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Motorola DSP96002 User Manual

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DSP96002 USER’S MANUAL

MOTOROLA

INTRZ

Floating-Point

INTRZ

to Integer Conversion with Round to Zero

Operation:

Integer(D)

D.L (parallel data bus move)

Assembler Syntax:

INTRZ D
(move syntax - see the Move instruction de-

scription.)

Description:

Convert the specified floating-point operand to 32-bit, 2’s complement integer rounding towards zero. The

result is stored in the low portion of D. The high and middle portions of D remain unchanged. Since this

operation is frequently required (e. g., truncation assignment), this instruction has been implemented to

eliminate the need to change the rounding mode associated with INT.

The following table lists the results for some special cases:

Source operand

Result

Greater than 2

31

- 1

$7FFFFFFF

Less than -2

31

$80000000

+infinity

$7FFFFFFF

-infinity

$80000000

NaN

$FFFFFFFF

Input Operand(s) Precision: SEP Floating-Point.

Output Operand Precision: 32-bit integer.

CCR Condition Codes:

C

- Not affected.

V

- Set if source operand is a NaN, infinity, or its magnitude is too big to be represent-

able in the integer number range. Cleared otherwise.

Z

- Set if result is zero. Cleared otherwise.

N

- Set if source operand is negative. Cleared otherwise.

I

- Set if source operand is infinity. Cleared otherwise.

LR

- Not affected.

R

- Not affected.

A

- Not affected.