Function _mm_pause

system/include/compat/emmintrin.h:1480–1484

}

static __inline__ void __attribute__((__always_inline__, __nodebug__))
_mm_pause(void)
{
  // No pause/wait instruction in Wasm/SIMD.
}

static __inline__ __m128d __attribute__((__always_inline__, __nodebug__))
_mm_undefined_pd()