slabad.f(3)

NAME
slabad.f -

SYNOPSIS

  Functions/Subroutines

subroutine slabad (SMALL, LARGE)
SLABAD

Function/Subroutine Documentation

  subroutine slabad (realSMALL, realLARGE)

SLABAD

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.

Parameters:
    SMALL

              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

              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.

Author:
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Date:
    November 2011

Definition at line 75 of file slabad.f.

Author

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