Author: Robert Hyatt
Date: 10:16:39 09/30/98
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On September 30, 1998 at 05:18:38, Jouni Uski wrote: >Aha. But for user speed is the most important thing and I think it's not >automatically increased with all this 32-bit stuf. > >Jouni This depends. The pentium pro, for example, *hates* 16 bit instructions, because the cpu core is optimized for 32 bit stuff. And 16 bit instructions actually run significantly slower than the corresponding 32 bit stuff. The PII corrected much of this, but 32 bit codes are still somewhat faster, due to the problems of having 32 bit busses and trying to pass 16 bit operands around... unnecessary sign-extensions and such, plus problems in accessing the half of the 32 bit word the 16 bit instruction really wants...
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