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Table 2–8. Floating-Point Adder Configuration Register Field Descriptions
Bit Position
Width
31–27
5
26–25
2
24
1
23
1
22
1
21
1
20
1
19
1
18
1
17
1
16
1
15–11
5
10–9
2
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
1
Field Name
Function
Reserved
Rmode .L2
Value 00: Round toward nearest representable floating-point number
Value 01: Round toward 0 (truncate)
Value 10: Round toward infinity (round up)
Value 11: Round toward negative infinity (round down)
UNDER .L2
Set to 1 when result underflows
INEX .L2
Set to 1 when result differs from what would have been computed had
the exponent range and precision been unbounded; never set with
INVAL
OVER .L2
Set to 1 when result overflows
INFO .L2
Set to 1 when result is signed infinity
INVAL .L2
Set to 1 when a signed NaN (SNaN) is a source, NaN is a source in
a floating-point to integer conversion, or when infinity is subtracted
from infinity
DEN2 .L2
src2 is a denormalized number
src1 is a denormalized number
DEN1 .L2
NAN2 .L2
src2 is NaN
NAN1 .L2
src1 is NaN
Reserved
Rmode .L1
Value 00: Round toward nearest even representable floating-point
number
Value 01: Round toward 0 (truncate)
Value 10: Round toward infinity (round up)
Value 11: Round toward negative infinity (round down)
UNDER .L1
Set to 1 when result underflows
INEX .L1
Set to 1 when result differs from what would have been computed had
the exponent range and precision been unbounded; never set with
INVAL
OVER .L1
Set to 1 when result overflows
INFO .L1
Set to 1 when result is signed infinity
INVAL .L1
Set to 1 when a signed NaN is a source, NaN is a source in a floating-
point to integer conversion, or when infinity is subtracted from infinity
src2 is a denormalized number
DEN2 .L1
DEN1 .L1
src1 is a denormalized number
NAN2 .L1
src2 is NaN
NAN1 .L1
src1 is NaN
TMS320C67x Extensions to the Control Register File
CPU Data Paths and Control
2-15
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