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CHAPTER 6 DETAILED RULES FOR EXECUTION INSTRUCTIONS
6.32 DECW (DECrement Word Data of Stack Pointer)
Decrement word data of SP by one.
■DECW (DECrement Word Data of Stack Pointer)
Operation
(SP) ← (SP) - 1 (Word subtraction)
Assembler format
DECW SP
Condition code (CCR)
N | Z | V | C |
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- | - | - | - |
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+: Changed by executing instruction
N:Not changed
Z:Not changed
V:Not changed
C:Not changed
Number of execution cycle: 1
Byte count: 1
OP code: D1
110