參數(shù)資料
型號(hào): UPD178F054
英文描述: 78K/0 Series for Instructions | User's Manual[10/2001]
中文描述: 78K線/ 0系列說明|用戶手冊(cè)[10/2001]
文件頁數(shù): 102/129頁
文件大?。?/td> 644K
代理商: UPD178F054
74
CHAPTER 5 EXPLANATION OF INSTRUCTIONS
User's Manual U12326EJ4V0UM
Decrement Word
DECW
Word Data Decrement
[Instruction format]
DECW dst
[Operation]
dst
← dst – 1
[Operand]
Mnemonic
Operand (dst)
DECW
rp
[Flag]
ZAC
CY
[Description]
The destination operand (dst) contents are decremented by only one.
Because this instruction is frequently used for decrement of a register (pointer) used for addressing, the Z,
AC and CY flag contents are not changed.
[Description example]
DECW DE; The DE register is decremented.
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