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ffmpeg / libavcodec / i386 / idct_mmx.c @ c11c2bc2

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/*
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 * Note: For libavcodec, this code can also be used under the LGPL license
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 */
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/*
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 * idct_mmx.c
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 * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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 *
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 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
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 *
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 * mpeg2dec is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * mpeg2dec is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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#include "common.h"
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#include "../dsputil.h"
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#include "mmx.h"
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#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
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#define ROW_SHIFT 11
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#define COL_SHIFT 6
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#define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
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#define rounder(bias) {round (bias), round (bias)}
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#if 0
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/* C row IDCT - its just here to document the MMXEXT and MMX versions */
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static inline void idct_row (int16_t * row, int offset,
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                             int16_t * table, int32_t * rounder)
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{
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    int C1, C2, C3, C4, C5, C6, C7;
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    int a0, a1, a2, a3, b0, b1, b2, b3;
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    row += offset;
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    C1 = table[1];
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    C2 = table[2];
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    C3 = table[3];
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    C4 = table[4];
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    C5 = table[5];
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    C6 = table[6];
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    C7 = table[7];
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    a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
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    a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
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    a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
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    a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
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    b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
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    b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
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    b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
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    b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
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    row[0] = (a0 + b0) >> ROW_SHIFT;
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    row[1] = (a1 + b1) >> ROW_SHIFT;
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    row[2] = (a2 + b2) >> ROW_SHIFT;
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    row[3] = (a3 + b3) >> ROW_SHIFT;
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    row[4] = (a3 - b3) >> ROW_SHIFT;
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    row[5] = (a2 - b2) >> ROW_SHIFT;
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    row[6] = (a1 - b1) >> ROW_SHIFT;
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    row[7] = (a0 - b0) >> ROW_SHIFT;
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}
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#endif
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77

