float MAXLOGF = 88.02969187150841;
float MINLOGF = -103.278929903431851103; /* log(2^-149) */
float MAXNUMF = 1.7014117331926442990585209174225846272e38;
float LOG2EF = 1.44269504088896341;
float LOGE2F = 0.693147180559945309;
float SQRTHF = 0.707106781186547524;
float PIF = 3.141592653589793238;
float PIO2F = 1.5707963267948966192;
float PIO4F = 0.7853981633974483096;
float MACHEPF = 5.9604644775390625E-8;