On Wed, 20 Feb 2019, Warren D Smith wrote:
> but if I try to replace that with the nicer (since more portable)
>c = __builtin_shuffle(a, b);
> then
> error: use of unknown builtin '__builtin_shuffle'
> [-Wimplicit-function-declaration]
Most likely you're on OS X and the 'gcc' command actually
On 2/18/19, Andrew Pinski wrote:
> GCC already has most of this support. See
> https://gcc.gnu.org/onlinedocs/gcc-8.2.0/gcc/Vector-Extensions.html#Vector-Extensions
>
> The dot in the typenames are not going to supported though.
>
> Thanks,
> Andrew
--what #include files and/or compiler flags ar
On Mon, Feb 18, 2019 at 11:15 AM Warren D Smith wrote:
>
> There are a lot of weird intel vector instructions like
> #include
>
> __m128i alignas(16) A, B, C, D, X, Y;
> A = _mm_shuffle_epi8(D, Y);
> C = _mm_unpackhi_epi16(A, B);
> where my gcc seems to know about the latter but not the former
>
There are a lot of weird intel vector instructions like
#include
__m128i alignas(16) A, B, C, D, X, Y;
A = _mm_shuffle_epi8(D, Y);
C = _mm_unpackhi_epi16(A, B);
where my gcc seems to know about the latter but not the former
(I have no idea why, and it is very annoying to arbitrarily support the s
