Changeset 4940

Timestamp:

Aug 8, 2006, 12:05:32 PM (18 years ago)

Author:

Gary Byers

Message:

Darwin assembler doesn't like lock instructions on the same line as
the locked instruction. (Maybe there's a better way to do this, than
just pretending that lock is a standalone instruction, but that lock
instruction does seem to be treated as a prefix.)

File:

• trunk/ccl/lisp-kernel/x86-asmutils64.s (modified) (3 diffs)

trunk/ccl/lisp-kernel/x86-asmutils64.s

@@ -71 +71 @@
 _exportfn(C(store_conditional))
         __(mov %rsi,%rax)
-        __(lock cmpxchgq %rdx,(%rdi))
+        __(lock) 
+        __(cmpxchgq %rdx,(%rdi))
         __(cmovne %rdx,%rax)
         __(ret) 
@@ -80 +81 @@
 
 _exportfn(C(atomic_swap))
-        __(lock xchg %rsi,(%rdi))
+        __(lock) 
+        __(xchg %rsi,(%rdi))
         __(mov %rsi,%rax)
         __(ret)
@@ -92 +94 @@
         __(movq %rax,%rcx)
         __(orq %rsi,%rcx)
-        __(lock cmpxchg %rcx,(%rdi))
+        __(lock)
+        __(cmpxchg %rcx,(%rdi))
         __(jnz 0b)
         __(andq %rsi,%rax)