NAME

       slamchf77.f -

SYNOPSIS

   Functions/Subroutines
       real function slamch (CMACH)
           SLAMCH
       subroutine slamc1 (BETA, T, RND, IEEE1)
           SLAMC1
       subroutine slamc2 (BETA, T, RND, EPS, EMIN, RMIN, EMAX, RMAX)
           SLAMC2
       real function slamc3 (A, B)
           SLAMC3
       subroutine slamc4 (EMIN, START, BASE)
           SLAMC4
       subroutine slamc5 (BETA, P, EMIN, IEEE, EMAX, RMAX)
           SLAMC5

Function/Subroutine Documentation

   real function slamc3 (real A, real B)
       SLAMC3 Purpose:

        SLAMC3  is intended to force  A  and  B  to be stored prior to doing
        the addition of  A  and  B ,  for use in situations where optimizers
        might hold one of these in a register.

       Parameters:
           A
           B

                     The values A and B.

   subroutine slamc4 (integer EMIN, real START, integer BASE)
       SLAMC4 Purpose:

        SLAMC4 is a service routine for SLAMC2.

       Parameters:
           EMIN

                     The minimum exponent before (gradual) underflow, computed by
                     setting A = START and dividing by BASE until the previous A
                     can not be recovered.

           START

                     The starting point for determining EMIN.

           BASE

                     The base of the machine.

   subroutine slamc5 (integer BETA, integer P, integer EMIN, logical IEEE, integer EMAX, real
       RMAX)
       SLAMC5 Purpose:

        SLAMC5 attempts to compute RMAX, the largest machine floating-point
        number, without overflow.  It assumes that EMAX + abs(EMIN) sum
        approximately to a power of 2.  It will fail on machines where this
        assumption does not hold, for example, the Cyber 205 (EMIN = -28625,
        EMAX = 28718).  It will also fail if the value supplied for EMIN is
        too large (i.e. too close to zero), probably with overflow.

       Parameters:
           BETA

                     The base of floating-point arithmetic.

           P

                     The number of base BETA digits in the mantissa of a
                     floating-point value.

           EMIN

                     The minimum exponent before (gradual) underflow.

           IEEE

                     A logical flag specifying whether or not the arithmetic
                     system is thought to comply with the IEEE standard.

           EMAX

                     The largest exponent before overflow

           RMAX

                     The largest machine floating-point number.

Author

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