add 3dnow support

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@478 b3059339-0415-0410-9bf9-f77b7e298cf2

libvo/fastmemcpy.h

@@ -1,3 +1,7 @@
+
+#ifndef __MPLAYER_MEMCPY
+#define __MPLAYER_MEMCPY
+
 /*
  This part of code was taken by from Linux-2.4.3 and slightly modified
 for MMX2 instruction set. I have done it since linux uses page aligned
@@ -5,7 +9,12 @@ blocks but mplayer uses weakly ordered data and original sources can not
 speedup their. Only using prefetchnta and movntq together have effect! 
 If you have questions please contact with me: Nick Kurshev: nickols_k@mail.ru.
 */
-#ifdef HAVE_MMX2
+
+// 3dnow memcpy support from kernel 2.4.2
+//  by Pontscho/fresh!mindworkz
+
+#if defined( HAVE_MMX2 ) || defined( HAVE_3DNOW )
+
 /* for small memory blocks (<256 bytes) this version is faster */
 #define small_memcpy(to,from,n)\
 {\
@@ -27,11 +36,19 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
 	  len&=63;
 	  
 	__asm__ __volatile__ (
+#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
+	        "prefetch (%0)\n"
+	        "prefetch 64(%0)\n"
+	        "prefetch 128(%0)\n"
+        	"prefetch 192(%0)\n"
+        	"prefetch 256(%0)\n"
+#else
 		"prefetchnta (%0)\n"
 		"prefetchnta 64(%0)\n"
 		"prefetchnta 128(%0)\n"
 		"prefetchnta 192(%0)\n"
 		"prefetchnta 256(%0)\n"
+#endif
 		: : "r" (from) );
         /*
            This algorithm is top effective when the code consequently
@@ -45,7 +62,11 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
 	for(; i>0; i--)
 	{
 		__asm__ __volatile__ (
+#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
+        	"prefetch 320(%0)\n"
+#else
 		"prefetchnta 320(%0)\n"
+#endif
 #ifdef HAVE_SSE /* Only P3 (may be Cyrix3) */
 		"movups (%0), %%xmm0\n"
 		"movups 16(%0), %%xmm1\n"
@@ -56,6 +77,24 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
 		"movntps %%xmm0, 32(%1)\n"
 		"movntps %%xmm1, 48(%1)\n"
 #else /* Only K7 (may be other) */
+#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
+        	"movq (%0), %%mm0\n"
+        	"movq 8(%0), %%mm1\n"
+        	"movq 16(%0), %%mm2\n"
+        	"movq 24(%0), %%mm3\n"
+        	"movq %%mm0, (%1)\n"
+        	"movq %%mm1, 8(%1)\n"
+        	"movq %%mm2, 16(%1)\n"
+        	"movq %%mm3, 24(%1)\n"
+        	"movq 32(%0), %%mm0\n"
+        	"movq 40(%0), %%mm1\n"
+        	"movq 48(%0), %%mm2\n"
+        	"movq 56(%0), %%mm3\n"
+        	"movq %%mm0, 32(%1)\n"
+        	"movq %%mm1, 40(%1)\n"
+        	"movq %%mm2, 48(%1)\n"
+        	"movq %%mm3, 56(%1)\n"
+#else
 		"movq (%0), %%mm0\n"
 		"movq 8(%0), %%mm1\n"
 		"movq 16(%0), %%mm2\n"
@@ -72,20 +111,41 @@ inline static void * fast_memcpy(void * to, const void * from, unsigned len)
 		"movntq %%mm1, 40(%1)\n"
 		"movntq %%mm2, 48(%1)\n"
 		"movntq %%mm3, 56(%1)\n"
+#endif
 #endif
 		:: "r" (from), "r" (to) : "memory");
 		from+=64;
 		to+=64;
 	}
+#if defined( HAVE_3DNOW ) && !defined( HAVE_MMX2 )
+		__asm__ __volatile__ ("femms":::"memory");
+#else
 		__asm__ __volatile__ ("emms":::"memory");
+#endif
 	}
 	/*
 	 *	Now do the tail of the block
 	 */
+#if 0
 	small_memcpy(to, from, len);
+#else
+        __asm__ __volatile__ (
+                "shrl $1,%%ecx\n"
+                "jnc 1f\n"
+                "movsb\n"
+                "1:\n"
+                "shrl $1,%%ecx\n"
+                "jnc 2f\n"
+                "movsw\n"
+                "2:\n"
+                "rep ; movsl\n"
+        	::"D" (to), "S" (from),"c" (len)
+        	: "memory");
+#endif
 	return p;
 }
 #define memcpy(a,b,c) fast_memcpy(a,b,c)
+
 #endif