X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=arch_x86.h;h=cc3ab012c557f38db5df6c7b5c829a13ceaf511a;hp=e899684b56ddc50b9c43b506e6cb3ccdd6f254d0;hb=0114ba7f23f86623c237baeb28ec8e4b39b9bb84;hpb=3162dfe1928d4d6bf857f8e9e1c814eb8a994a0d

diff --git a/arch_x86.h b/arch_x86.h
index e899684..cc3ab01 100644
--- a/arch_x86.h
+++ b/arch_x86.h
@@ -23,6 +23,7 @@
  */
 
 #include <compiler.h>
+#include <arch_atomic.h>
 
 /* Assume P4 or newer */
 #define CONFIG_HAVE_FENCE 1
@@ -94,56 +95,6 @@ static inline void cpu_relax(void)
 	rep_nop();
 }
 
-#define xchg(ptr, v)	\
-	((__typeof__(*(ptr)))__xchg((ptr), (unsigned long)(v), sizeof(*(ptr))))
-
-struct __xchg_ptr_as_array {
-	unsigned long a[100];
-};
-
-#define __xchg_ptr_as_array(x) ((struct __xchg_ptr_as_array *)(x))
-
-/*
- * xchg always implies a "lock" prefix, even on UP. See Intel documentation.
- * volatile attribute is neccessary due to xchg side effect.
- * *ptr is an output argument.
- * x is considered local, ptr is considered remote.
- */
-static inline unsigned long __xchg(volatile void *ptr, unsigned long x,
-				   int size)
-{
-	switch (size) {
-	case 1:
-		asm volatile("xchgb %b0,%1"
-			     : "=q" (x)
-			     : "m" (*__xchg_ptr_as_array(ptr)), "0" (x)
-			     : "memory");
-		break;
-	case 2:
-		asm volatile("xchgw %w0,%1"
-			     : "=r" (x)
-			     : "m" (*__xchg_ptr_as_array(ptr)), "0" (x)
-			     : "memory");
-		break;
-	case 4:
-		asm volatile("xchgl %k0,%1"
-			     : "=r" (x)
-			     : "m" (*__xchg_ptr_as_array(ptr)), "0" (x)
-			     : "memory");
-		break;
-#if (BITS_PER_LONG == 64)
-	case 8:
-		asm volatile("xchgq %0,%1"
-			     : "=r" (x)
-			     : "m" (*__xchg_ptr_as_array(ptr)), "0" (x)
-			     : "memory");
-		break;
-#endif
-	}
-	smp_wmc();
-	return x;
-}
-
 #define rdtscll(val)							  \
 	do {						  		  \
 	     unsigned int __a, __d;					  \