20 scalbf(float x, float fn)  in scalbf()  argument
22     if (isnan(fn) || isnan(x))  in scalbf()
23         return x + fn;  in scalbf()
25     if (isinf(fn)) {  in scalbf()
26         if ((x == 0.0f && fn > 0.0f) || (isinf(x) && fn < 0.0f))  in scalbf()
27             return __math_invalidf(fn);  in scalbf()
28         if (fn > 0.0f)  in scalbf()
29             return fn*x;  in scalbf()
31             return x/(-fn);  in scalbf()
34     if (rintf(fn) != fn)  in scalbf()
35         return __math_invalidf(fn);  in scalbf()
37     if (fn > 4 * __FLT_MAX_EXP__)  in scalbf()
38         fn = 4 * __FLT_MAX_EXP__;  in scalbf()
40     if (fn < -4 * __FLT_MAX_EXP__)  in scalbf()
41         fn = -4 * __FLT_MAX_EXP__;  in scalbf()
43     return scalbnf(x, (int)fn);  in scalbf()