Motorola M68000 User Manual page 130

Table 9-2. Move Byte and Word Instruction Execution Times
Source Dn
Dn 4(1/0) 4(1/0)
An 4(1/0) 4(1/0)
(An) 8(2/0) 8(2/0)
(An)+ 8(2/0) 8(2/0)
–(An) 10(2/0) 10(2/0)
(d 16 , An) 12(3/0) 12(3/0)
(d 8 , An, Xn)* 14(3/0) 14(3/0)
(xxx).W 12(3/0) 12(3/0)
(xxx).L 16(4/0) 16(4/0)
(d 16 , PC) 12(3/0) 12(3/0)
(d 8 , PC, Xn)* 14(3/0) 14(3/0)
#<data> 8(2/0) 8(2/0)
*The size of the index register (Xn) does not affect execution time.
Table 9-3. Move Byte and Word Instruction Loop Mode Execution Times
Loop Continued
Valid Count, cc False
Source (An)
Dn 10(0/1)
An* 10(0/1)
(An) 14(1/1)
(An)+ 14(1/1)
–(An) 16(1/1)
*Word only.
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An (An) (An)+
8(1/1) 8(1/1)
8(1/1) 8(1/1)
12(2/1) 12(2/1) 12(2/1)
12(2/1) 12(2/1) 12(2/1)
14(2/1) 14(2/1) 14(2/1)
16(3/1) 16(3/1) 16(3/1)
18(3/1) 18(3/1) 18(3/1)
16(3/1) 16(3/1) 16(3/1)
20(4/1) 20(4/1) 20(4/1)
16(3/1) 16(3/1) 16(3/1)
18(3/1) 18(3/1) 18(3/1)
12(2/1) 12(2/1) 12(2/1)
(An)+ –(An) (An)
10(0/1) — 18(2/1)
18(2/1)
10(0/1) —
14(1/1) 16(1/1) 20(3/1)
14(1/1) 16(1/1) 20(3/1)
16(1/1) 18(1/1) 22(3/1)
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Destination
–(An) (d 16 , An) (d 8 , An, Xn)*
8(1/1) 12(2/1) 14(2/1)
8(1/1) 12(2/1) 14(2/1)
16(3/1) 18(3/1)
16(3/1) 18(3/1)
18(3/1) 20(3/1)
20(4/1) 22(4/1)
22(4/1) 24(4/1)
20(4/1) 22(4/1)
24(5/1) 26(5/1)
20(4/1) 22(4/1)
22(4/1) 24(4/1)
16(3/1) 18(3/1)
Loop Terminated
Valid count, cc True
Destination
(An)+ –(An)
18(2/1) —
18(2/1) —
20(3/1) 22(3/1)
20(3/1) 22(3/1)
22(3/1) 24(3/1)
(xxx).W (xxx).L
12(2/1) 16(3/1)
12(2/1) 16(3/1)
16(3/1) 20(4/1)
16(3/1) 20(4/1)
18(3/1) 22(4/1)
20(4/1) 24(5/1)
22(4/1) 26(5/1)
20(4/1) 24(5/1)
24(5/1) 28(6/1)
20(4/1) 24(5/1)
22(4/1) 26(5/1)
16(3/1) 20(4/1)
Expired Count
(An) (An)+ –(An)
16(2/1) 16(2/1) —
16(2/1) 16(2/1) —
18(3/1) 18(3/1) 20(3/1)
18(3/1) 18(3/1) 20(3/1)
20(3/1) 20(3/1) 22(3/1)
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