Struct z80emu::CpuFlags

pub struct CpuFlags(/* private fields */);

Z80 Cpu Flags.

Implementations

impl CpuFlags

pub const C: Self = _

Carry Flag.

pub const N: Self = _

Add/Subtract Flag.

pub const PV: Self = _

Parity/Overflow Flag.

pub const X: Self = _

Undocumented bit 3 of the Flag.

pub const H: Self = _

Half Carry Flag.

pub const Y: Self = _

Undocumented bit 5 of the Flag.

pub const Z: Self = _

Zero Flag.

pub const S: Self = _

Sign Flag.

impl CpuFlags

pub const fn empty() -> Self

Get a flags value with all bits unset.

pub const fn all() -> Self

Get a flags value with all known bits set.

pub const fn bits(&self) -> u8

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u8) -> Option<Self>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u8) -> Self

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u8) -> Self

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: Self) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

pub const fn contains(&self, other: Self) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

pub fn insert(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

pub fn remove(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

pub fn set(&mut self, other: Self, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

pub const fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

pub const fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

pub const fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl CpuFlags

pub const fn iter(&self) -> Iter<CpuFlags>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<CpuFlags>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

impl CpuFlags

pub const P: Self = _

An alias of CpuFlags::PV.

pub const V: Self = _

An alias of CpuFlags::PV.

pub const XY: Self = _

A mask of both undocumented Flag’s bits 3 and 5. CpuFlags::X | CpuFlags::Y.

pub const HMASK: Self = _

A mask over bits 0 to 3 being used to detect half-byte carry.

pub fn reset(&mut self)

Resets all CpuFlags to false.

pub fn sf(self) -> bool

Returns a value of the Sign Flag.

pub fn zf(self) -> bool

Returns a value of the Zero Flag.

pub fn hf(self) -> bool

Returns a value of the Half Carry Flag.

pub fn pvf(self) -> bool

Returns a value of the Parity/Overflow Flag.

pub fn nf(self) -> bool

Returns a value of the Add/Subtract Flag.

pub fn cf(self) -> bool

Returns a value of the Carry Flag.

pub fn mask_cvz(cf: bool, vf: bool, zf: bool) -> Self

Returns a new instance of CpuFlags with Flags C | V | Z where each Flag is set depending on the value being given in the arguments.

pub fn mask_sign(res: u8) -> Self

Returns a new instance of CpuFlags with the S Flag being set depending on the top-most bit of the given 8-bit unsigned value being set.

pub fn mask_zero(res: u8) -> Self

Returns a new instance of CpuFlags with the Z Flag being set depending on the given value being equal to 0 (zero).

pub fn mask_carry(cf: bool) -> Self

Returns a new instance of CpuFlags with the C Flag being set depending on the given value.

pub fn mask_nf(nf: bool) -> Self

Returns a new instance of CpuFlags with the N Flag being set depending on the given value.

pub fn mask_hf(hf: bool) -> Self

Returns a new instance of CpuFlags with the H Flag being set depending on the given value.

pub fn mask_hcf(hcf: bool) -> Self

Returns a new instance of CpuFlags with Flags C | H being set depending on the given value.

pub fn mask_pvf(pvf: bool) -> Self

Returns a new instance of CpuFlags with the PV Flag being set depending on the given value.

pub fn parity(res: u8) -> Self

Returns a new instance of CpuFlags with the PV Flag being set if the number of bits equal to 1 is even in the given value.

pub fn mask_xy(res: u8) -> Self

Returns a new instance of CpuFlags with Flags X | Y being set depending on the bit value 3 for X and 5 for Y in the given argument.

pub fn mask_sxy(res: u8) -> Self

Returns a new instance of CpuFlags with Flags S | X | Y being set depending on the bit value 7 for S, 3 for X and 5 for Y in the given argument.

Trait Implementations

impl Binary for CpuFlags

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

Formats the value using the given formatter.

impl BitAnd for CpuFlags

fn bitand(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

type Output = CpuFlags

The resulting type after applying the & operator.

impl BitAndAssign for CpuFlags

fn bitand_assign(&mut self, other: Self)

The bitwise and (&) of the bits in two flags values.

impl BitOr for CpuFlags

fn bitor(self, other: CpuFlags) -> Self

The bitwise or (|) of the bits in two flags values.

type Output = CpuFlags

The resulting type after applying the | operator.

impl BitOrAssign for CpuFlags

fn bitor_assign(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

impl BitXor for CpuFlags

fn bitxor(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

type Output = CpuFlags

The resulting type after applying the ^ operator.

impl BitXorAssign for CpuFlags

fn bitxor_assign(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

impl Clone for CpuFlags

fn clone(&self) -> CpuFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CpuFlags

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

Formats the value using the given formatter.

impl Default for CpuFlags

fn default() -> CpuFlags

Returns the “default value” for a type.

impl Extend<CpuFlags> for CpuFlags

fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for CpuFlags

const FLAGS: &'static [Flag<CpuFlags>] = _

The set of defined flags.

type Bits = u8

The underlying bits type.

fn bits(&self) -> u8

Get the underlying bits value.

fn from_bits_retain(bits: u8) -> CpuFlags

Convert from a bits value exactly.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in two flags values.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

impl FromIterator<CpuFlags> for CpuFlags

fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

The bitwise or (|) of the bits in each flags value.

impl Hash for CpuFlags

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IntoIterator for CpuFlags

type Item = CpuFlags

The type of the elements being iterated over.

type IntoIter = Iter<CpuFlags>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl LowerHex for CpuFlags

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

Formats the value using the given formatter.

impl Not for CpuFlags

fn not(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

type Output = CpuFlags

The resulting type after applying the ! operator.

impl Octal for CpuFlags

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

Formats the value using the given formatter.

impl Ord for CpuFlags

fn cmp(&self, other: &CpuFlags) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for CpuFlags

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

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for CpuFlags

fn partial_cmp(&self, other: &CpuFlags) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl PublicFlags for CpuFlags

type Primitive = u8

The type of the underlying storage.

type Internal = InternalBitFlags

The type of the internal field on the generated flags type.

impl Sub for CpuFlags

fn sub(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = CpuFlags

The resulting type after applying the - operator.

impl SubAssign for CpuFlags

fn sub_assign(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl UpperHex for CpuFlags

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

Formats the value using the given formatter.

impl Copy for CpuFlags

impl Eq for CpuFlags

impl StructuralPartialEq for CpuFlags