beautypg.com

Neg negate neg – Motorola DSP96002 User Manual

Page 469

background image

MOTOROLA

DSP96002 USER’S MANUAL

A - 281

NEG

Negate

NEG

Instruction Fields:

(u u)

D

d d d

Dn.L

n n n

where nnn = 0-7

Timing: 2 + mv oscillator clock cycles

Memory: 1 + mv program words

10

0101

uu11

1ddd

31

14 13

0

OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA

DATA BUS MOVE FIELD

Operation:

0 - D.L

D.L (parallel data bus move)

Assembler Syntax:

NEG D
( See the MOVE instruction description.)

Description:

The low portion of the destination operand is subtracted from zero. The result is stored in the low portion

of D. This instruction is preferable to using the SUB instruction since it is not necessary to zero an input

operand.

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: NEG D ( See the MOVE instruction description.)