Difference between revisions of "DECR"
m (Protected "DECR" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))) |
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(No difference)
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Latest revision as of 08:15, 4 December 2010
Instruction Name | Decrement Register |
Mnemonic | DECR |
CP1610 Clock Cycles | 6 |
Interruptible | Yes |
Opcode Range | $0010-$0017 |
Input Flags | None |
Output Flags | Sign Flag, Zero Flag |
The Decrement Register (DECR) instruction decrements the specified register by one (1) and sets or clears the Sign Flag and Zero Flag according to the results.
0000:0000:0001:0rrr
where: rrr indicates the target register such that: rrr == 000 indicates register R0 rrr == 001 indicates register R1 rrr == 010 indicates register R2 rrr == 011 indicates register R3 rrr == 100 indicates register R4 rrr == 101 indicates register R5 rrr == 110 indicates register R6 rrr == 111 indicates register R7