/* * idct_mmx.c * Copyright (C) 1999-2001 Aaron Holtzman * * 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; 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 movq_m2r (*table, mm3); // mm3 = C6 C4 C2 C4 pslld_i2r (16, mm1); // mm1 = y7 0 y5 0 movq_m2r (*(table+4), mm4); // mm4 = -C2 -C4 C6 C4 por_r2r (mm1, mm7); // mm7 = y7 y6 y5 y4 movq_m2r (*(table+8), mm1); // mm1 = -C7 C3 C3 C1 punpckhdq_r2r (mm2, mm2); // mm2 = x6 x4 x6 x4 movq_r2m (mm7, *(row+store+4)); // save y7 y6 y5 y4 pmaddwd_r2r (mm0, mm3); // mm3 = C4*x0+C6*x2 C4*x0+C2*x2 } #if 0 // C column IDCT - it is just here to document the MMXEXT and MMX versions static inline void idct_col (int16_t * col, int offset) { /* multiplication - as implemented on mmx */ #define F(c,x) (((c) * (x)) >> 16) /* saturation - it helps us handle torture test cases */ #define S(x) (((x)>32767) ? 32767 : ((x)<-32768) ? -32768 : (x)) int16_t x0, x1, x2, x3, x4, x5, x6, x7; int16_t y0, y1, y2, y3, y4, y5, y6, y7; int16_t a0, a1, a2, a3, b0, b1, b2, b3; int16_t u04, v04, u26, v26, u17, v17, u35, v35, u12, v12; col += offset; x0 = col[0*8]; x1 = col[1*8]; x2 = col[2*8]; x3 = col[3*8]; x4 = col[4*8]; x5 = col[5*8]; x6 = col[6*8]; x7 = col[7*8]; u04 = S (x0 + x4); v04 = S (x0 - x4); u26 = S (F (T2, x6) + x2); v26 = S (F (T2, x2) - x6); a0 = S (u04 + u26); a1 = S (v04 + v26); a2 = S (v04 - v26); a3 = S (u04 - u26); u17 = S (F (T1, x7) + x1); v17 = S (F (T1, x1) - x7); u35 = S (F (T3, x5) + x3); v35 = S (F (T3, x3) - x5); b0 = S (u17 + u35); b3 = S (v17 - v35); u12 = S (u17 - u35); v12 = S (v17 + v35); u12 = S (2 * F (C4, u12)); v12 = S (2 * F (C4, v12)); b1 = S (u12 + v12); b2 = S (u12 - v12); y0 = S (a0 + b0) >> COL_SHIFT; y1 = S (a1 + b1) >> COL_SHIFT; y2 = S (a2 + b2) >> COL_SHIFT; y3 = S (a3 + b3) >> COL_SHIFT; y4 = S (a3 - b3) >> COL_SHIFT; y5 = S (a2 - b2) >> COL_SHIFT; y6 = S (a1 - b1) >> COL_SHIFT; y7 = S (a0 - b0) >> COL_SHIFT; col[0*8] = y0; col[1*8] = y1; col[2*8] = y2; col[3*8] = y3; col[4*8] = y4; col[5*8] = y5; col[6*8] = y6; col[7*8] = y7; } #endif // MMX column IDCT static inline void idct_col (int16_t * col, int offset) { #define T1 13036 #define T2 27146 #define T3 43790 #define C4 23170 static const short t1_vector[] ATTR_ALIGN(8) = {T1,T1,T1,T1}; static const short t2_vector[] ATTR_ALIGN(8) = {T2,T2,T2,T2}; static const short t3_vector[] ATTR_ALIGN(8) = {T3,T3,T3,T3}; static const short c4_vector[] ATTR_ALIGN(8) = {C4,C4,C4,C4}; /* column code adapted from Peter Gubanov */ /* http://www.elecard.com/peter/idct.shtml */ movq_m2r (*t1_vector, mm0); // mm0 = T1 movq_m2r (*(col+offset+1*8), mm1); // mm1 = x1 movq_r2r (mm0, mm2); // mm2 = T1 movq_m2r (*(col+offset+7*8), mm4); // mm4 = x7 