| ; |
| ; jfdctint.asm - accurate integer FDCT (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 slow-but-accurate integer implementation of the |
| ; forward DCT (Discrete Cosine Transform). The following code is based |
| ; directly on the IJG's original jfdctint.c; see the jfdctint.c for |
| ; more details. |
| ; |
| ; [TAB8] |
| |
| %include "jsimdext.inc" |
| %include "jdct.inc" |
| |
| ; -------------------------------------------------------------------------- |
| |
| %define CONST_BITS 13 |
| %define PASS1_BITS 2 |
| |
| %define DESCALE_P1 (CONST_BITS-PASS1_BITS) |
| %define DESCALE_P2 (CONST_BITS+PASS1_BITS) |
| |
| %if CONST_BITS == 13 |
| F_0_298 equ 2446 ; FIX(0.298631336) |
| F_0_390 equ 3196 ; FIX(0.390180644) |
| F_0_541 equ 4433 ; FIX(0.541196100) |
| F_0_765 equ 6270 ; FIX(0.765366865) |
| F_0_899 equ 7373 ; FIX(0.899976223) |
| F_1_175 equ 9633 ; FIX(1.175875602) |
| F_1_501 equ 12299 ; FIX(1.501321110) |
| F_1_847 equ 15137 ; FIX(1.847759065) |
| F_1_961 equ 16069 ; FIX(1.961570560) |
| F_2_053 equ 16819 ; FIX(2.053119869) |
| F_2_562 equ 20995 ; FIX(2.562915447) |
| F_3_072 equ 25172 ; FIX(3.072711026) |
| %else |
| ; NASM cannot do compile-time arithmetic on floating-point constants. |
| %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) |
| F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336) |
| F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644) |
| F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100) |
| F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) |
| F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) |
| F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602) |
| F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110) |
| F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) |
| F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) |
| F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) |
| F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) |
| F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) |
| %endif |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| alignz 16 |
| global EXTN(jconst_fdct_islow_mmx) |
| |
| EXTN(jconst_fdct_islow_mmx): |
| |
| PW_F130_F054 times 2 dw (F_0_541+F_0_765), F_0_541 |
| PW_F054_MF130 times 2 dw F_0_541, (F_0_541-F_1_847) |
| PW_MF078_F117 times 2 dw (F_1_175-F_1_961), F_1_175 |
| PW_F117_F078 times 2 dw F_1_175, (F_1_175-F_0_390) |
| PW_MF060_MF089 times 2 dw (F_0_298-F_0_899),-F_0_899 |
| PW_MF089_F060 times 2 dw -F_0_899, (F_1_501-F_0_899) |
| PW_MF050_MF256 times 2 dw (F_2_053-F_2_562),-F_2_562 |
| PW_MF256_F050 times 2 dw -F_2_562, (F_3_072-F_2_562) |
| PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1-1) |
| PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2-1) |
| PW_DESCALE_P2X times 4 dw 1 << (PASS1_BITS-1) |
| |
| alignz 16 |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 32 |
| ; |
| ; Perform the forward DCT on one block of samples. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_fdct_islow_mmx (DCTELEM *data) |
| ; |
| |
| %define data(b) (b)+8 ; DCTELEM *data |
| |
| %define original_ebp ebp+0 |
| %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM] |
| %define WK_NUM 2 |
| |
| align 16 |
| global EXTN(jsimd_fdct_islow_mmx) |
| |
| EXTN(jsimd_fdct_islow_mmx): |
| 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, [wk(0)] |
