ROL - RISC-V instruction reference

rolRotate left 
Rotates t2 left by the amount in the low bits of t3 and stores the result in t1.
RISC-V manual: rol 
Forms  rol , ,   
Operands t1 Any integer register, x0 to x31, or its named alias, such as zero, t0 or t6. 
t2 An integer register. It may be the same register as t1. 
t3 An integer register. It may be the same register as t1. 
 .text
li t0, 13
li t1, 2
# t0=13, t1=2; rol writes 52 to t2.
rol t2, t0, t1