This type is the same as the __m512i type defined by Intel,
representing a 512-bit SIMD register. Usage of this type typically
corresponds to the avx512* and up target features for x86/x86_64.
Internally this type may be viewed as:
i8x64 - sixty-four i8 variables packed together
i16x32 - thirty-two i16 variables packed together
i32x16 - sixteen i32 variables packed together
i64x8 - eight i64 variables packed together
(as well as unsigned versions). Each intrinsic may interpret the
internal bits differently, check the documentation of the intrinsic
to see how it’s being used.
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.
Note that this means that an instance of __m512i typically just means
a “bag of bits” which is left up to interpretation at the point of use.