📄 idct_mmx.c
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/*
* idct_mmx.c
* Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
*
* mpeg2dec is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* mpeg2dec 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with mpeg2dec; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "common.h"
#include "dsputil.h"
#include "mmx.h"
#define ATTR_ALIGN(align) __attribute__ ((__aligned__ (align)))
#define ROW_SHIFT 11
#define COL_SHIFT 6
#define round(bias) ((int)(((bias)+0.5) * (1<<ROW_SHIFT)))
#define rounder(bias) {round (bias), round (bias)}
#if 0
/* C row IDCT - it is just here to document the MMXEXT and MMX versions */
static inline void idct_row (int16_t * row, int offset,
int16_t * table, int32_t * rounder)
{
int C1, C2, C3, C4, C5, C6, C7;
int a0, a1, a2, a3, b0, b1, b2, b3;
row += offset;
C1 = table[1];
C2 = table[2];
C3 = table[3];
C4 = table[4];
C5 = table[5];
C6 = table[6];
C7 = table[7];
a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + *rounder;
a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + *rounder;
a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + *rounder;
a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + *rounder;
b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
row[0] = (a0 + b0) >> ROW_SHIFT;
row[1] = (a1 + b1) >> ROW_SHIFT;
row[2] = (a2 + b2) >> ROW_SHIFT;
row[3] = (a3 + b3) >> ROW_SHIFT;
row[4] = (a3 - b3) >> ROW_SHIFT;
row[5] = (a2 - b2) >> ROW_SHIFT;
row[6] = (a1 - b1) >> ROW_SHIFT;
row[7] = (a0 - b0) >> ROW_SHIFT;
}
#endif
/* MMXEXT row IDCT */
#define mmxext_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, -c4, -c2, \
c4, c6, c4, c6, \
c1, c3, -c1, -c5, \
c5, c7, c3, -c7, \
c4, -c6, c4, -c6, \
-c4, c2, c4, -c2, \
c5, -c1, c3, -c1, \
c7, c3, c7, -c5 }
static inline void mmxext_row_head (int16_t * row, int offset, const int16_t * table)
{
movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
movq_m2r (*table, mm3); // mm3 = -C2 -C4 C2 C4
movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
movq_m2r (*(table+4), mm4); // mm4 = C6 C4 C6 C4
pmaddwd_r2r (mm0, mm3); // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
pshufw_r2r (mm2, mm2, 0x4e); // mm2 = x2 x0 x6 x4
}
static inline void mmxext_row (const int16_t * table, const int32_t * rounder)
{
movq_m2r (*(table+8), mm1); // mm1 = -C5 -C1 C3 C1
pmaddwd_r2r (mm2, mm4); // mm4 = C4*x0+C6*x2 C4*x4+C6*x6
pmaddwd_m2r (*(table+16), mm0); // mm0 = C4*x4-C6*x6 C4*x0-C6*x2
pshufw_r2r (mm6, mm6, 0x4e); // mm6 = x3 x1 x7 x5
movq_m2r (*(table+12), mm7); // mm7 = -C7 C3 C7 C5
pmaddwd_r2r (mm5, mm1); // mm1 = -C1*x5-C5*x7 C1*x1+C3*x3
paddd_m2r (*rounder, mm3); // mm3 += rounder
pmaddwd_r2r (mm6, mm7); // mm7 = C3*x1-C7*x3 C5*x5+C7*x7
pmaddwd_m2r (*(table+20), mm2); // mm2 = C4*x0-C2*x2 -C4*x4+C2*x6
paddd_r2r (mm4, mm3); // mm3 = a1 a0 + rounder
pmaddwd_m2r (*(table+24), mm5); // mm5 = C3*x5-C1*x7 C5*x1-C1*x3
movq_r2r (mm3, mm4); // mm4 = a1 a0 + rounder
pmaddwd_m2r (*(table+28), mm6); // mm6 = C7*x1-C5*x3 C7*x5+C3*x7
paddd_r2r (mm7, mm1); // mm1 = b1 b0
paddd_m2r (*rounder, mm0); // mm0 += rounder
psubd_r2r (mm1, mm3); // mm3 = a1-b1 a0-b0 + rounder
psrad_i2r (ROW_SHIFT, mm3); // mm3 = y6 y7
paddd_r2r (mm4, mm1); // mm1 = a1+b1 a0+b0 + rounder
paddd_r2r (mm2, mm0); // mm0 = a3 a2 + rounder
psrad_i2r (ROW_SHIFT, mm1); // mm1 = y1 y0
paddd_r2r (mm6, mm5); // mm5 = b3 b2
movq_r2r (mm0, mm4); // mm4 = a3 a2 + rounder
paddd_r2r (mm5, mm0); // mm0 = a3+b3 a2+b2 + rounder
psubd_r2r (mm5, mm4); // mm4 = a3-b3 a2-b2 + rounder
}
static inline void mmxext_row_tail (int16_t * row, int store)
{
psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
psrad_i2r (ROW_SHIFT, mm4); // mm4 = y4 y5
packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
packssdw_r2r (mm3, mm4); // mm4 = y6 y7 y4 y5
movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
pshufw_r2r (mm4, mm4, 0xb1); // mm4 = y7 y6 y5 y4
/* slot */
movq_r2m (mm4, *(row+store+4)); // save y7 y6 y5 y4
}
static inline void mmxext_row_mid (int16_t * row, int store,
int offset, const int16_t * table)
{
movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
psrad_i2r (ROW_SHIFT, mm4); // mm4 = y4 y5
packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
packssdw_r2r (mm3, mm4); // mm4 = y6 y7 y4 y5
movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
pshufw_r2r (mm4, mm4, 0xb1); // mm4 = y7 y6 y5 y4
movq_m2r (*table, mm3); // mm3 = -C2 -C4 C2 C4
movq_r2m (mm4, *(row+store+4)); // save y7 y6 y5 y4
pmaddwd_r2r (mm0, mm3); // mm3 = -C4*x4-C2*x6 C4*x0+C2*x2
movq_m2r (*(table+4), mm4); // mm4 = C6 C4 C6 C4
pshufw_r2r (mm2, mm2, 0x4e); // mm2 = x2 x0 x6 x4
}
/* MMX row IDCT */
#define mmx_table(c1,c2,c3,c4,c5,c6,c7) { c4, c2, c4, c6, \
c4, c6, -c4, -c2, \
c1, c3, c3, -c7, \
c5, c7, -c1, -c5, \
c4, -c6, c4, -c2, \
-c4, c2, c4, -c6, \
c5, -c1, c7, -c5, \
c7, c3, c3, -c1 }
static inline void mmx_row_head (int16_t * row, int offset, const int16_t * table)
{
movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4
movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4
pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2
movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1
punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4
}
static inline void mmx_row (const int16_t * table, const int32_t * rounder)
{
pmaddwd_r2r (mm2, mm4); // mm4 = -C4*x4-C2*x6 C4*x4+C6*x6
punpckldq_r2r (mm5, mm5); // mm5 = x3 x1 x3 x1
pmaddwd_m2r (*(table+16), mm0); // mm0 = C4*x0-C2*x2 C4*x0-C6*x2
punpckhdq_r2r (mm6, mm6); // mm6 = x7 x5 x7 x5
movq_m2r (*(table+12), mm7); // mm7 = -C5 -C1 C7 C5
pmaddwd_r2r (mm5, mm1); // mm1 = C3*x1-C7*x3 C1*x1+C3*x3
paddd_m2r (*rounder, mm3); // mm3 += rounder
pmaddwd_r2r (mm6, mm7); // mm7 = -C1*x5-C5*x7 C5*x5+C7*x7
pmaddwd_m2r (*(table+20), mm2); // mm2 = C4*x4-C6*x6 -C4*x4+C2*x6
paddd_r2r (mm4, mm3); // mm3 = a1 a0 + rounder
pmaddwd_m2r (*(table+24), mm5); // mm5 = C7*x1-C5*x3 C5*x1-C1*x3
movq_r2r (mm3, mm4); // mm4 = a1 a0 + rounder
pmaddwd_m2r (*(table+28), mm6); // mm6 = C3*x5-C1*x7 C7*x5+C3*x7
paddd_r2r (mm7, mm1); // mm1 = b1 b0
paddd_m2r (*rounder, mm0); // mm0 += rounder
psubd_r2r (mm1, mm3); // mm3 = a1-b1 a0-b0 + rounder
psrad_i2r (ROW_SHIFT, mm3); // mm3 = y6 y7
paddd_r2r (mm4, mm1); // mm1 = a1+b1 a0+b0 + rounder
paddd_r2r (mm2, mm0); // mm0 = a3 a2 + rounder
psrad_i2r (ROW_SHIFT, mm1); // mm1 = y1 y0
paddd_r2r (mm6, mm5); // mm5 = b3 b2
movq_r2r (mm0, mm7); // mm7 = a3 a2 + rounder
paddd_r2r (mm5, mm0); // mm0 = a3+b3 a2+b2 + rounder
psubd_r2r (mm5, mm7); // mm7 = a3-b3 a2-b2 + rounder
}
static inline void mmx_row_tail (int16_t * row, int store)
{
psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
movq_r2r (mm7, mm4); // mm4 = y6 y7 y4 y5
pslld_i2r (16, mm7); // mm7 = y7 0 y5 0
psrld_i2r (16, mm4); // mm4 = 0 y6 0 y4
por_r2r (mm4, mm7); // mm7 = y7 y6 y5 y4
/* slot */
movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4
}
static inline void mmx_row_mid (int16_t * row, int store,
int offset, const int16_t * table)
{
movq_m2r (*(row+offset), mm2); // mm2 = x6 x4 x2 x0
psrad_i2r (ROW_SHIFT, mm0); // mm0 = y3 y2
movq_m2r (*(row+offset+4), mm5); // mm5 = x7 x5 x3 x1
psrad_i2r (ROW_SHIFT, mm7); // mm7 = y4 y5
packssdw_r2r (mm0, mm1); // mm1 = y3 y2 y1 y0
movq_r2r (mm5, mm6); // mm6 = x7 x5 x3 x1
packssdw_r2r (mm3, mm7); // mm7 = y6 y7 y4 y5
movq_r2r (mm2, mm0); // mm0 = x6 x4 x2 x0
movq_r2m (mm1, *(row+store)); // save y3 y2 y1 y0
movq_r2r (mm7, mm1); // mm1 = y6 y7 y4 y5
punpckldq_r2r (mm0, mm0); // mm0 = x2 x0 x2 x0
psrld_i2r (16, mm7); // mm7 = 0 y6 0 y4
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