| /* |
| * XVID MPEG-4 VIDEO CODEC |
| * - MMX and XMM forward discrete cosine transform - |
| * |
| * Copyright(C) 2001 Peter Ross <pross@xvid.org> |
| * |
| * 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) |
| * |
| * conversion to gcc syntax by Michael Niedermayer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public License |
| * along with FFmpeg; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <inttypes.h> |
| #include "libavcodec/avcodec.h" |
| |
| //============================================================================= |
| // Macros and other preprocessor constants |
| //============================================================================= |
| |
| #define BITS_INV_ACC 5 // 4 or 5 for IEEE |
| #define SHIFT_INV_ROW (16 - BITS_INV_ACC) //11 |
| #define SHIFT_INV_COL (1 + BITS_INV_ACC) //6 |
| #define RND_INV_ROW (1024 * (6 - BITS_INV_ACC)) |
| #define RND_INV_COL (16 * (BITS_INV_ACC - 3)) |
| #define RND_INV_CORR (RND_INV_COL - 1) |
| |
| #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)) |
| |
| |
| //----------------------------------------------------------------------------- |
| // Various memory constants (trigonometric values or rounding values) |
| //----------------------------------------------------------------------------- |
| |
| |
| DECLARE_ALIGNED(8, static const int16_t, tg_1_16[4*4]) = { |
| 13036,13036,13036,13036, // tg * (2<<16) + 0.5 |
| 27146,27146,27146,27146, // tg * (2<<16) + 0.5 |
| -21746,-21746,-21746,-21746, // tg * (2<<16) + 0.5 |
| 23170,23170,23170,23170}; // cos * (2<<15) + 0.5 |
| |
| DECLARE_ALIGNED(8, static const int32_t, rounder_0[2*8]) = { |
| 65536,65536, |
| 3597,3597, |
| 2260,2260, |
| 1203,1203, |
| 0,0, |
| 120,120, |
| 512,512, |
| 512,512}; |
| |
| //----------------------------------------------------------------------------- |
| // |
| // 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 |
| DECLARE_ALIGNED(8, static const int16_t, tab_i_04_mmx[32*4]) = { |
| 16384,16384,16384,-16384, // movq-> w06 w04 w02 w00 |
| 21407,8867,8867,-21407, // w07 w05 w03 w01 |
| 16384,-16384,16384,16384, // w14 w12 w10 w08 |
| -8867,21407,-21407,-8867, // w15 w13 w11 w09 |
| 22725,12873,19266,-22725, // w22 w20 w18 w16 |
| 19266,4520,-4520,-12873, // w23 w21 w19 w17 |
| 12873,4520,4520,19266, // w30 w28 w26 w24 |
| -22725,19266,-12873,-22725, // w31 w29 w27 w25 |
| // Table for rows 1,7 - constants are multiplied by cos_1_16 |
| 22725,22725,22725,-22725, // movq-> w06 w04 w02 w00 |
