REM: RISC-V instruction reference

remRemainder 
Sets the first register to the remainder of the second divided by the third, as signed integers.
RISC-V manual: rem 
Used in Arithmetic, logic and bitsRISC-V assembly
Multiply and divide, with the remainderRISC-V assembly
A subroutine with its arguments in registersRISC-V assembly
A jump tableRISC-V assembly
Print a nonnegative number in bases 2–36RISC-V assembly
A bouncing ballRISC-V assembly
Arithmetic, logic and bitsAssembly basics
 
Forms  rem , ,   
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; rem writes 3 to t2.
rem t2, t0, t1