mirror of
https://github.com/FFmpeg/FFmpeg.git
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80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
/*
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* simple math operations
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* Copyright (c) 2001, 2002 Fabrice Bellard
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* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> et al
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_PPC_MATHOPS_H
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#define AVCODEC_PPC_MATHOPS_H
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/common.h"
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#if HAVE_PPC4XX
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/* signed 16x16 -> 32 multiply add accumulate */
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#define MAC16(rt, ra, rb) \
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__asm__ ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
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/* signed 16x16 -> 32 multiply */
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#define MUL16(ra, rb) \
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({ int __rt; \
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__asm__ ("mullhw %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \
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__rt; })
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#endif
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#define MULH MULH
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static inline av_const int MULH(int a, int b){
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int r;
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__asm__ ("mulhw %0, %1, %2" : "=r"(r) : "r"(a), "r"(b));
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return r;
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}
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#if !ARCH_PPC64
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static inline av_const int64_t MAC64(int64_t d, int a, int b)
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{
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union { uint64_t x; unsigned hl[2]; } x = { d };
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int h, l;
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__asm__ ("mullw %3, %4, %5 \n\t"
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"mulhw %2, %4, %5 \n\t"
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"addc %1, %1, %3 \n\t"
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"adde %0, %0, %2 \n\t"
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: "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
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: "r"(a), "r"(b));
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return x.x;
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}
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#define MAC64(d, a, b) ((d) = MAC64(d, a, b))
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static inline av_const int64_t MLS64(int64_t d, int a, int b)
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{
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union { uint64_t x; unsigned hl[2]; } x = { d };
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int h, l;
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__asm__ ("mullw %3, %4, %5 \n\t"
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"mulhw %2, %4, %5 \n\t"
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"subfc %1, %3, %1 \n\t"
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"subfe %0, %2, %0 \n\t"
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: "+r"(x.hl[0]), "+r"(x.hl[1]), "=&r"(h), "=&r"(l)
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: "r"(a), "r"(b));
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return x.x;
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}
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#define MLS64(d, a, b) ((d) = MLS64(d, a, b))
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#endif
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#endif /* AVCODEC_PPC_MATHOPS_H */
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