dlamch man page on YellowDog

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DLAMCH(l)			       )			     DLAMCH(l)

NAME
       DLAMCH - determine double precision machine parameters

SYNOPSIS
       DOUBLE PRECISION FUNCTION DLAMCH( CMACH )

	   CHARACTER	CMACH

PURPOSE
       DLAMCH determines double precision machine parameters.

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

LAPACK version 3.0		 15 June 2000			     DLAMCH(l)
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