Builtin SIMD intrinsics
Source: core/_simd.d
Create a vector type.
Parameters: T = one of double2, float4, void16, byte16, ubyte16, short8, ushort8, int4, uint4, long2, ulong2. For 256 bit vectors, one of double4, float8, void32, byte32, ubyte32, short16, ushort16, int8, uint8, long4, ulong4