    
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/* MMXEXT row IDCT */
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#define mmxext_table(c1,c2,c3,c4,c5,c6,c7)        {  c4,  c2, -c4, -c2,        \
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                                                   c4,  c6,  c4,  c6,        \
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                                                   c1,  c3, -c1, -c5,        \
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                                                   c5,  c7,  c3, -c7,        \
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                                                   c4, -c6,  c4, -c6,        \
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                                                  -c4,  c2,  c4, -c2,        \
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                                                   c5, -c1,  c3, -c1,        \
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                                                   c7,  c3,  c7, -c5 }
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static inline void mmxext_row_head (int16_t * row, int offset, int16_t * table)
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{
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    movq_m2r (*(row+offset), mm2);        // mm2 = x6 x4 x2 x0
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    movq_m2r (*(row+offset+4), mm5);        // mm5 = x7 x5 x3 x1
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    movq_r2r (mm2, mm0);                // mm0 = x6 x4 x2 x0
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    movq_m2r (*table, mm3);                // mm3 = -C2 -C4 C2 C4
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    movq_r2r (mm5, mm6);                // mm6 = x7 x5 x3 x1
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    movq_m2r (*(table+4), mm4);                // mm4 = C6 C4 C6 C4
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    pmaddwd_r2r (mm0, mm3);                // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
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    pshufw_r2r (mm2, mm2, 0x4e);        // mm2 = x2 x0 x6 x4
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}
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static inline void mmxext_row (int16_t * table, int32_t * rounder)
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{
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    movq_m2r (*(table+8), mm1);                // mm1 = -C5 -C1 C3 C1
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    pmaddwd_r2r (mm2, mm4);                // mm4 = C4*x0+C6*x2 C4*x4+C6*x6
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    pmaddwd_m2r (*(table+16), mm0);        // mm0 = C4*x4-C6*x6 C4*x0-C6*x2
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    pshufw_r2r (mm6, mm6, 0x4e);        // mm6 = x3 x1 x7 x5
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    movq_m2r (*(table+12), mm7);        // mm7 = -C7 C3 C7 C5
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    pmaddwd_r2r (mm5, mm1);                // mm1 = -C1*x5-C5*x7 C1*x1+C3*x3
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    paddd_m2r (*rounder, mm3);                // mm3 += rounder
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    pmaddwd_r2r (mm6, mm7);                // mm7 = C3*x1-C7*x3 C5*x5+C7*x7
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    pmaddwd_m2r (*(table+20), mm2);        // mm2 = C4*x0-C2*x2 -C4*x4+C2*x6
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    paddd_r2r (mm4, mm3);                // mm3 = a1 a0 + rounder
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    pmaddwd_m2r (*(table+24), mm5);        // mm5 = C3*x5-C1*x7 C5*x1-C1*x3
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    movq_r2r (mm3, mm4);                // mm4 = a1 a0 + rounder
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    pmaddwd_m2r (*(table+28), mm6);        // mm6 = C7*x1-C5*x3 C7*x5+C3*x7
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    paddd_r2r (mm7, mm1);                // mm1 = b1 b0
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    paddd_m2r (*rounder, mm0);                // mm0 += rounder
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    psubd_r2r (mm1, mm3);                // mm3 = a1-b1 a0-b0 + rounder
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    psrad_i2r (ROW_SHIFT, mm3);                // mm3 = y6 y7
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    paddd_r2r (mm4, mm1);                // mm1 = a1+b1 a0+b0 + rounder
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    paddd_r2r (mm2, mm0);                // mm0 = a3 a2 + rounder
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    psrad_i2r (ROW_SHIFT, mm1);                // mm1 = y1 y0
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    paddd_r2r (mm6, mm5);                // mm5 = b3 b2
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    movq_r2r (mm0, mm4);                // mm4 = a3 a2 + rounder
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    paddd_r2r (mm5, mm0);                // mm0 = a3+b3 a2+b2 + rounder
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    psubd_r2r (mm5, mm4);                // mm4 = a3-b3 a2-b2 + rounder
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}
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static inline void mmxext_row_tail (int16_t * row, int store)
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{
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    psrad_i2r (ROW_SHIFT, mm0);                // mm0 = y3 y2
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    psrad_i2r (ROW_SHIFT, mm4);                // mm4 = y4 y5
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    packssdw_r2r (mm0, mm1);                // mm1 = y3 y2 y1 y0
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    packssdw_r2r (mm3, mm4);                // mm4 = y6 y7 y4 y5
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    movq_r2m (mm1, *(row+store));        // save y3 y2 y1 y0
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    pshufw_r2r (mm4, mm4, 0xb1);        // mm4 = y7 y6 y5 y4
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    /* slot */
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    movq_r2m (mm4, *(row+store+4));        // save y7 y6 y5 y4
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}
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static inline void mmxext_row_mid (int16_t * row, int store,
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                                   int offset, int16_t * table)
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{
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    movq_m2r (*(row+offset), mm2);        // mm2 = x6 x4 x2 x0
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    psrad_i2r (ROW_SHIFT, mm0);                // mm0 = y3 y2
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    movq_m2r (*(row+offset+4), mm5);        // mm5 = x7 x5 x3 x1
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    psrad_i2r (ROW_SHIFT, mm4);                // mm4 = y4 y5
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    packssdw_r2r (mm0, mm1);                // mm1 = y3 y2 y1 y0
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    movq_r2r (mm5, mm6);                // mm6 = x7 x5 x3 x1
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    packssdw_r2r (mm3, mm4);                // mm4 = y6 y7 y4 y5
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    movq_r2r (mm2, mm0);                // mm0 = x6 x4 x2 x0
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    movq_r2m (mm1, *(row+store));        // save y3 y2 y1 y0
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    pshufw_r2r (mm4, mm4, 0xb1);        // mm4 = y7 y6 y5 y4
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    movq_m2r (*table, mm3);                // mm3 = -C2 -C4 C2 C4
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    movq_r2m (mm4, *(row+store+4));        // save y7 y6 y5 y4
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    pmaddwd_r2r (mm0, mm3);                // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
