; ; jfdctint.asm - accurate integer FDCT (SSE2) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright (C) 2016, 2020, D. R. Commander. ; ; 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 slower but more 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. %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 32 GLOBAL_DATA(jconst_fdct_islow_sse2) EXTN(jconst_fdct_islow_sse2): PW_F130_F054 times 4 dw (F_0_541 + F_0_765), F_0_541 PW_F054_MF130 times 4 dw F_0_541, (F_0_541 - F_1_847) PW_MF078_F117 times 4 dw (F_1_175 - F_1_961), F_1_175 PW_F117_F078 times 4 dw F_1_175, (F_1_175 - F_0_390) PW_MF060_MF089 times 4 dw (F_0_298 - F_0_899), -F_0_899 PW_MF089_F060 times 4 dw -F_0_899, (F_1_501 - F_0_899) PW_MF050_MF256 times 4 dw (F_2_053 - F_2_562), -F_2_562 PW_MF256_F050 times 4 dw -F_2_562, (F_3_072 - F_2_562) PD_DESCALE_P1 times 4 dd 1 << (DESCALE_P1 - 1) PD_DESCALE_P2 times 4 dd 1 << (DESCALE_P2 - 1) PW_DESCALE_P2X times 8 dw 1 << (PASS1_BITS - 1) alignz 32 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Perform the forward DCT on one block of samples. ; ; GLOBAL(void) ; jsimd_fdct_islow_sse2(DCTELEM *data) ; %define data(b) (b) + 8 ; DCTELEM *data %define original_ebp ebp + 0 %define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD ; xmmword wk[WK_NUM] %define WK_NUM 6 align 32 GLOBAL_FUNCTION(jsimd_fdct_islow_sse2) EXTN(jsimd_fdct_islow_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, [wk(0)] pushpic ebx ; push ecx ; unused ; 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 *) movdqa xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_DCTELEM)] movdqa xmm2, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_DCTELEM)] ; xmm0=(00 01 02 03 04 05 06 07), xmm2=(20 21 22 23 24 25 26 27) ; xmm1=(10 11 12 13 14 15 16 17), xmm3=(30 31 32 33 34 35 36 37) movdqa xmm4, xmm0 ; transpose coefficients(phase 1) punpcklwd xmm0, xmm1 ; xmm0=(00 10 01 11 02 12 03 13) punpckhwd xmm4, xmm1 ; xmm4=(04 14 05 15 06 16 07 17) movdqa xmm5, xmm2 ; transpose coefficients(phase 1) punpcklwd xmm2, xmm3 ; xmm2=(20 30 21 31 22 32 23 33) punpckhwd xmm5, xmm3 ; xmm5=(24 34 25 35 26 36 27 37) movdqa xmm6, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_DCTELEM)] movdqa xmm7, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_DCTELEM)] ; xmm6=( 4 12 20 28 36 44 52 60), xmm1=( 6 14 22 30 38 46 54 62) ; xmm7=( 5 13 21 29 37 45 53 61), xmm3=( 7 15 23 31 39 47 55 63) movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(20 30 21 31 22 32 23 33) movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(24 34 25 35 26 36 27 37) movdqa xmm2, xmm6 ; transpose coefficients(phase 1) punpcklwd xmm6, xmm7 ; xmm6=(40 50 41 51 42 52 43 53) punpckhwd xmm2, xmm7 ; xmm2=(44 54 45 55 46 56 47 57) movdqa xmm5, xmm1 ; transpose coefficients(phase 