SRAW - RISC-V instruction reference

srawShift right arithmetic word (32-bit) RV64 only
Shifts the low 32 bits of t2 right by the amount in the low 5 bits of t3, filling with the sign bit, and sign-extends into t1 (RV64 only).
RISC-V manual: sraw 
Forms  sraw , ,   
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. 
This example runs on RV64.
 .text
li t0, 13
li t1, 2
# t0=13, t1=2; sraw writes 3 to t2.
sraw t2, t0, t1