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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 mpeg2dec; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 - it is 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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/* 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, const 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 (const int16_t * table, const 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, const 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, const 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 (const int16_t * table, const int32_t * rounder)
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{
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    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)
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{
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    psrad_i2r (ROW_SHIFT, mm0);         // mm0 = y3 y2
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260
    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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    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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    psrld_i2r (16, mm4);                // mm4 = 0 y6 0 y4
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    por_r2r (mm4, mm7);                 // mm7 = y7 y6 y5 y4
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    /* slot */
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    movq_r2m (mm7, *(row+store+4));     // save y7 y6 y5 y4
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}
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static inline void mmx_row_mid (int16_t * row, int store,
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                                int offset, const int16_t * table)
282
{
283
    movq_m2r (*(row+offset), mm2);      // mm2 = x6 x4 x2 x0
284
    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, mm7);         // mm7 = y4 y5
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289
    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, mm7);            // mm7 = 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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    movq_r2r (mm7, mm1);                // mm1 = y6 y7 y4 y5
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    punpckldq_r2r (mm0, mm0);           // mm0 = x2 x0 x2 x0
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    psrld_i2r (16, mm7);                // mm7 = 0 y6 0 y4
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301
    movq_m2r (*table, mm3);             // mm3 = C6 C4 C2 C4
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    pslld_i2r (16, mm1);                // mm1 = y7 0 y5 0
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    movq_m2r (*(table+4), mm4);         // mm4 = -C2 -C4 C6 C4
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    por_r2r (mm1, mm7);                 // mm7 = y7 y6 y5 y4
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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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310
    movq_r2m (mm7, *(row+store+4));     // save y7 y6 y5 y4
311
    pmaddwd_r2r (mm0, mm3);             // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
312
}
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315
#if 0
316
// C column IDCT - it is just here to document the MMXEXT and MMX versions
317
static inline void idct_col (int16_t * col, int offset)
318
{
319
/* multiplication - as implemented on mmx */
320
#define F(c,x) (((c) * (x)) >> 16)
321

322
/* saturation - it helps us handle torture test cases */
323
#define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x))
324

325
    int16_t x0, x1, x2, x3, x4, x5, x6, x7;
326
    int16_t y0, y1, y2, y3, y4, y5, y6, y7;
327
    int16_t a0, a1, a2, a3, b0, b1, b2, b3;
328
    int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12;
329

330
    col += offset;
331

332
    x0 = col[0*8];
333
    x1 = col[1*8];
334
    x2 = col[2*8];
335
    x3 = col[3*8];
336
    x4 = col[4*8];
337
    x5 = col[5*8];
338
    x6 = col[6*8];
339
    x7 = col[7*8];
340

341
    u04 = S (x0 + x4);
342
    v04 = S (x0 - x4);
343
    u26 = S (F (T2, x6) + x2);
344
    v26 = S (F (T2, x2) - x6);
345

346
    a0 = S (u04 + u26);
347
    a1 = S (v04 + v26);
348
    a2 = S (v04 - v26);
349
    a3 = S (u04 - u26);
350

351
    u17 = S (F (T1, x7) + x1);
352
    v17 = S (F (T1, x1) - x7);
353
    u35 = S (F (T3, x5) + x3);
354
    v35 = S (F (T3, x3) - x5);
355

356
    b0 = S (u17 + u35);
357
    b3 = S (v17 - v35);
358
    u12 = S (u17 - u35);
359
    v12 = S (v17 + v35);
360
    u12 = S (2 * F (C4, u12));
361
    v12 = S (2 * F (C4, v12));
362
    b1 = S (u12 + v12);
363
    b2 = S (u12 - v12);
364

365
    y0 = S (a0 + b0) >> COL_SHIFT;
366
    y1 = S (a1 + b1) >> COL_SHIFT;
367
    y2 = S (a2 + b2) >> COL_SHIFT;
368
    y3 = S (a3 + b3) >> COL_SHIFT;
369

