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dlabad examples
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Man Page Details
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NAME
       DLABAD  - a input the values computed by DLAMCH for underflow and over-
       flow, and returns the square root of each of these values if the log of
       LARGE is sufficiently large

SYNOPSIS
       SUBROUTINE DLABAD( SMALL, LARGE )

           DOUBLE         PRECISION LARGE, SMALL

PURPOSE
       DLABAD  takes  as input the values computed by DLAMCH for underflow and
       overflow, and returns the square root of each of these  values  if  the
       log  of  LARGE  is  sufficiently large.  This subroutine is intended to
       identify machines with a large exponent range, such as the  Crays,  and
       redefine  the  underflow  and overflow limits to be the square roots of
       the values computed by  DLAMCH.   This  subroutine  is  needed  because
       DLAMCH does not compensate for poor arithmetic in the upper half of the
       exponent range, as is found on a Cray.


ARGUMENTS
       SMALL   (input/output) DOUBLE PRECISION
               On entry, the underflow threshold as computed  by  DLAMCH.   On
               exit, if LOG10(LARGE) is sufficiently large, the square root of
               SMALL, otherwise unchanged.

       LARGE   (input/output) DOUBLE PRECISION
               On entry, the overflow threshold as  computed  by  DLAMCH.   On
               exit, if LOG10(LARGE) is sufficiently large, the square root of
               LARGE, otherwise unchanged.

