Man page - ieeeck(3)

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Manual

ieeeck

NAME
SYNOPSIS
Functions
Detailed Description
Function Documentation
integer function ieeeck (integer ispec, real zero, real one)
Author

NAME

ieeeck - ieeeck: verify inf and NaN are safe

SYNOPSIS

Functions

integer function ieeeck (ispec, zero, one)
IEEECK

Detailed Description

Function Documentation

integer function ieeeck (integer ispec, real zero, real one)

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 infinity 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.

Author

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