third_party/ulib/musl/src/math/frexpl.c

#include "libm.h"

#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double frexpl(long double x, int* e) {
    return frexp(x, e);
}
#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
long double frexpl(long double x, int* e) {
    union ldshape u = {x};
    int ee = u.i.se & 0x7fff;

    if (!ee) {
        if (x) {
            x = frexpl(x * 0x1p120, e);
            *e -= 120;
        } else
            *e = 0;
        return x;
    } else if (ee == 0x7fff) {
        return x;
    }

    *e = ee - 0x3ffe;
    u.i.se &= 0x8000;
    u.i.se |= 0x3ffe;
    return u.f;
}
#endif