| ; |
| ; jidctflt.asm - floating-point IDCT (3DNow! & 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" |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| alignz 16 |
| global EXTN(jconst_idct_float_3dnow) |
| |
| EXTN(jconst_idct_float_3dnow): |
| |
| PD_1_414 times 2 dd 1.414213562373095048801689 |
| PD_1_847 times 2 dd 1.847759065022573512256366 |
| PD_1_082 times 2 dd 1.082392200292393968799446 |
| PD_2_613 times 2 dd 2.613125929752753055713286 |
| PD_RNDINT_MAGIC times 2 dd 100663296.0 ; (float)(0x00C00000 << 3) |
| 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_3dnow (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_MMWORD ; mmword 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_3dnow) |
| |
| EXTN(jsimd_idct_float_3dnow): |
| push ebp |
| mov eax,esp ; eax = original ebp |
| sub esp, byte 4 |
| and esp, byte (-SIZEOF_MMWORD) ; align to 64 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/2 ; ctr |
| alignx 16,7 |
| .columnloop: |
| %ifndef NO_ZERO_COLUMN_TEST_FLOAT_3DNOW |
| mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| jnz short .columnDCT |
| |
| pushpic ebx ; save GOT address |
| mov ebx, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| mov eax, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)] |
| or ebx, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| or eax, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| or ebx, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| or eax,ebx |
| poppic ebx ; restore GOT address |
| jnz short .columnDCT |
| |
| ; -- AC terms all zero |
| |
| movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| |
| punpcklwd mm0,mm0 |
| psrad mm0,(DWORD_BIT-WORD_BIT) |
| pi2fd mm0,mm0 |
| |
| pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| |
| movq mm1,mm0 |
| punpckldq mm0,mm0 |
| punpckhdq mm1,mm1 |
| |
| movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1 |
| movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm1 |
| movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm1 |
| movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1 |
| jmp near .nextcolumn |
| alignx 16,7 |
| %endif |
| .columnDCT: |
| |
| ; -- Even part |
| |
| movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movd mm1, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| movd mm2, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)] |
| movd mm3, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| |
| punpcklwd mm0,mm0 |
| punpcklwd mm1,mm1 |
| psrad mm0,(DWORD_BIT-WORD_BIT) |
| psrad mm1,(DWORD_BIT-WORD_BIT) |
| pi2fd mm0,mm0 |
| pi2fd mm1,mm1 |
| |
| pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| pfmul mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| |
| punpcklwd mm2,mm2 |
| punpcklwd mm3,mm3 |
| psrad mm2,(DWORD_BIT-WORD_BIT) |
| psrad mm3,(DWORD_BIT-WORD_BIT) |
| pi2fd mm2,mm2 |
| pi2fd mm3,mm3 |
| |
| pfmul mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| pfmul mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| |
| movq mm4,mm0 |
| movq mm5,mm1 |
| pfsub mm0,mm2 ; mm0=tmp11 |
| pfsub mm1,mm3 |
| pfadd mm4,mm2 ; mm4=tmp10 |
| pfadd mm5,mm3 ; mm5=tmp13 |
| |
| pfmul mm1,[GOTOFF(ebx,PD_1_414)] |
| pfsub mm1,mm5 ; mm1=tmp12 |
| |
| movq mm6,mm4 |
| movq mm7,mm0 |
| pfsub mm4,mm5 ; mm4=tmp3 |
| pfsub mm0,mm1 ; mm0=tmp2 |
| pfadd mm6,mm5 ; mm6=tmp0 |
| pfadd mm7,mm1 ; mm7=tmp1 |
| |
| movq MMWORD [wk(1)], mm4 ; tmp3 |
| movq MMWORD [wk(0)], mm0 ; tmp2 |
| |
| ; -- Odd part |
| |
| movd mm2, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movd mm3, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| movd mm5, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movd mm1, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| |
