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Improve clog, clog10 handling of values with real or imaginary part slightly above 1 (bug 13629).

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This commit is contained in:
Joseph Myers
2012-07-31 14:21:19 +00:00
parent 2bc1387273
commit d0419dbfbd
10 changed files with 258 additions and 2 deletions
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7
math/s_clog10.c
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@ -81,6 +81,13 @@ __clog10 (__complex__ double x)
else
__real__ result = __log1p (absy2) * (M_LOG10E / 2.0);
}
else if (absx > 1.0 && absx < 2.0 && absy < 1.0 && scale == 0)
{
double d2m1 = (absx - 1.0) * (absx + 1.0);
if (absy >= DBL_EPSILON)
d2m1 += absy * absy;
__real__ result = __log1p (d2m1) * (M_LOG10E / 2.0);
}
else
{
double d = __ieee754_hypot (absx, absy);