extern void abort (void); extern int memcmp (const void *, const void *, __SIZE_TYPE__); typedef unsigned char v8qi __attribute__((vector_size(8))); v8qi foo(v8qi x, v8qi y) { return x * y; } int main() { v8qi a = { 1, 2, 3, 4, 5, 6, 7, 8 }; v8qi b = { 3, 3, 3, 3, 3, 3, 3, 3 }; v8qi c = { 3, 6, 9, 12, 15, 18, 21, 24 }; v8qi r; r = foo (a, b); if (memcmp (&r, &c, 8) != 0) abort (); return 0; }