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Flag

olympia_engine::registers

Enum Flag 

Source 
pub enum Flag {
    Zero,
    AddSubtract,
    HalfCarry,
    Carry,
}
Expand description

Represents a CPU flag set after some instructions.

Note that many instructions leave flags alone, and others may repurpose them for side channel information.

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Zero

The last arithmetic operation resulted in 0

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AddSubtract

The last arithmetic operation was a subtract type operation 0 = Add, 1 = Sub

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HalfCarry

The last arithmetic operation contained a carry between nibbles

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Carry

The last arithmetic operation overflowed or underflowed

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impl Flag

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pub fn bit(&self) -> u8

Returns which bit of the flag register represents this flag

Auto Trait Implementations§

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impl Freeze for Flag

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impl RefUnwindSafe for Flag

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impl Send for Flag

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impl Sync for Flag

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impl Unpin for Flag

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impl UnsafeUnpin for Flag

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impl UnwindSafe for Flag

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.