Motorola MC68020 User Manual

MOTOROLA M68020 USER’S MANUAL 8- 37
8.2.15 Conditional Branch Instructions
The conditional branch instructions table indicates the number of clock periods needed for
the processor to perform the specified branch on the given branch size, with complete
execution times given. No additional tables are needed to calculate total effective
execution time for these instructions. 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 Best Case Cache Case Worst Case
Bcc (Taken) 3(0/0/0) 6(0/0/0) 9(0/2/0)
Bcc.B (Not Taken) 1(0/0/0) 4(0/0/0) 5(0/1/0)
Bcc.W (Not Taken) 3(0/0/0) 6(0/0/0) 7(0/1/0)
Bcc.L (Not Taken) 3(0/0/0) 6(0/0/0) 9(0/2/0)
DBcc (cc = False, Count Not Expired) 3(0/0/0) 6(0/0/0) 9(0/2/0)
DBcc (cc = False, Count Expired) 7(0/0/0) 10(0/0/0) 10(0/3/0)
DBcc (cc = True) 3(0/0/0) 6(0/0/0) 7(0/1/0)

Motorola MC68020 Specifications

General

Brand	Motorola
Model	MC68020
Category	Computer Hardware
Language	English