| /* |
| * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| * |
| * 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 AVUTIL_X86_TIMER_H |
| #define AVUTIL_X86_TIMER_H |
| |
| #include <stdint.h> |
| |
| #if HAVE_INLINE_ASM |
| |
| #define FF_TIMER_UNITS "decicycles" |
| #define AV_READ_TIME read_time |
| |
| static inline uint64_t read_time(void) |
| { |
| uint32_t a, d; |
| __asm__ volatile( |
| #if ARCH_X86_64 || defined(__SSE2__) |
| "lfence \n\t" |
| #endif |
| "rdtsc \n\t" |
| : "=a" (a), "=d" (d)); |
| return ((uint64_t)d << 32) + a; |
| } |
| |
| #elif HAVE_RDTSC |
| |
| #include <intrin.h> |
| #define AV_READ_TIME __rdtsc |
| |
| #endif /* HAVE_INLINE_ASM */ |
| |
| #endif /* AVUTIL_X86_TIMER_H */ |
