SGTU: RISC-V instruction reference

sgtuSet greater than unsigned Pseudo-instruction
Sets the first register to 1 if the second is greater than the third as unsigned integers, otherwise to 0.
RISC-V manual: sltu 
Forms  sgtu , ,   
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, 18
li t1, 5
# t0=18, t1=5; sgtu writes 1 to t2.
sgtu t2, t0, t1