This type is the same as the __m256i type defined in lasxintrin.h,
representing a 256-bit SIMD register. Usage of this type typically
occurs in conjunction with the lasx target features for LoongArch.
Internally this type may be viewed as:
i8x32 - thirty two i8 values packed together
i16x16 - sixteen i16 values packed together
i32x8 - eight i32 values packed together
i64x4 - four i64 values 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 m256i typically just means
a “bag of bits” which is left up to interpretation at the point of use.
Most intrinsics using m256i are prefixed with lasx_ and the integer
types tend to correspond to suffixes like “b”, “h”, “w” or “d”.