source: asp3_tinet_ecnl_rx/trunk/musl-1.1.18/src/math/sinhl.c@ 337

#include "libm.h"

#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
long double sinhl(long double x)
{
        return sinh(x);
}
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384
long double sinhl(long double x)
{
        union ldshape u = {x};
        unsigned ex = u.i.se & 0x7fff;
        long double h, t, absx;

        h = 0.5;
        if (u.i.se & 0x8000)
                h = -h;
        /* |x| */
        u.i.se = ex;
        absx = u.f;

        /* |x| < log(LDBL_MAX) */
        if (ex < 0x3fff+13 || (ex == 0x3fff+13 && u.i.m>>32 < 0xb17217f7)) {
                t = expm1l(absx);
                if (ex < 0x3fff) {
                        if (ex < 0x3fff-32)
                                return x;
                        return h*(2*t - t*t/(1+t));
                }
                return h*(t + t/(t+1));
        }

        /* |x| > log(LDBL_MAX) or nan */
        t = expl(0.5*absx);
        return h*t*t;
}
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
// TODO: broken implementation to make things compile
long double sinhl(long double x)
{
        return sinh(x);
}
#endif