S912XEG128J2MAA Datasheet, PDF (440/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 10 XGATE (S12XGATEV3)
OR
Logical OR
OR
Operation
RS1 | RS2 ⇒ RD
RD | IMM16⇒ RD (translates to ORL RD, #IMM16[7:0]; ORH RD, #IMM16[15:8]
Performs a bit wise logical OR between two 16 bit values and stores the result in the destination
register RD.
NOTE
When using immediate addressing mode (OR RD, #IMM16), the Z-flag of
the first instruction (ORL RD, #IMM16[7:0]) is not considered by the
second instruction (ORH RD, #IMM16[15:8]).
⇒ Don’t rely on the Z-Flag.
CCR Effects
NZVC
∆ ∆ 0—
N: Set if bit 15 of the result is set; cleared otherwise.
Z: Set if the result is $0000; cleared otherwise.
Refer to ORH instruction for #IMM16 operations.
V: 0; cleared.
C: Not affected.
Code and CPU Cycles
Source Form
OR RD, RS1, RS2
OR RD, #IMM16
Address
Mode
TRI
IMM8
IMM8
00010
10100
10101
Machine Code
Cycles
RD
RS1
RS2 1 0
P
RD
IMM16[7:0]
P
RD
IMM16[15:8]
P
MC9S12XE-Family Reference Manual Rev. 1.25
440
Freescale Semiconductor