yading@11: /*
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVUTIL_X86_EMMS_H
yading@11: #define AVUTIL_X86_EMMS_H
yading@11: 
yading@11: #include "config.h"
yading@11: #include "libavutil/attributes.h"
yading@11: #include "libavutil/cpu.h"
yading@11: 
yading@11: void avpriv_emms_yasm(void);
yading@11: 
yading@11: #if HAVE_MMX_INLINE
yading@11: #   define emms_c emms_c
yading@11: /**
yading@11:  * Empty mmx state.
yading@11:  * this must be called between any dsp function and float/double code.
yading@11:  * for example sin(); dsp->idct_put(); emms_c(); cos()
yading@11:  */
yading@11: static av_always_inline void emms_c(void)
yading@11: {
yading@11:     if(av_get_cpu_flags() & AV_CPU_FLAG_MMX)
yading@11:         __asm__ volatile ("emms" ::: "memory");
yading@11: }
yading@11: #elif HAVE_MMX && HAVE_MM_EMPTY
yading@11: #   include <mmintrin.h>
yading@11: #   define emms_c _mm_empty
yading@11: #elif HAVE_MMX_EXTERNAL
yading@11: #   define emms_c avpriv_emms_yasm
yading@11: #endif /* HAVE_MMX_INLINE */
yading@11: 
yading@11: #endif /* AVUTIL_X86_EMMS_H */