X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-64-arch.h;h=baa5b8dbb13601537594852c988a8de98afdb6c5;hb=2e47ed527bdcb76cf5eb52f66cc08f4fb0a0041d;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..baa5b8d 100644
--- a/src/runtime/x86-64-arch.h
+++ b/src/runtime/x86-64-arch.h
@@ -26,11 +26,19 @@ 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;