diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/armv4l/mathops.h')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/armv4l/mathops.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/armv4l/mathops.h b/contrib/ffmpeg/libavcodec/armv4l/mathops.h new file mode 100644 index 000000000..7ddd0ec6e --- /dev/null +++ b/contrib/ffmpeg/libavcodec/armv4l/mathops.h @@ -0,0 +1,49 @@ +/* + * 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 + */ + +#ifdef FRAC_BITS +# define MULL(a, b) \ + ({ int lo, hi;\ + asm("smull %0, %1, %2, %3 \n\t"\ + "mov %0, %0, lsr %4\n\t"\ + "add %1, %0, %1, lsl %5\n\t"\ + : "=&r"(lo), "=&r"(hi)\ + : "r"(b), "r"(a), "i"(FRAC_BITS), "i"(32-FRAC_BITS));\ + hi; }) +#endif + +#define MULH(a, b) \ + ({ int lo, hi;\ + asm ("smull %0, %1, %2, %3" : "=&r"(lo), "=&r"(hi) : "r"(b), "r"(a));\ + hi; }) + +#if defined(HAVE_ARMV5TE) + +/* signed 16x16 -> 32 multiply add accumulate */ +# define MAC16(rt, ra, rb) \ + asm ("smlabb %0, %2, %3, %0" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb)); +/* signed 16x16 -> 32 multiply */ +# define MUL16(ra, rb) \ + ({ int __rt; \ + asm ("smulbb %0, %1, %2" : "=r" (__rt) : "r" (ra), "r" (rb)); \ + __rt; }) + +#endif |