1) punpcklwd xmm1, xmm3 ; xmm1=(60 70 61 71 62 72 63 73) punpckhwd xmm5, xmm3 ; xmm5=(64 74 65 75 66 76 67 77) movdqa xmm7, xmm6 ; transpose coefficients(phase 2) punpckldq xmm6, xmm1 ; xmm6=(40 50 60 70 41 51 61 71) punpckhdq xmm7, xmm1 ; xmm7=(42 52 62 72 43 53 63 73) movdqa xmm3, xmm2 ; transpose coefficients(phase 2) punpckldq xmm2, xmm5 ; xmm2=(44 54 64 74 45 55 65 75) punpckhdq xmm3, xmm5 ; xmm3=(46 56 66 76 47 57 67 77) movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(20 30 21 31 22 32 23 33) movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(24 34 25 35 26 36 27 37) movdqa XMMWORD [wk(2)], xmm7 ; wk(2)=(42 52 62 72 43 53 63 73) movdqa XMMWORD [wk(3)], xmm2 ; wk(3)=(44 54 64 74 45 55 65 75) movdqa xmm7, xmm0 ; transpose coefficients(phase 2) punpckldq xmm0, xmm1 ; xmm0=(00 10 20 30 01 11 21 31) punpckhdq xmm7, xmm1 ; xmm7=(02 12 22 32 03 13 23 33) movdqa xmm2, xmm4 ; transpose coefficients(phase 2) punpckldq xmm4, xmm5 ; xmm4=(04 14 24 34 05 15 25 35) punpckhdq xmm2, xmm5 ; xmm2=(06 16 26 36 07 17 27 37) movdqa xmm1, xmm0 ; transpose coefficients(phase 3) punpcklqdq xmm0, xmm6 ; xmm0=(00 10 20 30 40 50 60 70)=data0 punpckhqdq xmm1, xmm6 ; xmm1=(01 11 21 31 41 51 61 71)=data1 movdqa xmm5, xmm2 ; transpose coefficients(phase 3) punpcklqdq xmm2, xmm3 ; xmm2=(06 16 26 36 46 56 66 76)=data6 punpckhqdq xmm5, xmm3 ; xmm5=(07 17 27 37 47 57 67 77)=data7 movdqa xmm6, xmm1 movdqa xmm3, xmm0 psubw xmm1, xmm2 ; xmm1=data1-data6=tmp6 psubw xmm0, xmm5 ; xmm0=data0-data7=tmp7 paddw xmm6, xmm2 ; xmm6=data1+data6=tmp1 paddw xmm3, xmm5 ; xmm3=data0+data7=tmp0 movdqa xmm2, XMMWORD [wk(2)] ; xmm2=(42 52 62 72 43 53 63 73) movdqa xmm5, XMMWORD [wk(3)] ; xmm5=(44 54 64 74 45 55 65 75) movdqa XMMWORD [wk(0)], xmm1 ; wk(0)=tmp6 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp7 movdqa xmm1, xmm7 ; transpose coefficients(phase 3) punpcklqdq xmm7, xmm2 ; xmm7=(02 12 22 32 42 52 62 72)=data2 punpckhqdq xmm1, xmm2 ; xmm1=(03 13 23 33 43 53 63 73)=data3 movdqa xmm0, xmm4 ; transpose coefficients(phase 3) punpcklqdq xmm4, xmm5 ; xmm4=(04 14 24 34 44 54 64 74)=data4 punpckhqdq xmm0, xmm5 ; xmm0=(05 15 25 35 45 55 65 75)=data5 movdqa xmm2, xmm1 movdqa xmm5, xmm7 paddw xmm1, xmm4 ; xmm1=data3+data4=tmp3 paddw xmm7, xmm0 ; xmm7=data2+data5=tmp2 psubw xmm2, xmm4 ; xmm2=data3-data4=tmp4 psubw xmm5, xmm0 ; xmm5=data2-data5=tmp5 ; -- Even part movdqa xmm4, xmm3 movdqa xmm0, xmm6 paddw xmm3, xmm1 ; xmm3=tmp10 paddw xmm6, xmm7 ; xmm6=tmp11 psubw xmm4, xmm1 ; xmm4=tmp13 psubw xmm0, xmm7 ; xmm0=tmp12 movdqa xmm1, xmm3 paddw xmm3, xmm6 ; xmm3=tmp10+tmp11 psubw xmm1, xmm6 ; xmm1=tmp10-tmp11 psllw xmm3, PASS1_BITS ; xmm3=data0 psllw xmm1, PASS1_BITS ; xmm1=data4 movdqa XMMWORD [wk(2)], xmm3 ; wk(2)=data0 movdqa XMMWORD [wk(3)], xmm1 ; wk(3)=data4 ; (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); movdqa xmm7, xmm4 ; xmm4=tmp13 movdqa xmm6, xmm4 punpcklwd xmm7, xmm0 ; xmm0=tmp12 punpckhwd xmm6, xmm0 movdqa xmm4, xmm7 movdqa xmm0, xmm6 pmaddwd xmm7, [GOTOFF(ebx,PW_F130_F054)] ; xmm7=data2L pmaddwd xmm6, [GOTOFF(ebx,PW_F130_F054)] ; xmm6=data2H pmaddwd xmm4, [GOTOFF(ebx,PW_F054_MF130)] ; xmm4=data6L pmaddwd xmm0, [GOTOFF(ebx,PW_F054_MF130)] ; xmm0=data6H paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm6, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm7, DESCALE_P1 psrad xmm6, DESCALE_P1 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm0, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm4, DESCALE_P1 psrad xmm0, DESCALE_P1 packssdw xmm7, xmm6 ; xmm7=data2 packssdw xmm4, xmm0 ; xmm4=data6 movdqa XMMWORD [wk(4)], xmm7 ; wk(4)=data2 movdqa XMMWORD [wk(5)], xmm4 ; wk(5)=data6 ; -- Odd part movdqa xmm3, XMMWORD [wk(0)] ; xmm3=tmp6 movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp7 movdqa xmm6, xmm2 ; xmm2=tmp4 movdqa xmm0, xmm5 ; xmm5=tmp5 paddw xmm6, xmm3 ; xmm6=z3 paddw xmm0, xmm1 ; xmm0=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); movdqa xmm7, xmm6 movdqa xmm4, xmm6 punpcklwd xmm7, xmm0 punpckhwd xmm4, xmm0 movdqa xmm6, xmm7 movdqa xmm0, xmm4 pmaddwd xmm7, [GOTOFF(ebx,PW_MF078_F117)] ; xmm7=z3L pmaddwd xmm4, [GOTOFF(ebx,PW_MF078_F117)] ; xmm4=z3H pmaddwd xmm6, [GOTOFF(ebx,PW_F117_F078)] ; xmm6=z4L pmaddwd xmm0, [GOTOFF(ebx,PW_F117_F078)] ; xmm0=z4H movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=z3L movdqa XMMWORD [wk(1)], xmm4 ; 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; movdqa xmm7, xmm2 movdqa xmm4, xmm2 punpcklwd xmm7, xmm1 punpckhwd xmm4, xmm1 movdqa xmm2, xmm7 movdqa xmm1, xmm4 pmaddwd xmm7, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm7=tmp4L pmaddwd xmm4, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm4=tmp4H pmaddwd xmm2, [GOTOFF(ebx,PW_MF089_F060)] ; xmm2=tmp7L pmaddwd xmm1, [GOTOFF(ebx,PW_MF089_F060)] ; xmm1=tmp7H paddd xmm7, XMMWORD [wk(0)] ; xmm7=data7L paddd xmm4, XMMWORD [wk(1)] ; xmm4=data7H paddd xmm2, xmm6 ; xmm2=data1L paddd xmm1, xmm0 ; xmm1=data1H paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm7, DESCALE_P1 psrad xmm4, DESCALE_P1 paddd xmm2, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm2, DESCALE_P1 psrad xmm1, DESCALE_P1 packssdw xmm7, xmm4 ; xmm7=data7 packssdw xmm2, xmm1 ; xmm2=data1 movdqa xmm4, xmm5 movdqa xmm1, xmm5 punpcklwd xmm4, xmm3 punpckhwd xmm1, xmm3 movdqa xmm5, xmm4 movdqa xmm3, xmm1 pmaddwd xmm4, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm4=tmp5L pmaddwd xmm1, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm1=tmp5H pmaddwd xmm5, [GOTOFF(ebx,PW_MF256_F050)] ; xmm5=tmp6L pmaddwd xmm3, [GOTOFF(ebx,PW_MF256_F050)] ; xmm3=tmp6H paddd