| ; |
| ; jidctflt.asm - floating-point IDCT (SSE & SSE2) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; |
| ; 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 |
| ; |
| ; 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) PRIVATE |
| |
| 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) PRIVATE |
| |
| 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 |
