title: How do I know which AVX C functions are available on different processor models
body: <p>Basically the title. For example, I am trying to run instructions like:</p>
  <p><code>_mm256_load_pd</code>, <code>_mm256_add_pd</code>, <code>_mm256_stream_pd</code> and the 128 bits version on the processor: Intel Xeon, E5630, 2.53 GHz, IBM HS22. But I am getting <code>Illegal instruction</code> any idea for a site where I could see which functions are available for this processor?</p>