| /* |
| * 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 |
| |
| #include "config.h" |
| #include "libavutil/common.h" |
| |
| #if ARCH_X86_32 |
| #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 |
| |
| #if HAVE_CMOV |
| /* median of 3 */ |
| #define mid_pred mid_pred |
| static inline av_const int mid_pred(int a, int b, int c) |
| { |
| int i=b; |
| __asm__ volatile( |
| "cmp %2, %1 \n\t" |
| "cmovg %1, %0 \n\t" |
| "cmovg %2, %1 \n\t" |
| "cmp %3, %1 \n\t" |
| "cmovl %3, %1 \n\t" |
| "cmp %1, %0 \n\t" |
| "cmovg %1, %0 \n\t" |
| :"+&r"(i), "+&r"(a) |
| :"r"(b), "r"(c) |
| ); |
| return i; |
| } |
| #endif |
| |
| #endif /* AVCODEC_X86_MATHOPS_H */ |