Bug 13927 - Wrong result of double cast conversion
Summary: Wrong result of double cast conversion
Status: RESOLVED FIXED
Alias: None
Product: Runtime
Classification: Mono
Component: JIT ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: ---
Assignee: Duncan Mak
URL:
Depends on:
Blocks:
 
Reported: 2013-08-12 13:10 UTC by Marek Safar
Modified: 2013-08-21 15:40 UTC (History)
6 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description Marek Safar 2013-08-12 13:10:11 UTC
using System;

class X
{
    public static void Main()
    {
        double d = double.NaN;
        int i = (int)(uint)d;
        Console.WriteLine (i);
    }
}

Mono on x86: -2147483648
.NET: 0
Comment 1 Zoltan Varga 2013-08-12 14:43:45 UTC
No idea why .net returns 0, (int)d is 0x80000000, so (uint)d should be the same.
Comment 2 Marek Safar 2013-08-13 15:56:51 UTC
No idea either but that break the compatibility.
Comment 3 Zoltan Varga 2013-08-16 13:49:24 UTC
Fixed in master cad5315ebf99f3ff2a36516f3a87df74691b126d.
Comment 4 Miguel de Icaza [MSFT] 2013-08-19 09:05:54 UTC
PJ, Duncan,

If we continue to use branched versions of Mono, we need to get this on the various places.
Comment 5 PJ 2013-08-21 12:17:57 UTC
cad5315ebf99f3ff2a36516f3a87df74691b126d is not in the current 3.2.2 release that was blessed on the 15th (before the fix). It's only in master right now.

We'll want it to be cherry-picked to mono-3-2 for the next 3.2.x release. 

If it needs to make it out in 3.2.2 let's make that decision ASAP, right now it's not making it.