2 * simple math operations
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 # define MULL(ra, rb) \
24 ({ int rt, dummy; asm (\
26 "shrdl %4, %%edx, %%eax \n\t"\
27 : "=a"(rt), "=d"(dummy)\
28 : "a" (ra), "rm" (rb), "i"(FRAC_BITS));\
32 #define MULH(ra, rb) \
34 asm ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" (ra), "rm" (rb));\
37 #define MUL64(ra, rb) \
39 asm ("imull %2\n\t" : "=A"(rt) : "a" (ra), "g" (rb));\