Changes

.set GPR0,0

.set GPR0,0

This will define the constant "GPR0" having the value zero. This will replace all occurences of GPR0 in the code by the number zero. This can enhance the readability of the code, since the registers are specified as numbers just like immediate values in the instructions. So using constants e.g. the instruction addi 0,0,0 can be written as addi GPR0,GPR0,0 in the code.

This will define the constant "GPR0" having the value zero. This will replace all occurences of GPR0 in the code by the number zero. This can enhance the readability of the code, since the registers are specified as numbers just like immediate values in the instructions. So using constants e.g. the instruction addi 0,0,0 can be written as addi GPR0,GPR0,0 in the code. Without defining constants the assembler will also accept addi %r0,%r0,0.