Operations:

Syntax:

Operation:

Operands:

Program Counter:

Opcode

Comment

Stack

ORI Rd,K

Rd = Rd OR K

16 <= d <= 31, 0 <= K <= 255

PC = PC + 1

0110KKKKddddKKKK

Description

Performs the logical OR between the contents of register Rd and a constant, and places the result in the destination register Rd.

Status Register (SREG) and Boolean Formula

I

–

T

–

H

–

S

⇔

N XOR V, for signed tests.

V

0

0

Cleared.

N

⇔

R7

Set if MSB of the result is set; cleared otherwise.

Z

⇔

~R7 AND ~R6 AND ~R5 AND ~R4 AND ~R3 AND ~R2 AND ~R1 AND ~R0

Set if the result is 0x00; cleared otherwise.

C

–

R (Result)

R (Result) equals Rd after the operation.

Example: 

      ori   r16,0xF0   ; Set high nibble of r16
      ori   r17,1      ; Set bit 0 of r17

Words

1 (2 bytes)

Table Cycles

Name

Cycles

AVRe

1

AVRxm

1

AVRxt

1

AVRrc

1