| pushpic ebx |
| ; push ecx ; need not be preserved |
| ; push edx ; need not be preserved |
| ; push esi ; unused |
| ; push edi ; unused |
| |
| get_GOT ebx ; get GOT address |
| |
| ; ---- Pass 1: process rows. |
| |
| mov edx, POINTER [data(eax)] ; (DCTELEM *) |
| mov ecx, DCTSIZE/4 |
| alignx 16,7 |
| .rowloop: |
| |
| movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] |
| movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] |
| movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)] |
| movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)] |
| |
| ; mm0=(20 21 22 23), mm2=(24 25 26 27) |
| ; mm1=(30 31 32 33), mm3=(34 35 36 37) |
| |
| movq mm4,mm0 ; transpose coefficients(phase 1) |
| punpcklwd mm0,mm1 ; mm0=(20 30 21 31) |
| punpckhwd mm4,mm1 ; mm4=(22 32 23 33) |
| movq mm5,mm2 ; transpose coefficients(phase 1) |
| punpcklwd mm2,mm3 ; mm2=(24 34 25 35) |
| punpckhwd mm5,mm3 ; mm5=(26 36 27 37) |
| |
| movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] |
| movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] |
| movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)] |
| movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)] |
| |
| ; mm6=(00 01 02 03), mm1=(04 05 06 07) |
| ; mm7=(10 11 12 13), mm3=(14 15 16 17) |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33) |
| movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35) |
| |
| movq mm4,mm6 ; transpose coefficients(phase 1) |
| punpcklwd mm6,mm7 ; mm6=(00 10 01 11) |
| punpckhwd mm4,mm7 ; mm4=(02 12 03 13) |
| movq mm2,mm1 ; transpose coefficients(phase 1) |
| punpcklwd mm1,mm3 ; mm1=(04 14 05 15) |
| punpckhwd mm2,mm3 ; mm2=(06 16 07 17) |
| |
| movq mm7,mm6 ; transpose coefficients(phase 2) |
| punpckldq mm6,mm0 ; mm6=(00 10 20 30)=data0 |
| punpckhdq mm7,mm0 ; mm7=(01 11 21 31)=data1 |
| movq mm3,mm2 ; transpose coefficients(phase 2) |
| punpckldq mm2,mm5 ; mm2=(06 16 26 36)=data6 |
| punpckhdq mm3,mm5 ; mm3=(07 17 27 37)=data7 |
| |
| movq mm0,mm7 |
| movq mm5,mm6 |
| psubw mm7,mm2 ; mm7=data1-data6=tmp6 |
| psubw mm6,mm3 ; mm6=data0-data7=tmp7 |
| paddw mm0,mm2 ; mm0=data1+data6=tmp1 |
| paddw mm5,mm3 ; mm5=data0+data7=tmp0 |
| |
| movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33) |
| movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35) |
| movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 |
| movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 |
| |
| movq mm7,mm4 ; transpose coefficients(phase 2) |
| punpckldq mm4,mm2 ; mm4=(02 12 22 32)=data2 |
| punpckhdq mm7,mm2 ; mm7=(03 13 23 33)=data3 |
| movq mm6,mm1 ; transpose coefficients(phase 2) |
| punpckldq mm1,mm3 ; mm1=(04 14 24 34)=data4 |
| punpckhdq mm6,mm3 ; mm6=(05 15 25 35)=data5 |
| |
| movq mm2,mm7 |
| movq mm3,mm4 |
| paddw mm7,mm1 ; mm7=data3+data4=tmp3 |
| paddw mm4,mm6 ; mm4=data2+data5=tmp2 |
| psubw mm2,mm1 ; mm2=data3-data4=tmp4 |
| psubw mm3,mm6 ; mm3=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movq mm1,mm5 |
| movq mm6,mm0 |
| paddw mm5,mm7 ; mm5=tmp10 |
| paddw mm0,mm4 ; mm0=tmp11 |
| psubw mm1,mm7 ; mm1=tmp13 |
| psubw mm6,mm4 ; mm6=tmp12 |
| |
| movq mm7,mm5 |
| paddw mm5,mm0 ; mm5=tmp10+tmp11 |
| psubw mm7,mm0 ; mm7=tmp10-tmp11 |
| |
| psllw mm5,PASS1_BITS ; mm5=data0 |
| psllw mm7,PASS1_BITS ; mm7=data4 |
| |
| movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5 |
| movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm7 |
| |
| ; (Original) |
| ; z1 = (tmp12 + tmp13) * 0.541196100; |
| ; data2 = z1 + tmp13 * 0.765366865; |
| ; data6 = z1 + tmp12 * -1.847759065; |
| ; |
| ; (This implementation) |
| ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100; |
| ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065); |
| |
| movq mm4,mm1 ; mm1=tmp13 |
| movq mm0,mm1 |
| punpcklwd mm4,mm6 ; mm6=tmp12 |
| punpckhwd mm0,mm6 |
| movq mm1,mm4 |
| movq mm6,mm0 |
| pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L |
| pmaddwd mm0,[GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H |
| pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L |
| pmaddwd mm6,[GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H |
| |
| paddd mm4,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm0,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm4,DESCALE_P1 |
| psrad mm0,DESCALE_P1 |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm6,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm1,DESCALE_P1 |
| psrad mm6,DESCALE_P1 |
| |
| packssdw mm4,mm0 ; mm4=data2 |
| packssdw mm1,mm6 ; mm1=data6 |
| |
| movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 |
| movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm1 |
| |
| ; -- Odd part |
| |
| movq mm5, MMWORD [wk(0)] ; mm5=tmp6 |
| movq mm7, MMWORD [wk(1)] ; mm7=tmp7 |
| |
| movq mm0,mm2 ; mm2=tmp4 |
| movq mm6,mm3 ; mm3=tmp5 |
| paddw mm0,mm5 ; mm0=z3 |
| paddw mm6,mm7 ; mm6=z4 |
| |
| ; (Original) |
| ; z5 = (z3 + z4) * 1.175875602; |
| ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; |
| ; z3 += z5; z4 += z5; |
| ; |
| ; (This implementation) |
| ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; |
| ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); |
| |
| movq mm4,mm0 |
| movq mm1,mm0 |
| punpcklwd mm4,mm6 |
| punpckhwd mm1,mm6 |
| movq mm0,mm4 |
| movq mm6,mm1 |
| pmaddwd mm4,[GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H |
| pmaddwd mm0,[GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L |
| pmaddwd mm6,[GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=z3L |
| movq MMWORD [wk(1)], mm1 ; wk(1)=z3H |
| |
| ; (Original) |
| ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6; |
| ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869; |
| ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110; |
| ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; |
| ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4; |
| ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4; |
| ; |
| ; (This implementation) |
| ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223; |
| ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447; |
| ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447); |
| ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223); |
| ; data7 = tmp4 + z3; data5 = tmp5 + z4; |
| ; data3 = tmp6 + z3; data1 = tmp7 + z4; |
| |
| movq mm4,mm2 |
| movq mm1,mm2 |
| punpcklwd mm4,mm7 |
| punpckhwd mm1,mm7 |
| movq mm2,mm4 |
| movq mm7,mm1 |
| pmaddwd mm4,[GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H |
| pmaddwd mm2,[GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H |
| |
| paddd mm4, MMWORD [wk(0)] ; mm4=data7L |
| paddd mm1, MMWORD [wk(1)] ; mm1=data7H |
| paddd mm2,mm0 ; mm2=data1L |
| paddd mm7,mm6 ; mm7=data1H |
| |
