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AVR32: optimised mathops.h

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44% faster MP3 decoding

Originally committed as revision 19667 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2009-08-17 02:23:53 +00:00
parent 6b052ba88f
commit b7904f78c1
2 changed files with 102 additions and 0 deletions
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100
libavcodec/avr32/mathops.h Normal file
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@ -0,0 +1,100 @@
/*
* Simple math operations
* Copyright (c) 2009 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 AVCODEC_AVR32_MATHOPS_H
#define AVCODEC_AVR32_MATHOPS_H
#include <stdint.h>
#include "libavutil/common.h"
#if HAVE_INLINE_ASM
#define MULL MULL
static inline av_const int MULL(int a, int b, unsigned shift)
{
union { int64_t x; int hl[2]; } x;
__asm__ ("muls.d %0, %1, %2 \n\t"
"lsr %0, %3 \n\t"
"or %0, %0, %m0<<%4 \n\t"
: "=r"(x) : "r"(b), "r"(a), "i"(shift), "i"(32-shift));
return x.hl[1];
}
#define MULH MULH
static inline av_const int MULH(int a, int b)
{
union { int64_t x; int hl[2]; } x;
__asm__ ("muls.d %0, %1, %2" : "=r"(x.x) : "r"(a), "r"(b));
return x.hl[0];
}
#define MUL64 MUL64
static inline av_const int64_t MUL64(int a, int b)
{
int64_t x;
__asm__ ("muls.d %0, %1, %2" : "=r"(x) : "r"(a), "r"(b));
return x;
}
static inline av_const int64_t MAC64(int64_t d, int a, int b)
{
__asm__ ("macs.d %0, %1, %2" : "+r"(d) : "r"(a), "r"(b));
return d;
}
#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
#define MLS64(d, a, b) MAC64(d, -(a), b)
static inline av_const int MAC16(int d, int a, int b)
{
__asm__ ("machh.w %0, %1:b, %2:b" : "+r"(d) : "r"(a), "r"(b));
return d;
}
#define MAC16(d, a, b) ((d) = MAC16(d, a, b))
#define MLS16(d, a, b) MAC16(d, -(a), b)
#define MUL16 MUL16
static inline av_const int MUL16(int a, int b)
{
int d;
__asm__ ("mulhh.w %0, %1:b, %2:b" : "=r"(d) : "r"(a), "r"(b));
return d;
}
#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"
"cp.w %1, %2 \n\t"
"movgt %0, %1 \n\t"
"movgt %1, %2 \n\t"
"cp.w %1, %3 \n\t"
"movle %1, %3 \n\t"
"cp.w %0, %1 \n\t"
"movgt %0, %1 \n\t"
: "=&r"(m), "+r"(a)
: "r"(b), "r"(c));
return m;
}
#endif /* HAVE_INLINE_ASM */
#endif /* AVCODEC_AVR32_MATHOPS_H */

2
libavcodec/mathops.h
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@ -26,6 +26,8 @@
#if ARCH_ARM
# include "arm/mathops.h"
#elif ARCH_AVR32
# include "avr32/mathops.h"
#elif ARCH_BFIN
# include "bfin/mathops.h"
#elif ARCH_MIPS