NEG: RISC-V instruction reference

negNegate Pseudo-instruction
Sets the first register to the arithmetic negation of the second.
RISC-V manual: sub 
Used in The RISC-V instruction setRISC-V assembly
A bouncing ballRISC-V assembly
 
Forms  neg ,   
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. 
 .text
li t0, 13
# t0=13; neg writes -13 (0xFFFFFFF3) to t2.
neg t2, t0