| paddd mm4,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm4,DESCALE_P1 |
| psrad mm1,DESCALE_P1 |
| paddd mm2,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm7,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm2,DESCALE_P1 |
| psrad mm7,DESCALE_P1 |
| |
| packssdw mm4,mm1 ; mm4=data7 |
| packssdw mm2,mm7 ; mm2=data1 |
| |
| movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm4 |
| movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2 |
| |
| movq mm1,mm3 |
| movq mm7,mm3 |
| punpcklwd mm1,mm5 |
| punpckhwd mm7,mm5 |
| movq mm3,mm1 |
| movq mm5,mm7 |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H |
| pmaddwd mm3,[GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L |
| pmaddwd mm5,[GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H |
| |
| paddd mm1,mm0 ; mm1=data5L |
| paddd mm7,mm6 ; mm7=data5H |
| paddd mm3, MMWORD [wk(0)] ; mm3=data3L |
| paddd mm5, MMWORD [wk(1)] ; mm5=data3H |
| |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm7,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm1,DESCALE_P1 |
| psrad mm7,DESCALE_P1 |
| paddd mm3,[GOTOFF(ebx,PD_DESCALE_P1)] |
| paddd mm5,[GOTOFF(ebx,PD_DESCALE_P1)] |
| psrad mm3,DESCALE_P1 |
| psrad mm5,DESCALE_P1 |
| |
| packssdw mm1,mm7 ; mm1=data5 |
| packssdw mm3,mm5 ; mm3=data3 |
| |
| movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm1 |
| movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3 |
| |
| add edx, byte 4*DCTSIZE*SIZEOF_DCTELEM |
| dec ecx |
| jnz near .rowloop |
| |
| ; ---- Pass 2: process columns. |
| |
| mov edx, POINTER [data(eax)] ; (DCTELEM *) |
| mov ecx, DCTSIZE/4 |
| alignx 16,7 |
| .columnloop: |
| |
| movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)] |
| movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)] |
| movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)] |
| movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)] |
| |
| ; mm0=(02 12 22 32), mm2=(42 52 62 72) |
| ; mm1=(03 13 23 33), mm3=(43 53 63 73) |
| |
| movq mm4,mm0 ; transpose coefficients(phase 1) |
| punpcklwd mm0,mm1 ; mm0=(02 03 12 13) |
| punpckhwd mm4,mm1 ; mm4=(22 23 32 33) |
| movq mm5,mm2 ; transpose coefficients(phase 1) |
| punpcklwd mm2,mm3 ; mm2=(42 43 52 53) |
| punpckhwd mm5,mm3 ; mm5=(62 63 72 73) |
| |
| movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)] |
| movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)] |
| movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)] |
| movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)] |
| |
| ; mm6=(00 10 20 30), mm1=(40 50 60 70) |
| ; mm7=(01 11 21 31), mm3=(41 51 61 71) |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33) |
| movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53) |
| |
| movq mm4,mm6 ; transpose coefficients(phase 1) |
| punpcklwd mm6,mm7 ; mm6=(00 01 10 11) |
| punpckhwd mm4,mm7 ; mm4=(20 21 30 31) |
| movq mm2,mm1 ; transpose coefficients(phase 1) |
| punpcklwd mm1,mm3 ; mm1=(40 41 50 51) |
| punpckhwd mm2,mm3 ; mm2=(60 61 70 71) |
| |
| movq mm7,mm6 ; transpose coefficients(phase 2) |
| punpckldq mm6,mm0 ; mm6=(00 01 02 03)=data0 |
| punpckhdq mm7,mm0 ; mm7=(10 11 12 13)=data1 |
| movq mm3,mm2 ; transpose coefficients(phase 2) |
| punpckldq mm2,mm5 ; mm2=(60 61 62 63)=data6 |
| punpckhdq mm3,mm5 ; mm3=(70 71 72 73)=data7 |
| |
| movq mm0,mm7 |
| movq mm5,mm6 |