| 29692,12299,12299,-29692, // w07 w05 w03 w01 |
| 22725,-22725,22725,22725, // w14 w12 w10 w08 |
| -12299,29692,-29692,-12299, // w15 w13 w11 w09 |
| 31521,17855,26722,-31521, // w22 w20 w18 w16 |
| 26722,6270,-6270,-17855, // w23 w21 w19 w17 |
| 17855,6270,6270,26722, // w30 w28 w26 w24 |
| -31521,26722,-17855,-31521, // w31 w29 w27 w25 |
| // Table for rows 2,6 - constants are multiplied by cos_2_16 |
| 21407,21407,21407,-21407, // movq-> w06 w04 w02 w00 |
| 27969,11585,11585,-27969, // w07 w05 w03 w01 |
| 21407,-21407,21407,21407, // w14 w12 w10 w08 |
| -11585,27969,-27969,-11585, // w15 w13 w11 w09 |
| 29692,16819,25172,-29692, // w22 w20 w18 w16 |
| 25172,5906,-5906,-16819, // w23 w21 w19 w17 |
| 16819,5906,5906,25172, // w30 w28 w26 w24 |
| -29692,25172,-16819,-29692, // w31 w29 w27 w25 |
| // Table for rows 3,5 - constants are multiplied by cos_3_16 |
| 19266,19266,19266,-19266, // movq-> w06 w04 w02 w00 |
| 25172,10426,10426,-25172, // w07 w05 w03 w01 |
| 19266,-19266,19266,19266, // w14 w12 w10 w08 |
| -10426,25172,-25172,-10426, // w15 w13 w11 w09 |
| 26722,15137,22654,-26722, // w22 w20 w18 w16 |
| 22654,5315,-5315,-15137, // w23 w21 w19 w17 |
| 15137,5315,5315,22654, // w30 w28 w26 w24 |
| -26722,22654,-15137,-26722, // w31 w29 w27 w25 |
| }; |
| //----------------------------------------------------------------------------- |
| // Tables for xmm processors |
| //----------------------------------------------------------------------------- |
| |
| // %3 for rows 0,4 - constants are multiplied by cos_4_16 |
| DECLARE_ALIGNED(8, static const int16_t, tab_i_04_xmm[32*4]) = { |
| 16384,21407,16384,8867, // movq-> w05 w04 w01 w00 |
| 16384,8867,-16384,-21407, // w07 w06 w03 w02 |
| 16384,-8867,16384,-21407, // w13 w12 w09 w08 |
| -16384,21407,16384,-8867, // w15 w14 w11 w10 |
| 22725,19266,19266,-4520, // w21 w20 w17 w16 |
| 12873,4520,-22725,-12873, // w23 w22 w19 w18 |
| 12873,-22725,4520,-12873, // w29 w28 w25 w24 |
| 4520,19266,19266,-22725, // w31 w30 w27 w26 |
| // %3 for rows 1,7 - constants are multiplied by cos_1_16 |
| 22725,29692,22725,12299, // movq-> w05 w04 w01 w00 |
| 22725,12299,-22725,-29692, // w07 w06 w03 w02 |
| 22725,-12299,22725,-29692, // w13 w12 w09 w08 |
| -22725,29692,22725,-12299, // w15 w14 w11 w10 |
| 31521,26722,26722,-6270, // w21 w20 w17 w16 |
| 17855,6270,-31521,-17855, // w23 w22 w19 w18 |
| 17855,-31521,6270,-17855, // w29 w28 w25 w24 |
| 6270,26722,26722,-31521, // w31 w30 w27 w26 |
| // %3 for rows 2,6 - constants are multiplied by cos_2_16 |
