Hard to debug swizzle mask constant type

[AntoinePrv]

swizzle has pretty weak mask type constraint

xsimd/include/xsimd/types/xsimd_api.hpp

Line 2411 in d92c6d4

swizzle(batch<T, A> const& x, batch_constant<Vt, A, Values...> mask) noexcept

But (at least some) kernels require it to be an unsigned integer type. On MSVC I ran into a compiler error when using signed integers in the mask.

xsimd/include/xsimd/arch/xsimd_avx2.hpp

Line 907 in d92c6d4

XSIMD_INLINE batch<float, A> swizzle(batch<float, A> const& self, batch<uint32_t, A> mask, requires_arch<avx2>) noexcept

A possible solution could be to replace Vt with as_unsigned_integer_t<T>. In term of breakage, this moves the implicit conversion from xsimd to user code.

This may concern shuffle too.

[serge-sans-paille]

I've added a static_assert in #1137. Please tell me if this matches your needs

[AntoinePrv]

That works yes