| punpcklwd mm2,mm2 |
| punpcklwd mm3,mm3 |
| psrad mm2,(DWORD_BIT-WORD_BIT) |
| psrad mm3,(DWORD_BIT-WORD_BIT) |
| pi2fd mm2,mm2 |
| pi2fd mm3,mm3 |
| |
| pfmul mm2, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| pfmul mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| |
| punpcklwd mm5,mm5 |
| punpcklwd mm1,mm1 |
| psrad mm5,(DWORD_BIT-WORD_BIT) |
| psrad mm1,(DWORD_BIT-WORD_BIT) |
| pi2fd mm5,mm5 |
| pi2fd mm1,mm1 |
| |
| pfmul mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| pfmul mm1, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)] |
| |
| movq mm4,mm2 |
| movq mm0,mm5 |
| pfadd mm2,mm1 ; mm2=z11 |
| pfadd mm5,mm3 ; mm5=z13 |
| pfsub mm4,mm1 ; mm4=z12 |
| pfsub mm0,mm3 ; mm0=z10 |
| |
| movq mm1,mm2 |
| pfsub mm2,mm5 |
| pfadd mm1,mm5 ; mm1=tmp7 |
| |
| pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11 |
| |
| movq mm3,mm0 |
| pfadd mm0,mm4 |
| pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5 |
| pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930) |
| pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200) |
| pfsubr mm3,mm0 ; mm3=tmp12 |
| pfsub mm4,mm0 ; mm4=tmp10 |
| |
| ; -- Final output stage |
| |
| pfsub mm3,mm1 ; mm3=tmp6 |
| movq mm5,mm6 |
| movq mm0,mm7 |
| pfadd mm6,mm1 ; mm6=data0=(00 01) |
| pfadd mm7,mm3 ; mm7=data1=(10 11) |
| pfsub mm5,mm1 ; mm5=data7=(70 71) |
| pfsub mm0,mm3 ; mm0=data6=(60 61) |
| pfsub mm2,mm3 ; mm2=tmp5 |
| |
| movq mm1,mm6 ; transpose coefficients |
| punpckldq mm6,mm7 ; mm6=(00 10) |
| punpckhdq mm1,mm7 ; mm1=(01 11) |
| movq mm3,mm0 ; transpose coefficients |
| punpckldq mm0,mm5 ; mm0=(60 70) |
| punpckhdq mm3,mm5 ; mm3=(61 71) |
| |
| movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm6 |
| movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1 |
| movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm3 |
| |
| movq mm7, MMWORD [wk(0)] ; mm7=tmp2 |
| movq mm5, MMWORD [wk(1)] ; mm5=tmp3 |
| |
| pfadd mm4,mm2 ; mm4=tmp4 |
| movq mm6,mm7 |
| movq mm1,mm5 |
| pfadd mm7,mm2 ; mm7=data2=(20 21) |
| pfadd mm5,mm4 ; mm5=data4=(40 41) |
| pfsub mm6,mm2 ; mm6=data5=(50 51) |
| pfsub mm1,mm4 ; mm1=data3=(30 31) |
| |
| movq mm0,mm7 ; transpose coefficients |
| punpckldq mm7,mm1 ; mm7=(20 30) |
| punpckhdq mm0,mm1 ; mm0=(21 31) |
| movq mm3,mm5 ; transpose coefficients |
| punpckldq mm5,mm6 ; mm5=(40 50) |
| punpckhdq mm3,mm6 ; mm3=(41 51) |
| |
| movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm7 |
| movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm0 |
| movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5 |
| movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm3 |
| |
| .nextcolumn: |
| add esi, byte 2*SIZEOF_JCOEF ; coef_block |
| add edx, byte 2*SIZEOF_FLOAT_MULT_TYPE ; quantptr |
| add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr |
| dec ecx ; ctr |
| jnz near .columnloop |
| |
| ; -- Prefetch the next coefficient block |
| |
| prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32] |
| prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32] |
| prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32] |
| prefetch [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/2 ; ctr |
| alignx 16,7 |
| .rowloop: |
| |
| ; -- Even part |
| |
| movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)] |
| |
| movq mm4,mm0 |
| movq mm5,mm1 |
| pfsub mm0,mm2 ; mm0=tmp11 |
| pfsub mm1,mm3 |
| pfadd mm4,mm2 ; mm4=tmp10 |
| pfadd mm5,mm3 ; mm5=tmp13 |
| |
| pfmul mm1,[GOTOFF(ebx,PD_1_414)] |
| pfsub mm1,mm5 ; mm1=tmp12 |
| |
| movq mm6,mm4 |
| movq mm7,mm0 |
| pfsub mm4,mm5 ; mm4=tmp3 |
| pfsub mm0,mm1 ; mm0=tmp2 |
| pfadd mm6,mm5 ; mm6=tmp0 |
