SLAMCH(3)

NAME
SLAMCH - single precision machine parameters

SYNOPSIS

REAL FUNCTION
    SLAMCH( CMACH )

CHARACTER
    CMACH

PURPOSE
SLAMCH determines single precision machine parameters.

ARGUMENTS

CMACH   (input) CHARACTER*1
    Specifies the value to be returned by SLAMCH:
    = 'E' or 'e', SLAMCH := eps
    = 'S' or 's , SLAMCH := sfmin
    = 'B' or 'b', SLAMCH := base
    = 'P' or 'p', SLAMCH := eps*base
    = 'N' or 'n', SLAMCH := t
    = 'R' or 'r', SLAMCH := rnd
    = 'M' or 'm', SLAMCH := emin
    = 'U' or 'u', SLAMCH := rmin
    = 'L' or 'l', SLAMCH := emax
    = 'O' or 'o', SLAMCH := rmax where

eps   = relative machine precision
    sfmin = safe minimum, such that 1/sfmin does not overflow base = base of the machine prec = eps*base t = number of (base) digits in the mantissa rnd = 1.0 when rounding occurs in addition, 0.0 otherwise emin = minimum exponent before (gradual) underflow rmin = underflow threshold - base**(emin-1) emax = largest exponent before overflow rmax = overflow threshold - (base**emax)*(1-eps)