diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_cexp.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_cexp.c | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/sysdeps/libm-ieee754/s_cexp.c b/sysdeps/libm-ieee754/s_cexp.c index 233a40014f..f6b443ddba 100644 --- a/sysdeps/libm-ieee754/s_cexp.c +++ b/sysdeps/libm-ieee754/s_cexp.c @@ -33,8 +33,16 @@ __cexp (__complex__ double x) { double exp_val = __exp (__real__ x); - __real__ retval = exp_val * __cos (__imag__ x); - __imag__ retval = exp_val * __sin (__imag__ x); + if (isfinite (exp_val)) + { + __real__ retval = exp_val * __cos (__imag__ x); + __imag__ retval = exp_val * __sin (__imag__ x); + } + else + { + __real__ retval = __copysign (exp_val, __cos (__imag__ x)); + __imag__ retval = __copysign (exp_val, __sin (__imag__ x)); + } } else { @@ -48,14 +56,17 @@ __cexp (__complex__ double x) { if (isfinite (__imag__ x)) { - if (signbit (__real__ x) == 0 && __imag__ x == 0.0) - retval = HUGE_VAL; + double value = signbit (__real__ x) ? 0.0 : HUGE_VAL; + + if (__imag__ x == 0.0) + { + __real__ retval = value; + __imag__ retval = __imag__ x; + } else { - double value = signbit (__real__ x) ? 0.0 : HUGE_VAL; - - __real__ retval = value * __cos (__imag__ x); - __imag__ retval = value * __sin (__imag__ x); + __real__ retval = __copysign (value, __cos (__imag__ x)); + __imag__ retval = __copysign (value, __sin (__imag__ x)); } } else if (signbit (__real__ x) == 0) @@ -64,7 +75,10 @@ __cexp (__complex__ double x) __imag__ retval = __nan (""); } else - retval = 0.0; + { + __real__ retval = 0.0; + __imag__ retval = __copysign (0.0, __imag__ x); + } } else { |