| psubw mm7,mm2 ; mm7=data1-data6=tmp6 |
| psubw mm6,mm3 ; mm6=data0-data7=tmp7 |
| paddw mm0,mm2 ; mm0=data1+data6=tmp1 |
| paddw mm5,mm3 ; mm5=data0+data7=tmp0 |
| |
| movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33) |
| movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53) |
| movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6 |
| movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7 |
| |
| movq mm7,mm4 ; transpose coefficients(phase 2) |
| punpckldq mm4,mm2 ; mm4=(20 21 22 23)=data2 |
| punpckhdq mm7,mm2 ; mm7=(30 31 32 33)=data3 |
| movq mm6,mm1 ; transpose coefficients(phase 2) |
| punpckldq mm1,mm3 ; mm1=(40 41 42 43)=data4 |
| punpckhdq mm6,mm3 ; mm6=(50 51 52 53)=data5 |
| |
| movq mm2,mm7 |
| movq mm3,mm4 |
| paddw mm7,mm1 ; mm7=data3+data4=tmp3 |
| paddw mm4,mm6 ; mm4=data2+data5=tmp2 |
| psubw mm2,mm1 ; mm2=data3-data4=tmp4 |
| psubw mm3,mm6 ; mm3=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movq mm1,mm5 |
| movq mm6,mm0 |
| paddw mm5,mm7 ; mm5=tmp10 |
| paddw mm0,mm4 ; mm0=tmp11 |
| psubw mm1,mm7 ; mm1=tmp13 |
| psubw mm6,mm4 ; mm6=tmp12 |
| |
| movq mm7,mm5 |
| paddw mm5,mm0 ; mm5=tmp10+tmp11 |
| psubw mm7,mm0 ; mm7=tmp10-tmp11 |
| |
| paddw mm5,[GOTOFF(ebx,PW_DESCALE_P2X)] |
| paddw mm7,[GOTOFF(ebx,PW_DESCALE_P2X)] |
| psraw mm5,PASS1_BITS ; mm5=data0 |
| psraw mm7,PASS1_BITS ; mm7=data4 |
| |
| movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm5 |
| movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm7 |
| |
| ; (Original) |
| ; z1 = (tmp12 + tmp13) * 0.541196100; |
| ; data2 = z1 + tmp13 * 0.765366865; |
| ; data6 = z1 + tmp12 * -1.847759065; |
| ; |
| ; (This implementation) |
| ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100; |
| ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065); |
| |
| movq mm4,mm1 ; mm1=tmp13 |
| movq mm0,mm1 |
| punpcklwd mm4,mm6 ; mm6=tmp12 |
| punpckhwd mm0,mm6 |
| movq mm1,mm4 |
| movq mm6,mm0 |
| pmaddwd mm4,[GOTOFF(ebx,PW_F130_F054)] ; mm4=data2L |
| pmaddwd mm0,[GOTOFF(ebx,PW_F130_F054)] ; mm0=data2H |
| pmaddwd mm1,[GOTOFF(ebx,PW_F054_MF130)] ; mm1=data6L |
| pmaddwd mm6,[GOTOFF(ebx,PW_F054_MF130)] ; mm6=data6H |
| |
| paddd mm4,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm0,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm4,DESCALE_P2 |
| psrad mm0,DESCALE_P2 |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm6,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm1,DESCALE_P2 |
| psrad mm6,DESCALE_P2 |
| |
| packssdw mm4,mm0 ; mm4=data2 |
| packssdw mm1,mm6 ; mm1=data6 |
| |
| movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4 |
| movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm1 |
| |
| ; -- Odd part |
| |
| movq mm5, MMWORD [wk(0)] ; mm5=tmp6 |
| movq mm7, MMWORD [wk(1)] ; mm7=tmp7 |
| |
| movq mm0,mm2 ; mm2=tmp4 |
| movq mm6,mm3 ; mm3=tmp5 |
| paddw mm0,mm5 ; mm0=z3 |
| paddw mm6,mm7 ; mm6=z4 |
| |
| ; (Original) |
| ; z5 = (z3 + z4) * 1.175875602; |
| ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644; |
| ; z3 += z5; z4 += z5; |
| ; |
| ; (This implementation) |
| ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602; |
| ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644); |
| |
| movq mm4,mm0 |
| movq mm1,mm0 |
| punpcklwd mm4,mm6 |
| punpckhwd mm1,mm6 |
| movq mm0,mm4 |
| movq mm6,mm1 |
