From: Kai Backman <kaib@golang.org>
Date: Fri, 3 Jul 2009 05:05:06 +0000 (-0700)
Subject: sys.cas for mutex
X-Git-Tag: weekly.2009-11-06~1269
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=84ded32817e368dc3dd3a2527ecbf94bdd853d14;p=gostls13.git

sys.cas for mutex

R=rsc
APPROVED=rsc
DELTA=28  (28 added, 0 deleted, 0 changed)
OCL=31128
CL=31130
---

diff --git a/src/pkg/sync/asm_arm.s b/src/pkg/sync/asm_arm.s
new file mode 100644
index 0000000000..a6ad9d949c
--- /dev/null
+++ b/src/pkg/sync/asm_arm.s
@@ -0,0 +1,14 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// func cas(val *int32, old, new int32) bool
+// Atomically:
+//	if *val == old {
+//		*val = new;
+//		return true;
+//	}else
+//		return false;
+
+TEXT	sync·cas+0(SB),0,$12
+	TODO