From: Frode Solheim <frode@fs-uae.net>
Date: Mon, 24 Aug 2015 18:57:41 +0000 (+0200)
Subject: Fix undefined behavior (shift count == bit length) when delay is 0
X-Git-Tag: 3200~98^2
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=085ec5626ca20f77944278c68edde2b0dea42697;p=francis%2Fwinuae.git

Fix undefined behavior (shift count == bit length) when delay is 0
---

diff --git a/custom.cpp b/custom.cpp
index 6f419def..9c2f5d4a 100644
--- a/custom.cpp
+++ b/custom.cpp
@@ -1943,6 +1943,7 @@ STATIC_INLINE void shift32plus (uae_u64 *p, int n)
 
 STATIC_INLINE void aga_shift (uae_u64 *p, int n)
 {
+	if (n == 0) return;
 	shift32plus (p, n);
 	p[0] <<= n;
 }
@@ -1957,6 +1958,7 @@ STATIC_INLINE void shift32plusn (uae_u64 *p, int n)
 
 STATIC_INLINE void aga_shift_n (uae_u64 *p, int n)
 {
+	if (n == 0) return;
 	shift32plusn (p, n);
 	p[1] >>= n;
 }