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Groups > comp.arch.embedded > #27771
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Use of soft float? |
| Date | 2018-05-21 21:49 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <pdvetr$12d$1@reader1.panix.com> (permalink) |
| References | <pdrgnm$6lg$1@solani.org> <pdu62b$olo$1@dont-email.me> <v5c6gd164b04kfvve19ie6u7qiqf567j0q@4ax.com> |
On 2018-05-21, upsidedown@downunder.com <upsidedown@downunder.com> wrote:
> What is so "bit perfect" about IEEE floats? The only thing that I
> can think of is handling of infinity and denorms and other special
> values.
Exactly how rounding and intermediate values interact is a sticky
issue. For example, the old Intel 8087 had 80-bit internal FP
registers. If you do a series of floating point operations in the
most obvious/efficient way (with 80-bit intermediate values), the
result you get might not be IEEE "bit-perfect" correct.
--
Grant Edwards grant.b.edwards Yow! My polyvinyl cowboy
at wallet was made in Hong
gmail.com Kong by Montgomery Clift!
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Use of soft float? Philipp Klaus Krause <pkk@spth.de> - 2018-05-20 11:56 +0200
Re: Use of soft float? Dimiter_Popoff <dp@tgi-sci.com> - 2018-05-20 14:24 +0300
Re: Use of soft float? Clifford Heath <no.spam@please.net> - 2018-05-21 09:24 +1000
Re: Use of soft float? Dimiter_Popoff <dp@tgi-sci.com> - 2018-05-21 10:35 +0300
Re: Use of soft float? Clifford Heath <no.spam@please.net> - 2018-05-22 09:33 +1000
Re: Use of soft float? Grant Edwards <invalid@invalid.invalid> - 2018-05-20 23:39 +0000
Re: Use of soft float? David Brown <david.brown@hesbynett.no> - 2018-05-21 12:12 +0200
Re: Use of soft float? upsidedown@downunder.com - 2018-05-22 00:36 +0300
Re: Use of soft float? Grant Edwards <invalid@invalid.invalid> - 2018-05-21 21:49 +0000
Re: Use of soft float? upsidedown@downunder.com - 2018-05-22 01:41 +0300
Re: Use of soft float? Clifford Heath <no.spam@please.net> - 2018-05-22 09:39 +1000
Re: Use of soft float? David Brown <david.brown@hesbynett.no> - 2018-05-22 11:23 +0200
Re: Use of soft float? Luke A. Guest <laguest@archeia.com> - 2018-06-06 04:37 +0100
Re: Use of soft float? Reinhardt Behm <rbehm@hushmail.com> - 2018-06-06 12:54 +0800
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