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/*
* 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"
#include "idct_xvid.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));
}
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