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 compiler from optimizing away this code.
- ONE (input) 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 Return if we were only asked to check infinity arithmetic