pmulhw_r2r (mm1, mm0); // mm0 = T1*x1 movq_m2r (*t3_vector, mm5); // mm5 = T3 pmulhw_r2r (mm4, mm2); // mm2 = T1*x7 movq_m2r (*(col+offset+5*8), mm6); // mm6 = x5 movq_r2r (mm5, mm7); // mm7 = T3-1 movq_m2r (*(col+offset+3*8), mm3); // mm3 = x3 psubsw_r2r (mm4, mm0); // mm0 = v17 movq_m2r (*t2_vector, mm4); // mm4 = T2 pmulhw_r2r (mm3, mm5); // mm5 = (T3-1)*x3 paddsw_r2r (mm2, mm1); // mm1 = u17 pmulhw_r2r (mm6, mm7); // mm7 = (T3-1)*x5 /* slot */ movq_r2r (mm4, mm2); // mm2 = T2 paddsw_r2r (mm3, mm5); // mm5 = T3*x3 pmulhw_m2r (*(col+offset+2*8), mm4);// mm4 = T2*x2 paddsw_r2r (mm6, mm7); // mm7 = T3*x5 psubsw_r2r (mm6, mm5); // mm5 = v35 paddsw_r2r (mm3, mm7); // mm7 = u35 movq_m2r (*(col+offset+6*8), mm3); // mm3 = x6 movq_r2r (mm0, mm6); // mm6 = v17 pmulhw_r2r (mm3, mm2); // mm2 = T2*x6 psubsw_r2r (mm5, mm0); // mm0 = b3 psubsw_r2r (mm3, mm4); // mm4 = v26 paddsw_r2r (mm6, mm5); // mm5 = v12 movq_r2m (mm0, *(col+offset+3*8)); // save b3 in scratch0 movq_r2r (mm1, mm6); // mm6 = u17 paddsw_m2r (*(col+offset+2*8), mm2);// mm2 = u26 paddsw_r2r (mm7, mm6); // mm6 = b0 psubsw_r2r (mm7, mm1); // mm1 = u12 movq_r2r (mm1, mm7); // mm7 = u12 movq_m2r (*(col+offset+0*8), mm3); // mm3 = x0 paddsw_r2r (mm5, mm1); // mm1 = u12+v12 movq_m2r (*c4_vector, mm0); // mm0 = C4/2 psubsw_r2r (mm5, mm7); // mm7 = u12-v12 movq_r2m (mm6, *(col+offset+5*8)); // save b0 in scratch1 pmulhw_r2r (mm0, mm1); // mm1 = b1/2 movq_r2r (mm4, mm6); // mm6 = v26 pmulhw_r2r (mm0, mm7); // mm7 = b2/2 movq_m2r (*(col+offset+4*8), mm5); // mm5 = x4 movq_r2r (mm3, mm0); // mm0 = x0 psubsw_r2r (mm5, mm3); // mm3 = v04 paddsw_r2r (mm5, mm0); // mm0 = u04 paddsw_r2r (mm3, mm4); // mm4 = a1 movq_r2r (mm0, mm5); // mm5 = u04 psubsw_r2r (mm6, mm3); // mm3 = a2 paddsw_r2r (mm2, mm5); // mm5 = a0 paddsw_r2r (mm1, mm1); // mm1 = b1 psubsw_r2r (mm2, mm0); // mm0 = a3 paddsw_r2r (mm7, mm7); // mm7 = b2 movq_r2r (mm3, mm2); // mm2 = a2 movq_r2r (mm4, mm6); // mm6 = a1 paddsw_r2r (mm7, mm3); // mm3 = a2+b2 psraw_i2r (COL_SHIFT, mm3); // mm3 = y2 paddsw_r2r (mm1, mm4); // mm4 = a1+b1 psraw_i2r (COL_SHIFT, mm4); // mm4 = y1 psubsw_r2r (mm1, mm6); // mm6 = a1-b1 movq_m2r (*(col+offset+5*8), mm1); // mm1 = b0 psubsw_r2r (mm7, mm2); // mm2 = a2-b2 psraw_i2r (COL_SHIFT, mm6); // mm6 = y6 movq_r2r (mm5, mm7); // mm7 = a0 movq_r2m (mm4, *(col+offset+1*8)); // save y1 psraw_i2r (COL_SHIFT, mm2); // mm2 = y5 movq_r2m (mm3, *(col+offset+2*8)); // save y2 paddsw_r2r (mm1, mm5); // mm5 = a0+b0 movq_m2r (*(col+offset+3*8), mm4); // mm4 = b3 psubsw_r2r (mm1, mm7); // mm7 = a0-b0 psraw_i2r (COL_SHIFT, mm5); // mm5 = y0 movq_r2r (mm0, mm3); // mm3 = a3 movq_r2m (mm2, *(col+offset+5*8)); // save y5 psubsw_r2r (mm4, mm3); // mm3 = a3-b3 psraw_i2r (COL_SHIFT, mm7); // mm7 = y7 paddsw_r2r (mm0, mm4); // mm4 = a3+b3 movq_r2m (mm5, *(col+offset+0*8)); // save y0 psraw_i2r (COL_SHIFT, mm3); // mm3 = y4 movq_r2m (mm6, *(col+offset+6*8)); // save y6 psraw_i2r (COL_SHIFT, mm4); // mm4 = y3 movq_r2m (mm7, *(col+offset+7*8)); // save y7 movq_r2m (mm3, *(col+offset+4*8)); // save y4 movq_r2m (mm4, *(col+offset+3*8)); // save y3 #undef T1 #undef T2 #undef T3 #undef C4 } static const int32_t rounder0[] ATTR_ALIGN(8) = rounder ((1 << (COL_SHIFT - 1)) - 0.5); static const int32_t rounder4[] ATTR_ALIGN(8) = rounder (0); static const int32_t rounder1[] ATTR_ALIGN(8) = rounder (1.25683487303); /* C1*(C1/C4+C1+C7)/2 */ static const int32_t rounder7[] ATTR_ALIGN(8) = rounder (-0.25); /* C1*(C7/C4+C7-C1)/2 */ static const int32_t rounder2[] ATTR_ALIGN(8) = rounder (0.60355339059); /* C2 * (C6+C2)/2 */ static const int32_t rounder6[] ATTR_ALIGN(8) = rounder (-0.25); /* C2 * (C6-C2)/2 */ static const int32_t rounder3[] ATTR_ALIGN(8) = rounder (0.087788325588); /* C3*(-C3/C4+C3+C5)/2 */ static const int32_t rounder5[] ATTR_ALIGN(8) = rounder (-0.441341716183); /* C3*(-C5/C4+C5-C3)/2 */ #undef COL_SHIFT #undef ROW_SHIFT #define declare_idct(idct,table,idct_row_head,idct_row,idct_row_tail,idct_row_mid) \ void idct (int16_t * block) \ { \ static const int16_t table04[] ATTR_ALIGN(16) = \ table (22725, 21407, 19266, 16384, 12873, 8867, 4520); \ static const int16_t table17[] ATTR_ALIGN(16) = \ table (31521, 29692, 26722, 22725, 17855, 12299, 6270); \ static const int16_t table26[] ATTR_ALIGN(16) = \ table (29692, 27969, 25172, 21407, 16819, 11585, 5906); \ static const int16_t table35[] ATTR_ALIGN(16) = \ table (26722, 25172, 22654, 19266, 15137, 10426, 5315); \ \ idct_row_head (block, 0*8, table04); \ idct_row (table04, rounder0); \ idct_row_mid (block, 0*8, 4*8, table04); \ idct_row (table04, rounder4); \ idct_row_mid (block, 4*8, 1*8, table17); \ idct_row (table17, rounder1); \ idct_row_mid (block, 1*8, 7*8, table17); \ idct_row (table17, rounder7); \ idct_row_mid (block, 7*8, 2*8, table26); \ idct_row (table26, rounder2); \ idct_row_mid (block, 2*8, 6*8, table26); \ idct_row (table26, rounder6); \ idct_row_mid (block, 6*8, 3*8, table35); \ idct_row (table35, rounder3); \ idct_row_mid (block, 3*8, 5*8, table35); \ idct_row (table35, rounder5); \ idct_row_tail (block, 5*8); \ \ idct_col (block, 0); \ idct_col (block, 4); \ } void ff_mmx_idct(DCTELEM *block); void ff_mmxext_idct(DCTELEM *block); declare_idct (ff_mmxext_idct, mmxext_table, mmxext_row_head, mmxext_row, mmxext_row_tail, mmxext_row_mid) declare_idct (ff_mmx_idct, mmx_table, mmx_row_head, mmx_row, mmx_row_tail, mmx_row_mid)