| 21407,27969,21407,11585, // movq-> w05 w04 w01 w00 |
| 21407,11585,-21407,-27969, // w07 w06 w03 w02 |
| 21407,-11585,21407,-27969, // w13 w12 w09 w08 |
| -21407,27969,21407,-11585, // w15 w14 w11 w10 |
| 29692,25172,25172,-5906, // w21 w20 w17 w16 |
| 16819,5906,-29692,-16819, // w23 w22 w19 w18 |
| 16819,-29692,5906,-16819, // w29 w28 w25 w24 |
| 5906,25172,25172,-29692, // w31 w30 w27 w26 |
| // %3 for rows 3,5 - constants are multiplied by cos_3_16 |
| 19266,25172,19266,10426, // movq-> w05 w04 w01 w00 |
| 19266,10426,-19266,-25172, // w07 w06 w03 w02 |
| 19266,-10426,19266,-25172, // w13 w12 w09 w08 |
| -19266,25172,19266,-10426, // w15 w14 w11 w10 |
| 26722,22654,22654,-5315, // w21 w20 w17 w16 |
| 15137,5315,-26722,-15137, // w23 w22 w19 w18 |
| 15137,-26722,5315,-15137, // w29 w28 w25 w24 |
| 5315,22654,22654,-26722, // w31 w30 w27 w26 |
| }; |
| //============================================================================= |
| // Helper macros for the code |
| //============================================================================= |
| |
| //----------------------------------------------------------------------------- |
| // DCT_8_INV_ROW_MMX( INP, OUT, TABLE, ROUNDER |
| //----------------------------------------------------------------------------- |
| |
| #define DCT_8_INV_ROW_MMX(A1,A2,A3,A4)\ |
| "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\ |
| "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\ |
| "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\ |
| "movq " #A3 ",%%mm3 \n\t"/* 3 ; w06 w04 w02 w00*/\ |
| "punpcklwd %%mm1,%%mm0 \n\t"/* x5 x1 x4 x0*/\ |
| "movq %%mm0,%%mm5 \n\t"/* 5 ; x5 x1 x4 x0*/\ |
| "punpckldq %%mm0,%%mm0 \n\t"/* x4 x0 x4 x0*/\ |
| "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w05 w03 w01*/\ |
| "punpckhwd %%mm1,%%mm2 \n\t"/* 1 ; x7 x3 x6 x2*/\ |
| "pmaddwd %%mm0,%%mm3 \n\t"/* x4*w06+x0*w04 x4*w02+x0*w00*/\ |
| "movq %%mm2,%%mm6 \n\t"/* 6 ; x7 x3 x6 x2*/\ |
| "movq 32+" #A3 ",%%mm1 \n\t"/* 1 ; w22 w20 w18 w16*/\ |
| "punpckldq %%mm2,%%mm2 \n\t"/* x6 x2 x6 x2*/\ |
| "pmaddwd %%mm2,%%mm4 \n\t"/* x6*w07+x2*w05 x6*w03+x2*w01*/\ |
| "punpckhdq %%mm5,%%mm5 \n\t"/* x5 x1 x5 x1*/\ |
| "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x4*w14+x0*w12 x4*w10+x0*w08*/\ |
| "punpckhdq %%mm6,%%mm6 \n\t"/* x7 x3 x7 x3*/\ |
| "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w21 w19 w17*/\ |
| "pmaddwd %%mm5,%%mm1 \n\t"/* x5*w22+x1*w20 x5*w18+x1*w16*/\ |
| "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\ |
