> > > MOV CL, 4
> > > SHL AX, 4
> > > RET
> > Why not SHL AX,4?
> Because the 8088 didn't HAVE a shift immediate instruction. Check with
> Allison about which processor introduced it, and when it cam out. Was 286
> <= 1983?
Sorry if I'm not Alison :), but it has been the 186/188 (in my opinion
the most beautiful member of the x86 family) which first used a barrel
shifter and first allowed immidiate multiple shifts. Correct me if my
memory is corroded.
Gruss
H.
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Ich denke, also bin ich, also gut
HRK
Received on Tue Apr 20 1999 - 15:08:43 BST