NEC Network Controller uPD98502 - Manual (Page 544)

APPENDIX A MIPS III INSTRUCTION SET DETAILS
544 Preliminary User’s Manual S15543EJ1V0UM
SDR
Store Doubleword Right (2/3)
SDR
An address error exception is not occurred that specify address is not located in doubleword boundary.
This operation is defined in 64-bit mode or in 32-bit kernel mode. Execution of this instruction in 32-bit user or
supervisor mode causes a reserved instruction exception.
Operation:
64 T: vAddr ← ((offset
15
)
48
|| offset
15...0
) + GPR [base]
(pAddr, uncached) ← AddressTranslation (vAddr, DATA)
pAddr ← pAddr
PSIZE - 1...3
|| (pAddr
2...0
xor ReverseEndian
3
)
if BigEndianMem = 0 then
pAddr
← pAddr
PSIZE - 1...3
|| 0 3
endif
byte ← vAddr
2...0
xor BigEndianCPU 3
data ← GPR [rt]
63 – 8 * byte || 0
8 * byte
StoreMemory (uncached, DOUBLEWORD-byte, data, pAddr, vAddr, DATA)