QCDS
#ifndef QCDS
void * ptrs[QCDS / sizeof (void *)]; /* (assume) one pointer */
uint64_t llongs[QCDS / sizeof (uint64_t)]; /* one long long */
uint32_t longs[QCDS / sizeof (uint32_t)]; /* two longs */
uint16_t shorts[QCDS / sizeof (uint16_t)]; /* four shorts */
uint8_t bytes[QCDS]; /* eight bytes */