- asm volatile(
- " slr %N1,%N1\n" /* %0 = H L */
- " lr %1,%0\n" /* %0 = H L, %1 = H L 0 0 */
- " srdl %1,16\n" /* %0 = H L, %1 = 0 H L 0 */
- " alr %1,%N1\n" /* %0 = H L, %1 = L H L 0 */
- " alr %0,%1\n" /* %0 = H+L+C L+H */
- " srl %0,16\n" /* %0 = H+L+C */
- : "+&d" (sum), "=d" (rp) : : "cc");
-#else /* __s390x__ */
- asm volatile(
- " sr 3,3\n" /* %0 = H*65536 + L */
- " lr 2,%0\n" /* %0 = H L, 2/3 = H L / 0 0 */
- " srdl 2,16\n" /* %0 = H L, 2/3 = 0 H / L 0 */
- " alr 2,3\n" /* %0 = H L, 2/3 = L H / L 0 */
- " alr %0,2\n" /* %0 = H+L+C L+H */
- " srl %0,16\n" /* %0 = H+L+C */
- : "+&d" (sum) : : "cc", "2", "3");
-#endif /* __s390x__ */
- return (__force __sum16) ~sum;