lamch(3)                   Library Functions Manual                   lamch(3)

NAME
       lamch - lamch: machine parameters

SYNOPSIS
   Functions
       double precision function dlamch (cmach)
           DLAMCH
       real function slamch (cmach)
           SLAMCH

Detailed Description
Function Documentation
   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.

   real function slamch (character cmach)
       SLAMCH

       Purpose:


           !>
           !> SLAMCH determines single precision machine parameters.
           !>

       Parameters
           CMACH

           !>          CMACH is 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)
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 67 of file slamch.f.

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

LAPACK                          Version 3.12.0                        lamch(3)