#[repr(simd)]pub struct __m128(/* private fields */);
Expand description
128-bit wide set of four f32
types, x86-specific
This type is the same as the __m128
type defined by Intel,
representing a 128-bit SIMD register which internally is consisted of
four packed f32
instances. Usage of this type typically corresponds
to the sse
and up target features for x86/x86_64.
Note that unlike __m128i
, the integer version of the 128-bit
registers, this __m128
type has one interpretation. Each instance
of __m128
always corresponds to f32x4
, or four f32
types packed
together.
The in-memory representation of this type is the same as the one of an equivalent array (i.e. the in-memory order of elements is the same, and there is no padding); however, the alignment is different and equal to the size of the type. Note that the ABI for function calls may not be the same.
Most intrinsics using __m128
are prefixed with _mm_
and are
suffixed with “ps” (or otherwise contain “ps”). Not to be confused with
“pd” which is used for __m128d
.
§Examples
#[cfg(target_arch = "x86")]
use std::arch::x86::*;
#[cfg(target_arch = "x86_64")]
use std::arch::x86_64::*;
let four_zeros = _mm_setzero_ps();
let four_ones = _mm_set1_ps(1.0);
let four_floats = _mm_set_ps(1.0, 2.0, 3.0, 4.0);
Trait Implementations§
§impl AsBytes for __m128
impl AsBytes for __m128
§fn as_bytes_mut(&mut self) -> &mut [u8] ⓘwhere
Self: FromBytes,
fn as_bytes_mut(&mut self) -> &mut [u8] ⓘwhere
Self: FromBytes,
§fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>
fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>
§impl FromBytes for __m128
impl FromBytes for __m128
§fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>where
Self: Sized,
fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>where
Self: Sized,
§fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>where
Self: Sized,
fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>where
Self: Sized,
§fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>where
Self: Sized + AsBytes,
fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>where
Self: Sized + AsBytes,
§fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>where
Self: Sized + AsBytes,
fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>where
Self: Sized + AsBytes,
§fn slice_from(bytes: &[u8]) -> Option<&[Self]>where
Self: Sized,
fn slice_from(bytes: &[u8]) -> Option<&[Self]>where
Self: Sized,
§fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>where
Self: Sized,
fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>where
Self: Sized,
bytes
as a &[Self]
with length
equal to count
without copying. Read more§fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>where
Self: Sized,
fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>where
Self: Sized,
bytes
as a &[Self]
with length
equal to count
without copying. Read more§fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>where
Self: Sized + AsBytes,
fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>where
Self: Sized + AsBytes,
§fn mut_slice_from_prefix(
bytes: &mut [u8],
count: usize,
) -> Option<(&mut [Self], &mut [u8])>where
Self: Sized + AsBytes,
fn mut_slice_from_prefix(
bytes: &mut [u8],
count: usize,
) -> Option<(&mut [Self], &mut [u8])>where
Self: Sized + AsBytes,
bytes
as a &mut [Self]
with length
equal to count
without copying. Read more§fn mut_slice_from_suffix(
bytes: &mut [u8],
count: usize,
) -> Option<(&mut [u8], &mut [Self])>where
Self: Sized + AsBytes,
fn mut_slice_from_suffix(
bytes: &mut [u8],
count: usize,
) -> Option<(&mut [u8], &mut [Self])>where
Self: Sized + AsBytes,
bytes
as a &mut [Self]
with length
equal to count
without copying. Read more§fn read_from_prefix(bytes: &[u8]) -> Option<Self>where
Self: Sized,
fn read_from_prefix(bytes: &[u8]) -> Option<Self>where
Self: Sized,
impl Copy for __m128
Auto Trait Implementations§
impl Freeze for __m128
impl RefUnwindSafe for __m128
impl Send for __m128
impl Sync for __m128
impl Unpin for __m128
impl UnwindSafe for __m128
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)