| slovo | definícia |
underflow
(encz) | underflow,nenaplnění n: Zdeněk Brož |
underflow
(encz) | underflow,podtečení n: Zdeněk Brož |
underflow
(foldoc) | underflow
floating point underflow
floating underflow
(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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| | podobné slovo | definícia |
floating point underflow
(foldoc) | underflow
floating point underflow
floating underflow
(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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floating underflow
(foldoc) | underflow
floating point underflow
floating underflow
(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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lost in the underflow
(foldoc) | lost in the underflow
Too small to be worth considering; more specifically,
small beyond the limits of accuracy or measurement. This is a
reference to "floating point underflow".
The Hacker's Jargon File claimed that it is also a pun on
"undertow" (a kind of fast, cold current that sometimes runs
just offshore and can be dangerous to swimmers).
"Well, sure, photon pressure from the stadium lights alters
the path of a thrown baseball, but that effect gets lost in
the underflow".
Compare epsilon, epsilon squared; see also overflow bit.
(1997-09-05)
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lost in the underflow
(jargon) | lost in the underflow
adj.
Too small to be worth considering; more specifically, small beyond the
limits of accuracy or measurement. This is a reference to floating
underflow, a condition that can occur when a floating-point arithmetic
processor tries to handle quantities smaller than its limit of magnitude.
It is also a pun on ‘undertow’ (a kind of fast, cold current that sometimes
runs just offshore and can be dangerous to swimmers). “Well, sure, photon
pressure from the stadium lights alters the path of a thrown baseball, but
that effect gets lost in the underflow.” Compare epsilon, {epsilon
squared}; see also overflow bit.
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