This is faster
IF A+B+C=0
The generated ASM
Code:
ADD?BBW	_A, _B, T1
ADD?WBW	T1, _C, T1
CMPNE?WCL	T1, 000h, L00001
This
IF A=0 AND B=0 AND C=0 THEN
Generates
Code:
CMPEQ?BCB	_A, 000h, T1
CMPEQ?BCB	_B, 000h, T2
LAND?BBW	T1, T2, T2
CMPEQ?BCB	_C, 000h, T3
LAND?WBW	T2, T3, T3
CMPF?WL	T3, L00003