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Date: Tue, 01 May 2012 19:19:10 +0100
From: David Matthews <dm AT prolingua DOT co DOT uk>
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To: cygwin AT cygwin DOT com
Subject: fesetround problem
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fesetround seems to be broken in the current version of Cygwin.  It 
returns EINVAL for any argument other than FE_TONEAREST.  The following 
snippet works fine on Debian wheezy but shows a non-zero return in Cygwin.

#include <fenv.h>
#include <stdio.h>

int main()
{
     int r = fesetround(FE_TOWARDZERO);
     printf("fesetround returned %d.  Current rounding is %d\n",
            r, fegetround());
     return 0;
}

Browsing the CVS source it looks as though the problem is the line in 
fesetround in fenv.c that says:

   if (round & ~(FE_CW_ROUND_MASK >> FE_CW_PREC_SHIFT))

I think FE_CW_PREC_SHIFT should be FE_CW_ROUND_SHIFT to match fegetround 
above.

David

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