mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.6 KiB
55 lines
1.6 KiB
15 years ago
|
/*
|
||
|
|
* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
|
||
|
|
*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVUTIL_ARM_INTMATH_H
|
||
|
|
#define AVUTIL_ARM_INTMATH_H
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
#include "libavutil/common.h"
|
||
|
|
|
||
|
|
#if HAVE_INLINE_ASM
|
||
|
|
|
||
|
|
#if HAVE_ARMV6
|
||
|
|
static inline av_const int FASTDIV(int a, int b)
|
||
|
|
{
|
||
|
|
int r, t;
|
||
|
|
__asm__ volatile("cmp %3, #2 \n\t"
|
||
|
|
"ldr %1, [%4, %3, lsl #2] \n\t"
|
||
|
|
"lsrle %0, %2, #1 \n\t"
|
||
|
|
"smmulgt %0, %1, %2 \n\t"
|
||
|
|
: "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse));
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static inline av_const int FASTDIV(int a, int b)
|
||
|
|
{
|
||
|
|
int r, t;
|
||
|
|
__asm__ volatile("umull %1, %0, %2, %3"
|
||
|
|
: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define FASTDIV FASTDIV
|
||
|
|
|
||
|
|
#endif /* HAVE_INLINE_ASM */
|
||
|
|
|
||
|
|
#endif /* AVUTIL_ARM_INTMATH_H */
|