fp_except
fpgetmask(
void
)
fp_rnd
fpgetround(
void
)
fp_except
fpgetsticky(
void
)
fp_except
fpsetmask(
fp_except mask
)
fp_rnd
fpsetround(
fp_rnd rnd_dir
)
fp_except
fpsetsticky(
fp_except sticky
)
FP_RZ
, FP_RM
, FP_RN
,
or
FP_RP
,
for rounding towards zero, rounding
(Minus infinity)
down, rounding to
nearest,
and rounding
(Plus infinity)
up.
The default mode is
FP_RN
.
An
fp_except
value is a bitmask specifying an exception type and containing any of
the values listed below.
FP_X_INV |
The
fpsetmask()
function will set the current exception mask, i.e., it will cause
future operations with the specified result status to raise the
SIGFPE
exception.
The
fpgetmask()
function will return the current exception mask.
The
fpsetround()
function will cause future operations to use the specified dynamic
rounding mode.
The
fpgetround(
)
function will return the current rounding mode.
A
``sticky''
status word may be maintained in which a bit is set every time an
exceptional floating point condition is encountered, whether or not a
SIGFPE
is generated.
The
fpsetsticky()
function will set or clear the specified exception history bits.
The
fpgetsticky(
)
function will return the exception history bits.
)
and
fpsetround(
)
functions return the
(previous)
rounding mode.
The
fpgetmask(
),
fpsetmask(
),
fpgetsticky(
),
and
fpsetsticky(
)
functions return the
(previous)
exception mask and exception history bits.