diff --git a/sh4/ADDV Rm,Rn b/sh4/ADDV Rm,Rn
index 006385b..afac48b 100644
--- a/sh4/ADDV Rm,Rn	
+++ b/sh4/ADDV Rm,Rn	
@@ -2,6 +2,6 @@
 op1 ← SignExtend32(Rm);
 op2 ← SignExtend32(Rn);
 op2 ← op2 + op1;
-t ← INT ((op2 < (- 231)) OR (op2 ≥ 231));
+t ← INT ((op2 < (- (1 << 31))) OR (op2 ≥ (1 << 31)));
 Rn ← Register(op2);
 T ← Bit(t);
diff --git a/sh4/MAC.L @Rm+,@Rn+ b/sh4/MAC.L @Rm+,@Rn+
index 3b3b4a0..6677f92 100644
--- a/sh4/MAC.L @Rm+,@Rn+	
+++ b/sh4/MAC.L @Rm+,@Rn+	
@@ -21,9 +21,10 @@ result ← mac + mul;
 IF (s = 1)
 IF (((result ⊕ mac) ∧ (result ⊕ mul))< 63 FOR 1 > = 1)
 IF (mac< 63 FOR 1 > = 0)
-result ← 247 - 1;
+result ← (1 << 47) - 1;
+ELSE
+result ← - (1 << 47);
 ELSE
-ELSEresult ← - 247;
 result ← SignedSaturate48(result);
 macl ← result;
 mach ← result >> 32;
diff --git a/sh4/SUBV Rm,Rn b/sh4/SUBV Rm,Rn
index 3add34c..bcf5083 100644
--- a/sh4/SUBV Rm,Rn	
+++ b/sh4/SUBV Rm,Rn	
@@ -2,6 +2,6 @@
 op1 ← SignExtend32(Rm);
 op2 ← SignExtend32(Rn);
 op2 ← op2 - op1;
-t ← INT ((op2 < (- 231)) OR (op2 ≥ 231));
+t ← INT ((op2 < (- (1 << 31))) OR (op2 ≥ (1 << 31)));
 Rn ← Register(op2);
 T ← Bit(t);