diff --git a/postproc/rgb2rgb_template.c b/postproc/rgb2rgb_template.c
index acb53ea4aa..eda2ccc83a 100644
--- a/postproc/rgb2rgb_template.c
+++ b/postproc/rgb2rgb_template.c
@@ -1576,6 +1576,44 @@ static inline void RENAME(yuvPlanartouyvy)(const uint8_t *ysrc, const uint8_t *u
 	const unsigned chromWidth= width>>1;
 	for(y=0; y<height; y++)
 	{
+#ifdef HAVE_MMX
+//FIXME handle 2 lines a once (fewer prefetch, reuse some chrom, but very likely limited by mem anyway)
+		asm volatile(
+			"xorl %%eax, %%eax		\n\t"
+			".balign 16			\n\t"
+			"1:				\n\t"
+			PREFETCH" 32(%1, %%eax, 2)	\n\t"
+			PREFETCH" 32(%2, %%eax)		\n\t"
+			PREFETCH" 32(%3, %%eax)		\n\t"
+			"movq (%2, %%eax), %%mm0	\n\t" // U(0)
+			"movq %%mm0, %%mm2		\n\t" // U(0)
+			"movq (%3, %%eax), %%mm1	\n\t" // V(0)
+			"punpcklbw %%mm1, %%mm0		\n\t" // UVUV UVUV(0)
+			"punpckhbw %%mm1, %%mm2		\n\t" // UVUV UVUV(8)
+
+			"movq (%1, %%eax,2), %%mm3	\n\t" // Y(0)
+			"movq 8(%1, %%eax,2), %%mm5	\n\t" // Y(8)
+			"movq %%mm0, %%mm4		\n\t" // Y(0)
+			"movq %%mm2, %%mm6		\n\t" // Y(8)
+			"punpcklbw %%mm3, %%mm0		\n\t" // YUYV YUYV(0)
+			"punpckhbw %%mm3, %%mm4		\n\t" // YUYV YUYV(4)
+			"punpcklbw %%mm5, %%mm2		\n\t" // YUYV YUYV(8)
+			"punpckhbw %%mm5, %%mm6		\n\t" // YUYV YUYV(12)
+
+			MOVNTQ" %%mm0, (%0, %%eax, 4)	\n\t"
+			MOVNTQ" %%mm4, 8(%0, %%eax, 4)	\n\t"
+			MOVNTQ" %%mm2, 16(%0, %%eax, 4)	\n\t"
+			MOVNTQ" %%mm6, 24(%0, %%eax, 4)	\n\t"
+
+			"addl $8, %%eax			\n\t"
+			"cmpl %4, %%eax			\n\t"
+			" jb 1b				\n\t"
+			::"r"(dst), "r"(ysrc), "r"(usrc), "r"(vsrc), "g" (chromWidth)
+			: "%eax"
+		);
+#else
+//FIXME adapt the alpha asm code from yv12->yuy2
+
 #if __WORDSIZE >= 64
 		int i;
 		uint64_t *ldst = (uint64_t *) dst;
@@ -1602,6 +1640,7 @@ static inline void RENAME(yuvPlanartouyvy)(const uint8_t *ysrc, const uint8_t *u
 			uc++;
 			vc++;
 		}
+#endif
 #endif
 		if((y&(vertLumPerChroma-1))==(vertLumPerChroma-1) )
 		{
@@ -1611,6 +1650,11 @@ static inline void RENAME(yuvPlanartouyvy)(const uint8_t *ysrc, const uint8_t *u
 		ysrc += lumStride;
 		dst += dstStride;
 	}
+#ifdef HAVE_MMX
+asm(    EMMS" \n\t"
+        SFENCE" \n\t"
+        :::"memory");
+#endif
 }
 
 /**