1. Manuals
  2. Tumbleweed
  3. lapack-man
  4. SLAMC3(3)

Scroll to navigation

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/INSTALL/slamch.f(3) Library Functions Manual /home/abuild/rpmbuild/BUILD/lapack-3.12.0/INSTALL/slamch.f(3)

NAME

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/INSTALL/slamch.f

SYNOPSIS

Functions/Subroutines


real function SLAMCH (cmach)
SLAMCH real function SLAMC3 (a, b)
SLAMC3

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.
!>

Author

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

Parameters

A 

!>

B

!>          The values A and B.
!>

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.
!>

Definition at line 170 of file slamch.f.

real function SLAMCH (character cmach)

SLAMCH SLAMCHF77 deprecated

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.

Purpose:

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

Parameters

CMACH 

!>          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.

Version 3.12.0 LAPACK