aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* simple math operations
* Copyright (c) 2001, 2002 Fabrice Bellard
* 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_PPC_MATHOPS_H
#define AVCODEC_PPC_MATHOPS_H
#include <stdint.h>
#include "config.h"
#include "libavutil/common.h"
#if HAVE_PPC4XX
/* signed 16x16 -> 32 multiply add accumulate */
#define MAC16(rt, ra, rb) \
__asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
/* signed 16x16 -> 32 multiply */
#define MUL16(ra, rb) \
({ int __rt; \
__asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
__rt; })
#endif
#define MULH MULH
static inline av_const int MULH(int a, int b){
int r;
__asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
return r;
}
#if !ARCH_PPC64
static inline av_const int64_t MAC64(int64_t d, int a, int b)
{
union { uint64_t x; unsigned hl[2]; } x = { d };
int h, l;
__asm__ ("mullw %3, %4, %5 \n\t"
"mulhw %2, %4, %5 \n\t"
"addc %1, %1, %3 \n\t"
"adde %0, %0, %2 \n\t"
: "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
: "r"(a), "r"(b));
return x.x;
}
#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
static inline av_const int64_t MLS64(int64_t d, int a, int b)
{
union { uint64_t x; unsigned hl[2]; } x = { d };
int h, l;
__asm__ ("mullw %3, %4, %5 \n\t"
"mulhw %2, %4, %5 \n\t"
"subfc %1, %3, %1 \n\t"
"subfe %0, %2, %0 \n\t"
: "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
: "r"(a), "r"(b));
return x.x;
}
#define MLS64(d, a, b) ((d) = MLS64(d, a, b))
#endif
#endif /* AVCODEC_PPC_MATHOPS_H */
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