# ieeeck.f man page

ieeeck.f —

## Synopsis

### Functions/Subroutines

INTEGER functionieeeck(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

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

ieeeck(3) is an alias of ieeeck.f(3).

Sat Nov 16 2013 Version 3.4.2 LAPACK