--- memprof-0.5.1/memintercept-utils.c	2002-08-13 21:23:30.000000000 +0200
+++ memintercept-utils.c	2005-06-19 16:46:49.000000000 +0200
@@ -264,7 +264,7 @@
 uint32_t
 mi_atomic_increment(uint32_t *addr)
 {
-#if defined (__GNUC__) && defined (__i386__)
+#if defined (__GNUC__) && (defined (__i386__) || defined (__amd64__))
 	uint32_t result;
 	__asm__ __volatile__("lock; xaddl %0, %1; incl %0"
 			     : "=r"(result), "=m"(*(addr))
@@ -279,7 +279,7 @@
 uint32_t
 mi_atomic_decrement(uint32_t *addr)
 {
-#if defined (__GNUC__) && defined (__i386__)
+#if defined (__GNUC__) && (defined (__i386__) || defined (__amd64__))
 	uint32_t result;
 	__asm__ __volatile__("lock; xaddl %0, %1; decl %0"
 			     : "=r"(result), "=m"(*(addr))