patch-2.4.20 linux-2.4.20/include/asm-x86_64/string.h
Next file: linux-2.4.20/include/asm-x86_64/system.h
Previous file: linux-2.4.20/include/asm-x86_64/statfs.h
Back to the patch index
Back to the overall index
- 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
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)