Exception-Related Instructions - Motorola MC68020 User Manual

8.2.17 Exception-Related Instructions

The exception-related instructions table indicates the number of clock periods needed for
the processor to perform the specified exception-related action. Footnotes specify when it
is necessary to add the entry from another table to calculate the total effective execution
time for the given instruction. The total number of clock cycles is outside the parentheses;
the number of read, prefetch, and write cycles is given inside the parentheses as (r/p/w).
These cycles are included in the total clock cycle number.
Instruction
BKPT
Interrupt (I-Stack)
Interrupt (M-Stack)
RESET Instruction
STOP
Trace
TRAP #n
Illegal Instruction
A-Line Trap
F-Line Trap
Privilege Violation
TRAPcc (Trap)
TRAPcc (No Trap)
TRAPcc.W (Trap)
TRAPcc.W (No Trap)
TRAPcc.L (Trap)
TRAPcc.L (No Trap)
TRAPV (Trap)
TRAPV (No Trap)
MOTOROLA
Best Case
9(1/0/0)
26(2/0/4)
41(2/0/8)
518(0/0/0)
8(0/0/0)
25(1/0/5)
20(1/0/4)
20(1/0/4)
20(1/0/4)
20(1/0/4)
20(1/0/4)
23(1/0/5)
1(0/0/0)
23(1/0/5)
3(0/0/0)
23(1/0/5)
5(0/0/0)
23(1/0/5)
1(0/0/0)
M68020 USER'S MANUAL
Cache Case Worst Case
10(1/0/0) 10(1/0/0)
26(2/0/4) 33(2/2/4)
41(2/0/8) 48(2/2/8)
518(0/0/0) 519(0/1/0)
8(0/0/0)
25(1/0/5) 32(1/2/5)
20(1/0/4) 27(1/2/4)
20(1/0/4) 27(1/2/4)
20(1/0/4) 27(1/2/4)
20(1/0/4) 27(1/2/4)
20(1/0/4) 27(1/2/4)
25(1/0/5) 32(1/2/5)
4(0/0/0)
25(1/0/5) 33(1/3/5)
6(0/0/0)
25(1/0/5) 33(1/3/5)
8(0/0/0) 10(0/2/0)
25(1/0/5) 32(1/2/5)
4(0/0/0)
8(0/0/0)
5(0/1/0)
7(0/1/0)
5(0/1/0)
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