Function core::arch::riscv64::frflags

pub fn frflags() -> u32

🔬 This is a nightly-only experimental API. (stdsimd #48556)

This is supported on target_arch="riscv64" only.

Reads the floating-point accrued exception flags register fflags

The accrued exception flags indicate the exception conditions that have arisen on any floating-point arithmetic instruction since the field was last reset by software.

Accoding to “F” Standard Extension for Single-Precision Floating-Point, Version 2.2, the accured exception flags is defined as a bit vector of 5 bits. The meaning of each binary bit is listed in the table below.

Bit index	Mnemonic	Meaning
4	NV	Invalid Operation
3	DZ	Divide by Zero
2	OF	Overflow
1	UF	Underflow
0	NX	Inexact