diff options
Diffstat (limited to 'math/s_ctan.c')
| -rw-r--r-- | math/s_ctan.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/math/s_ctan.c b/math/s_ctan.c index 78117b3..89c0fef 100644 --- a/math/s_ctan.c +++ b/math/s_ctan.c @@ -83,10 +83,22 @@ __ctan (__complex__ double x) } else { - double sinhix = __ieee754_sinh (__imag__ x); - double coshix = __ieee754_cosh (__imag__ x); + double sinhix, coshix; + if (fabs (__imag__ x) > DBL_MIN) + { + sinhix = __ieee754_sinh (__imag__ x); + coshix = __ieee754_cosh (__imag__ x); + } + else + { + sinhix = __imag__ x; + coshix = 1.0; + } - den = cosrx * cosrx + sinhix * sinhix; + if (fabs (sinhix) > fabs (cosrx) * DBL_EPSILON) + den = cosrx * cosrx + sinhix * sinhix; + else + den = cosrx * cosrx; __real__ res = sinrx * cosrx / den; __imag__ res = sinhix * coshix / den; } |