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Chapter 7 Branch Instruction
1.Branch Instruction with Delay Slot
Chapter 7
Branch Instruction
FR60 can instruct the operation with and without delay slot for branch instruction.
1. Branch Instruction with Delay Slot
• Branch instruction with delay slot
2. Operation of Branch Instruction with Delay Slot
Operation with delay slot executes the instruction located in the next address where a branch instruction exists
(referred to as delay slot) and then branches before executing branched instructions.
Since it executes delay slot instruction before branch operation, apparent execution rate becomes 1 cycle.
Instead, if delay slot has no valid instruction, NOP instruction must be entered.
• Example
In conditional branch instruction, regardless of whether branch parameter is approved or not, instructions
located in delay slot are executed.
In delay branch instruction, execution sequence of some instructions seems opposite, however, it only applies
to updating process on the PC. Any other operation (register update/look-up) is executed in the order of
description.
JMP:D @Ri
CALL:D label12
CALL:D @Ri
RET:D
BRA:D label9
BNO:D label9
BEQ:D label9
BNE:D label9
BC:D label9
BNC:D label9
BN:D label9
BP:D label9
BV:D label9
BNV:D label9
BLT:D label9
BGE:D label9
BLE:D label9
BGT:D label9
BLS:D label9
BHI:D label9
;
Sequence of instruction
ADD
R1
R2
;
BRA:D
LABEL
; Branch instruction
MOV
R2
R3
; Delay slot ...... To be executed before the branch.
...
LABEL : ST
R3
@R4 ; Branched instruction
Содержание FR Family FR60 Lite
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Страница 3: ...FR60 32 BIT MICROCONTROLLER MB91460 Series User s Manual ...
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Страница 38: ...22 Chapter 2 MB91460 Rev A Rev B Overview 4 Block Diagram ...
Страница 128: ...112 Chapter 4 CPU Architecture 9 Addressing ...
Страница 153: ...137 Chapter 8 Device State Transition 3 State Transition Diagram ...
Страница 154: ...138 Chapter 8 Device State Transition 3 State Transition Diagram ...
Страница 169: ...153 Chapter 9 Reset 10 Caution ...
Страница 170: ...154 Chapter 9 Reset 10 Caution ...
Страница 180: ...164 Chapter 10 Standby 7 Q A ...
Страница 182: ...166 Chapter 10 Standby 8 Caution ...
Страница 199: ...183 Chapter 12 Instruction Cache 2 Main body structure Figure 2 3 I Cache Address Map ...
Страница 200: ...184 Chapter 12 Instruction Cache 2 Main body structure Figure 2 4 I Cacheable Area ...
Страница 222: ...206 Chapter 13 Clock Control 8 Caution ...
Страница 232: ...216 Chapter 14 PLL Interface 7 Caution ...
Страница 236: ...220 Chapter 15 CAN Clock Prescaler 3 Registers ...
Страница 288: ...272 Chapter 19 Timebase Timer 8 Caution ...
Страница 314: ...298 Chapter 22 Main Oscillation Stabilisation Timer 8 Caution ...
Страница 326: ...310 Chapter 23 Sub Oscillation Stabilisation Timer 8 Caution ...
Страница 348: ...332 Chapter 25 External Interrupt 8 Caution ...
Страница 398: ...382 Chapter 26 DMA Controller 6 DMA External Interface ...
Страница 402: ...386 Chapter 27 Delayed Interrupt 8 Caution ...
Страница 412: ...396 Chapter 28 Bit Search 8 Caution ...
Страница 521: ...505 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 522: ...506 Chapter 30 I O Ports 3 Port Register Settings ...
Страница 549: ...533 Chapter 31 External Bus 2 External Bus Interface Registers is set to the high impedance state ...
Страница 574: ...558 Chapter 31 External Bus 4 Endian and Bus Access Byte Access ...
Страница 628: ...612 Chapter 31 External Bus 13 Notes on Using the External Bus Interface ...
Страница 706: ...690 Chapter 33 I2C Controller 4 Programming Flow Charts ...
Страница 748: ...732 Chapter 34 CAN Controller 4 CAN Application ...
Страница 762: ...746 Chapter 35 Free Run Timer 8 Caution ...
Страница 790: ...774 Chapter 37 Output Compare 8 Caution ...
Страница 838: ...822 Chapter 39 Programmable Pulse Generator 8 Caution ...
Страница 850: ...834 Chapter 40 Pulse Frequency Modulator 4 PFM Operation and Setting ...
Страница 886: ...870 Chapter 42 Sound Generator 3 Registers ...
Страница 900: ...884 Chapter 43 Stepper Motor Controller 4 Caution ...
Страница 939: ...923 Chapter 47 LCD Controller 3 Configuration Figure 3 2 Register List ...
Страница 943: ...927 Chapter 47 LCD Controller 4 Registers Correspondence between VRAM and Common Segment Pins ...
Страница 964: ...948 Chapter 48 Clock Monitor 8 Caution ...
Страница 994: ...978 Chapter 51 Low Voltage Reset Interrupt 3 Registers ...
Страница 998: ...982 Chapter 52 Regulator Control 3 Registers ...
Страница 1008: ...992 Chapter 53 Fixed Mode Reset Vector BOOT ROM 5 Bootloader Update Strategy ...
Страница 1024: ...1008 Chapter 54 Flash Memory 8 Caution ...
Страница 1032: ...1016 Chapter 55 Flash Security 4 Register ...
Страница 1034: ...1018 Chapter 56 Electrical Specification ...
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