
APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary User’s 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
←
((offset
15
)
48
|| offset
15...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)
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