/* Normal sum of four ymm registers */
#define gmx_mm_sum4_pd(t0, t1, t2, t3) _mm_add_pd(_mm_add_pd(t0, t1), _mm_add_pd(t2, t3))
/* Normal sum of four ymm registers */
#define gmx_mm_sum4_pd(t0, t1, t2, t3) _mm_add_pd(_mm_add_pd(t0, t1), _mm_add_pd(t2, t3))