diff --git a/core/hw/sh4/dyna/shil.h b/core/hw/sh4/dyna/shil.h
index 92d8133ad..651aad592 100644
--- a/core/hw/sh4/dyna/shil.h
+++ b/core/hw/sh4/dyna/shil.h
@@ -118,9 +118,11 @@ struct shil_param
 	bool is_imm_u16() const { return is_imm() && is_u16(_imm); }
 
 	u32* reg_ptr()  const { verify(is_reg()); return GetRegPtr(_reg); }
-	s32  reg_nofs()  const { verify(is_reg()); return (u8*)GetRegPtr(_reg) - (u8*)GetRegPtr(reg_xf_0)-sizeof(Sh4cntx); }
+	s32  reg_nofs()  const { verify(is_reg()); return (s32)((u8*)GetRegPtr(_reg) - (u8*)GetRegPtr(reg_xf_0)-sizeof(Sh4cntx)); }
 	u32  reg_aofs()  const { return -reg_nofs(); }
 
+	u32 imm_value() { verify(is_imm()); return _imm; }
+
 	bool is_vector() const { return type>=FMT_VECTOR_BASE; }
 
 	u32 count() const { return  type==FMT_F64?2:type==FMT_V2?2: