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- /*
- * 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_EMMS_H
- #define AVUTIL_X86_EMMS_H
- #include "config.h"
- #include "libavutil/attributes.h"
- #include "libavutil/cpu.h"
- void avpriv_emms_yasm(void);
- #if HAVE_MMX_INLINE
- # define emms_c emms_c
- /**
- * Empty mmx state.
- * this must be called between any dsp function and float/double code.
- * for example sin(); dsp->idct_put(); emms_c(); cos()
- */
- static av_always_inline void emms_c(void)
- {
- if(av_get_cpu_flags() & AV_CPU_FLAG_MMX)
- __asm__ volatile ("emms" ::: "memory");
- }
- #elif HAVE_MMX && HAVE_MM_EMPTY
- # include <mmintrin.h>
- # define emms_c _mm_empty
- #elif HAVE_MMX_EXTERNAL
- # define emms_c avpriv_emms_yasm
- #endif /* HAVE_MMX_INLINE */
- #endif /* AVUTIL_X86_EMMS_H */
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