Re: Lunia Update and 64-bit Instruction Size Advice Request

[KHMan <keinhong@...>]

On 5/31/2015 8:12 AM, Paige DePol wrote:
> Roberto Ierusalimschy wrote:
> > [snip]
> [snip]
> What sort of performance gains did you see from switching to the BCA
> format, and which CPUs specifically had this issue, by the way?

8086 thru 80286 and at least 68000. 80386 or later have barrel 
shifters for single cycle shifts. Old 8-bit microcontrollers often 
shift by 1 bit per instruction. But anything 32/64-bit that is a 
modern arch would have plenty of silicon on 130nm (or better) fabs 
and should do N bits at a time.

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia