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Sub subtract sub – Motorola DSP96002 User Manual

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MOTOROLA

DSP96002 USER’S MANUAL

A - 305

SUB

Subtract

SUB

Instruction Fields:

(u u)

D

d d d

Dn.L

n n n

where nnn = 0-7

S

s s s

Dn.L

n n n

where nnn = 0-7

Timing: 2 + mv oscillator clock cycles

Memory: 1 + mv program words

Operation:

D.L - S.L

D.L (parallel data bus move)

Assembler Syntax:

SUB S,D
(move syntax - see the Move instruction de-

scription.)

Description:

Subtract the low portion of the specified source operand S from the low portion of the destination operand

D and store the result in the low portion of D.

Input Operand(s) Precision: 32-bit integer.

Output Operand Precision: 32-bit integer.

CCR Condition Codes:

C

- Set if a borrow is generated from the MSB of the result. Cleared otherwise.

V

- Set if result overflows. Cleared otherwise.

Z

- Set if result is zero. Cleared otherwise.

N

- Set if result is negative. Cleared otherwise.

I

- Not affected.

LR

- Not affected.

R

- Not affected.

A

- Not affected.

ER Status Bits: Not affected.

IER Flags: Not affected.

Instruction Format: SUB S,D (move syntax - see the Move instruction description.)

00

1sss

uu00

1ddd

31

14 13

0

OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA

DATA BUS MOVE FIELD