using gprof to compare operation time

fx_s4716_longlong.h

 typedef long long fx_s4716;
 
-#define F_POWER_2_16 65536.0
-
 #define FX_S4716_LONGLONG_MUL1(a, b) (((a) * (b)) >> 16)
 #define FX_S4716_LONGLONG_MUL2(a, b) ((a >> 8) * (b >> 8))
 #define FX_S4716_LONGLONG_MUL3(a, b) (((a >> 4) * (b >> 4)) >> 8)
 
 #define FX_S4716_LONGLONG_DIV1(a, b) ((a << 16) / (b))
 #define FX_S4716_LONGLONG_DIV2(a, b) (((a << 8) / (b)) << 8)
-#define FX_S4716_LONGLONG_DIV3(a, b) (((a << 4) / (b << 4)) << 8)
+#define FX_S4716_LONGLONG_DIV3(a, b) (((a << 12) / (b)) << 4)
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