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underflow
XDict
下溢
PyDict
下溢
Taiwan
MOE
computer
dictionary
(
moecomp
)
underflow
下溢; 缺; 欠位; 超下限; 低於下限
Network
Terminology
(
netterm
)
underflow
下溢
The
Free
On
-
line
Dictionary
of
Computing
(
foldoc
)
(
or
"
floating
point
underflow
", "
floating
underflow
",
after
"{
overflow
}")
A
condition
that
can
occur
when
the
result
of
a
{
floating
-
point
}
operation
would
be
smaller
in
magnitude
(
closer
to
zero
,
either
positive
or
negative
)
than
the
smallest
quantity
representable
.
Underflow
is
actually
(
negative
) {
overflow
}
of
the
{
exponent
}
of
the
{
floating
point
}
quantity
.
For
example
,
an
eight
-
bit
{
twos
complement
}
exponent
can
represent
multipliers
of
2
^-
128
to
2
^
127
.
A
result
less
than
2
^-
128
would
cause
underflow
.
Depending
on
the
{
processor
},
the
programming
language
and
the
{
run
-
time
system
},
underflow
may
set
a
status
bit
,
raise
an
{
exception
}
or
generate
a
{
hardware
} {
interrupt
}
or
some
combination
of
these
effects
.
Alternatively
,
it
may
just
be
ignored
and
zero
substituted
for
the
unrepresentable
value
,
though
this
might
lead
to
a
later
{
divide
by
zero
}
error
which
cannot
be
so
easily
ignored
.
(
2006
-
11
-
09
)
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