diff options
Diffstat (limited to 'libavcodec/x86/mathops.h')
-rw-r--r-- | libavcodec/x86/mathops.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/libavcodec/x86/mathops.h b/libavcodec/x86/mathops.h new file mode 100644 index 0000000000..95377acab8 --- /dev/null +++ b/libavcodec/x86/mathops.h @@ -0,0 +1,43 @@ +/* + * simple math operations + * 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_X86_MATHOPS_H +#define AVCODEC_X86_MATHOPS_H + +#define MULL(ra, rb, shift) \ + ({ int rt, dummy; __asm__ (\ + "imull %3 \n\t"\ + "shrdl %4, %%edx, %%eax \n\t"\ + : "=a"(rt), "=d"(dummy)\ + : "a" ((int)ra), "rm" ((int)rb), "i"(shift));\ + rt; }) + +#define MULH(ra, rb) \ + ({ int rt, dummy;\ + __asm__ ("imull %3\n\t" : "=d"(rt), "=a"(dummy): "a" ((int)ra), "rm" ((int)rb));\ + rt; }) + +#define MUL64(ra, rb) \ + ({ int64_t rt;\ + __asm__ ("imull %2\n\t" : "=A"(rt) : "a" ((int)ra), "g" ((int)rb));\ + rt; }) + +#endif /* AVCODEC_X86_MATHOPS_H */ |