Article View: comp.arch
Article #12161Re: IEEE arithmetic
From: Jeff Kenton OSG/UEG
Date: Tue, 18 Jun 1991 12:37
Date: Tue, 18 Jun 1991 12:37
17 lines
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1563 bytes
In article <3736@charon.cwi.nl>, dik@cwi.nl (Dik T. Winter) writes: |> |> The keypoint here is that the 88k and 80x87 do have *separate* control and |> status registers. If they are separated there would (if the unit is well |> designen) be no need for a write to the control register to be serializing. |> And indeed, I do not think it is on those two (at least I have found in |> nowhere in the documentation). I do not know about the 29050; having no |> docs for it. |> The 88k does not serialize the processor when you write to the FP control register. You could add extra code to force serialization before a write. ----------------------------------------------------------------------------- == jeff kenton Consulting at kenton@decvax.dec.com == == (617) 894-4508 (603) 881-0011 == -----------------------------------------------------------------------------
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!hsdndev!husc6!genrad!decvax.dec.com!abyss.zk3.dec.com!kentonReferences:
<3709@charon.cwi.nl> <3710@charon.cwi.nl> <1991Jun17.231640.3426@dvorak.amd.com> <3736@charon.cwi.nl>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!hsdndev!husc6!genrad!decvax.dec.com!abyss.zk3.dec.com!kenton From: kenton@abyss.zk3.dec.com (Jeff Kenton OSG/UEG) Newsgroups: comp.arch Subject: Re: IEEE arithmetic Message-ID: <1991Jun18.123732.27164@decvax.dec.com> Date: 18 Jun 91 12:37:32 GMT References: <3709@charon.cwi.nl> <3710@charon.cwi.nl> <1991Jun17.231640.3426@dvorak.amd.com> <3736@charon.cwi.nl> Sender: usenet@decvax.dec.com (Usenet News System) Reply-To: kenton@abyss.zk3.dec.com (Jeff Kenton OSG/UEG) Organization: Digital Equipment Corporation - Nashua, NH Lines: 17 Nntp-Posting-Host: abyss.zk3.dec.com