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600 lines
18 KiB
600 lines
18 KiB
/* |
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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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/* 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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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) |
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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, mm7); // mm7 = 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, 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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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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movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4 |
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pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2 |
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} |
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#if 0 |
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// C column IDCT - its just here to document the MMXEXT and MMX versions |
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static inline void idct_col (int16_t * col, int offset) |
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{ |
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/* multiplication - as implemented on mmx */ |
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#define F(c,x) (((c) * (x)) >> 16) |
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/* saturation - it helps us handle torture test cases */ |
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#define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x)) |
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int16_t x0, x1, x2, x3, x4, x5, x6, x7; |
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int16_t y0, y1, y2, y3, y4, y5, y6, y7; |
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int16_t a0, a1, a2, a3, b0, b1, b2, b3; |
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int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12; |
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col += offset; |
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x0 = col[0*8]; |
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x1 = col[1*8]; |
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x2 = col[2*8]; |
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x3 = col[3*8]; |
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x4 = col[4*8]; |
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x5 = col[5*8]; |
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x6 = col[6*8]; |
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x7 = col[7*8]; |
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u04 = S (x0 + x4); |
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v04 = S (x0 - x4); |
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u26 = S (F (T2, x6) + x2); |
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v26 = S (F (T2, x2) - x6); |
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a0 = S (u04 + u26); |
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a1 = S (v04 + v26); |
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a2 = S (v04 - v26); |
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a3 = S (u04 - u26); |
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u17 = S (F (T1, x7) + x1); |
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v17 = S (F (T1, x1) - x7); |
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u35 = S (F (T3, x5) + x3); |
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v35 = S (F (T3, x3) - x5); |
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b0 = S (u17 + u35); |
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b3 = S (v17 - v35); |
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u12 = S (u17 - u35); |
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v12 = S (v17 + v35); |
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u12 = S (2 * F (C4, u12)); |
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v12 = S (2 * F (C4, v12)); |
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b1 = S (u12 + v12); |
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b2 = S (u12 - v12); |
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y0 = S (a0 + b0) >> COL_SHIFT; |
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y1 = S (a1 + b1) >> COL_SHIFT; |
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y2 = S (a2 + b2) >> COL_SHIFT; |
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y3 = S (a3 + b3) >> COL_SHIFT; |
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y4 = S (a3 - b3) >> COL_SHIFT; |
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y5 = S (a2 - b2) >> COL_SHIFT; |
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y6 = S (a1 - b1) >> COL_SHIFT; |
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y7 = S (a0 - b0) >> COL_SHIFT; |
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col[0*8] = y0; |
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col[1*8] = y1; |
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col[2*8] = y2; |
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col[3*8] = y3; |
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col[4*8] = y4; |
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col[5*8] = y5; |
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col[6*8] = y6; |
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col[7*8] = y7; |
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} |
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#endif |
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// MMX column IDCT |
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static inline void idct_col (int16_t * col, int offset) |
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{ |
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#define T1 13036 |
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#define T2 27146 |
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#define T3 43790 |
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#define C4 23170 |
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static const short _T1[] ATTR_ALIGN(8) = {T1,T1,T1,T1}; |
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static const short _T2[] ATTR_ALIGN(8) = {T2,T2,T2,T2}; |
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static const short _T3[] ATTR_ALIGN(8) = {T3,T3,T3,T3}; |
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static const short _C4[] ATTR_ALIGN(8) = {C4,C4,C4,C4}; |
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/* column code adapted from peter gubanov */ |
