* [parisc-linux] Conditional Execution and Instruction Nullification
[not found] ` <43DBA5A1.90002@tiscali.be>
@ 2006-01-29 3:14 ` Stuart Brady
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From: Stuart Brady @ 2006-01-29 3:14 UTC (permalink / raw)
To: Joel Soete; +Cc: rmk+lkml, parisc-linux
On Sat, Jan 28, 2006 at 05:10:57PM +0000, Joel Soete wrote:
> Ah ok sorry, I was confused by a colleague of mine experimented in other
> cpu risc who tell me that 'instrucion nullification' was typicaly RISC,
> though. (I can just try to ask him more details on cpu arch he spoke about)
Ignoring conditional traps/branches (and hoping I've got this right):
Neither Alpha nor PowerPC have conditional execution. MIPS and SPARC
have conditional move instructions (as does POWER). ARM has conditional
execution for most instructions. PA-RISC has instruction nullification.
SPARC does have delay slot nullification (with confusing semantics), but
that's unrelated. MIPS (since MIPS II) and PA-RISC have this, too.
http://gec.di.uminho.pt/discip/TextoAC/AnexoE.html might be a good read.
Cheers,
--
Stuart Brady
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2006-01-29 3:14 ` [parisc-linux] Conditional Execution and Instruction Nullification Stuart Brady
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