Control Register File Extensions

Table 2−15. Floating-Point Auxiliary Configuration Register (FAUCR) Field Descriptions (Continued)

Bit

Field

Value

Description

 

 

 

 

25

UNORD

 

Source to a compare operation for .S2

 

 

0

NaN is not a source to a compare operation.

 

 

1

NaN is a source to a compare operation.

 

 

 

 

24

UND

 

Result underflow status for .S2.

 

 

0

Result does not underflow.

 

 

1

Result underflows.

 

 

 

 

23

INEX

 

Inexact results status for .S2.

 

 

0

 

 

 

1

Result differs from what would have been computed had the exponent range

 

 

 

and precision been unbounded; never set with INVAL.

 

 

 

 

22

OVER

 

Result overflow status for .S2.

 

 

0

Result does not overflow.

 

 

1

Result overflows.

 

 

 

 

21

INFO

 

Signed infinity for .S2.

 

 

0

Result is not signed infinity.

 

 

1

Result is signed infinity.

 

 

 

 

20

INVAL

 

 

0A signed NaN (SNaN) is not a source.

1A signed NaN (SNaN) is a source. NaN is a source in a floating-point to integer conversion or when infinity is subtracted from infinity.

19

DEN2

Denormalized number select for .S2 src2.

0src2 is not a denormalized number.

1src2 is a denormalized number.

18

DEN1

Denormalized number select for .S2 src1.

0src1 is not a denormalized number.

1src1 is a denormalized number.

2-28

CPU Data Paths and Control

SPRU733

Page 54
Image 54
Texas Instruments TMS320C67X/C67X+ DSP manual Und