Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.forth > #44087
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: D>F and S>F first draft |
| Date | 2015-12-05 15:33 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2015Dec5.163312@mips.complang.tuwien.ac.at> (permalink) |
| References | (7 earlier) <n3u1dg$5gf$1@speranza.aioe.org> <2d978ba0-d332-447c-b484-31563cd72e4d@googlegroups.com> <55f0b46f-36be-4587-8014-bc5cede778ec@googlegroups.com> <2015Dec5.122557@mips.complang.tuwien.ac.at> <f5fd5b5b-2dc6-48ba-9c8b-e9ec8d25799d@googlegroups.com> |
mhx@iae.nl writes:
>On Saturday, December 5, 2015 at 12:59:36 PM UTC+1, Anton Ertl wrote:
>> mhx@iae.nl writes:
>> >On Saturday, December 5, 2015 at 8:58:33 AM UTC+1, Julian Fondren wrote:
>> >> On Saturday, December 5, 2015 at 12:49:25 AM UTC-6, HAA wrote:
>[..]
>> If it does not help, at least you can determine that the result is not
>> exact, which you cannot do with an ambiguous result.
>
>Then instead of creating a mess, let's consider prescribing
>that D>F returns NaN when conversion is inexact. The payload
>of this NaN might contain a suitable approximation (just a
>suggestion, I would not use it myself).
There is no requirement that the system uses an FP representation that
supports NaNs (much less NaNs with a payload). There is no standard
way to recognize a NaN nor a standard way to extract a payload.
Even if we had all that, what advantage would your variant buy that
justifies complicating the implementation with this stuff?
And if the behaviour you suggest is better than the proposed
behaviour, why do AMD and Intel implement the proposed behaviour and not
your behaviour in the cvtsi2sd (and cvtsi2ss) instruction?
|When conversion is inexact, the value returned is rounded according
|to the rounding control bits in the MXCSR register.
<http://www.felixcloutier.com/x86/CVTSI2SD.html>
- anton
--
M. Anton Ertl http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs: http://www.complang.tuwien.ac.at/forth/faq/toc.html
New standard: http://www.forth200x.org/forth200x.html
EuroForth 2015: http://www.rigwit.co.uk/EuroForth2015/
Back to comp.lang.forth | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
RfD: D>F and S>F first draft C G Montgomery <cgm@physics.utoledo.edu> - 2015-11-21 17:59 -0500
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-22 18:25 +1100
Re: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 06:20 -0800
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-23 10:58 +1100
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-23 02:57 +0100
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-24 13:16 +1100
Re: D>F and S>F first draft Paul Rubin <no.email@nospam.invalid> - 2015-11-23 18:49 -0800
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-25 11:51 +1100
Re: D>F and S>F first draft Paul Rubin <no.email@nospam.invalid> - 2015-11-24 17:26 -0800
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-25 02:43 +0100
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-26 12:16 +1100
Re: D>F and S>F first draft Paul Rubin <no.email@nospam.invalid> - 2015-11-25 17:47 -0800
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-26 15:47 +1100
Re: D>F and S>F first draft Paul Rubin <no.email@nospam.invalid> - 2015-11-25 23:07 -0800
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-26 07:27 +0000
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-26 09:19 +0000
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-28 04:26 +1100
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-28 11:31 +0000
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-29 20:23 +1100
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-29 20:39 +0100
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-12-05 17:48 +1100
Re: D>F and S>F first draft Julian Fondren <julian.fondren@gmail.com> - 2015-12-04 23:58 -0800
Re: D>F and S>F first draft mhx@iae.nl - 2015-12-05 02:19 -0800
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-12-05 11:25 +0000
Re: D>F and S>F first draft Albert van der Horst <albert@spenarnc.xs4all.nl> - 2015-12-05 13:11 +0000
Re: D>F and S>F first draft mhx@iae.nl - 2015-12-05 05:27 -0800
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-12-05 15:33 +0000
Re: D>F and S>F first draft mhx@iae.nl - 2015-12-07 10:10 -0800
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-12-09 16:58 +0000
Re: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-12-06 10:23 -0800
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-12-06 21:37 +0100
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-12-05 19:08 +0100
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-30 08:33 +0000
Re: D>F and S>F first draft "Elizabeth D. Rather" <erather@forth.com> - 2015-11-25 21:43 -1000
Re: D>F and S>F first draft "HAA" <someone@microsoft.com> - 2015-11-28 19:28 +1100
Re: D>F and S>F first draft Albert van der Horst <albert@spenarnc.xs4all.nl> - 2015-11-26 11:37 +0000
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-22 15:10 +0000
Re: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-22 20:48 +0100
Re: D>F and S>F first draft "Elizabeth D. Rather" <erather@forth.com> - 2015-11-22 13:42 -1000
Re: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-23 11:50 +0000
Re: D>F and S>F first draft "Elizabeth D. Rather" <erather@forth.com> - 2015-11-23 12:46 -1000
Forth libraries Lars Brinkhoff <lars.spam@nocrew.org> - 2015-11-24 08:55 +0100
Re: RfD: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 06:33 -0800
Re: RfD: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-22 16:00 +0000
Re: RfD: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 08:53 -0800
Re: RfD: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 09:11 -0800
Re: RfD: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-22 18:24 +0000
Re: RfD: D>F and S>F first draft Paul Rubin <no.email@nospam.invalid> - 2015-11-22 09:07 -0800
Re: RfD: D>F and S>F first draft stephen@mpeforth.com (Stephen Pelc) - 2015-11-22 18:10 +0000
Re: RfD: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-22 18:26 +0000
Re: RfD: D>F and S>F first draft rickman <gnuarm@gmail.com> - 2015-11-22 13:58 -0500
Re: RfD: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-23 12:34 +0000
Re: RfD: D>F and S>F first draft Albert van der Horst <albert@spenarnc.xs4all.nl> - 2015-11-23 16:39 +0000
Re: RfD: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-24 03:00 +0100
Re: RfD: D>F and S>F first draft Lars Brinkhoff <lars.spam@nocrew.org> - 2015-11-23 13:48 +0100
Re: RfD: D>F and S>F first draft mhx@iae.nl - 2015-11-23 05:19 -0800
Re: RfD: D>F and S>F first draft mhx@iae.nl - 2015-11-23 16:09 -0800
Re: RfD: D>F and S>F first draft Bernd Paysan <bernd.paysan@gmx.de> - 2015-11-22 20:42 +0100
Re: RfD: D>F and S>F first draft C G Montgomery <cgm@physics.utoledo.edu> - 2015-11-22 16:43 -0500
Re: RfD: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 18:40 -0800
Re: RfD: D>F and S>F first draft krishna.myneni@ccreweb.org - 2015-11-22 18:51 -0800
Re: RfD: D>F and S>F first draft C G Montgomery <cgm@physics.utoledo.edu> - 2015-11-25 15:47 -0500
Re: RfD: D>F and S>F first draft anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-11-22 14:29 +0000
Re: RfD: D>F and S>F first draft "David N. Williams" <williams@umich.edu> - 2015-11-22 10:41 -0600
csiph-web