#[repr(simd)]pub struct __m128(/* private fields */);Available on x86-64 only.
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