32
Figure 2.6 shows the instruction code format of arithmetic, logic, and shift instructions.
15
0
8
7
op
rm
rn
ADD, SUB, CMP,
ADDX, SUBX (Rm)
Notation:
op:
rm, rn:
IMM:
Operation field
Register field
Immediate data
15
0
8
7
op
rn
ADDS, SUBS, INC, DEC,
DAA, DAS, NEG, NOT
15
0
8
7
op
rn
MULXU, DIVXU
rm
15
0
8
7
rn
IMM
ADD, ADDX, SUBX,
CMP (#XX:8)
op
15
0
8
7
op
rn
AND, OR, XOR (Rm)
rm
15
0
8
7
rn
IMM
AND, OR, XOR (#xx:8)
op
15
0
8
7
rn
SHAL, SHAR, SHLL, SHLR,
ROTL, ROTR, ROTXL, ROTXR
op
Figure 2.6 Arithmetic, Logic, and Shift Instruction Codes