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| From | "Derek M. Jones" <derek@_NOSPAM_knosof.co.uk> |
| Newsgroups | comp.compilers |
| Subject | Re: optimizing compilers for low power design |
| Date | Mon, 16 Jun 2014 12:11:32 +0100 |
| Organization | virginmedia.com |
| Lines | 16 |
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| Approved | comp.compilers@iecc.com |
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| Keywords | optimize, architecture, comment |
| Posted-Date | 16 Jun 2014 11:55:42 EDT |
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| Xref | csiph.com comp.compilers:1263 |
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Kaz, > Furthermore, even if power cost is real, and you choose instructions according > to power cost, it's not going to work because instructions have to be primarily > chosen according to the computation that needs to be done. There has been some interesting work on making power minimization a constraint during instruction scheduling. A surprising percentage of power is consumed when a signal changes from 0 to 1 or from 1 to 0. So the idea is to arrange instruction order to minimise the number of transitions at each bit position in an instruction sequence. [CMOS only uses power when it switches, so I'd think approximately all of the power would be consumed when a signal changes. The idea of Gray coded instruction streams is weirdly appealing. -John]
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optimizing compilers for low power design idatarm@gmail.com - 2014-06-15 05:20 -0700
Re: optimizing compilers for low power design Kaz Kylheku <kaz@kylheku.com> - 2014-06-15 15:43 +0000
Re: optimizing compilers for low power design Ivan Godard <ivan@ootbcomp.com> - 2014-06-15 11:19 -0700
Re: optimizing compilers for low power design <Pidgeot18@verizon.com.invalid> - 2014-06-15 18:58 -0500
Re: optimizing compilers for low power design "Derek M. Jones" <derek@_NOSPAM_knosof.co.uk> - 2014-06-16 12:11 +0100
Re: optimizing compilers for low power design George Neuner <gneuner2@comcast.net> - 2014-06-18 04:44 -0400
Re: optimizing compilers for low power design glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-06-20 18:13 +0000
Re: optimizing compilers for low power design Ivan Godard <ivan@ootbcomp.com> - 2014-06-20 11:52 -0700
Re: optimizing compilers for low power design Gene Wirchenko <genew@telus.net> - 2014-06-20 12:16 -0700
Re: optimizing compilers for low power design George Neuner <gneuner2@comcast.net> - 2014-06-20 17:24 -0400
Re: optimizing compilers for low power design Walter Banks <walter@bytecraft.com> - 2014-06-16 13:30 -0400
Re: optimizing compilers for low power design andrewchamberss@gmail.com - 2014-06-20 05:03 -0700
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