This math scares me
Edward Jason Riedy
ejr at cs.berkeley.edu
Tue Mar 13 17:10:08 EST 2001
And Andrew Koenig writes:
-
- Briefly, IEEE requires that input and output conversion have no more
- than 0.47 LSB error; Scheme requires that input conversion be exact
- (that is, that the internal representation always be the closest
- (according to the rounding rules currently in effect) internal number
- to the infinite-precision value read, and that output yield the
- smallest number of significant digits necessary for idempotence).
The next revision of IEEE 754 will require exact conversion, as
well. However, note that there is no concept of a language
complying with IEEE 754, or even a library... It's just a vague
`system.'
Jason
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