MULHSU: RISC-V instruction reference

mulhsuMultiply high (signed × unsigned) 
Multiplies the second register, as signed, by the third, as unsigned, and stores the high register-width bits of the product in the first.
RISC-V manual: mulhsu 
Forms  mulhsu , ,   
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, -2147483648
li t1, 2
# t0=-2147483648 and t1=2; the high product is -1; mulhsu writes -1 (0xFFFFFFFF) to t2.
mulhsu t2, t0, t1