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