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* Ported the ffmpeg fDCT functions (mmx and xmm). * Modified the skal's versions a bit to allow rolling loops. * Activated Skal's fDCTs (unrolled versions) for mmx _and_ xmm (old code was ignoring xmm versions) * Removed the SSE2 versions (they'll be back later) * .data -> .rodata * Applied announced asm CodingStyle to the dct dir (I'll have to add a section with the said CodingStyle)
;/**************************************************************************** ; * ; * XVID MPEG-4 VIDEO CODEC ; * - MMX and XMM forward discrete cosine transform - ; * ; * Copyright(C) 2001 Peter Ross <pross@xvid.org> ; * ; * This program is free software; you can redistribute it and/or modify it ; * under the terms of the GNU General Public License as published by ; * the Free Software Foundation; either version 2 of the License, or ; * (at your option) any later version. ; * ; * This program is distributed in the hope that it will be useful, ; * but WITHOUT ANY WARRANTY; without even the implied warranty of ; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; * GNU General Public License for more details. ; * ; * You should have received a copy of the GNU General Public License ; * along with this program; if not, write to the Free Software ; * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ; * ; * $Id: idct_mmx.asm,v 1.6.2.1 2003-10-27 01:03:06 edgomez Exp $ ; * ; ***************************************************************************/ ; **************************************************************************** ; ; Originally provided by Intel at AP-922 ; http://developer.intel.com/vtune/cbts/strmsimd/922down.htm ; (See more app notes at http://developer.intel.com/vtune/cbts/strmsimd/appnotes.htm) ; but in a limited edition. ; New macro implements a column part for precise iDCT ; The routine precision now satisfies IEEE standard 1180-1990. ; ; Copyright(C) 2000-2001 Peter Gubanov <peter@elecard.net.ru> ; Rounding trick Copyright(C) 2000 Michel Lespinasse <walken@zoy.org> ; ; http://www.elecard.com/peter/idct.html ; http://www.linuxvideo.org/mpeg2dec/ ; ; ***************************************************************************/ ; ; These examples contain code fragments for first stage iDCT 8x8 ; (for rows) and first stage DCT 8x8 (for columns) ; BITS 32 ;============================================================================= ; Macros and other preprocessor constants ;============================================================================= %macro cglobal 1 %ifdef PREFIX global _%1 %define %1 _%1 %else global %1 %endif %endmacro %define BITS_INV_ACC 