370
    y4 = S (a3 - b3) >> COL_SHIFT;
371
    y5 = S (a2 - b2) >> COL_SHIFT;
372
    y6 = S (a1 - b1) >> COL_SHIFT;
373
    y7 = S (a0 - b0) >> COL_SHIFT;
374

375
    col[0*8] = y0;
376
    col[1*8] = y1;
377
    col[2*8] = y2;
378
    col[3*8] = y3;
379
    col[4*8] = y4;
380
    col[5*8] = y5;
381
    col[6*8] = y6;
382
    col[7*8] = y7;
383
}
384
#endif
385

    
386

    
387
// MMX column IDCT
388
static inline void idct_col (int16_t * col, int offset)
389
{
390
#define T1 13036
391
#define T2 27146
392
#define T3 43790
393
#define C4 23170
394

    
395
    static const short _T1[] ATTR_ALIGN(8) = {T1,T1,T1,T1};
396
    static const short _T2[] ATTR_ALIGN(8) = {T2,T2,T2,T2};
397
    static const short _T3[] ATTR_ALIGN(8) = {T3,T3,T3,T3};
398
    static const short _C4[] ATTR_ALIGN(8) = {C4,C4,C4,C4};
399

    
400
    /* column code adapted from peter gubanov */
401
    /* http://www.elecard.com/peter/idct.shtml */
402

    
403
    movq_m2r (*_T1, mm0);               // mm0 = T1
404

    
405
    movq_m2r (*(col+offset+1*8), mm1);  // mm1 = x1
406
    movq_r2r (mm0, mm2);                // mm2 = T1
407

    
408
    movq_m2r (*(col+offset+7*8), mm4);  // mm4 = x7
409
    pmulhw_r2r (mm1, mm0);              // mm0 = T1*x1
410

    
411
    movq_m2r (*_T3, mm5);               // mm5 = T3
412
    pmulhw_r2r (mm4, mm2);              // mm2 = T1*x7
413

    
414
    movq_m2r (*(col+offset+5*8), mm6);  // mm6 = x5
415
    movq_r2r (mm5, mm7);                // mm7 = T3-1
416

    
417
    movq_m2r (*(col+offset+3*8), mm3);  // mm3 = x3
418
    psubsw_r2r (mm4, mm0);              // mm0 = v17
419

    
420
    movq_m2r (*_T2, mm4);               // mm4 = T2
421
    pmulhw_r2r (mm3, mm5);              // mm5 = (T3-1)*x3
422

    
423
    paddsw_r2r (mm2, mm1);              // mm1 = u17
424
    pmulhw_r2r (mm6, mm7);              // mm7 = (T3-1)*x5
425

    
426
    /* slot */
427

    
428
    movq_r2r (mm4, mm2);                // mm2 = T2
429
    paddsw_r2r (mm3, mm5);              // mm5 = T3*x3
430

    
431
    pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2
432
    paddsw_r2r (mm6, mm7);              // mm7 = T3*x5
433

    
434
    psubsw_r2r (mm6, mm5);              // mm5 = v35
435
    paddsw_r2r (mm3, mm7);              // mm7 = u35
436

    
437
    movq_m2r (*(col+offset+6*8), mm3);  // mm3 = x6
438
    movq_r2r (mm0, mm6);                // mm6 = v17
439

    
440
    pmulhw_r2r (mm3, mm2);              // mm2 = T2*x6
441
    psubsw_r2r (mm5, mm0);              // mm0 = b3
442

    
443
    psubsw_r2r (mm3, mm4);              // mm4 = v26
444
    paddsw_r2r (mm6, mm5);              // mm5 = v12
445

    
446
    movq_r2m (mm0, *(col+offset+3*8));  // save b3 in scratch0
447
    movq_r2r (mm1, mm6);                // mm6 = u17
448

    
449
    paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26
450
    paddsw_r2r (mm7, mm6);              // mm6 = b0
451

