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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
addressing mode operands such as immediate data fields, displacements, and
index operands. 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.
Table 4-11. Operation Code Map
Bits [15:12]
Operation
0000
Bit Manipulation/MOVEPllmmediate
0001
Move Byte
0010
Move Long
0011
Move Word
0100
Miscellaneous
0101
ADDO/SUBO/Scc/DBccITRAPcc
0110
Bcc/BSR/B RA
0111
MOVEO
1000
ORiDIV/SBCD
1001
SUB/SUBX
1010
(Unassigned, Reserved)
1011
CMP/EOR
1100
AND/MUUABCD/EXG
1101
ADD/ADDX
1110
Shift/Rotate/Bit Field
1111
Table Lookup and Interpolation
CPU32 REFERENCE MANUAL
INSTRUCTION SET
MOTOROLA
4-175
III
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