[Mono-bugs] [Bug 31673][Nor] New - shl opcode behaviour
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3 Oct 2002 08:32:24 -0000
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Changed by lupus@ximian.com.
http://bugzilla.ximian.com/show_bug.cgi?id=31673
--- shadow/31673 Thu Oct 3 04:32:24 2002
+++ shadow/31673.tmp.7157 Thu Oct 3 04:32:24 2002
@@ -0,0 +1,26 @@
+Bug#: 31673
+Product: Mono/MCS
+Version: unspecified
+OS: other
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Normal
+Component: Misc
+AssignedTo: mono-bugs@ximian.com
+ReportedBy: lupus@ximian.com
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: shl opcode behaviour
+
+With code like:
+ static int many_shifts (int a, int b, int c) {
+ return a << b << c << 1;
+ }
+mcs generates different code than csc.
+csc ANDs the right operand with 0x1f (I guess because shl has undefined
+behaviour with larger operands and maybe somewhere the C# spec specifies
+predictable results).