Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
293
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
12.12.2.4 Floating-point Status Control Register
Name:
FPSCR
Access: Read/Write
Reset: 0x000000000
The FPSCR provides all necessary User level control of the floating-point system.
N: Negative Condition Code Flag
Floating-point comparison operations update this flag.
Z: Zero Condition Code Flag
Floating-point comparison operations update this flag.
C: Carry Condition Code Flag
Floating-point comparison operations update this flag.
V: Overflow Condition Code Flag
Floating-point comparison operations update this flag.
AHP: Alternative Half-precision Control
0: IEEE half-precision format selected.
1: Alternative half-precision format selected.
DN: Default NaN Mode Control
0: NaN operands propagate through to the output of a floating-point operation.
1: Any operation involving one or more NaNs returns the Default NaN.
FZ: Flush-to-zero Mode Control
0: Flush-to-zero mode disabled. The behavior of the floating-point system is fully compliant with the IEEE 754 standard.
1: Flush-to-zero mode enabled.
RMode: Rounding Mode Control
The encoding of this field is:
0b00: Round to Nearest (RN) mode
0b01: Round towards Plus Infinity (RP) mode.
31
30
29
28
27
26
25
24
N
Z
C
V
–
AHP
DN
FZ
23
22
21
20
19
18
17
16
RMode
–
15
14
13
12
11
10
9
8
–
7
6
5
4
3
2
1
0
IDC
–
IXC
UFC
OFC
DZC
IOC