    
452
    psubsw_r2r (mm7, mm1);              // mm1 = u12
453
    movq_r2r (mm1, mm7);                // mm7 = u12
454

    
455
    movq_m2r (*(col+offset+0*8), mm3);  // mm3 = x0
456
    paddsw_r2r (mm5, mm1);              // mm1 = u12+v12
457

    
458
    movq_m2r (*_C4, mm0);               // mm0 = C4/2
459
    psubsw_r2r (mm5, mm7);              // mm7 = u12-v12
460

    
461
    movq_r2m (mm6, *(col+offset+5*8));  // save b0 in scratch1
462
    pmulhw_r2r (mm0, mm1);              // mm1 = b1/2
463

    
464
    movq_r2r (mm4, mm6);                // mm6 = v26
465
    pmulhw_r2r (mm0, mm7);              // mm7 = b2/2
466

    
467
    movq_m2r (*(col+offset+4*8), mm5);  // mm5 = x4
468
    movq_r2r (mm3, mm0);                // mm0 = x0
469

    
470
    psubsw_r2r (mm5, mm3);              // mm3 = v04
471
    paddsw_r2r (mm5, mm0);              // mm0 = u04
472

    
473
    paddsw_r2r (mm3, mm4);              // mm4 = a1
474
    movq_r2r (mm0, mm5);                // mm5 = u04
475

    
476
    psubsw_r2r (mm6, mm3);              // mm3 = a2
477
    paddsw_r2r (mm2, mm5);              // mm5 = a0
478

    
479
    paddsw_r2r (mm1, mm1);              // mm1 = b1
480
    psubsw_r2r (mm2, mm0);              // mm0 = a3
481

    
482
    paddsw_r2r (mm7, mm7);              // mm7 = b2
483
    movq_r2r (mm3, mm2);                // mm2 = a2
484

    
485
    movq_r2r (mm4, mm6);                // mm6 = a1
486
    paddsw_r2r (mm7, mm3);              // mm3 = a2+b2
487

    
488
    psraw_i2r (COL_SHIFT, mm3);         // mm3 = y2
489
    paddsw_r2r (mm1, mm4);              // mm4 = a1+b1
490

    
491
    psraw_i2r (COL_SHIFT, mm4);         // mm4 = y1
492
    psubsw_r2r (mm1, mm6);              // mm6 = a1-b1
493

    
494
    movq_m2r (*(col+offset+5*8), mm1);  // mm1 = b0
495
    psubsw_r2r (mm7, mm2);              // mm2 = a2-b2
496

    
497
    psraw_i2r (COL_SHIFT, mm6);         // mm6 = y6
498
    movq_r2r (mm5, mm7);                // mm7 = a0
499

    
500
    movq_r2m (mm4, *(col+offset+1*8));  // save y1
501
    psraw_i2r (COL_SHIFT, mm2);         // mm2 = y5
502

    
503
    movq_r2m (mm3, *(col+offset+2*8));  // save y2
504
    paddsw_r2r (mm1, mm5);              // mm5 = a0+b0
505

    
506
    movq_m2r (*(col+offset+3*8), mm4);  // mm4 = b3
507
    psubsw_r2r (mm1, mm7);              // mm7 = a0-b0
508

    
509
    psraw_i2r (COL_SHIFT, mm5);         // mm5 = y0
510
    movq_r2r (mm0, mm3);                // mm3 = a3
511

    
512
    movq_r2m (mm2, *(col+offset+5*8));  // save y5
513
    psubsw_r2r (mm4, mm3);              // mm3 = a3-b3
514

    
515
    psraw_i2r (COL_SHIFT, mm7);         // mm7 = y7
516
    paddsw_r2r (mm0, mm4);              // mm4 = a3+b3
517

    
518
    movq_r2m (mm5, *(col+offset+0*8));  // save y0
519
    psraw_i2r (COL_SHIFT, mm3);         // mm3 = y4
520

    
521
    movq_r2m (mm6, *(col+offset+6*8));  // save y6
522
    psraw_i2r (COL_SHIFT, mm4);         // mm4 = y3
523

