Encoding:

SPECIAL

000000

rs

rt

rd

0000

R

1

SRLV

000110

6

5

5

5

4

1

6

Format: 

ROTRV rd, rt, rs

SmartMIPS Crypto

Rotate Word Right Variable

Purpose:

Rotate Word Right Variable

To execute a logical right-rotate of a word by a variable number of bits

Description: 

GPR[rd] = GPR[rt] ↔ (right) GPR[rs]

The contents ofthe low-order 32-bit word of GPR rt are rotated right;the word resultis placed in GPR rd. The bit-rotate amount is specified by the low-order 5 bits of GPR rs.

Restrictions:

Operation: 

if ((ArchitectureRevision() < 2) and (Config3SM= 0)) then
   UNPREDICTABLE
endif
s = GPR[rs]4..0
temp = GPR[rt]s-1..0 || GPR[rt]31..s
GPR[rd] = temp

Exceptions:

Reserved Instruction