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1 99aed7c8 Luca Barbato
/*
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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 Libav.
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 *
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 * Libav 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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 * Libav 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 Libav; 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 */