nengel@2: /*
nengel@2:  * simple math operations
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_X86_MATHOPS_H
nengel@2: #define AVCODEC_X86_MATHOPS_H
nengel@2: 
nengel@2: #include "config.h"
nengel@2: #include "libavutil/common.h"
nengel@2: 
nengel@2: #if ARCH_X86_32
nengel@2: #define MULL(ra, rb, shift) \
nengel@2:         ({ int rt, dummy; __asm__ (\
nengel@2:             "imull %3               \n\t"\
nengel@2:             "shrdl %4, %%edx, %%eax \n\t"\
nengel@2:             : "=a"(rt), "=d"(dummy)\
nengel@2:             : "a" ((int)ra), "rm" ((int)rb), "i"(shift));\
nengel@2:          rt; })
nengel@2: 
nengel@2: #define MULH(ra, rb) \
nengel@2:     ({ int rt, dummy;\
nengel@2:      __asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)ra), "rm" ((int)rb));\
nengel@2:      rt; })
nengel@2: 
nengel@2: #define MUL64(ra, rb) \
nengel@2:     ({ int64_t rt;\
nengel@2:      __asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)ra), "g" ((int)rb));\
nengel@2:      rt; })
nengel@2: #endif
nengel@2: 
nengel@2: // avoid +32 for shift optimization (gcc should do that ...)
nengel@2: #define NEG_SSR32 NEG_SSR32
nengel@2: static inline  int32_t NEG_SSR32( int32_t a, int8_t s){
nengel@2:     __asm__ ("sarl %1, %0\n\t"
nengel@2:          : "+r" (a)
nengel@2:          : "ic" ((uint8_t)(-s))
nengel@2:     );
nengel@2:     return a;
nengel@2: }
nengel@2: 
nengel@2: #define NEG_USR32 NEG_USR32
nengel@2: static inline uint32_t NEG_USR32(uint32_t a, int8_t s){
nengel@2:     __asm__ ("shrl %1, %0\n\t"
nengel@2:          : "+r" (a)
nengel@2:          : "ic" ((uint8_t)(-s))
nengel@2:     );
nengel@2:     return a;
nengel@2: }
nengel@2: 
nengel@2: #endif /* AVCODEC_X86_MATHOPS_H */