INSTALL/dlamch.f(3)        Library Functions Manual        INSTALL/dlamch.f(3)

NAME
       INSTALL/dlamch.f

SYNOPSIS
   Functions/Subroutines
       double precision function dlamch (cmach)
           DLAMCH
       double precision function dlamc3 (a, b)
           DLAMC3

Function/Subroutine Documentation
   double precision function dlamc3 (double precision a, double precision b)
       DLAMC3 Purpose:

       !> DLAMC3  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.
       !>

       Author
           LAPACK is a software package provided by Univ. of Tennessee, Univ.
           of California Berkeley, Univ. of Colorado Denver and NAG Ltd..

       Parameters
           A

           !>          A is a DOUBLE PRECISION
           !>

           B

           !>          B is a DOUBLE PRECISION
           !>          The values A and B.
           !>

       Definition at line 171 of file dlamch.f.

   double precision function dlamch (character cmach)
       DLAMCH

       Purpose:


           !>
           !> DLAMCH determines double precision machine parameters.
           !>

       Parameters
           CMACH

           !>          CMACH is 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 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)
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 68 of file dlamch.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0             INSTALL/dlamch.f(3)