5 ; 4 or 5 for IEEE %define SHIFT_INV_ROW 16 - BITS_INV_ACC %define SHIFT_INV_COL 1 + BITS_INV_ACC %define RND_INV_ROW 1024 * (6 - BITS_INV_ACC) ; 1 << (SHIFT_INV_ROW-1) %define RND_INV_COL 16 * (BITS_INV_ACC - 3) ; 1 << (SHIFT_INV_COL-1) %define RND_INV_CORR RND_INV_COL - 1 ; correction -1.0 and round %define BITS_FRW_ACC 3 ; 2 or 3 for accuracy %define SHIFT_FRW_COL BITS_FRW_ACC %define SHIFT_FRW_ROW BITS_FRW_ACC + 17 %define RND_FRW_ROW 262144*(BITS_FRW_ACC - 1) ; 1 << (SHIFT_FRW_ROW-1) ;============================================================================= ; Local Data (Read Only) ;============================================================================= SECTION .rodata ;----------------------------------------------------------------------------- ; Various memory constants (trigonometric values or rounding values) ;----------------------------------------------------------------------------- ALIGN 16 one_corr: dw 1, 1, 1, 1 round_inv_row: dd RND_INV_ROW, RND_INV_ROW round_inv_col: dw RND_INV_COL, RND_INV_COL, RND_INV_COL, RND_INV_COL round_inv_corr: dw RND_INV_CORR, RND_INV_CORR, RND_INV_CORR, RND_INV_CORR round_frw_row: dd RND_FRW_ROW, RND_FRW_ROW tg_1_16: dw 13036, 13036, 13036, 13036 ; tg * (2<<16) + 0.5 tg_2_16: dw 27146, 27146, 27146, 27146 ; tg * (2<<16) + 0.5 tg_3_16: dw -21746, -21746, -21746, -21746 ; tg * (2<<16) + 0.5 cos_4_16: dw -19195, -19195, -19195, -19195 ; cos * (2<<16) + 0.5 ocos_4_16: dw 23170, 23170, 23170, 23170 ; cos * (2<<15) + 0.5 otg_3_16: dw 21895, 21895, 21895, 21895 ; tg * (2<<16) + 0.5 %if SHIFT_INV_ROW == 12 ; assume SHIFT_INV_ROW == 12 rounder_0: dd 65536, 65536 rounder_4: dd 0, 0 rounder_1: dd 7195, 7195 rounder_7 dd 1024, 1024 rounder_2: dd 4520, 4520 rounder_6: dd 1024, 1024 rounder_3: dd 2407, 2407 rounder_5: dd 240, 240 %elif SHIFT_INV_ROW == 11 ; assume SHIFT_INV_ROW == 11 rounder_0: dd 65536, 65536 rounder_4: dd 0, 0 rounder_1: dd 3597, 3597 rounder_7: dd 512, 512 rounder_2: dd 2260, 2260 rounder_6: dd 512, 512 rounder_3: dd 1203, 1203 rounder_5: dd 120, 120 %else %error invalid SHIFT_INV_ROW %endif ;----------------------------------------------------------------------------- ; ; The first stage iDCT 8x8 - inverse DCTs of rows ; ;----------------------------------------------------------------------------- ; The 8-point inverse DCT direct algorithm ;----------------------------------------------------------------------------- ; ; static const short