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/* http://www.elecard.com/peter/idct.shtml */ |
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movq_m2r (*_T1, mm0); // mm0 = T1 |
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movq_m2r (*(col+offset+1*8), mm1); // mm1 = x1 |
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movq_r2r (mm0, mm2); // mm2 = T1 |
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movq_m2r (*(col+offset+7*8), mm4); // mm4 = x7 |
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pmulhw_r2r (mm1, mm0); // mm0 = T1*x1 |
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movq_m2r (*_T3, mm5); // mm5 = T3 |
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pmulhw_r2r (mm4, mm2); // mm2 = T1*x7 |
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movq_m2r (*(col+offset+5*8), mm6); // mm6 = x5 |
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movq_r2r (mm5, mm7); // mm7 = T3-1 |
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movq_m2r (*(col+offset+3*8), mm3); // mm3 = x3 |
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psubsw_r2r (mm4, mm0); // mm0 = v17 |
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movq_m2r (*_T2, mm4); // mm4 = T2 |
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pmulhw_r2r (mm3, mm5); // mm5 = (T3-1)*x3 |
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paddsw_r2r (mm2, mm1); // mm1 = u17 |
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pmulhw_r2r (mm6, mm7); // mm7 = (T3-1)*x5 |
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/* slot */ |
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movq_r2r (mm4, mm2); // mm2 = T2 |
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paddsw_r2r (mm3, mm5); // mm5 = T3*x3 |
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pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2 |
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paddsw_r2r (mm6, mm7); // mm7 = T3*x5 |
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psubsw_r2r (mm6, mm5); // mm5 = v35 |
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paddsw_r2r (mm3, mm7); // mm7 = u35 |
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movq_m2r (*(col+offset+6*8), mm3); // mm3 = x6 |
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movq_r2r (mm0, mm6); // mm6 = v17 |
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pmulhw_r2r (mm3, mm2); // mm2 = T2*x6 |
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psubsw_r2r (mm5, mm0); // mm0 = b3 |
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psubsw_r2r (mm3, mm4); // mm4 = v26 |
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paddsw_r2r (mm6, mm5); // mm5 = v12 |
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movq_r2m (mm0, *(col+offset+3*8)); // save b3 in scratch0 |
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movq_r2r (mm1, mm6); // mm6 = u17 |
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paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26 |
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paddsw_r2r (mm7, mm6); // mm6 = b0 |
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psubsw_r2r (mm7, mm1); // mm1 = u12 |
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movq_r2r (mm1, mm7); // mm7 = u12 |
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movq_m2r (*(col+offset+0*8), mm3); // mm3 = x0 |
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paddsw_r2r (mm5, mm1); // mm1 = u12+v12 |
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movq_m2r (*_C4, mm0); // mm0 = C4/2 |
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psubsw_r2r (mm5, mm7); // mm7 = u12-v12 |
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movq_r2m (mm6, *(col+offset+5*8)); // save b0 in scratch1 |
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pmulhw_r2r (mm0, mm1); // mm1 = b1/2 |
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movq_r2r (mm4, mm6); // mm6 = v26 |
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pmulhw_r2r (mm0, mm7); // mm7 = b2/2 |
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movq_m2r (*(col+offset+4*8), mm5); // mm5 = x4 |
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movq_r2r (mm3, mm0); // mm0 = x0 |
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psubsw_r2r (mm5, mm3); // mm3 = v04 |
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paddsw_r2r (mm5, mm0); // mm0 = u04 |
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paddsw_r2r (mm3, mm4); // mm4 = a1 |
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movq_r2r (mm0, mm5); // mm5 = u04 |
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psubsw_r2r (mm6, mm3); // mm3 = a2 |
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paddsw_r2r (mm2, mm5); // mm5 = a0 |
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paddsw_r2r (mm1, mm1); // mm1 = b1 |
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psubsw_r2r (mm2, mm0); // mm0 = a3 |
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paddsw_r2r (mm7, mm7); // mm7 = b2 |
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movq_r2r (mm3, mm2); // mm2 = a2 |
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movq_r2r (mm4, mm6); // mm6 = a1 |
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paddsw_r2r (mm7, mm3); // mm3 = a2+b2 |
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psraw_i2r (COL_SHIFT, mm3); // mm3 = y2 |
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paddsw_r2r (mm1, mm4); // mm4 = a1+b1 |
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psraw_i2r (COL_SHIFT, mm4); // mm4 = y1 |
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psubsw_r2r (mm1, mm6); // mm6 = a1-b1 |
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movq_m2r (*(col+offset+5*8), mm1); // mm1 = b0 |
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psubsw_r2r (mm7, mm2); // mm2 = a2-b2 |
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psraw_i2r (COL_SHIFT, mm6); // mm6 = y6 |
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movq_r2r (mm5, mm7); // mm7 = a0 |
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movq_r2m (mm4, *(col+offset+1*8)); // save y1 |
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psraw_i2r (COL_SHIFT, mm2); // mm2 = y5 |
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movq_r2m (mm3, *(col+offset+2*8)); // save y2 |
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paddsw_r2r (mm1, mm5); // mm5 = a0+b0 |
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movq_m2r (*(col+offset+3*8), mm4); // mm4 = b3 |
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psubsw_r2r (mm1, mm7); // mm7 = a0-b0 |
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psraw_i2r (COL_SHIFT, mm5); // mm5 = y0 |
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movq_r2r (mm0, mm3); // mm3 = a3 |
