Subject:
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Re: 8-bit floating-point number representations?
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Wed, 3 Jan 2001 22:45:41 GMT
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Viewed:
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94 times
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Todd Lehman wrote:
>
> Anyone know of a good C library that efficiently implements conversion from
> a processor-native 'double' floating-point precision number to some standard
> form of an 8-bit floating-point number and back? And a Perl5 library to go
> with it?
Hmm, 8 bit floating point numbers can't implement a very large range of
numbers. How many bits of exponent were you planning on?
I think conversion would probably actually be pretty easy since you will
just take e bits of the exponent from the double and 8-e bits of the
rest (mantissa? gosh I haven't done math in ages). You of course should
check that the exponent is in range. I guess you might also want to
handle the case where the exponent is out of range, but the number can
still be expressed in your 8 bit float as a denormalized number, but
this only works for small numbers and you lose precision.
--
Frank Filz
-----------------------------
Work: mailto:ffilz@us.ibm.com (business only please)
Home: mailto:ffilz@mindspring.com
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Message has 1 Reply:
 | | Re: 8-bit floating-point number representations?
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| (...) After thinking about this, I realized most compact binary floating point forms don't allow denormalized numbers. The reason is that if one assures that all numbers are normalized, the bit to the left of the decimal point is always a 1, and (...) (24 years ago, 4-Jan-01, to lugnet.off-topic.geek)
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Message is in Reply To:
| | 8-bit floating-point number representations?
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| Anyone know of a good C library that efficiently implements conversion from a processor-native 'double' floating-point precision number to some standard form of an 8-bit floating-point number and back? And a Perl5 library to go with it? An array of (...) (24 years ago, 3-Jan-01, to lugnet.off-topic.geek)
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