https://bugzilla.novell.com/show_bug.cgi?id=668905
https://bugzilla.novell.com/show_bug.cgi?id=668905#c0 Summary: ARM: converting decimal to float produces garbage Classification: Mono Product: Mono: Runtime Version: 2.8.x Platform: Other OS/Version: Linux Status: NEW Severity: Normal Priority: P5 - None Component: JIT AssignedTo: [email protected] ReportedBy: [email protected] QAContact: [email protected] Found By: --- Blocker: --- Description of Problem: Converting a "decimal" value to a "float" value using Mono 2.8.2 (and 2.6.7) on ARM, using either a cast or Convert.ToSingle, results in a garbage value. This problem does not occur with Mono on x86. Steps to reproduce the problem: Compile and run this test case. -------- using System; namespace foo { class bar { public static void Main() { decimal d = 0; double dd = Convert.ToDouble(d); float f = Convert.ToSingle(d); float ff = Convert.ToSingle(dd); byte[] fbytes = BitConverter.GetBytes(f); Console.WriteLine("d = {0} dd = {1} f = {2} ff = {3}", d, dd, f, ff); Console.Write("bytes = "); foreach(byte b in fbytes) Console.Write("{0:x2}", b); Console.WriteLine(); if (f != ff) Console.WriteLine("Error!"); } } } ------- Actual Results: d = 0 dd = 0 f = 3.198151E+09 ff = 0 bytes = e89f3e4f Error! (The exact value of f is different each time you run the program) Expected Results: d = 0 dd = 0 f = 0 ff = 0 bytes = 00000000 How often does this happen? Consistently Additional Information: This is Mono 2.8.2, built by me from the source tarball, running on a Beagleboard with a TI DM3730 ARM processor, using Debian 6 testing. Mono version information is as follows: root@bbtest:~# mono -V Mono JIT compiler version 2.8.2 (tarball Tue Feb 1 22:21:37 UTC 2011) Copyright (C) 2002-2010 Novell, Inc and Contributors. www.mono-project.com TLS: __thread SIGSEGV: normal Notifications: epoll Architecture: armel,soft-float Disabled: none Misc: softdebug LLVM: supported, not enabled. GC: Included Boehm (with typed GC and Parallel Mark) The problem also occurs with Mono 2.6.7 as shipped by Debian. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug. _______________________________________________ mono-bugs maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-bugs