xmm4, xmm6 ; xmm4=data5L paddd xmm1, xmm0 ; xmm1=data5H paddd xmm5, XMMWORD [wk(0)] ; xmm5=data3L paddd xmm3, XMMWORD [wk(1)] ; xmm3=data3H paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm4, DESCALE_P1 psrad xmm1, DESCALE_P1 paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P1)] paddd xmm3, [GOTOFF(ebx,PD_DESCALE_P1)] psrad xmm5, DESCALE_P1 psrad xmm3, DESCALE_P1 packssdw xmm4, xmm1 ; xmm4=data5 packssdw xmm5, xmm3 ; xmm5=data3 ; ---- Pass 2: process columns. ; mov edx, POINTER [data(eax)] ; (DCTELEM *) movdqa xmm6, XMMWORD [wk(2)] ; xmm6=col0 movdqa xmm0, XMMWORD [wk(4)] ; xmm0=col2 ; xmm6=(00 10 20 30 40 50 60 70), xmm0=(02 12 22 32 42 52 62 72) ; xmm2=(01 11 21 31 41 51 61 71), xmm5=(03 13 23 33 43 53 63 73) movdqa xmm1, xmm6 ; transpose coefficients(phase 1) punpcklwd xmm6, xmm2 ; xmm6=(00 01 10 11 20 21 30 31) punpckhwd xmm1, xmm2 ; xmm1=(40 41 50 51 60 61 70 71) movdqa xmm3, xmm0 ; transpose coefficients(phase 1) punpcklwd xmm0, xmm5 ; xmm0=(02 03 12 13 22 23 32 33) punpckhwd xmm3, xmm5 ; xmm3=(42 43 52 53 62 63 72 73) movdqa xmm2, XMMWORD [wk(3)] ; xmm2=col4 movdqa xmm5, XMMWORD [wk(5)] ; xmm5=col6 ; xmm2=(04 14 24 34 44 54 64 74), xmm5=(06 16 26 36 46 56 66 76) ; xmm4=(05 15 25 35 45 55 65 75), xmm7=(07 17 27 37 47 57 67 77) movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=(02 03 12 13 22 23 32 33) movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=(42 43 52 53 62 63 72 73) movdqa xmm0, xmm2 ; transpose coefficients(phase 1) punpcklwd xmm2, xmm4 ; xmm2=(04 05 14 15 24 25 34 35) punpckhwd xmm0, xmm4 ; xmm0=(44 45 54 55 64 65 74 75) movdqa xmm3, xmm5 ; transpose coefficients(phase 1) punpcklwd xmm5, xmm7 ; xmm5=(06 07 16 17 26 27 36 37) punpckhwd xmm3, xmm7 ; xmm3=(46 47 56 57 66 67 76 77) movdqa xmm4, xmm2 ; transpose coefficients(phase 2) punpckldq xmm2, xmm5 ; xmm2=(04 05 06 07 14 15 16 17) punpckhdq xmm4, xmm5 ; xmm4=(24 25 26 27 34 35 36 37) movdqa xmm7, xmm0 ; transpose coefficients(phase 2) punpckldq xmm0, xmm3 ; xmm0=(44 45 46 47 54 55 56 57) punpckhdq xmm7, xmm3 ; xmm7=(64 65 66 67 74 75 76 77) movdqa xmm5, XMMWORD [wk(0)] ; xmm5=(02 03 12 13 22 23 32 33) movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(42 43 52 53 62 63 72 73) movdqa XMMWORD [wk(2)], xmm4 ; wk(2)=(24 25 26 27 34 35 36 37) movdqa XMMWORD [wk(3)], xmm0 ; wk(3)=(44 45 46 47 54 55 56 57) movdqa xmm4, xmm6 ; transpose coefficients(phase 2) punpckldq xmm6, xmm5 ; xmm6=(00 01 02 03 10 11 12 13) punpckhdq xmm4, xmm5 ; xmm4=(20 21 22 23 30 31 32 33) movdqa xmm0, xmm1 ; transpose coefficients(phase 2) punpckldq xmm1, xmm3 ; xmm1=(40 41 42 43 50 51 52 53) punpckhdq xmm0, xmm3 ; xmm0=(60 61 62 63 70 71 72 73) movdqa xmm5, xmm6 ; transpose coefficients(phase 3) punpcklqdq xmm6, xmm2 ; xmm6=(00 01 02 03 04 05 06 07)=data0 punpckhqdq