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Inc[w] increment (word) – Zilog Z80380 User Manual

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Z380

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SER

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ANUAL

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ILOG

DC-8297-03

INC[W]

INCREMENT (WORD)

INC[W] dst

dst = R, RX

Operation:

if (XM) then begin

dst(31-0)

<

dst(31-0) + 1

end

else begin

dst(15-0)

dst(15-0) + 1

end

The destination operand is incremented by one and the sum is stored in the destination.
Two’s complement addition is performed. Note that the length of the operand is controlled
by the Extended/Native mode selection, which is consistent with the manipulation of an
address by the instruction.

Flags:

S:

Unaffected

Z:

Unaffected

H:

Unaffected

V:

Unaffected

N:

Unaffected

C:

Unaffected

Addressing

Execute

Mode

Syntax

Instruction Format

Time

Note

R:

INC[W] R

00rr0011

2

X

RX:

INC[W] RX

11y11101 00100011

2

X

Field Encodings:

rr: 00 for BC, 01 for DE, 10 for HL, 11 for SP
y:

0 for IX, 1 for IY