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RedHat 9 (Linux i386) - man page for dlabad (redhat section l)

DLABAD(l)					)					DLABAD(l)

NAME
       DLABAD  -  take	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

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.

LAPACK version 3.0			   15 June 2000 				DLABAD(l)


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