Struct cretonne_codegen::ir::types::Type
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pub struct Type(_);
The type of an SSA value.
The VOID
type is only used for instructions that produce no value. It can't be part of a SIMD
vector.
Basic integer types: I8
, I16
, I32
, and I64
. These types are sign-agnostic.
Basic floating point types: F32
and F64
. IEEE single and double precision.
Boolean types: B1
, B8
, B16
, B32
, and B64
. These all encode 'true' or 'false'. The
larger types use redundant bits.
SIMD vector types have power-of-two lanes, up to 256. Lanes can be any int/float/bool type.
Methods
impl Type
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pub fn lane_type(self) -> Self
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Get the lane type of this SIMD vector type.
A lane type is the same as a SIMD vector type with one lane, so it returns itself.
pub fn log2_lane_bits(self) -> u8
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Get log_2 of the number of bits in a lane.
pub fn lane_bits(self) -> u8
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Get the number of bits in a lane.
pub fn int(bits: u16) -> Option<Self>
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Get an integer type with the requested number of bits.
pub fn as_bool_pedantic(self) -> Self
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Get a type with the same number of lanes as this type, but with the lanes replaced by booleans of the same size.
Scalar types are treated as vectors with one lane, so they are converted to the multi-bit boolean types.
pub fn as_bool(self) -> Self
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Get a type with the same number of lanes as this type, but with the lanes replaced by booleans of the same size.
Scalar types are all converted to b1
which is usually what you want.
pub fn half_width(self) -> Option<Self>
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Get a type with the same number of lanes as this type, but with lanes that are half the number of bits.
pub fn double_width(self) -> Option<Self>
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Get a type with the same number of lanes as this type, but with lanes that are twice the number of bits.
pub fn is_void(self) -> bool
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Is this the VOID type?
pub fn is_special(self) -> bool
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Is this a special type?
pub fn is_lane(self) -> bool
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Is this a lane type?
This is a scalar type that can also appear as the lane type of a SIMD vector.
pub fn is_vector(self) -> bool
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Is this a SIMD vector type?
A vector type has 2 or more lanes.
pub fn is_bool(self) -> bool
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Is this a scalar boolean type?
pub fn is_int(self) -> bool
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Is this a scalar integer type?
pub fn is_float(self) -> bool
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Is this a scalar floating point type?
pub fn is_flags(self) -> bool
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Is this a CPU flags type?
pub fn log2_lane_count(self) -> u8
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Get log_2 of the number of lanes in this SIMD vector type.
All SIMD types have a lane count that is a power of two and no larger than 256, so this will be a number in the range 0-8.
A scalar type is the same as a SIMD vector type with one lane, so it returns 0.
pub fn lane_count(self) -> u16
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Get the number of lanes in this SIMD vector type.
A scalar type is the same as a SIMD vector type with one lane, so it returns 1.
pub fn bits(self) -> u16
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Get the total number of bits used to represent this type.
pub fn bytes(self) -> u32
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Get the number of bytes used to store this type in memory.
pub fn by(self, n: u16) -> Option<Self>
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Get a SIMD vector type with n
times more lanes than this one.
If this is a scalar type, this produces a SIMD type with this as a lane type and n
lanes.
If this is already a SIMD vector type, this produces a SIMD vector type with n * self.lane_count()
lanes.
pub fn half_vector(self) -> Option<Self>
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Get a SIMD vector with half the number of lanes.
There is no double_vector()
method. Use t.by(2)
instead.
pub fn index(self) -> usize
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Index of this type, for use with hash tables etc.
pub fn wider_or_equal(self, other: Self) -> bool
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True iff:
self.lane_count() == other.lane_count()
andself.lane_bits() >= other.lane_bits()
Trait Implementations
impl Copy for Type
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impl Clone for Type
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fn clone(&self) -> Type
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl PartialEq for Type
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fn eq(&self, __arg_0: &Type) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &Type) -> bool
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This method tests for !=
.
impl Eq for Type
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impl Hash for Type
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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
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Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl Display for Type
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fn fmt(&self, f: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Debug for Type
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fn fmt(&self, f: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more