xmm5, xmm2 ; xmm5=(10 11 12 13 14 15 16 17)=data1 movdqa xmm3, xmm0 ; transpose coefficients(phase 3) punpcklqdq xmm0, xmm7 ; xmm0=(60 61 62 63 64 65 66 67)=data6 punpckhqdq xmm3, xmm7 ; xmm3=(70 71 72 73 74 75 76 77)=data7 movdqa xmm2, xmm5 movdqa xmm7, xmm6 psubw xmm5, xmm0 ; xmm5=data1-data6=tmp6 psubw xmm6, xmm3 ; xmm6=data0-data7=tmp7 paddw xmm2, xmm0 ; xmm2=data1+data6=tmp1 paddw xmm7, xmm3 ; xmm7=data0+data7=tmp0 movdqa xmm0, XMMWORD [wk(2)] ; xmm0=(24 25 26 27 34 35 36 37) movdqa xmm3, XMMWORD [wk(3)] ; xmm3=(44 45 46 47 54 55 56 57) movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=tmp6 movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp7 movdqa xmm5, xmm4 ; transpose coefficients(phase 3) punpcklqdq xmm4, xmm0 ; xmm4=(20 21 22 23 24 25 26 27)=data2 punpckhqdq xmm5, xmm0 ; xmm5=(30 31 32 33 34 35 36 37)=data3 movdqa xmm6, xmm1 ; transpose coefficients(phase 3) punpcklqdq xmm1, xmm3 ; xmm1=(40 41 42 43 44 45 46 47)=data4 punpckhqdq xmm6, xmm3 ; xmm6=(50 51 52 53 54 55 56 57)=data5 movdqa xmm0, xmm5 movdqa xmm3, xmm4 paddw xmm5, xmm1 ; xmm5=data3+data4=tmp3 paddw xmm4, xmm6 ; xmm4=data2+data5=tmp2 psubw xmm0, xmm1 ; xmm0=data3-data4=tmp4 psubw xmm3, xmm6 ; xmm3=data2-data5=tmp5 ; -- Even part movdqa xmm1, xmm7 movdqa xmm6, xmm2 paddw xmm7, xmm5 ; xmm7=tmp10 paddw xmm2, xmm4 ; xmm2=tmp11 psubw xmm1, xmm5 ; xmm1=tmp13 psubw xmm6, xmm4 ; xmm6=tmp12 movdqa xmm5, xmm7 paddw xmm7, xmm2 ; xmm7=tmp10+tmp11 psubw xmm5, xmm2 ; xmm5=tmp10-tmp11 paddw xmm7, [GOTOFF(ebx,PW_DESCALE_P2X)] paddw xmm5, [GOTOFF(ebx,PW_DESCALE_P2X)] psraw xmm7, PASS1_BITS ; xmm7=data0 psraw xmm5, PASS1_BITS ; xmm5=data4 movdqa XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_DCTELEM)], xmm7 movdqa XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_DCTELEM)], xmm5 ; (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); movdqa xmm4, xmm1 ; xmm1=tmp13 movdqa xmm2, xmm1 punpcklwd xmm4, xmm6 ; xmm6=tmp12 punpckhwd xmm2, xmm6 movdqa xmm1, xmm4 movdqa xmm6, xmm2 pmaddwd xmm4, [GOTOFF(ebx,PW_F130_F054)] ; xmm4=data2L pmaddwd xmm2, [GOTOFF(ebx,PW_F130_F054)] ; xmm2=data2H pmaddwd xmm1, [GOTOFF(ebx,PW_F054_MF130)] ; xmm1=data6L pmaddwd xmm6, [GOTOFF(ebx,PW_F054_MF130)] ; xmm6=data6H paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm2, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm4, DESCALE_P2 psrad xmm2, DESCALE_P2 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm6, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm1, DESCALE_P2 psrad xmm6, DESCALE_P2 packssdw xmm4, xmm2 ; xmm4=data2 packssdw xmm1, xmm6 ; xmm1=data6 movdqa XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_DCTELEM)], xmm4 movdqa XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_DCTELEM)], xmm1 ; -- Odd part movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp6 