HCS12 datasheet(154/452 Pages) FREESCALE

154 / 452 page

S12CPUV2 Reference Manual, Rev. 4.0

154

Freescale Semiconductor

Operation:

(M) = $FF – (M)

⇒ M

Description:

Replaces the content of memory location M with its one’s complement.

Each bit of M is complemented. Immediately after a COM operation on

unsigned values, only the BEQ, BNE, LBEQ, and LBNE branches can be

expected to perform consistently. After operation on two’s complement

values, all signed branches are available.

COM

Complement Memory

COM

CCR Details:

HIN

––––

∆∆

N: Set if MSB of result is set; cleared otherwise

Z: Set if result is $00; cleared otherwise

V: 0; cleared

C: 1; set (for M6800 compatibility)

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

COM opr16a

COM oprx0_xysp

COM oprx9

,xysp

COM oprx16

,xysp

COM [D

,xysp]

COM [oprx16

,xysp]

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

71 hh ll

61 xb

61 xb ff

61 xb ee ff

61 xb

61 xb ee ff

rPwO

rPw

rPwO

frPwP

fIfrPw

fIPrPw

rOPw

rPw

rPOw

frPPw

fIfrPw

fIPrPw

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