The label L_521_mont_reduce_9_nomask is therefore appearing more than once in the compiled code. Adding '%=' to the end of the label ensure it has a unique number appended to it even when inlined.
The label L_521_mont_reduce_9_nomask is therefore appearing more than once in the compiled code. Adding '%=' to the end of the label ensure it has a unique number appended to it even when inlined.