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UM018809-0611 OR Instruction

ZNEO

CPU Core

User Manual

131

Definition

Logical OR

Syntax

OR dst, src

Operation

dst 

dst OR src

Description

The source operand is logically ORed with the destination operand and the destination operand

stores the result. The contents of the source operand are unaffected. An OR operation stores 1 in

the destination bit when either of the corresponding bits in the two operands is a 1. Otherwise, the

OR operation stores a 0 bit. Table 22 summarizes the OR operation.

Flags

Table 22. Truth Table for OR

dst src Result (dst)

00 0

10 1

01 1

11 1

76543210

C Z S V B CIRQE IRQE

–**0*–––

Legend

C = No change.

Z = Set to 1 if the result is zero; otherwise, set to 0.

S = Set to 1 if the result msb is 1; otherwise set to 0.

V = Cleared to 0.

B = Set to 1 if the initial destination or source value is 0; otherwise set to 0.

CIRQE = No change.

IRQE = No change.

1 2 ... 142 143 144 145 146 147 148 149 150 151 152 ... 215 216

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