Operation Of Branch Instruction Without Delay Slot - Fujitsu FR60 Hardware Manual

32-bit microcontroller mb91301 series

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CHAPTER 3 CPU AND CONTROL UNITS

Operation of Branch Instruction without Delay Slot

In operation without a delay slot, instructions are executed in the order in which they

are specified. An instruction immediately following a branch is never executed before

■ Branch Instructions without Delay Slot

Instructions written as follows perform a branch operation without a delay slot:

■ Operation of Branch Instruction without Delay Slot

In operation without a delay slot, instructions are executed in the order in which they are

specified. An instruction immediately following a branch is never executed before it.

A branch instruction without a delay slot is executed in two cycles if a branch occurs and in one

cycle if no branch occurs.

Since no appropriate instruction can be placed in the delay slot, this instruction results in a more

efficient instruction code than a branch instruction with a delay slot and with NOP specified.

For both optimum execution speed and code efficiency, select an operation with a delay slot if a

valid instruction can be placed in the delay slot; otherwise, select an operation without a delay

List of instructions

Branch instruction (without a delay slot)

Not executed

Branch destination