patch-2.4.20 linux-2.4.20/include/asm-x86_64/string.h

• Lines: 53
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/include/asm-x86_64/string.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/include/asm-x86_64/string.h linux-2.4.20/include/asm-x86_64/string.h
@@ -0,0 +1,52 @@
+#ifndef _X86_64_STRING_H_
+#define _X86_64_STRING_H_
+
+#ifdef __KERNEL__
+
+#define struct_cpy(x,y) (*(x)=*(y))
+
+/* Written 2002 by Andi Kleen */ 
+
+/* Only used for special circumstances. Stolen from i386/string.h */ 
+static inline void * __inline_memcpy(void * to, const void * from, size_t n)
+{
+unsigned long d0, d1, d2;
+__asm__ __volatile__(
+	"rep ; movsl\n\t"
+	"testb $2,%b4\n\t"
+	"je 1f\n\t"
+	"movsw\n"
+	"1:\ttestb $1,%b4\n\t"
+	"je 2f\n\t"
+	"movsb\n"
+	"2:"
+	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
+	:"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
+	: "memory");
+return (to);
+}
+
+/* Even with __builtin_ the compiler may decide to use the out of line
+   function. */
+
+#define __HAVE_ARCH_MEMCPY 1
+extern void *__memcpy(void *to, const void *from, size_t len); 
+#define memcpy(dst,src,len) \
+	({ size_t __len = (len);				\
+	   void *__ret;						\
+	   if (__builtin_constant_p(len) && __len >= 64)	\
+		 __ret = __memcpy((dst),(src),__len);		\
+	   else							\
+		 __ret = __builtin_memcpy((dst),(src),__len);	\
+	   __ret; }) 
+
+
+#define __HAVE_ARCH_MEMSET
+#define memset __builtin_memset
+
+#define __HAVE_ARCH_MEMMOVE
+void * memmove(void * dest,const void *src,size_t count);
+
+#endif /* __KERNEL__ */
+
+#endif