OR

Logical OR

OR

OR


[Syntax]

(1)OR src, dest

(2)OR src, src2, dest

 

[Operation]

(1)dest = dest | src;

(2)dest = src | src2;

 

[Function]

-

(1)This instruction takes the logical OR of dest and src and places the result in dest.

-

(2)This instruction takes the logical OR of src and src2 and places the result in dest.

 

[Instruction Format]

Syntax

Processng Size

src

src2

dest

Code size

(Byte)

(1)OR src, dest

L

#UIMM:4

Rd

2

L

#SIMM:8

Rd

3

L

#SIMM:16

Rd

4

L

#SIMM:24

Rd

5

L

#IMM:32

Rd

6

L

Rs

Rd

2

L

[Rs].memex

Rd

2 (memex == UB)

3 (memex != UB)

L

dsp:8[Rs].memex

Rd

3 (memex == UB)

4 (memex != UB)

L

dsp:16[Rs].memex

Rd

4 (memex == UB)

5 (memex != UB)

(2)OR src, src2, dest

L

Rs

Rs2

Rd

3

 

[Flag Change]

Flag

C

Z

S

O

Change

 

 

Conditions

Z : The flag is set if dest is 0 after the operation; otherwise it is cleared.

S : The flag is set if the MSB of dest after the operation is 1 ; otherwise it is cleared.

 

[Description Example]

OR #8, R1

OR R1, R2

OR [R1], R2

OR 8[R1].L, R2

OR R1, R2, R3