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