source: asp3_tinet_ecnl_arm/trunk/musl-1.1.18/src/math/scalbnl.c@ 352

#include "libm.h"

#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double scalbnl(long double x, int n)
{
        return scalbn(x, n);
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
long double scalbnl(long double x, int n)
{
        union ldshape u;

        if (n > 16383) {
                x *= 0x1p16383L;
                n -= 16383;
                if (n > 16383) {
                        x *= 0x1p16383L;
                        n -= 16383;
                        if (n > 16383)
                                n = 16383;
                }
        } else if (n < -16382) {
                x *= 0x1p-16382L * 0x1p113L;
                n += 16382 - 113;
                if (n < -16382) {
                        x *= 0x1p-16382L * 0x1p113L;
                        n += 16382 - 113;
                        if (n < -16382)
                                n = -16382;
                }
        }
        u.f = 1.0;
        u.i.se = 0x3fff + n;
        return x * u.f;
}
#endif