109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
|
/*
|
||
|
|
* simple math operations
|
||
|
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
|
||
|
|
*
|
||
|
|
* 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 AVCODEC_ARM_MATHOPS_H
|
||
|
|
#define AVCODEC_ARM_MATHOPS_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
#include "config.h"
|
||
|
|
#include "libavutil/common.h"
|
||
|
|
|
||
|
|
#if HAVE_INLINE_ASM
|
||
|
|
|
||
|
|
#if HAVE_ARMV6_INLINE
|
||
|
|
#define MULH MULH
|
||
|
|
static inline av_const int MULH(int a, int b)
|
||
|
|
{
|
||
|
|
int r;
|
||
|
|
__asm__ ("smmul %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define FASTDIV FASTDIV
|
||
|
|
static av_always_inline av_const int FASTDIV(int a, int b)
|
||
|
|
{
|
||
|
|
int r;
|
||
|
|
__asm__ ("cmp %2, #2 \n\t"
|
||
|
|
"ldr %0, [%3, %2, lsl #2] \n\t"
|
||
|
|
"ite le \n\t"
|
||
|
|
"lsrle %0, %1, #1 \n\t"
|
||
|
|
"smmulgt %0, %0, %1 \n\t"
|
||
|
|
: "=&r"(r) : "r"(a), "r"(b), "r"(ff_inverse) : "cc");
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* HAVE_ARMV6_INLINE */
|
||
|
|
|
||
|
|
#define FASTDIV FASTDIV
|
||
|
|
static av_always_inline av_const int FASTDIV(int a, int b)
|
||
|
|
{
|
||
|
|
int r, t;
|
||
|
|
__asm__ ("umull %1, %0, %2, %3"
|
||
|
|
: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b]));
|
||
|
|
return r;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define MLS64(d, a, b) MAC64(d, -(a), b)
|
||
|
|
|
||
|
|
#if HAVE_ARMV5TE_INLINE
|
||
|
|
|
||
|
|
/* signed 16x16 -> 32 multiply add accumulate */
|
||
|
|
# define MAC16(rt, ra, rb) \
|
||
|
|
__asm__ ("smlabb %0, %1, %2, %0" : "+r"(rt) : "r"(ra), "r"(rb));
|
||
|
|
|
||
|
|
/* signed 16x16 -> 32 multiply */
|
||
|
|
# define MUL16 MUL16
|
||
|
|
static inline av_const int MUL16(int ra, int rb)
|
||
|
|
{
|
||
|
|
int rt;
|
||
|
|
__asm__ ("smulbb %0, %1, %2" : "=r"(rt) : "r"(ra), "r"(rb));
|
||
|
|
return rt;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define mid_pred mid_pred
|
||
|
|
static inline av_const int mid_pred(int a, int b, int c)
|
||
|
|
{
|
||
|
|
int m;
|
||
|
|
__asm__ (
|
||
|
|
"mov %0, %2 \n\t"
|
||
|
|
"cmp %1, %2 \n\t"
|
||
|
|
"itt gt \n\t"
|
||
|
|
"movgt %0, %1 \n\t"
|
||
|
|
"movgt %1, %2 \n\t"
|
||
|
|
"cmp %1, %3 \n\t"
|
||
|
|
"it le \n\t"
|
||
|
|
"movle %1, %3 \n\t"
|
||
|
|
"cmp %0, %1 \n\t"
|
||
|
|
"it gt \n\t"
|
||
|
|
"movgt %0, %1 \n\t"
|
||
|
|
: "=&r"(m), "+r"(a)
|
||
|
|
: "r"(b), "r"(c)
|
||
|
|
: "cc");
|
||
|
|
return m;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* HAVE_INLINE_ASM */
|
||
|
|
|
||
|
|
#endif /* AVCODEC_ARM_MATHOPS_H */
|