Datasheet

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
–
76543210
IDC – IXC UFC OFC DZC IOC