Nec Network Controller uPD98502 Manual de usuario Pagina 553

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APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary Users Manual S15543EJ1V0UM
553
SRA
Shift Right Arithmetic
SRA
0
0 0 0 0 0
SPECIAL
0 0 0 0 0 0
rt rd sa
SRA
0 0 0 0 1 1
31 26 25 21 20 16 15 11 10 6 5 0
6 5555 6
Format:
SRA rd, rt, sa
Description:
The contents of general register
rt
are shifted right by
sa
bits, sign-extending the high-order bits.
The result is placed in register
rd
.
In 64-bit mode, the operand must be a valid sign-extended, 32-bit value.
Operation:
32 T:
GPR [rd] (GPR [rt]
31
)
sa
|| GPR [rt]
31...sa
64 T:
s 0 || sa
temp (GPR [rt]
31
)
s
|| GPR [rt]
31...s
GPR [rd]
(temp
31
)
32
|| temp
Exceptions:
None
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