Function anyzero_ps

test/pthread/test_pthread_mandelbrot.cpp:160–167

Not strictly correct anyzero_ps, but faster, and depends on that color alpha channel is always either 0xFF or 0.

#ifdef __SSE__
// Not strictly correct anyzero_ps, but faster, and depends on that color alpha channel is always either 0xFF or 0.
int anyzero_ps(__m128 m)
{
  __m128 y = _mm_shuffle_ps(m, m, _MM_SHUFFLE(2,3,0,1));
  m = _mm_and_ps(m, y);
  __m128 z = _mm_movehl_ps(m, m);
  m = _mm_and_ps(m, z);
  return _mm_ucomige_ss(m, m);
}

int any_ps(__m128 m)
{