| "pmaddwd %%mm6,%%mm7 \n\t"/* x7*w23+x3*w21 x7*w19+x3*w17*/\ |
| "pmaddwd 24+" #A3 ",%%mm2 \n\t"/* x6*w15+x2*w13 x6*w11+x2*w09*/\ |
| "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\ |
| "pmaddwd 48+" #A3 ",%%mm5 \n\t"/* x5*w30+x1*w28 x5*w26+x1*w24*/\ |
| "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\ |
| "pmaddwd 56+" #A3 ",%%mm6 \n\t"/* x7*w31+x3*w29 x7*w27+x3*w25*/\ |
| "paddd %%mm7,%%mm1 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\ |
| "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\ |
| "psubd %%mm1,%%mm3 \n\t"/* a1-b1 a0-b0*/\ |
| "psrad $11,%%mm3 \n\t"/* y6=a1-b1 y7=a0-b0*/\ |
| "paddd %%mm4,%%mm1 \n\t"/* 4 ; a1+b1 a0+b0*/\ |
| "paddd %%mm2,%%mm0 \n\t"/* 2 ; a3=sum(even3) a2=sum(even2)*/\ |
| "psrad $11,%%mm1 \n\t"/* y1=a1+b1 y0=a0+b0*/\ |
| "paddd %%mm6,%%mm5 \n\t"/* 6 ; b3=sum(odd3) b2=sum(odd2)*/\ |
| "movq %%mm0,%%mm4 \n\t"/* 4 ; a3 a2*/\ |
| "paddd %%mm5,%%mm0 \n\t"/* a3+b3 a2+b2*/\ |
| "psubd %%mm5,%%mm4 \n\t"/* 5 ; a3-b3 a2-b2*/\ |
| "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\ |
| "psrad $11,%%mm4 \n\t"/* y4=a3-b3 y5=a2-b2*/\ |
| "packssdw %%mm0,%%mm1 \n\t"/* 0 ; y3 y2 y1 y0*/\ |
| "packssdw %%mm3,%%mm4 \n\t"/* 3 ; y6 y7 y4 y5*/\ |
| "movq %%mm4,%%mm7 \n\t"/* 7 ; y6 y7 y4 y5*/\ |
| "psrld $16,%%mm4 \n\t"/* 0 y6 0 y4*/\ |
| "pslld $16,%%mm7 \n\t"/* y7 0 y5 0*/\ |
| "movq %%mm1," #A2 " \n\t"/* 1 ; save y3 y2 y1 y0*/\ |
| "por %%mm4,%%mm7 \n\t"/* 4 ; y7 y6 y5 y4*/\ |
| "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\ |
| |
| |
| //----------------------------------------------------------------------------- |
| // DCT_8_INV_ROW_XMM( INP, OUT, TABLE, ROUNDER |
| //----------------------------------------------------------------------------- |
| |
| #define DCT_8_INV_ROW_XMM(A1,A2,A3,A4)\ |
| "movq " #A1 ",%%mm0 \n\t"/* 0 ; x3 x2 x1 x0*/\ |
| "movq 8+" #A1 ",%%mm1 \n\t"/* 1 ; x7 x6 x5 x4*/\ |
| "movq %%mm0,%%mm2 \n\t"/* 2 ; x3 x2 x1 x0*/\ |
| "movq " #A3 ",%%mm3 \n\t"/* 3 ; w05 w04 w01 w00*/\ |
| "pshufw $0x88,%%mm0,%%mm0 \n\t"/* x2 x0 x2 x0*/\ |
| "movq 8+" #A3 ",%%mm4 \n\t"/* 4 ; w07 w06 w03 w02*/\ |
| "movq %%mm1,%%mm5 \n\t"/* 5 ; x7 x6 x5 x4*/\ |
| "pmaddwd %%mm0,%%mm3 \n\t"/* x2*w05+x0*w04 x2*w01+x0*w00*/\ |
| "movq 32+" #A3 ",%%mm6 \n\t"/* 6 ; w21 w20 w17 w16*/\ |
| "pshufw $0x88,%%mm1,%%mm1 \n\t"/* x6 x4 x6 x4*/\ |
| "pmaddwd %%mm1,%%mm4 \n\t"/* x6*w07+x4*w06 x6*w03+x4*w02*/\ |
| "movq 40+" #A3 ",%%mm7 \n\t"/* 7 ; w23 w22 w19 w18*/\ |
| "pshufw $0xdd,%%mm2,%%mm2 \n\t"/* x3 x1 x3 x1*/\ |
| "pmaddwd %%mm2,%%mm6 \n\t"/* x3*w21+x1*w20 x3*w17+x1*w16*/\ |
