Finds SIMD intrinsics calls and suggests
If the option
Suggest is set to non-zero, for
_mm_add_epi32(a, b); // x86 vec_add(a, b); // Power
the check suggests an alternative:
Otherwise, it just complains the intrinsics are non-portable (and there are P0214 alternatives).
Many architectures provide SIMD operations (e.g. x86 SSE/AVX, Power AltiVec/VSX, ARM NEON). It is common that SIMD code implementing the same algorithm, is written in multiple target-dispatching pieces to optimize for different architectures or micro-architectures.
The C++ standard proposal P0214 and its extensions cover many common SIMD operations. By migrating from target-dependent intrinsics to P0214 operations, the SIMD code can be simplified and pieces for different targets can be unified.
Refer to P0214 for introduction and motivation for the data-parallel standard library.
If this option is set to non-zero (default is 0), the check will suggest P0214 alternatives, otherwise it only points out the intrinsic function is non-portable.