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movq_r2m (mm2, *(col+offset+5*8)); // save y5 |
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psubsw_r2r (mm4, mm3); // mm3 = a3-b3 |
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psraw_i2r (COL_SHIFT, mm7); // mm7 = y7 |
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paddsw_r2r (mm0, mm4); // mm4 = a3+b3 |
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movq_r2m (mm5, *(col+offset+0*8)); // save y0 |
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psraw_i2r (COL_SHIFT, mm3); // mm3 = y4 |
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movq_r2m (mm6, *(col+offset+6*8)); // save y6 |
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psraw_i2r (COL_SHIFT, mm4); // mm4 = y3 |
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movq_r2m (mm7, *(col+offset+7*8)); // save y7 |
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movq_r2m (mm3, *(col+offset+4*8)); // save y4 |
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movq_r2m (mm4, *(col+offset+3*8)); // save y3 |
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#undef T1 |
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#undef T2 |
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#undef T3 |
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#undef C4 |
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} |
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static const int32_t rounder0[] ATTR_ALIGN(8) = |
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rounder ((1 << (COL_SHIFT - 1)) - 0.5); |
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static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0); |
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static const int32_t rounder1[] ATTR_ALIGN(8) = |
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rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */ |
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static const int32_t rounder7[] ATTR_ALIGN(8) = |
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rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */ |
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static const int32_t rounder2[] ATTR_ALIGN(8) = |
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rounder (0.60355339059); /* C2 * (C6+C2)/2 */ |
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static const int32_t rounder6[] ATTR_ALIGN(8) = |
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rounder (-0.25); /* C2 * (C6-C2)/2 */ |
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static const int32_t rounder3[] ATTR_ALIGN(8) = |
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rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */ |
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static const int32_t rounder5[] ATTR_ALIGN(8) = |
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rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */ |
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#undef COL_SHIFT |
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#undef ROW_SHIFT |
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#define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \ |
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void idct (int16_t * block) \ |
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{ \ |
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static const int16_t table04[] ATTR_ALIGN(16) = \ |
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table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \ |
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static const int16_t table17[] ATTR_ALIGN(16) = \ |
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table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \ |
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static const int16_t table26[] ATTR_ALIGN(16) = \ |
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table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \ |
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static const int16_t table35[] ATTR_ALIGN(16) = \ |
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table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \ |
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\ |
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idct_row_head (block, 0*8, table04); \ |
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idct_row (table04, rounder0); \ |
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idct_row_mid (block, 0*8, 4*8, table04); \ |
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idct_row (table04, rounder4); \ |
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idct_row_mid (block, 4*8, 1*8, table17); \ |
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idct_row (table17, rounder1); \ |
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idct_row_mid (block, 1*8, 7*8, table17); \ |
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idct_row (table17, rounder7); \ |
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idct_row_mid (block, 7*8, 2*8, table26); \ |
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idct_row (table26, rounder2); \ |
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idct_row_mid (block, 2*8, 6*8, table26); \ |
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idct_row (table26, rounder6); \ |
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idct_row_mid (block, 6*8, 3*8, table35); \ |
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idct_row (table35, rounder3); \ |
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idct_row_mid (block, 3*8, 5*8, table35); \ |
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idct_row (table35, rounder5); \ |
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idct_row_tail (block, 5*8); \ |
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\ |
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idct_col (block, 0); \ |
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idct_col (block, 4); \ |
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} |
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void ff_mmx_idct(DCTELEM *block); |
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void ff_mmxext_idct(DCTELEM *block); |
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declare_idct (ff_mmxext_idct, mmxext_table, |
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mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid) |
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declare_idct (ff_mmx_idct, mmx_table, |
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mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid) |
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