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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 Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <inttypes.h>

#include "config.h"

#include "libavutil/mem.h"

#include "libavcodec/avcodec.h"

#include "idctdsp.h"
#include "xvididct.h"

#if HAVE_MMX_INLINE

// -----------------------------------------------------------------------------
// 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_xvid_idct_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 ff_xvid_idct_mmx_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
{
    ff_xvid_idct_mmx(block);
    ff_put_pixels_clamped_mmx(block, dest, line_size);
}

void ff_xvid_idct_mmx_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
{
    ff_xvid_idct_mmx(block);
    ff_add_pixels_clamped_mmx(block, dest, line_size);
}

#endif /* HAVE_MMX_INLINE */

#if HAVE_MMXEXT_INLINE

// -----------------------------------------------------------------------------
// void idct_xmm(uint16_t block[64]);
// -----------------------------------------------------------------------------

void ff_xvid_idct_mmxext(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));
}

void ff_xvid_idct_mmxext_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
{
    ff_xvid_idct_mmxext(block);
    ff_put_pixels_clamped_mmx(block, dest, line_size);
}

void ff_xvid_idct_mmxext_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
{
    ff_xvid_idct_mmxext(block);
    ff_add_pixels_clamped_mmx(block, dest, line_size);
}

#endif /* HAVE_MMXEXT_INLINE */