From e9735572113ab903b92cc0a7931eb894e7177f6e Mon Sep 17 00:00:00 2001
From: "Ronald S. Bultje" <rsbultje@gmail.com>
Date: Tue, 24 May 2011 13:04:38 -0400
Subject: Move emms_c() from libavcodec to libavutil.

---
 libavutil/internal.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'libavutil')

diff --git a/libavutil/internal.h b/libavutil/internal.h
index e890ae7083..51e449d3fe 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -223,4 +223,18 @@
 #   define ONLY_IF_THREADS_ENABLED(x) NULL
 #endif
 
+#if HAVE_MMX
+/**
+ * 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)
+{
+    __asm__ volatile ("emms" ::: "memory");
+}
+#else /* HAVE_MMX */
+#define emms_c()
+#endif /* HAVE_MMX */
+
 #endif /* AVUTIL_INTERNAL_H */
-- 
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