EP(3F) EP(3F)
ep: epbase, epprec, epemin, epemax, eptiny, ephuge, epmrsp - FORTRAN
numeric characteristic constants
integer *2 shrt
integer *4 intr
real *4 sngl
real *8 dbl
integer *8 ll
integer *4 nbase, nprec, nemin, nemax, nhuge
real *4 ftiny, fhuge, fepsl
real *8 dtiny, dhuge, depsl
integer *8 llhuge
nbase = epbase(shrt)
nprec = epprec(shrt)
nhuge = ephuge(shrt)
nbase = epbase(intr)
nprec = epprec(intr)
nhuge = ephuge(intr)
nbase = epbase(ll)
nprec = epprec(ll)
llhuge = ephuge(ll)
nbase = epbase(sngl)
nprec = epprec(sngl)
nemin = epemin(sngl)
nemax = epemax(sngl)
ftiny = eptiny(sngl)
fhuge = ephuge(sngl)
fepsl = epmrsp(sngl)
nbase = epbase(dbl)
nprec = epprec(dbl)
nemin = epemin(dbl)
nemax = epemax(dbl)
dtiny = eptiny(dbl)
dhuge = ephuge(dbl)
depsl = epmrsp(dbl)
ep is the general name for the set of intrinsic functions which return
the numeric characteristics of each of the standard numeric types.
epbase - returns the base for the type of the argument (for floating
point types, epbase returns the base of the mantissa). Currently this is
2.
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EP(3F) EP(3F)
epprec - returns the precision (in terms of power of the base) for the
type of the argument. The sign bit (if any) is not included in the
precision. The assumed bit (see IEEE floating point specifications), if
any, will be included in the precision.
epemin, epemax - returns the minimum (or maximum) exponent for the
floating point type of the argument.
eptiny, ephuge - returns the smallest (or largest) non-zero positive
number in the type of the argument.
epmrsp - returns the epsilon for the floating point type of the argument.
eptiny is not supported for integer types, it may be safely assumed to be
1.
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