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    movq_m2r (*(table+4), mm4);                // mm4 = C6 C4 C6 C4
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    pshufw_r2r (mm2, mm2, 0x4e);        // mm2 = x2 x0 x6 x4
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}
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/* MMX row IDCT */
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#define mmx_table(c1,c2,c3,c4,c5,c6,c7)        {  c4,  c2,  c4,  c6,        \
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                                           c4,  c6, -c4, -c2,        \
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                                           c1,  c3,  c3, -c7,        \
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                                           c5,  c7, -c1, -c5,        \
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                                           c4, -c6,  c4, -c2,        \
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                                          -c4,  c2,  c4, -c6,        \
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                                           c5, -c1,  c7, -c5,        \
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                                           c7,  c3,  c3, -c1 }
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static inline void mmx_row_head (int16_t * row, int offset, int16_t * table)
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{
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    movq_m2r (*(row+offset), mm2);        // mm2 = x6 x4 x2 x0
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    movq_m2r (*(row+offset+4), mm5);        // mm5 = x7 x5 x3 x1
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    movq_r2r (mm2, mm0);                // mm0 = x6 x4 x2 x0
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    movq_m2r (*table, mm3);                // mm3 = C6 C4 C2 C4
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    movq_r2r (mm5, mm6);                // mm6 = x7 x5 x3 x1
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    punpckldq_r2r (mm0, mm0);                // mm0 = x2 x0 x2 x0
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    movq_m2r (*(table+4), mm4);                // mm4 = -C2 -C4 C6 C4
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    pmaddwd_r2r (mm0, mm3);                // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
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    movq_m2r (*(table+8), mm1);                // mm1 = -C7 C3 C3 C1
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    punpckhdq_r2r (mm2, mm2);                // mm2 = x6 x4 x6 x4
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}
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static inline void mmx_row (int16_t * table, int32_t * rounder)
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{
222
    pmaddwd_r2r (mm2, mm4);                // mm4 = -C4*x4-C2*x6 C4*x4+C6*x6
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    punpckldq_r2r (mm5, mm5);                // mm5 = x3 x1 x3 x1
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    pmaddwd_m2r (*(table+16), mm0);        // mm0 = C4*x0-C2*x2 C4*x0-C6*x2
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    punpckhdq_r2r (mm6, mm6);                // mm6 = x7 x5 x7 x5
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    movq_m2r (*(table+12), mm7);        // mm7 = -C5 -C1 C7 C5
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    pmaddwd_r2r (mm5, mm1);                // mm1 = C3*x1-C7*x3 C1*x1+C3*x3
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    paddd_m2r (*rounder, mm3);                // mm3 += rounder
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    pmaddwd_r2r (mm6, mm7);                // mm7 = -C1*x5-C5*x7 C5*x5+C7*x7
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    pmaddwd_m2r (*(table+20), mm2);        // mm2 = C4*x4-C6*x6 -C4*x4+C2*x6
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    paddd_r2r (mm4, mm3);                // mm3 = a1 a0 + rounder
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    pmaddwd_m2r (*(table+24), mm5);        // mm5 = C7*x1-C5*x3 C5*x1-C1*x3
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    movq_r2r (mm3, mm4);                // mm4 = a1 a0 + rounder
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    pmaddwd_m2r (*(table+28), mm6);        // mm6 = C3*x5-C1*x7 C7*x5+C3*x7
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    paddd_r2r (mm7, mm1);                // mm1 = b1 b0
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    paddd_m2r (*rounder, mm0);                // mm0 += rounder
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    psubd_r2r (mm1, mm3);                // mm3 = a1-b1 a0-b0 + rounder
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    psrad_i2r (ROW_SHIFT, mm3);                // mm3 = y6 y7
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    paddd_r2r (mm4, mm1);                // mm1 = a1+b1 a0+b0 + rounder
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    paddd_r2r (mm2, mm0);                // mm0 = a3 a2 + rounder
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    psrad_i2r (ROW_SHIFT, mm1);                // mm1 = y1 y0
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    paddd_r2r (mm6, mm5);                // mm5 = b3 b2
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    movq_r2r (mm0, mm7);                // mm7 = a3 a2 + rounder
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    paddd_r2r (mm5, mm0);                // mm0 = a3+b3 a2+b2 + rounder
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    psubd_r2r (mm5, mm7);                // mm7 = a3-b3 a2-b2 + rounder
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}
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static inline void mmx_row_tail (int16_t * row, int store)
260
{
261
    psrad_i2r (ROW_SHIFT, mm0);                // mm0 = y3 y2
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263
    psrad_i2r (ROW_SHIFT, mm7);                // mm7 = y4 y5
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    packssdw_r2r (mm0, mm1);                // mm1 = y3 y2 y1 y0
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267
    packssdw_r2r (mm3, mm7);                // mm7 = y6 y7 y4 y5
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    movq_r2m (mm1, *(row+store));        // save y3 y2 y1 y0
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    movq_r2r (mm7, mm4);                // mm4 = y6 y7 y4 y5
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    pslld_i2r (16, mm7);                // mm7 = y7 0 y5 0
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274
    psrld_i2r (16, mm4);                // mm4 = 0 y6 0 y4
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276
    por_r2r (mm4, mm7);                        // mm7 = y7 y6 y5 y4
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278
    /* slot */
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280
    movq_r2m (mm7, *(row+store+4));        // save y7 y6 y5 y4
281
}
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static inline void mmx_row_mid (int16_t * row, int store,
284
                                int offset, int16_t * table)
285
{
286
    movq_m2r (*(row+offset), mm2);        // mm2 = x6 x4 x2 x0
287
    psrad_i2r (ROW_SHIFT, mm0);                // mm0 = y3 y2
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289
    movq_m2r (*(row+offset+4), mm5);        // mm5 = x7 x5 x3 x1
290
    psrad_i2r (ROW_SHIFT, mm7);                // mm7 = y4 y5
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292
    packssdw_r2r (mm0, mm1);                // mm1 = y3 y2 y1 y0
293
    movq_r2r (mm5, mm6);                // mm6 = x7 x5 x3 x1
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295
    packssdw_r2r (mm3, mm7);                // mm7 = y6 y7 y4 y5
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    movq_r2r (mm2, mm0);                // mm0 = x6 x4 x2 x0
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298
    movq_r2m (mm1, *(row+store));        // save y3 y2 y1 y0
299
    movq_r2r (mm7, mm1);                // mm1 = y6 y7 y4 y5
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301
    punpckldq_r2r (mm0, mm0);                // mm0 = x2 x0 x2 x0
302
    psrld_i2r (16, mm7);                // mm7 = 0 y6 0 y4
303

