NOT: RISC-V instruction reference

notBitwise NOT (bit inversion) Pseudo-instruction
Sets the first register to the bitwise NOT of the second, flipping every bit.
RISC-V manual: xori 
Used in Arithmetic, logic and bitsRISC-V assembly
 
Forms  not ,   
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; not writes -14 (0xFFFFFFF2) to t2.
not t2, t0