Author: Dave Gomboc
Date: 14:29:07 06/14/00
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On June 14, 2000 at 16:17:25, Christophe Theron wrote: >The availability of 64 bits processors changes nothing. Unless some 64 bits >processors are so lousy that 8, 16 and 32 bits operations become slower than 64 >bits ops...! :) I don't think it is unusual for certain operations on sizes smaller than the processor word size to take longer than they would if they used the processor's word size. Indeed, it wouldn't even be unusual for it to be possible without first sign-extending or zero-extending from the smaller size to the processor word size. AFAIK, 80x86 is a bit freaky in that it tries very hard to support 8-bit and 16-bit operations in registers as quickly as 32-bit operations. Dave
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