1 files changed, 2 insertions, 4 deletions
diff --git a/yjit/src/asm/arm64/opnd.rs b/yjit/src/asm/arm64/opnd.rs
index c89481fb03..52b2a84637 100644
--- a/yjit/src/asm/arm64/opnd.rs
+++ b/yjit/src/asm/arm64/opnd.rs
@@ -12,10 +12,8 @@ pub struct A64Reg
 }
 
 impl A64Reg {
-    pub fn sub_reg(&self, num_bits: u8) -> Self {
-        assert!(num_bits == 32 || num_bits == 64);
-        assert!(num_bits <= self.num_bits);
-
+    pub fn with_num_bits(&self, num_bits: u8) -> Self {
+        assert!(num_bits == 8 || num_bits == 16 || num_bits == 32 || num_bits == 64);
         Self { num_bits, reg_no: self.reg_no }
     }
 }