[Openmcl-devel] Error in rational -> float conversion
ron at flownet.com
Sun Sep 19 08:16:25 PDT 2021
Double-float version works for me:
"Version 1.11-r16812M (DarwinX8664)"
? (coerce 41107100000541273/100000000000 'double-float)
But there is definitely something hinky going on with converting to single-float:
? (float 411071000005/100000000000)
? (float 411071000006/100000000000)
? (float 4110710000055/100000000000)
On Sep 19, 2021, at 6:05 AM, Steven Nunez <steve_nunez at yahoo.com> wrote:
> Hi folks,
> I just posted an issue regarding what looks like a bug in rational->float conversion, and I'm hoping someone here can try this on 1.12 (preferably on MS Windows), or perhaps provide some insight as to what might be going on here for a quick fix.
> CL-USER> (lisp-implementation-version)
> "Version 1.11.8 (v1.11.8-2-gd411e378) WindowsX8664"
> CL-USER> (float 41107100000541273/100000000000)
> Hmm. If you work out the decimal points, the float is: 411071.00000541273, that's a long way from .03. Maybe coerce? Nope, that's even worse:
> CL-USER> (coerce 41107100000541273/100000000000 'double-float)
> Any ideas? That's not a small rounding error.
> Openmcl-devel mailing list
> Openmcl-devel at clozure.com
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