[pypy-commit] pypy default: While we're at it, this DMB wait instruction is only needed if EQ.

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r73206:622f29ad42ab
Date: 2014-08-30 13:43 +0200
http://bitbucket.org/pypy/pypy/changeset/622f29ad42ab/

Log:	While we're at it, this DMB wait instruction is only needed if EQ.

diff --git a/rpython/jit/backend/arm/callbuilder.py b/rpython/jit/backend/arm/callbuilder.py
--- a/rpython/jit/backend/arm/callbuilder.py
+++ b/rpython/jit/backend/arm/callbuilder.py
@@ -114,7 +114,7 @@
         self.mc.STREX(r.r3.value, r.ip.value, r.r6.value, c=c.EQ)
                                                  # try to claim the lock
         self.mc.CMP_ri(r.r3.value, 0, cond=c.EQ) # did this succeed?
-        self.mc.DMB()
+        self.mc.DMB(c=c.EQ)
         # the success of the lock acquisition is defined by
         # 'EQ is true', or equivalently by 'r3 == 0'.
         #