; ; jfss2int.asm - accurate integer FDCT (64-bit SSE2) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright 2009 D. R. Commander ; ; 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_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 16 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 64 ; ; Perform the forward DCT on one block of samples. ; ; GLOBAL(void) ; jsimd_fdct_islow_sse2 (DCTELEM * data) ; ; r10 = DCTELEM * data %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] %define WK_NUM 6 align 16 global EXTN(jsimd_fdct_islow_sse2) EXTN(jsimd_fdct_islow_sse2): push rbp mov rax,rsp ; rax = original rbp sub rsp, byte 4 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits mov [rsp],rax mov rbp,rsp ; rbp = aligned rbp lea rsp, [wk(0)] collect_args ; ---- Pass 1: process rows. mov rdx, r10 ; (DCTELEM *) movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)] movdqa xmm2, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(3,0,rdx,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,rdx,SIZEOF_DCTELEM)] movdqa xmm7, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)] movdqa xmm1, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)] movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rdx,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,[rel PW_F130_F054] ; xmm7=data2L pmaddwd xmm6,[rel PW_F130_F054] ; xmm6=data2H pmaddwd xmm4,[rel PW_F054_MF130] ; xmm4=data6L pmaddwd xmm0,[rel PW_F054_MF130] ; xmm0=data6H paddd xmm7,[rel PD_DESCALE_P1] paddd xmm6,[rel PD_DESCALE_P1] psrad xmm7,DESCALE_P1 psrad xmm6,DESCALE_P1 paddd xmm4,[rel PD_DESCALE_P1] paddd xmm0,[rel 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,[rel PW_MF078_F117] ; xmm7=z3L pmaddwd xmm4,[rel PW_MF078_F117] ; xmm4=z3H pmaddwd xmm6,[rel PW_F117_F078] ; xmm6=z4L pmaddwd xmm0,[rel 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,[rel PW_MF060_MF089] ; xmm7=tmp4L pmaddwd xmm4,[rel PW_MF060_MF089] ; xmm4=tmp4H pmaddwd xmm2,[rel PW_MF089_F060] ; xmm2=tmp7L pmaddwd xmm1,[rel 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,[rel PD_DESCALE_P1] paddd xmm4,[rel PD_DESCALE_P1] psrad xmm7,DESCALE_P1 psrad xmm4,DESCALE_P1 paddd xmm2,[rel PD_DESCALE_P1] paddd xmm1,[rel 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,[rel PW_MF050_MF256] ; xmm4=tmp5L pmaddwd xmm1,[rel PW_MF050_MF256] ; xmm1=tmp5H pmaddwd xmm5,[rel PW_MF256_F050] ; xmm5=tmp6L pmaddwd xmm3,[rel 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,[rel PD_DESCALE_P1] paddd xmm1,[rel PD_DESCALE_P1] psrad xmm4,DESCALE_P1 psrad xmm1,DESCALE_P1 paddd xmm5,[rel PD_DESCALE_P1] paddd xmm3,[rel 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. 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,[rel PW_DESCALE_P2X] paddw xmm5,[rel PW_DESCALE_P2X] psraw xmm7,PASS1_BITS ; xmm7=data0 psraw xmm5,PASS1_BITS ; xmm5=data4 movdqa XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)], xmm7 movdqa XMMWORD [XMMBLOCK(4,0,rdx,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,[rel PW_F130_F054] ; xmm4=data2L pmaddwd xmm2,[rel PW_F130_F054] ; xmm2=data2H pmaddwd xmm1,[rel PW_F054_MF130] ; xmm1=data6L pmaddwd xmm6,[rel PW_F054_MF130] ; xmm6=data6H paddd xmm4,[rel PD_DESCALE_P2] paddd xmm2,[rel PD_DESCALE_P2] psrad xmm4,DESCALE_P2 psrad xmm2,DESCALE_P2 paddd xmm1,[rel PD_DESCALE_P2] paddd xmm6,[rel 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,rdx,SIZEOF_DCTELEM)], xmm4 movdqa XMMWORD [XMMBLOCK(6,0,rdx,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,[rel PW_MF078_F117] ; xmm4=z3L pmaddwd xmm1,[rel PW_MF078_F117] ; xmm1=z3H pmaddwd xmm2,[rel PW_F117_F078] ; xmm2=z4L pmaddwd xmm6,[rel 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,[rel PW_MF060_MF089] ; xmm4=tmp4L pmaddwd xmm1,[rel PW_MF060_MF089] ; xmm1=tmp4H pmaddwd xmm0,[rel PW_MF089_F060] ; xmm0=tmp7L pmaddwd xmm5,[rel 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,[rel PD_DESCALE_P2] paddd xmm1,[rel PD_DESCALE_P2] psrad xmm4,DESCALE_P2 psrad xmm1,DESCALE_P2 paddd xmm0,[rel PD_DESCALE_P2] paddd xmm5,[rel 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,rdx,SIZEOF_DCTELEM)], xmm4 movdqa XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)], xmm0 movdqa xmm1,xmm3 movdqa xmm5,xmm3 punpcklwd xmm1,xmm7 punpckhwd xmm5,xmm7 movdqa xmm3,xmm1 movdqa xmm7,xmm5 pmaddwd xmm1,[rel PW_MF050_MF256] ; xmm1=tmp5L pmaddwd xmm5,[rel PW_MF050_MF256] ; xmm5=tmp5H pmaddwd xmm3,[rel PW_MF256_F050] ; xmm3=tmp6L pmaddwd xmm7,[rel 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,[rel PD_DESCALE_P2] paddd xmm5,[rel PD_DESCALE_P2] psrad xmm1,DESCALE_P2 psrad xmm5,DESCALE_P2 paddd xmm3,[rel PD_DESCALE_P2] paddd xmm7,[rel 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,rdx,SIZEOF_DCTELEM)], xmm1 movdqa XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)], xmm3 uncollect_args mov rsp,rbp ; rsp <- aligned rbp pop rsp ; rsp <- original rbp pop rbp ret ; For some reason, the OS X linker does not honor the request to align the ; segment unless we do this. align 16