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| Related articles |
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| Register Files storm@binkley.cs.mcgill.ca (1992-10-05) |
| Re: Register Files preston@helena.cs.rice.edu (1992-10-05) |
| Re: Register Files ssimmons@convex.com (1992-10-06) |
| Re: Register Files cliffc@cs.rice.edu (1992-10-06) |
| Re: Register Files hobbs@steven.enet.dec.com (1992-10-06) |
| Re: Register Files kendall@centerline.com (1992-10-07) |
| Re: Register Files bart@cs.uoregon.edu (1992-10-07) |
| Re: Register Files henry@zoo.toronto.edu (1992-10-07) |
| Re: Register Files ali@LARK.WARP.CS.CMU.EDU (Ali-Reza Adl-Tabatabai) (1992-10-22) |
| Re: Register Files idacrd!desj@uunet.UU.NET (1992-10-23) |
| Newsgroups: | comp.compilers |
| From: | bart@cs.uoregon.edu (Barton Christopher Massey) |
| Organization: | University of Oregon Computer and Information Sciences Dept. |
| Date: | Wed, 7 Oct 1992 08:21:21 GMT |
| Keywords: | registers, optimize, comment |
| References: | 92-10-019 |
ssimmons@convex.com (Steve Simmons) writes:
> [machines with separate register sets] can fetch, decode and execute both an
> integer and a floating point instruction on the same cycles.
>
> Be careful about some of the hype in the marketing literature. The Intel
> i860 has been doing that for 4 years now.
Much earlier, the 11/70 did this. Some predecessors of mine at
Reed built a nice numerical ODE solver which did this in
handcrafted assembly, and did about double the speed. Then the
11/785 came along and the overlap was gone -- a sad waste of
hard work :-).
Bart Massey
bart@cs.uoregon.edu
[Overlapped integer and floating operations have been common for years. The
360/91 did so in a very complicated way in 1969, and the Intel 8087 ran in
parallel with the 8086 in about 1978. -John]
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