| pfadd mm7,mm1 ; mm7=tmp1 |
| |
| movq MMWORD [wk(1)], mm4 ; tmp3 |
| movq MMWORD [wk(0)], mm0 ; tmp2 |
| |
| ; -- Odd part |
| |
| movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm3, MMWORD [MMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)] |
| movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)] |
| |
| movq mm4,mm2 |
| movq mm0,mm5 |
| pfadd mm2,mm1 ; mm2=z11 |
| pfadd mm5,mm3 ; mm5=z13 |
| pfsub mm4,mm1 ; mm4=z12 |
| pfsub mm0,mm3 ; mm0=z10 |
| |
| movq mm1,mm2 |
| pfsub mm2,mm5 |
| pfadd mm1,mm5 ; mm1=tmp7 |
| |
| pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11 |
| |
| movq mm3,mm0 |
| pfadd mm0,mm4 |
| pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5 |
| pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930) |
| pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200) |
| pfsubr mm3,mm0 ; mm3=tmp12 |
| pfsub mm4,mm0 ; mm4=tmp10 |
| |
| ; -- Final output stage |
| |
| pfsub mm3,mm1 ; mm3=tmp6 |
| movq mm5,mm6 |
| movq mm0,mm7 |
| pfadd mm6,mm1 ; mm6=data0=(00 10) |
| pfadd mm7,mm3 ; mm7=data1=(01 11) |
| pfsub mm5,mm1 ; mm5=data7=(07 17) |
| pfsub mm0,mm3 ; mm0=data6=(06 16) |
| pfsub mm2,mm3 ; mm2=tmp5 |
| |
| movq mm1,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm1=[PD_RNDINT_MAGIC] |
| pcmpeqd mm3,mm3 |
| psrld mm3,WORD_BIT ; mm3={0xFFFF 0x0000 0xFFFF 0x0000} |
| |
| pfadd mm6,mm1 ; mm6=roundint(data0/8)=(00 ** 10 **) |
| pfadd mm7,mm1 ; mm7=roundint(data1/8)=(01 ** 11 **) |
| pfadd mm0,mm1 ; mm0=roundint(data6/8)=(06 ** 16 **) |
| pfadd mm5,mm1 ; mm5=roundint(data7/8)=(07 ** 17 **) |
| |
| pand mm6,mm3 ; mm6=(00 -- 10 --) |
| pslld mm7,WORD_BIT ; mm7=(-- 01 -- 11) |
| pand mm0,mm3 ; mm0=(06 -- 16 --) |
| pslld mm5,WORD_BIT ; mm5=(-- 07 -- 17) |
| por mm6,mm7 ; mm6=(00 01 10 11) |
| por mm0,mm5 ; mm0=(06 07 16 17) |
| |
| movq mm1, MMWORD [wk(0)] ; mm1=tmp2 |
| movq mm3, MMWORD [wk(1)] ; mm3=tmp3 |
| |
| pfadd mm4,mm2 ; mm4=tmp4 |
| movq mm7,mm1 |
| movq mm5,mm3 |
| pfadd mm1,mm2 ; mm1=data2=(02 12) |
| pfadd mm3,mm4 ; mm3=data4=(04 14) |
| pfsub mm7,mm2 ; mm7=data5=(05 15) |
| pfsub mm5,mm4 ; mm5=data3=(03 13) |
| |
| movq mm2,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm2=[PD_RNDINT_MAGIC] |
| pcmpeqd mm4,mm4 |
| psrld mm4,WORD_BIT ; mm4={0xFFFF 0x0000 0xFFFF 0x0000} |
| |
| pfadd mm3,mm2 ; mm3=roundint(data4/8)=(04 ** 14 **) |
| pfadd mm7,mm2 ; mm7=roundint(data5/8)=(05 ** 15 **) |
| pfadd mm1,mm2 ; mm1=roundint(data2/8)=(02 ** 12 **) |
| pfadd mm5,mm2 ; mm5=roundint(data3/8)=(03 ** 13 **) |
| |
| pand mm3,mm4 ; mm3=(04 -- 14 --) |
| pslld mm7,WORD_BIT ; mm7=(-- 05 -- 15) |
| pand mm1,mm4 ; mm1=(02 -- 12 --) |
| pslld mm5,WORD_BIT ; mm5=(-- 03 -- 13) |
| por mm3,mm7 ; mm3=(04 05 14 15) |
| por mm1,mm5 ; mm1=(02 03 12 13) |
| |
| movq mm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm2=[PB_CENTERJSAMP] |
| |
| packsswb mm6,mm3 ; mm6=(00 01 10 11 04 05 14 15) |
| packsswb mm1,mm0 ; mm1=(02 03 12 13 06 07 16 17) |
| paddb mm6,mm2 |
| paddb mm1,mm2 |
| |
| movq mm4,mm6 ; transpose coefficients(phase 2) |
| punpcklwd mm6,mm1 ; mm6=(00 01 02 03 10 11 12 13) |
| punpckhwd mm4,mm1 ; mm4=(04 05 06 07 14 15 16 17) |
| |
| movq mm7,mm6 ; transpose coefficients(phase 3) |
| punpckldq mm6,mm4 ; mm6=(00 01 02 03 04 05 06 07) |
| punpckhdq mm7,mm4 ; mm7=(10 11 12 13 14 15 16 17) |
| |
| 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], mm6 |
| movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm7 |
| |
| poppic ebx ; restore GOT address |
| |
| add esi, byte 2*SIZEOF_FAST_FLOAT ; wsptr |
| add edi, byte 2*SIZEOF_JSAMPROW |
| dec ecx ; ctr |
| jnz near .rowloop |
| |
| femms ; empty MMX/3DNow! 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 |
