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- Xref: sparky comp.os.os2.programmer:4450 comp.os.os2.misc:28248
- Path: sparky!uunet!TOROLAB6.VNET.IBM.COM
- From: ADUNSMUI@TOROLAB6.VNET.IBM.COM (Al Dunsmuir)
- Message-ID: <19920826.074333.779@almaden.ibm.com>
- Date: Wed, 26 Aug 92 10:35:55 EDT
- Newsgroups: comp.os.os2.programmer,comp.os.os2.misc
- Subject: Re: Does math coprocessor speed up GUI (here: OS/2 presentation mgr)?
- Organization: IBM Canada Laboratory Ltd, Toronto, CANADA
- Disclaimer: This posting represents the poster's views, not those of IBM
- News-Software: UReply 3.0
- References: <17fuahINN1tl@iraul1.ira.uka.de>
- Lines: 33
-
- In <17fuahINN1tl@iraul1.ira.uka.de> |S| Norbert Juffa writes:
- >Hi netters!
- >
- >I a recent article on coprocessors for 80x86 systems I posted to
- >comp.sys.ibm.pc.hardware I claimed that installing a math coprocessor
- >does not speed up GUIs (MS-Windows, OS/2 Presentation Mgr, X-Windows),
- >since these use only integer math internally. However, people have
- >told me that some GUIs indeed use fp math for stuff like arc drawing
- >and similar operations. Does anyone know for sure whether OS/2's GUI
- >benefits by installing a coprocessor. Please send email, as I do not
- >usually read this group. I'll post a summary of responses I get, if I
- >get any. Thanx in advance!
- >
- >Norbert
- >------------------------------------------------------------------------------
- >Norbert Juffa email: S_JUFFA@IRAVCL.IRA.UKA.DE Live and let live!
- >
- Norbert,
-
- Whenever this question is asked of the OS/2 developers, the answer is that
- for optimal performance all PM operations use integer math. Thus having a
- numeric coprocessor it will not speed up the base OS/2 presentation services.
-
- Having said that, having a math coprocessor (especially a tightly coupled
- one as implemented in the 486) can speed up OS/2 applications. For example,
- IBM's X-Windows server (PM screen interface for TCP/IP) achieves __dramatic__
- performance gains when a math coprocessor is present.
-
- Al Dunsmuir Internet: adunsmui@torolab6.vnet.ibm.com
- CODE Development II + TEAM OS/2 Voice: (416) 448-3315
- IBM Canada Laboratory Ltd, Toronto, CANADA
-
- OS/2 V2: Why settle for anything less?
-