w[32] = { ; FIX(cos_4_16), FIX(cos_2_16), FIX(cos_4_16), FIX(cos_6_16), ; FIX(cos_4_16), FIX(cos_6_16), -FIX(cos_4_16), -FIX(cos_2_16), ; FIX(cos_4_16), -FIX(cos_6_16), -FIX(cos_4_16), FIX(cos_2_16), ; FIX(cos_4_16), -FIX(cos_2_16), FIX(cos_4_16), -FIX(cos_6_16), ; FIX(cos_1_16), FIX(cos_3_16), FIX(cos_5_16), FIX(cos_7_16), ; FIX(cos_3_16), -FIX(cos_7_16), -FIX(cos_1_16), -FIX(cos_5_16), ; FIX(cos_5_16), -FIX(cos_1_16), FIX(cos_7_16), FIX(cos_3_16), ; FIX(cos_7_16), -FIX(cos_5_16), FIX(cos_3_16), -FIX(cos_1_16) }; ; ; #define DCT_8_INV_ROW(x, y) ; { ; int a0, a1, a2, a3, b0, b1, b2, b3; ; ; a0 =x[0]*w[0]+x[2]*w[1]+x[4]*w[2]+x[6]*w[3]; ; a1 =x[0]*w[4]+x[2]*w[5]+x[4]*w[6]+x[6]*w[7]; ; a2 = x[0] * w[ 8] + x[2] * w[ 9] + x[4] * w[10] + x[6] * w[11]; ; a3 = x[0] * w[12] + x[2] * w[13] + x[4] * w[14] + x[6] * w[15]; ; b0 = x[1] * w[16] + x[3] * w[17] + x[5] * w[18] + x[7] * w[19]; ; b1 = x[1] * w[20] + x[3] * w[21] + x[5] * w[22] + x[7] * w[23]; ; b2 = x[1] * w[24] + x[3] * w[25] + x[5] * w[26] + x[7] * w[27]; ; b3 = x[1] * w[28] + x[3] * w[29] + x[5] * w[30] + x[7] * w[31]; ; ; y[0] = SHIFT_ROUND ( a0 + b0 ); ; y[1] = SHIFT_ROUND ( a1 + b1 ); ; y[2] = SHIFT_ROUND ( a2 + b2 ); ; y[3] = SHIFT_ROUND ( a3 + b3 ); ; y[4] = SHIFT_ROUND ( a3 - b3 ); ; y[5] = SHIFT_ROUND ( a2 - b2 ); ; y[6] = SHIFT_ROUND ( a1 - b1 ); ; y[7] = SHIFT_ROUND ( a0 - b0 ); ; } ; ;----------------------------------------------------------------------------- ; ; In this implementation the outputs of the iDCT-1D are multiplied ; for rows 0,4 - by cos_4_16, ; for rows 1,7 - by cos_1_16, ; for rows 2,6 - by cos_2_16, ; for rows 3,5 - by cos_3_16 ; and are shifted to the left for better accuracy ; ; For the constants used, ; FIX(float_const) = (short) (float_const * (1<<15) + 0.5) ; ;----------------------------------------------------------------------------- ;----------------------------------------------------------------------------- ; Tables for mmx processors ;----------------------------------------------------------------------------- ; Table for rows 0,4 - constants are multiplied by cos_4_16 tab_i_04_mmx: dw 16384, 16384, 16384, -16384 ; movq-> w06 w04 w02 w00 dw 21407, 8867, 8867, -21407 ; w07 w05 w03 w01 dw 16384, -16384, 16384, 16384 ; w14 w12 w10 w08 dw -8867, 21407, -21407, -8867 ; w15 w13 w11 w09 dw 22725, 12873, 19266, -22725 ; w22 w20 w18 w16 dw 19266, 4520, -4520, -12873 ; w23 w21 w19 w17 dw 12873, 4520, 4520, 19266 ; w30 w28 w26 w24 dw -22725, 19266, -12873, -22725 ; w31 w29 w27 w25 ; Table for rows 1,7 - constants are multiplied by cos_1_16 tab_i_17_mmx: dw 22725, 22725, 22725, -22725 ; movq-> w06 w04 w02 w00 dw 29692, 12299, 12299, -29692 ; w07 w05 w03 w01 dw 22725, -22725, 22725, 22725 ; w14 w12 w10 w08 dw -12299, 29692, -29692, -12299 ; w15 w13 w11 w09 dw 31521, 17855, 26722, -31521 ; w22 w20 w18 w16 dw 26722, 6270, -6270, -17855 ; w23 w21 w19 w17 dw 17855, 6270, 6270, 26722 ; w30 w28 w26 w24 dw -31521, 26722, -17855, -31521 ; w31 w29 w27 w25 ; Table for rows 2,6 - constants are multiplied by cos_2_16 tab_i_26_mmx: dw 21407, 21407, 21407, -21407 ; movq-> w06 w04 w02 w00 dw 27969, 11585, 11585, -27969 ; w07 w05 w03 w01 dw 21407, -21407, 21407, 21407 ; w14 w12 w10 w08 dw -11585, 27969, -27969, -11585 ; w15 w13 w11 w09 dw 29692, 16819, 25172, -29692 ; w22 w20 w18 w16 dw 25172, 5906, -5906, -16819 ; w23 w21 w19 w17 dw 16819, 5906, 5906, 25172 ; w30 w28 w26 w24 dw -29692, 25172, -16819, -29692 ; w31 w29 w27 w25 ; Table for rows 3,5 - constants are multiplied by cos_3_16 tab_i_35_mmx: dw 19266, 19266, 19266, -19266 ; movq-> w06 w04 w02 w00 dw 25172, 10426, 10426, -25172 ; w07 w05 w03 w01 dw 19266, -19266, 19266, 19266 ; w14 w12 w10 w08 dw -10426, 25172, -25172, -10426 ; w15 w13 w11 w09 dw 26722, 15137, 22654, -26722 ; w22 w20 w18 w16 dw 22654, 5315, -5315, -15137 ; w23 w21 w19 w17 dw 15137, 5315, 5315, 22654 ; w30 w28 w26 w24 dw -26722, 22654, -15137, -26722 ; w31 w29 w27 w25 ;----------------------------------------------------------------------------- ; Tables for xmm processors ;----------------------------------------------------------------------------- ; %3 for rows 0,4 - constants are multiplied by cos_4_16 tab_i_04_xmm: dw 16384, 21407, 16384, 8867 ; movq-> w05 w04 w01 w00 dw 16384, 8867, -16384, -21407 ; w07 w06 w03 w02 dw 16384, -8867, 16384, -21407 ; w13 w12 w09 w08 dw -16384, 21407, 16384, -8867 ; w15 w14 w11 w10 dw 22725, 19266, 19266, -4520 ; w21 w20 w17 w16 dw 12873, 4520, -22725, -12873 ; w23 w22 w19 w18 dw 12873, -22725, 4520, -12873 ; w29 w28 w25 w24 dw 4520, 19266, 19266, -22725 ; w31 w30 w27 w26 ; %3 for rows 1,7 - constants are multiplied by cos_1_16 tab_i_17_xmm: dw 22725, 29692, 22725, 12299 ; movq-> w05 w04 w01 w00 dw 22725, 12299, -22725, -29692 ; w07 w06 w03 w02 dw 22725, -12299, 22725, -29692 ; w13 w12 w09 w08 dw -22725, 29692, 22725, -12299 ; w15 w14 w11 w10 dw 31521, 26722, 26722, -6270 ; w21 w20 w17 w16 dw 17855, 6270, -31521, -17855 ; w23 w22 w19 w18 dw 17855, -31521, 6270, -17855 ; w29 w28 w25 w24 dw 6270, 26722, 26722, -31521 ; w31 w30 w27 w26 ; %3 for rows 2,6 - constants are multiplied by cos_2_16 tab_i_26_xmm: dw 21407, 27969, 21407, 11585 ; movq-> w05 w04 w01 w00 dw 21407, 11585, -21407, -27969 ; w07 w06 w03 w02 dw 21407, -11585, 21407, -27969 ; w13 w12 w09 w08 dw -21407, 27969, 21407, -11585 ; w15 w14 w11 w10 dw 29692, 25172, 25172, -5906 ; w21 w20 w17 w16 dw 16819, 5906, -29692, -16819 ; w23 w22 w19 w18 dw 16819, -29692, 5906, -16819 ; w29 w28 w25 w24 dw 5906, 25172, 25172, -29692 ; w31 w30 w27 w26 ; %3 