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Groups > comp.lang.forth > #44162
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: D>F and S>F first draft |
| Date | 2015-12-09 16:58 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2015Dec9.175849@mips.complang.tuwien.ac.at> (permalink) |
| References | (6 earlier) <55f0b46f-36be-4587-8014-bc5cede778ec@googlegroups.com> <2015Dec5.122557@mips.complang.tuwien.ac.at> <f5fd5b5b-2dc6-48ba-9c8b-e9ec8d25799d@googlegroups.com> <2015Dec5.163312@mips.complang.tuwien.ac.at> <f5a5614c-7367-4830-8cd0-71a97db23057@googlegroups.com> |
mhx@iae.nl writes:
>On Saturday, December 5, 2015 at 4:55:27 PM UTC+1, Anton Ertl wrote:
>> 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?
>
>These instructions do not convert 128-bit integers to=20
>80-bit floats, and do not work with the FPU stack.
True, so you cannot use them directly for converting 128-bit integers
to FP singles or doubles, and probably not at all for converting
integers to 80-bit floats. But it seems that the designers of these
instructions thought that getting the FP number closest to the integer
was a useful operation, and apparently nobody at Intel or AMD felt
that producing a NaN with some kind of payload in that situation is
particularly useful. After all, if rounding on an inexact result is
acceptable for, say, multiplication, why should it be "a mess" on
converting from an integer?
- 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
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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
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