APPENDIX A MIPS III INSTRUCTION SET DETAILS
Preliminary Users Manual S15543EJ1V0UM 485
DSLLV Doubleword Shift Left Logical Va riable DSLLV
rs
SPECIAL
0 0 0 0 0 0 rt rd 0
0 0 0 0 0
DSLLV
0 1 0 1 0 0
31 26 25 21 20 16 15 11 10 6 5 0
6 5555 6
Format:
DSLLV rd, rt, rs
Description:
The contents of general register
rt
are shifted left by the number of bits specified by the low-order six bits contained
in general register
rs
, 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 GPR [rs]5..0
GPR [rd] GPR [rt](63 - s)..0 || 0s
Exceptions:
Reserved instruction exception (32-bit user mode/supervisor mode)