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| Branch prediction hints in an ISA timgleason@my-deja.com (2000-10-10) |
| Re: Branch prediction hints in an ISA broeker@physik.rwth-aachen.de (Hans-Bernhard Broeker) (2000-10-12) |
| Re: Branch prediction hints in an ISA peter_flass@my-deja.com (2000-10-12) |
| Re: Branch prediction hints in an ISA djimenez@cs.utexas.edu (2000-10-12) |
| Re: Branch prediction hints in an ISA Kahrs.Juergen@stn-atlas.de (Juergen Kahrs) (2000-10-12) |
| Re: Branch prediction hints in an ISA erik@arbat.com (Erik Corry) (2000-10-12) |
| Re: Branch prediction hints in an ISA vbdis@aol.com (2000-10-12) |
| Re: Branch prediction hints in an ISA zs@ender.cs.mu.oz.au (2000-10-15) |
| Re: Branch prediction hints in an ISA david.thompson1@worldnet.att.net (David Thompson) (2000-10-18) |
| Re: Branch prediction hints in an ISA anton@mips.complang.tuwien.ac.at (2000-10-18) |
| Re: Branch prediction hints in an ISA dietrich@216.26.55.26 (Dietrich Epp) (2000-10-19) |
| [1 later articles] |
| From: | Juergen Kahrs <Kahrs.Juergen@stn-atlas.de> |
| Newsgroups: | comp.compilers |
| Date: | 12 Oct 2000 22:22:25 -0400 |
| Organization: | STN Atlas Elektronik GmbH SLE1 |
| References: | 00-10-078 |
| Keywords: | architecture, books |
timgleason@my-deja.com wrote:
> Hey I was just thinking. Does anyone know of any Instruction Sets
> that have an extra bit in the branch instruction to be used as a
> "hint" for the branch prediction logic?
Donald Knuth redefined his MIX assembly language:
http://www-cs-faculty.Stanford.EDU/~knuth/mmixware.html
In his opcode matrix he mentions these instructions which do
exactly what you are looking for:
http://www-cs-faculty.Stanford.EDU/~knuth/mmop.html
5E PBEV probable branch if even (3)
5F PBEVB probable branch if even, backward (3)
50 PBN probable branch if negative (3)
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| Juergen Kahrs, STN Atlas Elektronik GmbH, D-28305 Bremen |
| Simulation Division Sebaldsbruecker Heerstr. 235 +49/421/457-2819 |
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