7ddd0ec6e3b9118e4376c427625c7d894952e19f
[libav.git] / libavcodec / armv4l / mathops.h
1 /*
2 * simple math operations
3 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #ifdef FRAC_BITS
23 # define MULL(a, b) \
24 ({ int lo, hi;\
25 asm("smull %0, %1, %2, %3 \n\t"\
26 "mov %0, %0, lsr %4\n\t"\
27 "add %1, %0, %1, lsl %5\n\t"\
28 : "=&r"(lo), "=&r"(hi)\
29 : "r"(b), "r"(a), "i"(FRAC_BITS), "i"(32-FRAC_BITS));\
30 hi; })
31 #endif
32
33 #define MULH(a, b) \
34 ({ int lo, hi;\
35 asm ("smull %0, %1, %2, %3" : "=&r"(lo), "=&r"(hi) : "r"(b), "r"(a));\
36 hi; })
37
38 #if defined(HAVE_ARMV5TE)
39
40 /* signed 16x16 -> 32 multiply add accumulate */
41 # define MAC16(rt, ra, rb) \
42 asm ("smlabb %0, %2, %3, %0" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
43 /* signed 16x16 -> 32 multiply */
44 # define MUL16(ra, rb) \
45 ({ int __rt; \
46 asm ("smulbb %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
47 __rt; })
48
49 #endif