James Cloos <cloos@xxxxxxxxxxx> writes: >>>>>> "ILT" == Ian Lance Taylor <iant@xxxxxxxxxx> writes: > > ILT> The gcc documentation does not document the use of the Intel > ILT> intrinsics. They are documented by Intel. > > I was thinking of (gcc.info.bz2)X86 Built-in Functions, documenting such > builtins as v2df __builtin_ia32_hsubpd (v2df, v2df) and the like. Ah, sorry, I misunderstand. For the Intel intrinsics, use __m64 and friends. For the __builtin_ia32 functions, it's OK to use __v2df and friends. Really it doesn't matter too much. But frankly I recommend using the Intel intrinsics instead. They are easier to understand and use correctly. Ian