Instruction Format Summary - Motorola CPU32 Reference Manual

4.5 Instruction Format Summary

A summary of the primary words in each instruction of the instruction set follows. The
complete instruction definition consists of the primary words followed by the address-
ing mode operands such as immediate data fields, displacements, and index oper-
ands. The four most significant bits of the first (or only) primary word provide a means
of categorizing the instructions. Table 4-11 is an operation code (opcode) map that
lists an instruction category for each combination of these bits.
Bits [15:12]
MOTOROLA
4-170
Table 4-11 Operation Code Map
0000 Bit Manipulation/MOVEP/Immediate
0001 Move Byte
0010 Move Long
0011 Move Word
0100 Miscellaneous
0101 ADDQ/SUBQ/Scc/DBcc/TRAPcc
0110 Bcc/BSR/BRA
0111 MOVEQ
1000 OR/DIV/SBCD
1001 SUB/SUBX
1010 (Unassigned, Reserved)
1011 CMP/ EOR
1100 AND/MUL/ABCD/EXG
1101 ADD/ADDX
1110 Shift/Rotate/Bit Field
1111 Table Lookup and Interpolation
INSTRUCTION SET
Operation
CPU32
REFERENCE MANUAL