How do you load/store from/to an array of doubles with GNU C Vector Extensions?

Question

I\'m using GNU C Vector Extensions, not Intel\'s _mm_* intrinsics.

I want to do the same thing as Intel\'s _m256_loadu_pd intrinsic. Assign

Answer 1

You can use the equivalent intrinsics from gcc for x86: __builtin_ia32_loadupd256 (https://gcc.gnu.org/onlinedocs/gcc/x86-Built-in-Functions.html#x86-Built-in-Functions).

So something like:

typedef double v4df __attribute__((vector_size(4 * sizeof(double))));

void vector_copy(double *a, v4df *v)
{
    *v = __builtin_ia32_loadupd256(a);
}