Computer Hardware User's Guide

Parallel MPYF3 and SUBF3 MPYF3||SUBF3
13-155 Assembly Language Instructions
Syntax MPYF3 srcA, srcB, dst1
|| SUBF3 srcC, srcD, dst2
Operation srcA × srcB → dst1
|| srcD – srcC → dst2
Operands
srcA
srcB
srcC
srcD
Any two register (0 R n 7)
Any two indirect ( disp = 0, 1, IR0, IR1)
dst1 register ( d1 ):
0 = R0
1 = R1
dst2 register ( d2 ):
0 = R2
1 = R3
src1 register (R n , 0 ≤ n ≤ 7)
src2 register (R n , 0 ≤ n ≤ 7)
src3 indirect ( disp = 0, 1, IR0, IR1)
src4 indirect ( disp = 0, 1, IR0, IR1)
P parallel addressing modes (0 ≤ P ≤ 3)