    
524
    movq_r2m (mm7, *(col+offset+7*8));  // save y7
525

    
526
    movq_r2m (mm3, *(col+offset+4*8));  // save y4
527

    
528
    movq_r2m (mm4, *(col+offset+3*8));  // save y3
529

    
530
#undef T1
531
#undef T2
532
#undef T3
533
#undef C4
534
}
535

    
536
static const int32_t rounder0[] ATTR_ALIGN(8) =
537
    rounder ((1 << (COL_SHIFT - 1)) - 0.5);
538
static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0);
539
static const int32_t rounder1[] ATTR_ALIGN(8) =
540
    rounder (1.25683487303);        /* C1*(C1/C4+C1+C7)/2 */
541
static const int32_t rounder7[] ATTR_ALIGN(8) =
542
    rounder (-0.25);                /* C1*(C7/C4+C7-C1)/2 */
543
static const int32_t rounder2[] ATTR_ALIGN(8) =
544
    rounder (0.60355339059);        /* C2 * (C6+C2)/2 */
545
static const int32_t rounder6[] ATTR_ALIGN(8) =
546
    rounder (-0.25);                /* C2 * (C6-C2)/2 */
547
static const int32_t rounder3[] ATTR_ALIGN(8) =
548
    rounder (0.087788325588);       /* C3*(-C3/C4+C3+C5)/2 */
549
static const int32_t rounder5[] ATTR_ALIGN(8) =
550
    rounder (-0.441341716183);      /* C3*(-C5/C4+C5-C3)/2 */
551

    
552
#undef COL_SHIFT
553
#undef ROW_SHIFT
554

    
555
#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \
556
void idct (int16_t * block)                                             \
557
{                                                                       \
558
    static const int16_t table04[] ATTR_ALIGN(16) =                     \
559
        table (22725, 21407, 19266, 16384, 12873,  8867, 4520);         \
560
    static const int16_t table17[] ATTR_ALIGN(16) =                     \
561
        table (31521, 29692, 26722, 22725, 17855, 12299, 6270);         \
562
    static const int16_t table26[] ATTR_ALIGN(16) =                     \
563
        table (29692, 27969, 25172, 21407, 16819, 11585, 5906);         \
564
    static const int16_t table35[] ATTR_ALIGN(16) =                     \
565
        table (26722, 25172, 22654, 19266, 15137, 10426, 5315);         \
566
                                                                        \
567
    idct_row_head (block, 0*8, table04);                                \
568
    idct_row (table04, rounder0);                                       \
569
    idct_row_mid (block, 0*8, 4*8, table04);                            \
570
    idct_row (table04, rounder4);                                       \
571
    idct_row_mid (block, 4*8, 1*8, table17);                            \
572
    idct_row (table17, rounder1);                                       \
573
    idct_row_mid (block, 1*8, 7*8, table17);                            \
574
    idct_row (table17, rounder7);                                       \
575
    idct_row_mid (block, 7*8, 2*8, table26);                            \
576
    idct_row (table26, rounder2);                                       \
577
    idct_row_mid (block, 2*8, 6*8, table26);                            \
578
    idct_row (table26, rounder6);                                       \
579
    idct_row_mid (block, 6*8, 3*8, table35);                            \
580
    idct_row (table35, rounder3);                                       \
581
    idct_row_mid (block, 3*8, 5*8, table35);                            \
582
    idct_row (table35, rounder5);                                       \
583
    idct_row_tail (block, 5*8);                                         \
584
                                                                        \
585
    idct_col (block, 0);                                                \
586
    idct_col (block, 4);                                                \
587
}
588

    
589
void ff_mmx_idct(DCTELEM *block);
590
void ff_mmxext_idct(DCTELEM *block);
591

    
592
declare_idct (ff_mmxext_idct, mmxext_table,
593
              mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid)
594

    
595
declare_idct (ff_mmx_idct, mmx_table,
596
              mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)
597