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| author | Joseph Myers <joseph@codesourcery.com> | 2013-08-23 19:45:38 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-08-23 19:45:38 +0000 |
| commit | 8fe89494e6516048759425ec30d8878a6233e00f (patch) | |
| tree | b3f65b97d02bac4f183da5fe51e01cad8b8a3780 /math/s_cexp.c | |
| parent | 936241e4b2ec90bbb97d1b37bc78726372ec966f (diff) | |
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Fix cexp (NaN + i0) (bug 15532).
Diffstat (limited to 'math/s_cexp.c')
| -rw-r--r-- | math/s_cexp.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/math/s_cexp.c b/math/s_cexp.c index 655e4e8dee..40e0e518d2 100644 --- a/math/s_cexp.c +++ b/math/s_cexp.c @@ -145,12 +145,18 @@ __cexp (__complex__ double x) } else { - /* If the real part is NaN the result is NaN + iNaN. */ + /* If the real part is NaN the result is NaN + iNaN unless the + imaginary part is zero. */ __real__ retval = __nan (""); - __imag__ retval = __nan (""); + if (icls == FP_ZERO) + __imag__ retval = __imag__ x; + else + { + __imag__ retval = __nan (""); - if (rcls != FP_NAN || icls != FP_NAN) - feraiseexcept (FE_INVALID); + if (rcls != FP_NAN || icls != FP_NAN) + feraiseexcept (FE_INVALID); + } } return retval; |