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-rw-r--r--target-mips/op.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/target-mips/op.c b/target-mips/op.c
index f29134567c..569c2f2a9b 100644
--- 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();
}