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Re: naked zero_extracts longer than a word.
- From: Toon Moene <toon at moene dot org>
- To: Ian Lance Taylor <iant at google dot com>
- Cc: Kenneth Zadeck <zadeck at naturalbridge dot com>, gcc <gcc at gcc dot gnu dot org>, rdsandiford at googlemail dot com, law at redhat dot com, "Bonzini\, Paolo" <bonzini at gnu dot org>, wilson at codesourcery dot com
- Date: Mon, 11 May 2009 21:17:03 +0200
- Subject: Re: naked zero_extracts longer than a word.
- References: <4A083BC9.9040502@naturalbridge.com> <m3y6t3zjou.fsf@google.com>
Ian Lance Taylor wrote:
I guess the obvious counterexample would be a processor which supported
vector registers and supported bitfield operations on such registers. I
don't know of any such processors.
The Control Data Cyber 205 (roughly '75-'85).
You could write the inner loop of the Sieve of Eratosthenes as a single
vector instruction.
We do not have a (supported) port for that architecture.
Kind regards,
--
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
At home: http://moene.org/~toon/
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