| "pshufw $0xdd,%%mm5,%%mm5 \n\t"/* x7 x5 x7 x5*/\ |
| "pmaddwd %%mm5,%%mm7 \n\t"/* x7*w23+x5*w22 x7*w19+x5*w18*/\ |
| "paddd " #A4 ",%%mm3 \n\t"/* +%4*/\ |
| "pmaddwd 16+" #A3 ",%%mm0 \n\t"/* x2*w13+x0*w12 x2*w09+x0*w08*/\ |
| "paddd %%mm4,%%mm3 \n\t"/* 4 ; a1=sum(even1) a0=sum(even0)*/\ |
| "pmaddwd 24+" #A3 ",%%mm1 \n\t"/* x6*w15+x4*w14 x6*w11+x4*w10*/\ |
| "movq %%mm3,%%mm4 \n\t"/* 4 ; a1 a0*/\ |
| "pmaddwd 48+" #A3 ",%%mm2 \n\t"/* x3*w29+x1*w28 x3*w25+x1*w24*/\ |
| "paddd %%mm7,%%mm6 \n\t"/* 7 ; b1=sum(odd1) b0=sum(odd0)*/\ |
| "pmaddwd 56+" #A3 ",%%mm5 \n\t"/* x7*w31+x5*w30 x7*w27+x5*w26*/\ |
| "paddd %%mm6,%%mm3 \n\t"/* a1+b1 a0+b0*/\ |
| "paddd " #A4 ",%%mm0 \n\t"/* +%4*/\ |
| "psrad $11,%%mm3 \n\t"/* y1=a1+b1 y0=a0+b0*/\ |
| "paddd %%mm1,%%mm0 \n\t"/* 1 ; a3=sum(even3) a2=sum(even2)*/\ |
| "psubd %%mm6,%%mm4 \n\t"/* 6 ; a1-b1 a0-b0*/\ |
| "movq %%mm0,%%mm7 \n\t"/* 7 ; a3 a2*/\ |
| "paddd %%mm5,%%mm2 \n\t"/* 5 ; b3=sum(odd3) b2=sum(odd2)*/\ |
| "paddd %%mm2,%%mm0 \n\t"/* a3+b3 a2+b2*/\ |
| "psrad $11,%%mm4 \n\t"/* y6=a1-b1 y7=a0-b0*/\ |
| "psubd %%mm2,%%mm7 \n\t"/* 2 ; a3-b3 a2-b2*/\ |
| "psrad $11,%%mm0 \n\t"/* y3=a3+b3 y2=a2+b2*/\ |
| "psrad $11,%%mm7 \n\t"/* y4=a3-b3 y5=a2-b2*/\ |
| "packssdw %%mm0,%%mm3 \n\t"/* 0 ; y3 y2 y1 y0*/\ |
| "packssdw %%mm4,%%mm7 \n\t"/* 4 ; y6 y7 y4 y5*/\ |
| "movq %%mm3, " #A2 " \n\t"/* 3 ; save y3 y2 y1 y0*/\ |
| "pshufw $0xb1,%%mm7,%%mm7 \n\t"/* y7 y6 y5 y4*/\ |
| "movq %%mm7,8 +" #A2 "\n\t"/* 7 ; save y7 y6 y5 y4*/\ |
| |
| |
| //----------------------------------------------------------------------------- |
| // |
| // 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 |
| //----------------------------------------------------------------------------- |
| |
| #define DCT_8_INV_COL(A1,A2)\ |
| "movq 2*8(%3),%%mm0\n\t"\ |
| "movq 16*3+" #A1 ",%%mm3\n\t"\ |
| "movq %%mm0,%%mm1 \n\t"/* tg_3_16*/\ |
| "movq 16*5+" #A1 ",%%mm5\n\t"\ |
| "pmulhw %%mm3,%%mm0 \n\t"/* x3*(tg_3_16-1)*/\ |
| "movq (%3),%%mm4\n\t"\ |
| "pmulhw %%mm5,%%mm1 \n\t"/* x5*(tg_3_16-1)*/\ |
| "movq 16*7+" #A1 ",%%mm7\n\t"\ |
| "movq %%mm4,%%mm2 \n\t"/* tg_1_16*/\ |
| "movq 16*1+" #A1 ",%%mm6\n\t"\ |
| "pmulhw %%mm7,%%mm4 \n\t"/* x7*tg_1_16*/\ |
| "paddsw %%mm3,%%mm0 \n\t"/* x3*tg_3_16*/\ |
| "pmulhw %%mm6,%%mm2 \n\t"/* x1*tg_1_16*/\ |
| "paddsw %%mm3,%%mm1 \n\t"/* x3+x5*(tg_3_16-1)*/\ |
| "psubsw %%mm5,%%mm0 \n\t"/* x3*tg_3_16-x5 = tm35*/\ |
| "movq 3*8(%3),%%mm3\n\t"\ |
| "paddsw %%mm5,%%mm1 \n\t"/* x3+x5*tg_3_16 = tp35*/\ |
