LDBL_LEAST_SIGNIF_U
lx = LDBL_LEAST_SIGNIF_U(x);
n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */
lx = LDBL_LEAST_SIGNIF_U(x);
n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */
lx = LDBL_LEAST_SIGNIF_U(x);
n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */
lx = LDBL_LEAST_SIGNIF_U(x);
n = LDBL_LEAST_SIGNIF_U(z) & 7; /* 3 LSb of z */
n = LDBL_LEAST_SIGNIF_U(y) & 7; /* 3 LSb of z */