    
304
    movq_m2r (*table, mm3);                // mm3 = C6 C4 C2 C4
305
    pslld_i2r (16, mm1);                // mm1 = y7 0 y5 0
306

    
307
    movq_m2r (*(table+4), mm4);                // mm4 = -C2 -C4 C6 C4
308
    por_r2r (mm1, mm7);                        // mm7 = y7 y6 y5 y4
309

    
310
    movq_m2r (*(table+8), mm1);                // mm1 = -C7 C3 C3 C1
311
    punpckhdq_r2r (mm2, mm2);                // mm2 = x6 x4 x6 x4
312

    
313
    movq_r2m (mm7, *(row+store+4));        // save y7 y6 y5 y4
314
    pmaddwd_r2r (mm0, mm3);                // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
315
}
316

    
317

    
318
#if 0
319
// C column IDCT - its just here to document the MMXEXT and MMX versions
320
static inline void idct_col (int16_t * col, int offset)
321
{
322
/* multiplication - as implemented on mmx */
323
#define F(c,x) (((c) * (x)) >> 16)
324

325
/* saturation - it helps us handle torture test cases */
326
#define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
327

328
    int16_t x0, x1, x2, x3, x4, x5, x6, x7;
329
    int16_t y0, y1, y2, y3, y4, y5, y6, y7;
330
    int16_t a0, a1, a2, a3, b0, b1, b2, b3;
331
    int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
332

333
    col += offset;
334

335
    x0 = col[0*8];
336
    x1 = col[1*8];
337
    x2 = col[2*8];
338
    x3 = col[3*8];
339
    x4 = col[4*8];
340
    x5 = col[5*8];
341
    x6 = col[6*8];
342
    x7 = col[7*8];
343

344
    u04 = S (x0 + x4);
345
    v04 = S (x0 - x4);
346
    u26 = S (F (T2, x6) + x2);
347
    v26 = S (F (T2, x2) - x6);
348

349
    a0 = S (u04 + u26);
350
    a1 = S (v04 + v26);
351
    a2 = S (v04 - v26);
352
    a3 = S (u04 - u26);
353

