00001 /* 00002 * simple math operations 00003 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef FFMPEG_I386_MATHOPS_H 00023 #define FFMPEG_I386_MATHOPS_H 00024 00025 #ifdef FRAC_BITS 00026 # define MULL(ra, rb) \ 00027 ({ int rt, dummy; asm (\ 00028 "imull %3 \n\t"\ 00029 "shrdl %4, %%edx, %%eax \n\t"\ 00030 : "=a"(rt), "=d"(dummy)\ 00031 : "a" (ra), "rm" (rb), "i"(FRAC_BITS));\ 00032 rt; }) 00033 #endif 00034 00035 #define MULH(ra, rb) \ 00036 ({ int rt, dummy;\ 00037 asm ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" (ra), "rm" (rb));\ 00038 rt; }) 00039 00040 #define MUL64(ra, rb) \ 00041 ({ int64_t rt;\ 00042 asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb));\ 00043 rt; }) 00044 00045 #endif /* FFMPEG_I386_MATHOPS_H */