
APPENDIX A MIPS III INSTRUCTION SET DETAILS
484
Preliminary User’s Manual S15543EJ1V0UM
DSLL
Doubleword Shift Left Logical
DSLL
0
0 0 0 0 0
SPECIAL
0 0 0 0 0 0
rt rd sa
DSLL
1 1 1 0 0 0
31 26 25 21 20 16 15 11 10 6 5 0
6 5555 6
Format:
DSLL rd, rt, sa
Description:
The contents of general register
rt
are shifted left by
sa
bits, inserting zeros into the low-order bits. The result is
placed in register
rd.
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:
s ← 0 || sa
GPR [rd] ← GPR [rt]
(63 - s)..0
|| 0
s
Exceptions:
Reserved instruction exception (32-bit user mode/supervisor mode)
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