Enum simple_soft_float::ExceptionHandlingMode

#[repr(u8)]
pub enum ExceptionHandlingMode {
    IgnoreExactUnderflow,
    SignalExactUnderflow,
}

Select if the underflow exception should be signaled when the result is exact.

In IEEE 754, when exceptions are set to use the default handlers (they are ignored -- the default for most programming languages), then underflow exceptions are only signalled when the result is not exact.

When exceptions are instead set to trap, then underflow exceptions are signalled even when the result is exact, to allow the exception handler to emulate flush-to-zero FP semantics.

Since simple-soft-float doesn't support trapping exceptions, to simulate trapping exceptions, use SignalExactUnderflow as the exception handling mode and check status_flags after every operation.

Otherwise, use the default value of IgnoreExactUnderflow.

Variants

IgnoreExactUnderflow

Use the default behavior of ignoring exact underflow.

SignalExactUnderflow

Signal the UNDERFLOW exception even if the results are exact.

Trait Implementations

impl Clone for ExceptionHandlingMode

fn clone(&self) -> ExceptionHandlingMode

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ExceptionHandlingMode

impl Debug for ExceptionHandlingMode

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for ExceptionHandlingMode

fn default() -> ExceptionHandlingMode

Returns the "default value" for a type.

impl Eq for ExceptionHandlingMode

impl Hash for ExceptionHandlingMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl PartialEq<ExceptionHandlingMode> for ExceptionHandlingMode

fn eq(&self, other: &ExceptionHandlingMode) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralEq for ExceptionHandlingMode

impl StructuralPartialEq for ExceptionHandlingMode