2 * Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVUTIL_ARM_INTMATH_H
22 #define AVUTIL_ARM_INTMATH_H
25 #include "libavutil/attributes.h"
30 static inline av_const int FASTDIV(int a, int b)
33 __asm__ volatile("cmp %3, #2 \n\t"
34 "ldr %1, [%4, %3, lsl #2] \n\t"
35 "lsrle %0, %2, #1 \n\t"
36 "smmulgt %0, %1, %2 \n\t"
37 : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
41 static inline av_const int FASTDIV(int a, int b)
44 __asm__ volatile("umull %1, %0, %2, %3"
45 : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
50 #define FASTDIV FASTDIV
52 #endif /* HAVE_INLINE_ASM */
54 #endif /* AVUTIL_ARM_INTMATH_H */