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