1011
Instruction sur 3 quartets de la forme 1011 WXXX YYZZ
XXX:champ d'application
000 => P
001 => WP
010 => XS
011 => X
100 => S
101 => M
110 => B
111 => W
si s=0:
uu:
00 =>R=R-R'
01 =>R=R+1
10 =>R'=R'-R
11 =>R=R'-R
si s=1:
uu:
00 =>RSL
01 =>RSR
10 =>R=-R ordre des registres inversé
11 =>R=-R-1
ZZ:registre concerné:
00=A & B
01=B & C
10=C & A
11=C & D