slamch (l)  Linux Manuals
slamch: single precision machine parameters
Command to display slamch
manual in Linux: $ man l slamch
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:
= aqEaq or aqeaq, SLAMCH := eps
= aqSaq or aqs , SLAMCH := sfmin
= aqBaq or aqbaq, SLAMCH := base
= aqPaq or aqpaq, SLAMCH := eps*base
= aqNaq or aqnaq, SLAMCH := t
= aqRaq or aqraq, SLAMCH := rnd
= aqMaq or aqmaq, SLAMCH := emin
= aqUaq or aquaq, SLAMCH := rmin
= aqLaq or aqlaq, SLAMCH := emax
= aqOaq or aqoaq, 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**(emin1)
emax = largest exponent before overflow
rmax = overflow threshold  (base**emax)*(1eps)
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 sla_geamv (l)  performs one of the matrixvector operations y := alpha*abs(A)*abs(x) + beta*abs(y),
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