IEEECK(1) LAPACK auxiliary routine (version 3.2) IEEECK(1)NAME
IEEECK - is called from the ILAENV to verify that Infinity and possibly
NaN arithmetic is safe (i.e
SYNOPSIS
INTEGER FUNCTION IEEECK( ISPEC, ZERO, ONE )
INTEGER ISPEC
REAL ONE, ZERO
PURPOSE
IEEECK is called from the ILAENV to verify that Infinity and possibly
NaN arithmetic is safe (i.e. will not trap).
ARGUMENTS
ISPEC (input) 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 (input) REAL
Must contain the value 0.0 This is passed to prevent the com‐
piler from optimizing away this code.
ONE (input) REAL
Must contain the value 1.0 This is passed to prevent the com‐
piler from optimizing away this code. RETURN VALUE: INTEGER =
0: Arithmetic failed to produce the correct answers
= 1: Arithmetic produced the correct answers Return if we were
only asked to check infinity arithmetic
LAPACK auxiliary routine (versioNovember 2008 IEEECK(1)
