dlabad(3F)

NAME
     DLABAD - take as input the values computed by SLAMCH for underflow and
     overflow, 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 SLAMCH 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.