Move emms_c() from libavcodec to libavutil.

libavcodec/dsputil.h

@@ -630,13 +630,6 @@ static inline int get_penalty_factor(int lambda, int lambda2, int type){
     }
 }
 
-/**
- * Empty mmx state.
- * this must be called between any dsp function and float/double code.
- * for example sin(); dsp->idct_put(); emms_c(); cos()
- */
-#define emms_c()
-
 void dsputil_init_alpha(DSPContext* c, AVCodecContext *avctx);
 void dsputil_init_arm(DSPContext* c, AVCodecContext *avctx);
 void dsputil_init_bfin(DSPContext* c, AVCodecContext *avctx);
@@ -654,18 +647,7 @@ void ff_intrax8dsp_init(DSPContext* c, AVCodecContext *avctx);
 void ff_mlp_init(DSPContext* c, AVCodecContext *avctx);
 void ff_mlp_init_x86(DSPContext* c, AVCodecContext *avctx);
 
-#if HAVE_MMX
-
-#undef emms_c
-
-static inline void emms(void)
-{
-    __asm__ volatile ("emms;":::"memory");
-}
-
-#define emms_c() emms()
-
-#elif ARCH_ARM
+#if ARCH_ARM
 
 #if HAVE_NEON
 #   define STRIDE_ALIGN 16

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 */