IEEE_STATUS_MASK
swcr &= ~IEEE_STATUS_MASK;
swcr |= (fpcr >> 35) & IEEE_STATUS_MASK;
sw = (fp >> 35) & IEEE_STATUS_MASK;
IEEE_STATUS_MASK | IEEE_MAP_MASK)
fp = (sw & IEEE_STATUS_MASK) << 35;
fp |= (sw & IEEE_STATUS_MASK ? FPCR_SUM : 0);
exc &= IEEE_STATUS_MASK;