參數(shù)資料
型號: μPD703008
廠商: NEC Corp.
英文描述: 16/32 Bit RISC Microcontrollers(16/32位RISC微控制器)
中文描述: 16/32位RISC微控制器(16/32位的RISC微控制器)
文件頁數(shù): 60/141頁
文件大?。?/td> 374K
代理商: ΜPD703008
CHAPTER 5 INSTRUCTION
48
JARL
Jump and Register Link
Instruction format
JARL disp22, reg2
Operation
GR [reg2]
PC + 4
PC
PC + sign-extend (disp22)
Format
Format V
Op code
15
0 31
16
rrrrr11110dddddd ddddddddddddddd0
ddddddddddddddddddddd is the higher 21 bits of disp22.
Flag
CY
OV
S
Z
SAT
Instruction
JARL Jump and Register Link
Explanation
Saves the current PC value plus 4 to general register reg2, adds the current PC value and 22-
bit displacement, sign-extended to word length, and transfers control to that PC. Bit 0 of the
22-bit displacement is masked to 0.
Remark
The current PC value used for calculation is the address of the first byte of this instruction. If
the displacement value is 0, the branch destination is this instruction itself.
This instruction is equivalent to a call subroutine instruction, and saves the PC return address
to general register reg2. The JMP instruction, which is equivalent to a subroutine-return
instruction, can be used to specify the general register containing the return address saved
during the JARL subroutine-call instruction, to restore the program counter.
相關(guān)PDF資料
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μPD703008Y 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
μPD70F3008 16/32 Bit Single Chip Microcontrollers(16/32 位單片微控制器)
μPD70F3008Y 16/32 Bit RISC Microcontrollers(16/32位RISC微控制器)
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