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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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43
libc/math/sinhl.c Normal file
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#include "libc/math/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