354
    u17 = S (F (T1, x7) + x1);
355
    v17 = S (F (T1, x1) - x7);
356
    u35 = S (F (T3, x5) + x3);
357
    v35 = S (F (T3, x3) - x5);
358

359
    b0 = S (u17 + u35);
360
    b3 = S (v17 - v35);
361
    u12 = S (u17 - u35);
362
    v12 = S (v17 + v35);
363
    u12 = S (2 * F (C4, u12));
364
    v12 = S (2 * F (C4, v12));
365
    b1 = S (u12 + v12);
366
    b2 = S (u12 - v12);
367

368
    y0 = S (a0 + b0) >> COL_SHIFT;
369
    y1 = S (a1 + b1) >> COL_SHIFT;
370
    y2 = S (a2 + b2) >> COL_SHIFT;
371
    y3 = S (a3 + b3) >> COL_SHIFT;
372

373
    y4 = S (a3 - b3) >> COL_SHIFT;
374
    y5 = S (a2 - b2) >> COL_SHIFT;
375
    y6 = S (a1 - b1) >> COL_SHIFT;
376
    y7 = S (a0 - b0) >> COL_SHIFT;
377

378
    col[0*8] = y0;
379
    col[1*8] = y1;
380
    col[2*8] = y2;
381
    col[3*8] = y3;
382
    col[4*8] = y4;
383
    col[5*8] = y5;
384
    col[6*8] = y6;
385
    col[7*8] = y7;
386
}
387
#endif
388

    
389

    
390
// MMX column IDCT
391
static inline void idct_col (int16_t * col, int offset)
392
{
393
#define T1 13036
394
#define T2 27146
395
#define T3 43790
396
#define C4 23170
397

    
398
    static short _T1[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
399
    static short _T2[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
400
    static short _T3[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
401
    static short _C4[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
402

    
403
    /* column code adapted from peter gubanov */
404
    /* http://www.elecard.com/peter/idct.shtml */
405

    
406
    movq_m2r (*_T1, mm0);                // mm0 = T1
407

    
408
    movq_m2r (*(col+offset+1*8), mm1);        // mm1 = x1
409
    movq_r2r (mm0, mm2);                // mm2 = T1
410

    
411
    movq_m2r (*(col+offset+7*8), mm4);        // mm4 = x7
412
    pmulhw_r2r (mm1, mm0);                // mm0 = T1*x1
413

    
414
    movq_m2r (*_T3, mm5);                // mm5 = T3
415
    pmulhw_r2r (mm4, mm2);                // mm2 = T1*x7
416

    
417
    movq_m2r (*(col+offset+5*8), mm6);        // mm6 = x5
418
    movq_r2r (mm5, mm7);                // mm7 = T3-1
419

    
420
    movq_m2r (*(col+offset+3*8), mm3);        // mm3 = x3
421
    psubsw_r2r (mm4, mm0);                // mm0 = v17
422

    
423
    movq_m2r (*_T2, mm4);                // mm4 = T2
424
    pmulhw_r2r (mm3, mm5);                // mm5 = (T3-1)*x3
425

    
426
    paddsw_r2r (mm2, mm1);                // mm1 = u17
427
    pmulhw_r2r (mm6, mm7);                // mm7 = (T3-1)*x5
428

    
429
    /* slot */
430

    
431
    movq_r2r (mm4, mm2);                // mm2 = T2
432
    paddsw_r2r (mm3, mm5);                // mm5 = T3*x3
433

    
434
    pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2
435
    paddsw_r2r (mm6, mm7);                // mm7 = T3*x5
436

    
437
    psubsw_r2r (mm6, mm5);                // mm5 = v35
438
    paddsw_r2r (mm3, mm7);                // mm7 = u35
439

    
440
    movq_m2r (*(col+offset+6*8), mm3);        // mm3 = x6
441
    movq_r2r (mm0, mm6);                // mm6 = v17
442

    
443
    pmulhw_r2r (mm3, mm2);                // mm2 = T2*x6
444
    psubsw_r2r (mm5, mm0);                // mm0 = b3
445

    
446
    psubsw_r2r (mm3, mm4);                // mm4 = v26
447
    paddsw_r2r (mm6, mm5);                // mm5 = v12
448

