HCS12 datasheet(288/452 Pages) FREESCALE

288 / 452 page

Instruction Glossary

S12CPUV2 Reference Manual, Rev. 4.0

288

Freescale Semiconductor

Operation:

(A : B) – (M : M + 1)

⇒ A : B

Description:

Subtracts the content of memory location M : M + 1 from the content of

double accumulator D and places the result in D. For subtraction

instructions, the C status bit represents a borrow.

SUBD

Subtract Double Accumulator

SUBD

CCR Details:

HIN

––––

∆∆∆∆

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

Z: Set if result is $0000; cleared otherwise

V: D15

• M15 • R15 + D15 • M15 • R15

Set if a two’s complement overflow resulted from the operation;

cleared otherwise

C: D15

• M15 + M15 • R15 + R15 • D15

Set if the value of the content of memory is larger than the value of

the accumulator; cleared otherwise

Source Form

Address

Mode

Object Code

Access Detail

HCS12

M68HC12

SUBD #opr16i

SUBD opr8a

SUBD opr16a

SUBD oprx0_xysp

SUBD oprx9,xyssp

SUBD oprx16,xysp

SUBD [D,xysp]

SUBD [oprx16,xysp]

IMM

DIR

EXT

IDX

IDX1

IDX2

[D,IDX]

[IDX2]

83 jj kk

93 dd

B3 hh ll

A3 xb

A3 xb ff

A3 xb ee ff

A3 xb

A3 xb ee ff

RPf

RPO

RPf

RPO

fRPP

fIfRPf

fIPRPf

RfP

ROP

RfP

RPO

fRPP

fIfRfP

fIPRfP

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