Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!brutus.cs.uiuc.edu!apple!mips!hal!mark
From: mark@mips.COM (Mark G. Johnson)
Newsgroups: comp.arch
Subject: Re: Pipelined FP add
Message-ID: <33623@mips.mips.COM>
Date: 14 Dec 89 23:04:08 GMT
References: <241@dg.dg.com> <33570@hal.mips.COM> <3740@brazos.Rice.edu> <38132@ames.arc.nasa.gov>
Sender: news@mips.COM
Lines: 8

In article <38132@ames.arc.nasa.gov> lamaster@ames.arc.nasa.gov (Hugh LaMaster) writes:
  >(I hope nobody still uses the IBM 360 setup, where you have to push
  >the data to *memory* to get it back and forth between integer and fp
  > units...)

I believe SPARC does this, because there aren't FPR <-> GPR move instructions.
However, "*memory*" is just a few cycles away (3 for the store, 2 more for
the load) thanks to cache.