SLABAD(3)      LAPACK routine of NEC Numeric Library Collection      SLABAD(3)



NAME
       SLABAD

SYNOPSIS
       SUBROUTINE SLABAD (SMALL, LARGE)



PURPOSE
            SLABAD 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 SLAMCH.  This subroutine is needed because
            SLAMCH does not compensate for poor arithmetic in the upper half of
            the exponent range, as is found on a Cray.




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

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



LAPACK routine                  31 October 2017                      SLABAD(3)