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp7 movdqa xmm2, xmm0 ; xmm0=tmp4 movdqa xmm6, xmm3 ; xmm3=tmp5 paddw xmm2, xmm7 ; xmm2=z3 paddw xmm6, xmm5 ; xmm6=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); movdqa xmm4, xmm2 movdqa xmm1, xmm2 punpcklwd xmm4, xmm6 punpckhwd xmm1, xmm6 movdqa xmm2, xmm4 movdqa xmm6, xmm1 pmaddwd xmm4, [GOTOFF(ebx,PW_MF078_F117)] ; xmm4=z3L pmaddwd xmm1, [GOTOFF(ebx,PW_MF078_F117)] ; xmm1=z3H pmaddwd xmm2, [GOTOFF(ebx,PW_F117_F078)] ; xmm2=z4L pmaddwd xmm6, [GOTOFF(ebx,PW_F117_F078)] ; xmm6=z4H movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=z3L movdqa XMMWORD [wk(1)], xmm1 ; 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; movdqa xmm4, xmm0 movdqa xmm1, xmm0 punpcklwd xmm4, xmm5 punpckhwd xmm1, xmm5 movdqa xmm0, xmm4 movdqa xmm5, xmm1 pmaddwd xmm4, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm4=tmp4L pmaddwd xmm1, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm1=tmp4H pmaddwd xmm0, [GOTOFF(ebx,PW_MF089_F060)] ; xmm0=tmp7L pmaddwd xmm5, [GOTOFF(ebx,PW_MF089_F060)] ; xmm5=tmp7H paddd xmm4, XMMWORD [wk(0)] ; xmm4=data7L paddd xmm1, XMMWORD [wk(1)] ; xmm1=data7H paddd xmm0, xmm2 ; xmm0=data1L paddd xmm5, xmm6 ; xmm5=data1H paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm4, DESCALE_P2 psrad xmm1, DESCALE_P2 paddd xmm0, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm0, DESCALE_P2 psrad xmm5, DESCALE_P2 packssdw xmm4, xmm1 ; xmm4=data7 packssdw xmm0, xmm5 ; xmm0=data1 movdqa XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_DCTELEM)], xmm4 movdqa XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_DCTELEM)], xmm0 movdqa xmm1, xmm3 movdqa xmm5, xmm3 punpcklwd xmm1, xmm7 punpckhwd xmm5, xmm7 movdqa xmm3, xmm1 movdqa xmm7, xmm5 pmaddwd xmm1, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm1=tmp5L pmaddwd xmm5, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm5=tmp5H pmaddwd xmm3, [GOTOFF(ebx,PW_MF256_F050)] ; xmm3=tmp6L pmaddwd xmm7, [GOTOFF(ebx,PW_MF256_F050)] ; xmm7=tmp6H paddd xmm1, xmm2 ; xmm1=data5L paddd xmm5, xmm6 ; xmm5=data5H paddd xmm3, XMMWORD [wk(0)] ; xmm3=data3L paddd xmm7, XMMWORD [wk(1)] ; xmm7=data3H paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm1, DESCALE_P2 psrad xmm5, DESCALE_P2 paddd xmm3, [GOTOFF(ebx,PD_DESCALE_P2)] paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P2)] psrad xmm3, DESCALE_P2 psrad xmm7, DESCALE_P2 packssdw xmm1, xmm5 ; xmm1=data5 packssdw xmm3, xmm7 ; xmm3=data3 movdqa XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_DCTELEM)], xmm1 movdqa XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_DCTELEM)], xmm3 ; pop edi ; unused ; pop esi ; unused ; pop edx ; need not be preserved ; pop ecx ; unused 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 32