__complex128
catanhq (__complex128 x)
{
__complex128 res;
int rcls = fpclassifyq (__real__ x);
int icls = fpclassifyq (__imag__ x);
if (rcls <= QUADFP_INFINITE || icls <= QUADFP_INFINITE)
{
if (icls == QUADFP_INFINITE)
{
__real__ res = copysignq (0.0, __real__ x);
__imag__ res = copysignq (M_PI_2q, __imag__ x);
}
else if (rcls == QUADFP_INFINITE || rcls == QUADFP_ZERO)
{
__real__ res = copysignq (0.0, __real__ x);
if (icls >= QUADFP_ZERO)
__imag__ res = copysignq (M_PI_2q, __imag__ x);
else
__imag__ res = nanq ("");
}
else
{
__real__ res = nanq ("");
__imag__ res = nanq ("");
}
}
else if (rcls == QUADFP_ZERO && icls == QUADFP_ZERO)
{
res = x;
}
else
{
__float128 i2, num, den;
i2 = __imag__ x * __imag__ x;
num = 1.0 + __real__ x;
num = i2 + num * num;
den = 1.0 - __real__ x;
den = i2 + den * den;
__real__ res = 0.25 * (logq (num) - logq (den));
den = 1 - __real__ x * __real__ x - i2;
__imag__ res = 0.5 * atan2q (2.0 * __imag__ x, den);
}
return res;
}
__complex128
clogq (__complex128 z)
{
__complex128 v;
COMPLEX_ASSIGN (v, logq (cabsq (z)), cargq (z));
return v;
}
__float128
logxq (__float128 num, __float128 base)
{
return logq (num) / logq (base);
}
inline void eval_log(float128_backend& result, const float128_backend& arg)
{
result.value() = logq(arg.value());
}
inline Quad Log( const Quad& alpha ) { return logq(alpha); }
tFloat p_u(tFloat s1, tFloat s2, tFloat s3, tFloat h1, tFloat h2, tFloat h3)
{
return logq((s2-s3)/(s1-s2))/logq(h3/h2);
}