| pmaddwd mm4,[GOTOFF(ebx,PW_MF078_F117)] ; mm4=z3L |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF078_F117)] ; mm1=z3H |
| pmaddwd mm0,[GOTOFF(ebx,PW_F117_F078)] ; mm0=z4L |
| pmaddwd mm6,[GOTOFF(ebx,PW_F117_F078)] ; mm6=z4H |
| |
| movq MMWORD [wk(0)], mm4 ; wk(0)=z3L |
| movq MMWORD [wk(1)], mm1 ; wk(1)=z3H |
| |
| ; (Original) |
| ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6; |
| ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869; |
| ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110; |
| ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447; |
| ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4; |
| ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4; |
| ; |
| ; (This implementation) |
| ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223; |
| ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447; |
| ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447); |
| ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223); |
| ; data7 = tmp4 + z3; data5 = tmp5 + z4; |
| ; data3 = tmp6 + z3; data1 = tmp7 + z4; |
| |
| movq mm4,mm2 |
| movq mm1,mm2 |
| punpcklwd mm4,mm7 |
| punpckhwd mm1,mm7 |
| movq mm2,mm4 |
| movq mm7,mm1 |
| pmaddwd mm4,[GOTOFF(ebx,PW_MF060_MF089)] ; mm4=tmp4L |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF060_MF089)] ; mm1=tmp4H |
| pmaddwd mm2,[GOTOFF(ebx,PW_MF089_F060)] ; mm2=tmp7L |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF089_F060)] ; mm7=tmp7H |
| |
| paddd mm4, MMWORD [wk(0)] ; mm4=data7L |
| paddd mm1, MMWORD [wk(1)] ; mm1=data7H |
| paddd mm2,mm0 ; mm2=data1L |
| paddd mm7,mm6 ; mm7=data1H |
| |
| paddd mm4,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm4,DESCALE_P2 |
| psrad mm1,DESCALE_P2 |
| paddd mm2,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm7,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm2,DESCALE_P2 |
| psrad mm7,DESCALE_P2 |
| |
| packssdw mm4,mm1 ; mm4=data7 |
| packssdw mm2,mm7 ; mm2=data1 |
| |
| movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm4 |
| movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm2 |
| |
| movq mm1,mm3 |
| movq mm7,mm3 |
| punpcklwd mm1,mm5 |
| punpckhwd mm7,mm5 |
| movq mm3,mm1 |
| movq mm5,mm7 |
| pmaddwd mm1,[GOTOFF(ebx,PW_MF050_MF256)] ; mm1=tmp5L |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF050_MF256)] ; mm7=tmp5H |
| pmaddwd mm3,[GOTOFF(ebx,PW_MF256_F050)] ; mm3=tmp6L |
| pmaddwd mm5,[GOTOFF(ebx,PW_MF256_F050)] ; mm5=tmp6H |
| |
| paddd mm1,mm0 ; mm1=data5L |
| paddd mm7,mm6 ; mm7=data5H |
| paddd mm3, MMWORD [wk(0)] ; mm3=data3L |
| paddd mm5, MMWORD [wk(1)] ; mm5=data3H |
| |
| paddd mm1,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm7,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm1,DESCALE_P2 |
| psrad mm7,DESCALE_P2 |
| paddd mm3,[GOTOFF(ebx,PD_DESCALE_P2)] |
| paddd mm5,[GOTOFF(ebx,PD_DESCALE_P2)] |
| psrad mm3,DESCALE_P2 |
| psrad mm5,DESCALE_P2 |
| |
| packssdw mm1,mm7 ; mm1=data5 |
| packssdw mm3,mm5 ; mm3=data3 |
| |
| movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm1 |
| movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm3 |
| |
| add edx, byte 4*SIZEOF_DCTELEM |
| dec ecx |
| jnz near .columnloop |
| |
| emms ; empty MMX state |
| |
| ; pop edi ; unused |
| ; pop esi ; unused |
| ; pop edx ; need not be preserved |
| ; pop ecx ; need not be preserved |
| poppic 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 |
