add RegRip +/- int
diff --git a/xbyak/xbyak.h b/xbyak/xbyak.h
index 42974e3..47494ef 100644
--- a/xbyak/xbyak.h
+++ b/xbyak/xbyak.h
@@ -617,6 +617,12 @@
 	const Label* label_;
 	bool isAddr_;
 	explicit RegRip(sint64 disp = 0, const Label* label = 0, bool isAddr = false) : disp_(disp), label_(label), isAddr_(isAddr) {}
+	friend const RegRip operator+(const RegRip& r, int disp) {
+		return RegRip(r.disp_ + disp, r.label_, r.isAddr_);
+	}
+	friend const RegRip operator-(const RegRip& r, int disp) {
+		return RegRip(r.disp_ - disp, r.label_, r.isAddr_);
+	}
 	friend const RegRip operator+(const RegRip& r, sint64 disp) {
 		return RegRip(r.disp_ + disp, r.label_, r.isAddr_);
 	}