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Floor extract the integer part floor – Motorola DSP96002 User Manual

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DSP96002 USER’S MANUAL

MOTOROLA

FLOOR

Extract the Integer Part

FLOOR

Operation:

S

ROUND TO INTEGER

D

(parallel data bus move)

Assembler Syntax:

FLOOR S,D (move syntax - see the MOVE in-

struction description.)

Description:

Round the floating-point source operand S to an integer value using the round to minus infinity mode and

store the result as a floating-point number in the specified destination D. The rounding precision is always

SEP. FLOOR is equivalent to FINT with R1, R0 in the IER set to select minus infinity; however, the round-

ing mode does not need to be saved, changed, and recalled. This is particularly useful when using C since

FLOOR is a standard C function.

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

Output Operand Precision: SEP Floating-Point.

CCR Condition Codes:

C

- Not affected.

V

- Not affected.

Z

- Set if result is zero. Cleared otherwise.

N

- Set if result is negative. Cleared otherwise.

I

- Set if result is infinity. Cleared otherwise.

LR

- Not affected.

R

- Not affected.

A

- Not affected.

ER Status Bits:

INX

-Set if result is inexact. Cleared otherwise.

DZ

-Always cleared.

UNF

-Always cleared.

OVF

-Always cleared.

OPERR-Always cleared.

SNAN -Set if operand is a signaling NaN. Cleared otherwise.

NAN

-Set if result is a NaN. Cleared otherwise.

UNCC -Always cleared.