PEP 327: Decimal Data Type
Tim Roberts
timr at probo.com
Sun Feb 8 07:55:24 CET 2004
anton at vredegoor.doge.nl (Anton Vredegoor) wrote:
>
>One possible option would be to provide for some kind of random
>rounding routine for some of the least significant bits of a floating
>point value.
I'm not so sure about this. It still gives you what seems to be an exact
answer with 15 decimal places, but now you have non-determinism. The real
answer, I think, is getting people to understand how much of their
real-world measurements are garbage.
>The advantage would be that this would also be usable for
>DSP-like computations that are used in music programming (volume
>adjustments) or in digital video (image rotation).
Interesting. I know you were kind of talking off the top of your head, but
can you tell me what leads you to thinking that some low-order randomness
would be helpful in those particular applications?
>Maybe we need a DSP-float instead of a decimal data type? Decimals
>could be used for testing DSP-float implementations.
Can you describe what you mean by DSP-float? I'm not sure why a DSP should
treat floats any differently than an ordinary processor.
--
- Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.
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