for rows 3,5 - constants are multiplied by cos_3_16 tab_i_35_xmm: dw 19266, 25172, 19266, 10426 ; movq-> w05 w04 w01 w00 dw 19266, 10426, -19266, -25172 ; w07 w06 w03 w02 dw 19266, -10426, 19266, -25172 ; w13 w12 w09 w08 dw -19266, 25172, 19266, -10426 ; w15 w14 w11 w10 dw 26722, 22654, 22654, -5315 ; w21 w20 w17 w16 dw 15137, 5315, -26722, -15137 ; w23 w22 w19 w18 dw 15137, -26722, 5315, -15137 ; w29 w28 w25 w24 dw 5315, 22654, 22654, -26722 ; w31 w30 w27 w26 ;============================================================================= ; Helper macros for the code ;============================================================================= ;----------------------------------------------------------------------------- ; DCT_8_INV_ROW_MMX INP, OUT, TABLE, ROUNDER ;----------------------------------------------------------------------------- %macro DCT_8_INV_ROW_MMX 4 movq mm0, [%1] ; 0 ; x3 x2 x1 x0 movq mm1, [%1+8] ; 1 ; x7 x6 x5 x4 movq mm2, mm0 ; 2 ; x3 x2 x1 x0 movq mm3, [%3] ; 3 ; w06 w04 w02 w00 punpcklwd mm0, mm1 ; x5 x1 x4 x0 movq mm5, mm0 ; 5 ; x5 x1 x4 x0 punpckldq mm0, mm0 ; x4 x0 x4 x0 movq mm4, [%3+8] ; 4 ; w07 w05 w03 w01 punpckhwd mm2, mm1 ; 1 ; x7 x3 x6 x2 pmaddwd mm3, mm0 ; x4*w06+x0*w04 x4*w02+x0*w00 movq mm6, mm2 ; 6 ; x7 x3 x6 x2 movq mm1, [%3+32] ; 1 ; w22 w20 w18 w16 punpckldq mm2, mm2 ; x6 x2 x6 x2 pmaddwd mm4, mm2 ; x6*w07+x2*w05 x6*w03+x2*w01 punpckhdq mm5, mm5 ; x5 x1 x5 x1 pmaddwd mm0, [%3+16] ; x4*w14+x0*w12 x4*w10+x0*w08 punpckhdq mm6, mm6 ; x7 x3 x7 x3 movq mm7, [%3+40] ; 7 ; w23 w21 w19 w17 pmaddwd mm1, mm5 ; x5*w22+x1*w20 x5*w18+x1*w16 paddd mm3, [%4] ; +%4 pmaddwd mm7, mm6 ; x7*w23+x3*w21 x7*w19+x3*w17 pmaddwd mm2, [%3+24] ; x6*w15+x2*w13 x6*w11+x2*w09 paddd mm3, mm4 ; 4 ; a1=sum(even1) a0=sum(even0) pmaddwd mm5, [%3+48] ; x5*w30+x1*w28 x5*w26+x1*w24 movq mm4, mm3 ; 4 ; a1 a0 pmaddwd mm6, [%3+56] ; x7*w31+x3*w29 x7*w27+x3*w25 paddd mm1, mm7 ; 7 ; b1=sum(odd1) b0=sum(odd0) paddd mm0, [%4] ; +%4 psubd mm3, mm1 ; a1-b1 a0-b0 psrad mm3, SHIFT_INV_ROW ; y6=a1-b1 y7=a0-b0 paddd mm1, mm4 ; 4 ; a1+b1 a0+b0 paddd mm0, mm2 ; 2 ; a3=sum(even3) a2=sum(even2) psrad mm1, SHIFT_INV_ROW ; y1=a1+b1 y0=a0+b0 paddd mm5, mm6 ; 6 ; b3=sum(odd3) b2=sum(odd2) movq mm4, mm0 ; 4 ; a3 a2 paddd mm0, mm5 ; a3+b3 a2+b2 psubd mm4, mm5 ; 5 ; a3-b3 a2-b2 psrad mm0, SHIFT_INV_ROW ; y3=a3+b3 y2=a2+b2 psrad mm4, SHIFT_INV_ROW ; y4=a3-b3 y5=a2-b2 packssdw mm1, mm0 ; 0 ; y3 y2 y1 y0 packssdw mm4, mm3 ; 3 ; y6 y7 y4 y5 movq mm7, mm4 ; 7 ; y6 y7 y4 y5 psrld mm4, 16 ; 0 y6 0 y4 pslld mm7, 16 ; y7 0 y5 0 movq [%2], mm1 ; 1 ; save y3 y2 y1 y0 por mm7, mm4 ; 4 ; y7 y6 y5 y4 movq [%2+8], mm7 ; 7 ; save y7 y6 y5 y4 %endmacro ;----------------------------------------------------------------------------- ; DCT_8_INV_ROW_XMM INP, OUT, TABLE, ROUNDER ;----------------------------------------------------------------------------- %macro DCT_8_INV_ROW_XMM 4 movq mm0, [%1] ; 0 ; x3 x2 x1 x0 movq mm1, [%1+8] ; 1 ; x7 x6 x5 x4 movq mm2, mm0 ; 2 ; x3 x2 x1 x0 movq mm3, [%3] ; 3 ; w05 w04 w01 w00 pshufw mm0, mm0, 10001000b ; x2 x0 x2 x0 movq mm4, [%3+8] ; 4 ; w07 w06 w03 w02 movq mm5, mm1 ; 5 ; x7 x6 x5 x4 pmaddwd mm3, mm0 ; x2*w05+x0*w04 x2*w01+x0*w00 movq mm6, [%3+32] ; 6 ; w21 w20 w17 w16 pshufw mm1, mm1, 10001000b ; x6 x4 x6 x4 pmaddwd mm4, mm1 ; x6*w07+x4*w06 x6*w03+x4*w02 movq mm7, [%3+40] ; 7 ; w23 w22 w19 w18 pshufw mm2, mm2, 11011101b ; x3 x1 x3 x1 pmaddwd mm6, mm2 ; x3*w21+x1*w20 x3*w17+x1*w16 pshufw mm5, mm5, 11011101b ; x7 x5 x7 x5 pmaddwd mm7, mm5 ; x7*w23+x5*w22 x7*w19+x5*w18 paddd mm3, [%4] ; +%4 pmaddwd mm0, [%3+16] ; x2*w13+x0*w12 x2*w09+x0*w08 paddd mm3, mm4 ; 4 ; a1=sum(even1) a0=sum(even0) pmaddwd mm1, [%3+24] ; x6*w15+x4*w14 x6*w11+x4*w10 movq mm4, mm3 ; 4 ; a1 a0 pmaddwd mm2, [%3+48] ; x3*w29+x1*w28 x3*w25+x1*w24 paddd mm6, mm7 ; 7 ; b1=sum(odd1) b0=sum(odd0) pmaddwd mm5, [%3+56] ; x7*w31+x5*w30 x7*w27+x5*w26 paddd mm3, mm6 ; a1+b1 a0+b0 paddd mm0, [%4] ; +%4 psrad mm3, SHIFT_INV_ROW ; y1=a1+b1 y0=a0+b0 paddd mm0, mm1 ; 1 ; a3=sum(even3) a2=sum(even2) psubd mm4, mm6 ; 6 ; a1-b1 a0-b0 movq mm7, mm0 ; 7 ; a3 a2 paddd mm2, mm5 ; 5 ; b3=sum(odd3) b2=sum(odd2) paddd mm0, mm2 ; a3+b3 a2+b2 psrad mm4, SHIFT_INV_ROW ; y6=a1-b1 y7=a0-b0 psubd mm7, mm2 ; 2 ; a3-b3 a2-b2 psrad mm0, SHIFT_INV_ROW ; y3=a3+b3 y2=a2+b2 psrad mm7, SHIFT_INV_ROW ; y4=a3-b3 y5=a2-b2 packssdw mm3, mm0 ; 0 ; y3 y2 y1 y0 packssdw mm7, mm4 ; 4 ; y6 y7 y4 y5 movq [%2], mm3 ; 3 ; save y3 y2 y1 y0 pshufw mm7, mm7, 10110001b ; y7 y6 y5 y4 movq [%2+8], mm7 ; 7 ; save y7 y6 y5 y4 %endmacro ;----------------------------------------------------------------------------- ; ; The first stage DCT 8x8 - forward DCTs of columns ; ; The %2puts are multiplied ; for rows 0,4 - on cos_4_16, ; for rows 1,7 - on cos_1_16, ; for rows 2,6 - on cos_2_16, ; for rows 3,5 - on cos_3_16 ; and are shifted to the left for rise of accuracy ; ;----------------------------------------------------------------------------- ; ; The 8-point scaled forward DCT algorithm (26a8m) ; ;----------------------------------------------------------------------------- ; ; #define DCT_8_FRW_COL(x, y) ;{ ; short t0, t1, t2, t3, t4, t5, t6, t7; ; short tp03, tm03, tp12, tm12, tp65, tm65; ; short tp465, tm465, tp765, tm765; ; ; t0 = LEFT_SHIFT ( x[0] + x[7] ); ; t1 = LEFT_SHIFT ( x[1] + x[6] ); ; t2 = LEFT_SHIFT ( x[2] + x[5] ); ; t3 = LEFT_SHIFT ( x[3] + x[4] ); ; t4 = LEFT_SHIFT ( x[3] - x[4] ); ; t5 = LEFT_SHIFT ( x[2] - x[5] ); ; t6 = LEFT_SHIFT ( x[1] - x[6] ); ; t7 = LEFT_SHIFT ( x[0] - x[7] ); ; ; tp03 = t0 + t3; ; tm03 = t0 - t3; ; tp12 = t1 + t2; ; tm12 = t1 - t2; ; ; y[0] = tp03 + tp12; ; y[4] = tp03 - tp12; ; ; y[2] = tm03 + tm12 * tg_2_16; ; y[6] = tm03 * tg_2_16 - tm12; ; ; tp65 =(t6 +t5 )*cos_4_16; ; tm65 =(t6 -t5 )*cos_4_16; ; ; tp765 = t7 + tp65; ; tm765 = t7 - tp65; ; tp465 = t4 + tm65; ; tm465 = t4 - tm65; ; ; y[1] = tp765 + tp465 * tg_1_16; ; y[7] = tp765 * tg_1_16 - tp465; ; y[5] = tm765 * tg_3_16 + tm465; ; y[3] = tm765 - tm465 * tg_3_16; ;} ; ;----------------------------------------------------------------------------- ;----------------------------------------------------------------------------- ; DCT_8_INV_COL_4 INP,OUT ;----------------------------------------------------------------------------- %macro DCT_8_INV_COL 2 movq mm0, [tg_3_16] movq mm3, [%1+16*3] movq mm1, mm0 ; tg_3_16 movq mm5, [%1+16*5] pmulhw mm0, mm3 ; x3*(tg_3_16-1) movq mm4, [tg_1_16] pmulhw mm1, mm5 ; x5*(tg_3_16-1) movq mm7, [%1+16*7] movq mm2, mm4 ; tg_1_16 movq mm6, [%1+16*1] pmulhw mm4, mm7 ; x7*tg_1_16 paddsw mm0, mm3 ; x3*tg_3_16 pmulhw mm2, mm6 ; x1*tg_1_16 paddsw mm1, mm3 ; x3+x5*(tg_3_16-1) psubsw mm0, mm5 ; x3*tg_3_16-x5 = tm35 movq mm3, [ocos_4_16] paddsw mm1, mm5 ; x3+x5*tg_3_16 = tp35 paddsw mm4, mm6 ; x1+tg_1_16*x7 = tp17 psubsw mm2, mm7 ; x1*tg_1_16-x7 = tm17 movq mm5, mm4 ; tp17 movq mm6, mm2 ; tm17 paddsw mm5, mm1 ; tp17+tp35 = b0 psubsw mm6, mm0 ; tm17-tm35 = b3 psubsw mm4, mm1 ; tp17-tp35 = t1 paddsw mm2, mm0 ; tm17+tm35 = t2 movq mm7, [tg_2_16] movq mm1, mm4 ; t1 ; movq [SCRATCH+0], mm5 ; save b0 movq [%2+3*16], mm5 ; save b0 paddsw mm1, mm2 ; t1+t2 ; movq [SCRATCH+8], mm6 ; save b3 movq [%2+5*16], mm6 ; save b3 psubsw mm4, mm2 ; t1-t2 movq mm5, [%1+2*16] movq mm0, mm7 ; tg_2_16 movq mm6, [%1+6*16] pmulhw mm0, mm5 ; x2*tg_2_16 pmulhw mm7, mm6 ; x6*tg_2_16 ; slot pmulhw mm1, mm3 ; ocos_4_16*(t1+t2) = b1/2 ; slot movq mm2, [%1+0*16] pmulhw mm4, mm3 ; ocos_4_16*(t1-t2) = b2/2 psubsw mm0, mm6 ; t2*tg_2_16-x6 = tm26 movq mm3, mm2 ; x0 movq mm6, [%1+4*16] paddsw mm7, mm5 ; x2+x6*tg_2_16 = tp26 paddsw mm2, mm6 ; x0+x4 = tp04 psubsw mm3, mm6 ; x0-x4 = tm04 movq mm5, mm2 ; tp04 movq mm6, mm3 ; tm04 psubsw mm2, mm7 ; tp04-tp26 = a3 paddsw mm3, mm0 ; tm04+tm26 = a1 paddsw mm1, mm1 ; b1 paddsw mm4, mm4 ; b2 paddsw mm5, mm7 ; tp04+tp26 = a0 psubsw mm6, mm0 ; tm04-tm26 = a2 movq mm7, mm3 ; a1 movq mm0, mm6 ; a2 paddsw mm3, mm1 ; a1+b1 paddsw mm6, mm4 ; a2+b2 psraw mm3, SHIFT_INV_COL ; dst1 psubsw mm7, mm1 ; a1-b1 psraw mm6, SHIFT_INV_COL ; dst2 psubsw mm0, mm4 ; a2-b2 ; movq mm1, [SCRATCH+0] ; load b0 movq mm1, [%2+3*16] ; load b0 psraw mm7, SHIFT_INV_COL ; dst6 movq mm4, mm5 ; a0 psraw mm0, SHIFT_INV_COL ; dst5 movq [%2+1*16], mm3 paddsw mm5, mm1 ; a0+b0 movq [%2+2*16], mm6 psubsw mm4, mm1 ; a0-b0 ; movq mm3, [SCRATCH+8] ; load b3 movq mm3, [%2+5*16] ; load b3 psraw mm5, SHIFT_INV_COL ; dst0 movq mm6, mm2 ; a3 psraw mm4, SHIFT_INV_COL ; dst7 movq [%2+5*16], mm0 paddsw mm2, mm3 ; a3+b3 movq [%2+6*16], mm7 psubsw mm6, mm3 ; a3-b3 movq [%2+0*16], mm5 psraw mm2, SHIFT_INV_COL ; dst3 movq [%2+7*16], mm4 psraw mm6, SHIFT_INV_COL ; dst4 movq [%2+3*16], mm2 movq [%2+4*16], mm6 %endmacro ;============================================================================= ; Code ;============================================================================= SECTION .text ;----------------------------------------------------------------------------- ; void idct_mmx(uint16_t block[64]); ;----------------------------------------------------------------------------- ALIGN 16 cglobal idct_mmx idct_mmx: mov eax, dword [esp + 4] ;; Process each row DCT_8_INV_ROW_MMX eax+0*16, eax+0*16, tab_i_04_mmx, rounder_0 DCT_8_INV_ROW_MMX eax+1*16, eax+1*16, tab_i_17_mmx, rounder_1 DCT_8_INV_ROW_MMX eax+2*16, eax+2*16, tab_i_26_mmx, rounder_2 DCT_8_INV_ROW_MMX eax+3*16, eax+3*16, tab_i_35_mmx, rounder_3 DCT_8_INV_ROW_MMX eax+4*16, eax+4*16, tab_i_04_mmx, rounder_4 DCT_8_INV_ROW_MMX eax+5*16, eax+5*16, tab_i_35_mmx, rounder_5 DCT_8_INV_ROW_MMX eax+6*16, eax+6*16, tab_i_26_mmx, rounder_6 DCT_8_INV_ROW_MMX eax+7*16, eax+7*16, tab_i_17_mmx, rounder_7 ;; Process the columns (4 at a time) DCT_8_INV_COL eax+0, eax+0 DCT_8_INV_COL eax+8, eax+8 ret ;----------------------------------------------------------------------------- ; void idct_xmm(uint16_t block[64]); ;----------------------------------------------------------------------------- ALIGN 16 cglobal idct_xmm idct_xmm: mov eax, dword [esp + 4] ;; Process each row DCT_8_INV_ROW_XMM eax+0*16, eax+0*16, tab_i_04_xmm, rounder_0 DCT_8_INV_ROW_XMM eax+1*16, eax+1*16, tab_i_17_xmm, rounder_1 DCT_8_INV_ROW_XMM eax+2*16, eax+2*16, tab_i_26_xmm, rounder_2 DCT_8_INV_ROW_XMM eax+3*16, eax+3*16, tab_i_35_xmm, rounder_3 DCT_8_INV_ROW_XMM eax+4*16, eax+4*16, tab_i_04_xmm, rounder_4 DCT_8_INV_ROW_XMM eax+5*16, eax+5*16, tab_i_35_xmm, rounder_5 DCT_8_INV_ROW_XMM eax+6*16, eax+6*16, tab_i_26_xmm, rounder_6 DCT_8_INV_ROW_XMM eax+7*16, eax+7*16, tab_i_17_xmm, rounder_7 ;; Process the columns (4 at a time) DCT_8_INV_COL eax+0, eax+0 DCT_8_INV_COL eax+8, eax+8 ret
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