# p?lachkieee

Performs a simple check for the features of the IEEE standard. (C interface function).

## Syntax

void pslachkieee(int *isieee, float *rmax, float *rmin);

void pdlachkieee(int *isieee, float *rmax, float *rmin);

## Description

This routine performs a simple check to make sure that the features of the IEEE standard are implemented. In some implementations, p?lachkieee may not return.

Note that all arguments are call-by-reference so that this routine can be directly called from Fortran code.

This is a ScaLAPACK internal subroutine and arguments are not checked for unreasonable values.

## Input Parameters

rmax

  (local).

  REAL for pslachkieee

  DOUBLE PRECISION for pdlachkieee

  The overflow threshold`(= ?lamch ('O'))`.

rmin

  (local).

  REAL for pslachkieee

  DOUBLE PRECISION for pdlachkieee

  The underflow threshold`(= ?lamch ('U'))`.

## Output Parameters

isieee

  (local). INTEGER.

  On exit, `isieee = 1` implies that all the features of the IEEE standard that we rely on are implemented. On exit, `isieee = 0` implies that some the features of the IEEE standard that we rely on are missing.

Parent topic: Utility Functions and Routines