XNOR - RISC-V instruction reference

xnorExclusive NOR 
Sets t1 to the bitwise NOT of the XOR of t2 and t3, so each bit is 1 where t2 and t3 agree.
RISC-V manual: xnor 
Forms  xnor , ,   
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, 5
# t0=13, t1=5; xnor writes -9 (0xFFFFFFF7) to t2.
xnor t2, t0, t1