[pypy-commit] pypy ppc-jit-backend: Ensure exlusive usage of r0 in b_abs

[hager]

Author: hager <sven.hager at uni-duesseldorf.de>
Branch: ppc-jit-backend
Changeset: r50020:68ed886b303c
Date: 2011-11-30 17:53 +0100
http://bitbucket.org/pypy/pypy/changeset/68ed886b303c/

Log:	Ensure exlusive usage of r0 in b_abs

diff --git a/pypy/jit/backend/ppc/ppcgen/codebuilder.py b/pypy/jit/backend/ppc/ppcgen/codebuilder.py
--- a/pypy/jit/backend/ppc/ppcgen/codebuilder.py
+++ b/pypy/jit/backend/ppc/ppcgen/codebuilder.py
@@ -990,9 +990,12 @@
         target_ofs = offset - pos
         self.bc(condition, 2, target_ofs)
 
-    def b_abs(self, address):
-        self.load_imm(r.r0, address)
-        self.mtctr(0)
+    def b_abs(self, address, trap=False):
+        self.alloc_scratch_reg(address)
+        self.mtctr(r.r0.value)
+        self.free_scratch_reg()
+        if trap:
+            self.trap()
         self.bctr()
 
     def bl_abs(self, address):