APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary Users Manual S15543EJ1V0UM 539
SD Store Doubleword SD
base

SD

1 1 1 1 1 1 rt offset

31 26 25 21 20 16 15 0
655 16
Format:
SD rt, offset (base)
Description:
The 16-bit
offset
is sign-extended and added to the contents of general register
base
to form a virtual address.
The contents of general register
rt
are stored at the memory location specified by the effective address.
If either of the three least-significant bits of the effective address are non-zero, an address error exception occurs.
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 ((offset15)48 || offset15...0) + GPR [base]
(pAddr, uncached) AddressTranslation (vAddr, DATA)
data GPR [rt]
StoreMemory (uncached, DOUBLEWORD, data, pAddr, vAddr, DATA)
Exceptions:
TLB refill exception
TLB invalid exception
TLB modification exception
Bus error exception
Address error exception
Reserved instruction exception (32-bit user mode/supervisor mode)