[Bug math/15470] New: On ARM llrintl() and llroundl() do not raise FE_INVALID with argument out of range

["gcc.hall at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15470

             Bug #: 15470
           Summary: On ARM llrintl() and llroundl() do not raise
                    FE_INVALID with argument out of range
           Product: glibc
           Version: 2.13
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: gcc.hall@gmail.com
    Classification: Unclassified


In the test program below, llrintl() and llroundl() do not raise FE_INVALID
when passed a number one larger than the maximum signed long long int.
The problem was found on ARM hf, it does not occur on x86. 
=======================================================================
#include <stdio.h>
#include <math.h>
#include <fenv.h>

int main( void )
{
  long long int result;
  long double x = 9223372036854775808.0L; // LLONG_MAX + 1.0
  printf( "x is %.20Lg\n", x );

  feclearexcept( FE_INVALID );

  result = llroundl( x );

  if( fetestexcept( FE_INVALID ) )
    printf( "FE_INVALID set\n" );
  else
    printf( "FE_INVALID not set!\n" );

  printf( "result is %lld\n", result );

 return 0;
}
====================================================================
Result:
x is 9223372036854775808
FE_INVALID not set!
result is -9223372036854775808

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