X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-64-arch.h;h=10df5d85c779584592a69193255c5d77bb060026;hb=8a632c14b592472873cfb214239c9387bc1a1ced;hp=2085503d84c1700761963268de09f94819f867de;hpb=0b5119848b6b8713e473fa669356645747e11dbd;p=sbcl.git

diff --git a/src/runtime/x86-64-arch.h b/src/runtime/x86-64-arch.h
index 2085503..10df5d8 100644
--- a/src/runtime/x86-64-arch.h
+++ b/src/runtime/x86-64-arch.h
@@ -9,6 +9,8 @@
 #error genesis/config.h (or sbcl.h) must be included before this file
 #endif
 
+#include "interr.h"                     /* for declaration of lose() */
+
 #define ARCH_HAS_STACK_POINTER
 
 /* FIXME: Do we also want
@@ -26,11 +28,19 @@ get_spinlock(volatile lispobj *word,long value)
     if(*word==value)
         lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
     do {
+#if defined(LISP_FEATURE_DARWIN)
+        asm ("xor %0,%0\n\
+              lock/cmpxchg %1,%2"
+             : "=a" (rax)
+             : "r" (value), "m" (*word)
+             : "memory", "cc");
+#else
         asm ("xor %0,%0\n\
               lock cmpxchg %1,%2"
              : "=a" (rax)
              : "r" (value), "m" (*word)
              : "memory", "cc");
+#endif
     } while(rax!=0);
 #else
     *word=value;