NAME

       ieeeck.f -

SYNOPSIS

   Functions/Subroutines
       integer function ieeeck (ISPEC, ZERO, ONE)
           IEEECK

Function/Subroutine Documentation

   integer function ieeeck (integerISPEC, realZERO, realONE)
       IEEECK

       Purpose:

            IEEECK is called from the ILAENV to verify that Infinity and
            possibly NaN arithmetic is safe (i.e. will not trap).

       Parameters:
           ISPEC

                     ISPEC is INTEGER
                     Specifies whether to test just for inifinity arithmetic
                     or whether to test for infinity and NaN arithmetic.
                     = 0: Verify infinity arithmetic only.
                     = 1: Verify infinity and NaN arithmetic.

           ZERO

                     ZERO is REAL
                     Must contain the value 0.0
                     This is passed to prevent the compiler from optimizing
                     away this code.

           ONE

                     ONE is REAL
                     Must contain the value 1.0
                     This is passed to prevent the compiler from optimizing
                     away this code.

             RETURN VALUE:  INTEGER
                     = 0:  Arithmetic failed to produce the correct answers
                     = 1:  Arithmetic produced the correct answers

       Author:
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Date:
           November 2011

       Definition at line 83 of file ieeeck.f.

Author

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