1 2 #include <math.h> 3 4 _Check_return_ 5 double 6 __cdecl 7 exp2( 8 _In_ double x) 9 { 10 /* This below avoids clang to optimize our pow call to exp2 */ 11 static const double TWO = 2.0; 12 return pow(TWO, x); 13 } 14