On Thu, 2 Aug 2012 10:35:03 -0700, John R. Ehrman (408-463-3543 T/543-) wrote: > >The halfword versions of NIxx and OIxx were done for an earlier >machine. When the time came to add the fullword versions such >as NIxF and OIxF (and XIxF), the CPU architectes realized that >there was no need for the halfword versions, ... Because the >halfword versions of N and O were already in the field and >couldn't be removed, only the fullword versions of X were added. > Are the instruction lengths the same? (Not that anyone much cares nowadays.)
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