| "paddsw %%mm6,%%mm4 \n\t"/* x1+tg_1_16*x7 = tp17*/\ |
| "psubsw %%mm7,%%mm2 \n\t"/* x1*tg_1_16-x7 = tm17*/\ |
| "movq %%mm4,%%mm5 \n\t"/* tp17*/\ |
| "movq %%mm2,%%mm6 \n\t"/* tm17*/\ |
| "paddsw %%mm1,%%mm5 \n\t"/* tp17+tp35 = b0*/\ |
| "psubsw %%mm0,%%mm6 \n\t"/* tm17-tm35 = b3*/\ |
| "psubsw %%mm1,%%mm4 \n\t"/* tp17-tp35 = t1*/\ |
| "paddsw %%mm0,%%mm2 \n\t"/* tm17+tm35 = t2*/\ |
| "movq 1*8(%3),%%mm7\n\t"\ |
| "movq %%mm4,%%mm1 \n\t"/* t1*/\ |
| "movq %%mm5,3*16 +" #A2 "\n\t"/* save b0*/\ |
| "paddsw %%mm2,%%mm1 \n\t"/* t1+t2*/\ |
| "movq %%mm6,5*16 +" #A2 "\n\t"/* save b3*/\ |
| "psubsw %%mm2,%%mm4 \n\t"/* t1-t2*/\ |
| "movq 2*16+" #A1 ",%%mm5\n\t"\ |
| "movq %%mm7,%%mm0 \n\t"/* tg_2_16*/\ |
| "movq 6*16+" #A1 ",%%mm6\n\t"\ |
| "pmulhw %%mm5,%%mm0 \n\t"/* x2*tg_2_16*/\ |
| "pmulhw %%mm6,%%mm7 \n\t"/* x6*tg_2_16*/\ |
| "pmulhw %%mm3,%%mm1 \n\t"/* ocos_4_16*(t1+t2) = b1/2*/\ |
| "movq 0*16+" #A1 ",%%mm2\n\t"\ |
| "pmulhw %%mm3,%%mm4 \n\t"/* ocos_4_16*(t1-t2) = b2/2*/\ |
| "psubsw %%mm6,%%mm0 \n\t"/* t2*tg_2_16-x6 = tm26*/\ |
| "movq %%mm2,%%mm3 \n\t"/* x0*/\ |
| "movq 4*16+" #A1 ",%%mm6\n\t"\ |
| "paddsw %%mm5,%%mm7 \n\t"/* x2+x6*tg_2_16 = tp26*/\ |
| "paddsw %%mm6,%%mm2 \n\t"/* x0+x4 = tp04*/\ |
| "psubsw %%mm6,%%mm3 \n\t"/* x0-x4 = tm04*/\ |
| "movq %%mm2,%%mm5 \n\t"/* tp04*/\ |
| "movq %%mm3,%%mm6 \n\t"/* tm04*/\ |
| "psubsw %%mm7,%%mm2 \n\t"/* tp04-tp26 = a3*/\ |
| "paddsw %%mm0,%%mm3 \n\t"/* tm04+tm26 = a1*/\ |
| "paddsw %%mm1,%%mm1 \n\t"/* b1*/\ |
| "paddsw %%mm4,%%mm4 \n\t"/* b2*/\ |
| "paddsw %%mm7,%%mm5 \n\t"/* tp04+tp26 = a0*/\ |
| "psubsw %%mm0,%%mm6 \n\t"/* tm04-tm26 = a2*/\ |
| "movq %%mm3,%%mm7 \n\t"/* a1*/\ |
| "movq %%mm6,%%mm0 \n\t"/* a2*/\ |
| "paddsw %%mm1,%%mm3 \n\t"/* a1+b1*/\ |
| "paddsw %%mm4,%%mm6 \n\t"/* a2+b2*/\ |
| "psraw $6,%%mm3 \n\t"/* dst1*/\ |
| "psubsw %%mm1,%%mm7 \n\t"/* a1-b1*/\ |
| "psraw $6,%%mm6 \n\t"/* dst2*/\ |
| "psubsw %%mm4,%%mm0 \n\t"/* a2-b2*/\ |
| "movq 3*16+" #A2 ",%%mm1 \n\t"/* load b0*/\ |
| "psraw $6,%%mm7 \n\t"/* dst6*/\ |
| "movq %%mm5,%%mm4 \n\t"/* a0*/\ |
| "psraw $6,%%mm0 \n\t"/* dst5*/\ |
| "movq %%mm3,1*16+" #A2 "\n\t"\ |
| "paddsw %%mm1,%%mm5 \n\t"/* a0+b0*/\ |
| "movq %%mm6,2*16+" #A2 "\n\t"\ |
| "psubsw %%mm1,%%mm4 \n\t"/* a0-b0*/\ |
| "movq 5*16+" #A2 ",%%mm3 \n\t"/* load b3*/\ |
| "psraw $6,%%mm5 \n\t"/* dst0*/\ |
| "movq %%mm2,%%mm6 \n\t"/* a3*/\ |
| "psraw $6,%%mm4 \n\t"/* dst7*/\ |
| "movq %%mm0,5*16+" #A2 "\n\t"\ |
| "paddsw %%mm3,%%mm2 \n\t"/* a3+b3*/\ |
| "movq %%mm7,6*16+" #A2 "\n\t"\ |
| "psubsw %%mm3,%%mm6 \n\t"/* a3-b3*/\ |