    
449
    movq_r2m (mm0, *(col+offset+3*8));        // save b3 in scratch0
450
    movq_r2r (mm1, mm6);                // mm6 = u17
451

    
452
    paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26
453
    paddsw_r2r (mm7, mm6);                // mm6 = b0
454

    
455
    psubsw_r2r (mm7, mm1);                // mm1 = u12
456
    movq_r2r (mm1, mm7);                // mm7 = u12
457

    
458
    movq_m2r (*(col+offset+0*8), mm3);        // mm3 = x0
459
    paddsw_r2r (mm5, mm1);                // mm1 = u12+v12
460

    
461
    movq_m2r (*_C4, mm0);                // mm0 = C4/2
462
    psubsw_r2r (mm5, mm7);                // mm7 = u12-v12
463

    
464
    movq_r2m (mm6, *(col+offset+5*8));        // save b0 in scratch1
465
    pmulhw_r2r (mm0, mm1);                // mm1 = b1/2
466

    
467
    movq_r2r (mm4, mm6);                // mm6 = v26
468
    pmulhw_r2r (mm0, mm7);                // mm7 = b2/2
469

    
470
    movq_m2r (*(col+offset+4*8), mm5);        // mm5 = x4
471
    movq_r2r (mm3, mm0);                // mm0 = x0
472

    
473
    psubsw_r2r (mm5, mm3);                // mm3 = v04
474
    paddsw_r2r (mm5, mm0);                // mm0 = u04
475

    
476
    paddsw_r2r (mm3, mm4);                // mm4 = a1
477
    movq_r2r (mm0, mm5);                // mm5 = u04
478

    
479
    psubsw_r2r (mm6, mm3);                // mm3 = a2
480
    paddsw_r2r (mm2, mm5);                // mm5 = a0
481

    
482
    paddsw_r2r (mm1, mm1);                // mm1 = b1
483
    psubsw_r2r (mm2, mm0);                // mm0 = a3
484

    
485
    paddsw_r2r (mm7, mm7);                // mm7 = b2
486
    movq_r2r (mm3, mm2);                // mm2 = a2
487

    
488
    movq_r2r (mm4, mm6);                // mm6 = a1
489
    paddsw_r2r (mm7, mm3);                // mm3 = a2+b2
490

    
491
    psraw_i2r (COL_SHIFT, mm3);                // mm3 = y2
492
    paddsw_r2r (mm1, mm4);                // mm4 = a1+b1
493

    
494
    psraw_i2r (COL_SHIFT, mm4);                // mm4 = y1
495
    psubsw_r2r (mm1, mm6);                // mm6 = a1-b1
496

    
497
    movq_m2r (*(col+offset+5*8), mm1);        // mm1 = b0
498
    psubsw_r2r (mm7, mm2);                // mm2 = a2-b2
499

    
500
    psraw_i2r (COL_SHIFT, mm6);                // mm6 = y6
501
    movq_r2r (mm5, mm7);                // mm7 = a0
502

    
503
    movq_r2m (mm4, *(col+offset+1*8));        // save y1
504
    psraw_i2r (COL_SHIFT, mm2);                // mm2 = y5
505

    
506
    movq_r2m (mm3, *(col+offset+2*8));        // save y2
507
    paddsw_r2r (mm1, mm5);                // mm5 = a0+b0
508

    
509
    movq_m2r (*(col+offset+3*8), mm4);        // mm4 = b3
510
    psubsw_r2r (mm1, mm7);                // mm7 = a0-b0
511

    
512
    psraw_i2r (COL_SHIFT, mm5);                // mm5 = y0
513
    movq_r2r (mm0, mm3);                // mm3 = a3
514

    
515
    movq_r2m (mm2, *(col+offset+5*8));        // save y5
516
    psubsw_r2r (mm4, mm3);                // mm3 = a3-b3
517

    
518
    psraw_i2r (COL_SHIFT, mm7);                // mm7 = y7
519
    paddsw_r2r (mm0, mm4);                // mm4 = a3+b3
520

    
521
    movq_r2m (mm5, *(col+offset+0*8));        // save y0
522
    psraw_i2r (COL_SHIFT, mm3);                // mm3 = y4
523

