Restrict CP0_PerfCnt to legal values.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3476 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-mips/op.c b/target-mips/op.c
index f29134567c30506e0065724bfe6923afc3c911ea..569c2f2a9b24070bc53dcbae6cbc95e241b09b8a 100644 (file)
--- a/target-mips/op.c
+++ b/target-mips/op.c
@@ -1971,7 +1971,7 @@ void op_mtc0_depc (void)
 
 void op_mtc0_performance0 (void)
 {
-    env->CP0_Performance0 = T0; /* XXX */
+    env->CP0_Performance0 = T0 & 0x000007ff;
     RETURN();
 }