Motorola M68000 - Miscellaneous Instruction Execution Times

MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL 7- 9
Table 7-12. Multiprecision Instruction
Execution Times
Instruction Size op Dn, Dn op M, M
ADDX Byte
Word
Long
8(2/0)
8(2/0)
12(2/0)
22(4/1)
50(6/2)
58(10/4)
CMPM Byte,
Word
Long
—
—
—
16(4/0)
24(6/0)
40(10/0)
SUBX Byte, \
Word
Long
8(2/0)
8(2/0)
12(2/0)
22(4/1)
50(6/2)
58(10/4)
ABCD Byte 10(2/0) 20(4/1)
SBCD Byte 10(2/0) 20(4/1)
7.11 MISCELLANEOUS INSTRUCTION EXECUTION TIMES
Tables 7-13 and 7-14 list the timing data for miscellaneous instructions. The total number
of clock periods, the number of read cycles, and the number of write cycles are shown in
the previously described format. The number of clock periods, the number of read cycles,
and the number of write cycles, respectively, must be added to those of the effective
address calculation where indicated by a plus sign (+).
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