    
524
    movq_r2m (mm6, *(col+offset+6*8));        // save y6
525
    psraw_i2r (COL_SHIFT, mm4);                // mm4 = y3
526

    
527
    movq_r2m (mm7, *(col+offset+7*8));        // save y7
528

    
529
    movq_r2m (mm3, *(col+offset+4*8));        // save y4
530

    
531
    movq_r2m (mm4, *(col+offset+3*8));        // save y3
532

    
533
#undef T1
534
#undef T2
535
#undef T3
536
#undef C4
537
}
538

    
539
static int32_t rounder0[] ATTR_ALIGN(8) =
540
    rounder ((1 << (COL_SHIFT - 1)) - 0.5);
541
static int32_t rounder4[] ATTR_ALIGN(8) = rounder (0);
542
static int32_t rounder1[] ATTR_ALIGN(8) =
543
    rounder (1.25683487303);        /* C1*(C1/C4+C1+C7)/2 */
544
static int32_t rounder7[] ATTR_ALIGN(8) =
545
    rounder (-0.25);                /* C1*(C7/C4+C7-C1)/2 */
546
static int32_t rounder2[] ATTR_ALIGN(8) =
547
    rounder (0.60355339059);        /* C2 * (C6+C2)/2 */
548
static int32_t rounder6[] ATTR_ALIGN(8) =
549
    rounder (-0.25);                /* C2 * (C6-C2)/2 */
550
static int32_t rounder3[] ATTR_ALIGN(8) =
551
    rounder (0.087788325588);        /* C3*(-C3/C4+C3+C5)/2 */
552
static int32_t rounder5[] ATTR_ALIGN(8) =
553
    rounder (-0.441341716183);        /* C3*(-C5/C4+C5-C3)/2 */
554

    
555
#undef COL_SHIFT
556
#undef ROW_SHIFT
557

    
558
#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid)        \
559
void idct (int16_t * block)                                        \
560
{                                                                        \
561
    static int16_t table04[] ATTR_ALIGN(16) =                                \
562
        table (22725, 21407, 19266, 16384, 12873,  8867, 4520);                \
563
    static int16_t table17[] ATTR_ALIGN(16) =                                \
564
        table (31521, 29692, 26722, 22725, 17855, 12299, 6270);                \
565
    static int16_t table26[] ATTR_ALIGN(16) =                                \
566
        table (29692, 27969, 25172, 21407, 16819, 11585, 5906);                \
567
    static int16_t table35[] ATTR_ALIGN(16) =                                \
568
        table (26722, 25172, 22654, 19266, 15137, 10426, 5315);                \
569
                                                                        \
570
    idct_row_head (block, 0*8, table04);                                \
571
    idct_row (table04, rounder0);                                        \
572
    idct_row_mid (block, 0*8, 4*8, table04);                                \
573
    idct_row (table04, rounder4);                                        \
574
    idct_row_mid (block, 4*8, 1*8, table17);                                \
575
    idct_row (table17, rounder1);                                        \
576
    idct_row_mid (block, 1*8, 7*8, table17);                                \
577
    idct_row (table17, rounder7);                                        \
578
    idct_row_mid (block, 7*8, 2*8, table26);                                \
579
    idct_row (table26, rounder2);                                        \
580
    idct_row_mid (block, 2*8, 6*8, table26);                                \
581
    idct_row (table26, rounder6);                                        \
582
    idct_row_mid (block, 6*8, 3*8, table35);                                \
583
    idct_row (table35, rounder3);                                        \
584
    idct_row_mid (block, 3*8, 5*8, table35);                                \
585
    idct_row (table35, rounder5);                                        \
586
    idct_row_tail (block, 5*8);                                                \
587
                                                                        \
588
    idct_col (block, 0);                                                \
589
    idct_col (block, 4);                                                \
590
}
591

    
592
void ff_mmx_idct(DCTELEM *block);
593
void ff_mmxext_idct(DCTELEM *block);
594

    
595
declare_idct (ff_mmxext_idct, mmxext_table,
596
              mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)
597

    
598
declare_idct (ff_mmx_idct, mmx_table,
599
              mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)
600