| "movq %%mm5,0*16+" #A2 "\n\t"\ |
| "psraw $6,%%mm2 \n\t"/* dst3*/\ |
| "movq %%mm4,7*16+" #A2 "\n\t"\ |
| "psraw $6,%%mm6 \n\t"/* dst4*/\ |
| "movq %%mm2,3*16+" #A2 "\n\t"\ |
| "movq %%mm6,4*16+" #A2 "\n\t" |
| |
| //============================================================================= |
| // Code |
| //============================================================================= |
| |
| //----------------------------------------------------------------------------- |
| // void idct_mmx(uint16_t block[64]); |
| //----------------------------------------------------------------------------- |
| |
| |
| void ff_idct_xvid_mmx(short *block){ |
| __asm__ volatile( |
| //# Process each row |
| DCT_8_INV_ROW_MMX(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1)) |
| DCT_8_INV_ROW_MMX(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1)) |
| DCT_8_INV_ROW_MMX(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1)) |
| DCT_8_INV_ROW_MMX(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1)) |
| DCT_8_INV_ROW_MMX(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1)) |
| DCT_8_INV_ROW_MMX(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1)) |
| DCT_8_INV_ROW_MMX(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1)) |
| DCT_8_INV_ROW_MMX(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1)) |
| |
| //# Process the columns (4 at a time) |
| DCT_8_INV_COL(0(%0), 0(%0)) |
| DCT_8_INV_COL(8(%0), 8(%0)) |
| :: "r"(block), "r"(rounder_0), "r"(tab_i_04_mmx), "r"(tg_1_16)); |
| } |
| |
| //----------------------------------------------------------------------------- |
| // void idct_xmm(uint16_t block[64]); |
| //----------------------------------------------------------------------------- |
| |
| |
| void ff_idct_xvid_mmx2(short *block){ |
| __asm__ volatile( |
| //# Process each row |
| DCT_8_INV_ROW_XMM(0*16(%0), 0*16(%0), 64*0(%2), 8*0(%1)) |
| DCT_8_INV_ROW_XMM(1*16(%0), 1*16(%0), 64*1(%2), 8*1(%1)) |
| DCT_8_INV_ROW_XMM(2*16(%0), 2*16(%0), 64*2(%2), 8*2(%1)) |
| DCT_8_INV_ROW_XMM(3*16(%0), 3*16(%0), 64*3(%2), 8*3(%1)) |
| DCT_8_INV_ROW_XMM(4*16(%0), 4*16(%0), 64*0(%2), 8*4(%1)) |
| DCT_8_INV_ROW_XMM(5*16(%0), 5*16(%0), 64*3(%2), 8*5(%1)) |
| DCT_8_INV_ROW_XMM(6*16(%0), 6*16(%0), 64*2(%2), 8*6(%1)) |
| DCT_8_INV_ROW_XMM(7*16(%0), 7*16(%0), 64*1(%2), 8*7(%1)) |
| |
| //# Process the columns (4 at a time) |
| DCT_8_INV_COL(0(%0), 0(%0)) |
| DCT_8_INV_COL(8(%0), 8(%0)) |
| :: "r"(block), "r"(rounder_0), "r"(tab_i_04_xmm), "r"(tg_1_16)); |
| } |
| |
