xmm5,xmm2 ; xmm5=data5=(05 15 25 35) subps xmm0,xmm4 ; xmm0=data3=(03 13 23 33) mulps xmm3,xmm6 ; descale(1/8) mulps xmm1,xmm6 ; descale(1/8) mulps xmm5,xmm6 ; descale(1/8) mulps xmm0,xmm6 ; descale(1/8) movhlps xmm7,xmm3 movhlps xmm2,xmm1 cvtps2pi mm2,xmm3 ; round to int32, mm2=data2L=(02 12) cvtps2pi mm3,xmm1 ; round to int32, mm3=data4L=(04 14) cvtps2pi mm6,xmm7 ; round to int32, mm6=data2H=(22 32) cvtps2pi mm7,xmm2 ; round to int32, mm7=data4H=(24 34) packssdw mm2,mm6 ; mm2=data2=(02 12 22 32) packssdw mm3,mm7 ; mm3=data4=(04 14 24 34) movhlps xmm4,xmm5 movhlps xmm6,xmm0 cvtps2pi mm5,xmm5 ; round to int32, mm5=data5L=(05 15) cvtps2pi mm4,xmm0 ; round to int32, mm4=data3L=(03 13) cvtps2pi mm6,xmm4 ; round to int32, mm6=data5H=(25 35) cvtps2pi mm7,xmm6 ; round to int32, mm7=data3H=(23 33) packssdw mm5,mm6 ; mm5=data5=(05 15 25 35) packssdw mm4,mm7 ; mm4=data3=(03 13 23 33) movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP] packsswb mm2,mm3 ; mm2=(02 12 22 32 04 14 24 34) packsswb mm4,mm5 ; mm4=(03 13 23 33 05 15 25 35) paddb mm0,mm6 paddb mm1,mm6 paddb mm2,mm6 paddb mm4,mm6 movq mm7,mm0 ; transpose coefficients(phase 1) punpcklbw mm0,mm1 ; mm0=(00 01 10 11 20 21 30 31) punpckhbw mm7,mm1 ; mm7=(06 07 16 17 26 27 36 37) movq mm3,mm2 ; transpose coefficients(phase 1) punpcklbw mm2,mm4 ; mm2=(02 03 12 13 22 23 32 33) punpckhbw mm3,mm4 ; mm3=(04 05 14 15 24 25 34 35) movq mm5,mm0 ; transpose coefficients(phase 2) punpcklwd mm0,mm2 ; mm0=(00 01 02 03 10 11 12 13) punpckhwd mm5,mm2 ; mm5=(20 21 22 23 30 31 32 33) movq mm6,mm3 ; transpose coefficients(phase 2) punpcklwd mm3,mm7 ; mm3=(04 05 06 07 14 15 16 17) punpckhwd mm6,mm7 ; mm6=(24 25 26 27 34 35 36 37) movq mm1,mm0 ; transpose coefficients(phase 3) punpckldq mm0,mm3 ; mm0=(00 01 02 03 04 05 06 07) punpckhdq mm1,mm3 ; mm1=(10 11 12 13 14 15 16 17) movq mm4,mm5 ; transpose coefficients(phase 3) punpckldq mm5,mm6 ; mm5=(20 21 22 23 24 25 26 27) punpckhdq mm4,mm6 ; mm4=(30 31 32 33 34 35 36 37) pushpic ebx ; save GOT address mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW] movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4 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 emms ; empty MMX state 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