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<TITLE> [Mono-bugs] [Bug 39314][Nor] New - incorrect opcodes for some fp comparisons
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<H1>[Mono-bugs] [Bug 39314][Nor] New - incorrect opcodes for some fp comparisons
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<B>bugzilla-daemon@rocky.ximian.com
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<A HREF="mailto:bugzilla-daemon%40rocky.ximian.com"
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TITLE="[Mono-bugs] [Bug 39314][Nor] New - incorrect opcodes for some fp comparisons">bugzilla-daemon@rocky.ximian.com
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<I>Fri, 7 Mar 2003 12:17:11 -0500 (EST)</I>
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<P><UL>
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<!--beginarticle-->
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<PRE>Please do not reply to this email- if you want to comment on the bug, go to the
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URL shown below and enter your comments there.
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Changed by <A HREF="mailto:lupus@ximian.com.">lupus@ximian.com.</A>
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<A HREF="http://bugzilla.ximian.com/show_bug.cgi?id=39314">http://bugzilla.ximian.com/show_bug.cgi?id=39314</A>
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--- shadow/39314 Fri Mar 7 12:17:11 2003
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+++ shadow/39314.tmp.25504 Fri Mar 7 12:17:11 2003
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@@ -0,0 +1,47 @@
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+Bug#: 39314
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+Product: Mono/MCS
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+Version: unspecified
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+OS: other
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+OS Details:
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+Status: NEW
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+Resolution:
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+Severity:
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+Priority: Normal
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+Component: Misc
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+AssignedTo: <A HREF="mailto:mono-bugs@ximian.com">mono-bugs@ximian.com</A>
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+ReportedBy: <A HREF="mailto:lupus@ximian.com">lupus@ximian.com</A>
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+QAContact: <A HREF="mailto:mono-bugs@ximian.com">mono-bugs@ximian.com</A>
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+TargetMilestone: ---
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+URL:
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+Cc:
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+Summary: incorrect opcodes for some fp comparisons
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+
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+mcs generates the following code to implement bool val = a <= a:
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+ IL_0052: ldloc.0
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+ IL_0053: ldloc.0
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+ IL_0054: cgt
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+ IL_0056: ldc.i4.0
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+ IL_0057: ceq
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+while cvs generates:
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+ IL_004d: ldstr "NAN <= NAN: {0}"
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+ IL_0052: ldloc.0
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+ IL_0053: ldloc.0
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+ IL_0054: cgt.un
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+ IL_0056: ldc.i4.0
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+ IL_0057: ceq
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+and for bool val = a >= a:
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+ IL_0068: ldloc.0
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+ IL_0069: ldloc.0
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+ IL_006a: clt
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+ IL_006c: ldc.i4.1
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+ IL_006d: sub
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+versus the csc output:
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+ IL_0068: ldloc.0
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+ IL_0069: ldloc.0
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+ IL_006a: clt.un
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+ IL_006c: ldc.i4.0
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+ IL_006d: ceq
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+
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+Attached a fairly complete test case.
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+You can compare the opcodes generated or run the program with either mini
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+or the MS runtime to check for the correctness of the generated code.
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</PRE>
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