TMS320C67x Extensions to the Control Register File
2.7.3
Floating-Point Multiplier Configuration Register (FMCR)
Figure 2–9. Floating-Point Multiplier Configuration Register (FMCR)
Fields used by .M2
Fields used by .M1
2-18
The floating-point multiplier configuration register (FMCR) contains fields that
specify underflow or overflow, the rounding mode, NaNs, denormalized num-
bers, and inexact results for instructions that use the .M functional units. FMCR
has a set of fields specific to each of the .M units, .M1 and .M2. Figure 2–9
shows the layout of FMCR. The functions of the fields in the FMCR are shown
in Table 2–10.
31
27 26 25
Reserved
RMode
R, +0
15
11 10
9
Reserved
RMode
R, +0
Legend: R
Readable by the MVC instruction
W
Writeable by the MVC instruction
+0
Value is zero after reset
21
24
23
22
INFO
UNDER
INEX OVER
8
7
6
5
UNDER
INEX OVER
INFO
19
20
18
17
INVAL
DEN2
DEN1
NAN2
R, W, +0
3
4
2
INVAL
DEN2
DEN1
NAN2
R, W, +0
16
NAN1
0
1
NAN1