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| author | Joseph Myers <joseph@codesourcery.com> | 2013-01-31 22:55:29 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-01-31 22:55:29 +0000 |
| commit | 8cf28c5ebe7b02e769a3f3082fd390e6d8c11542 (patch) | |
| tree | be283a6db0d8e4fb2674efab398cbd0a9199f819 /math/k_casinhl.c | |
| parent | c4e33b8d8ba03ecb094904fb8c07c0858496b586 (diff) | |
| download | glibc-8cf28c5ebe7b02e769a3f3082fd390e6d8c11542.zip glibc-8cf28c5ebe7b02e769a3f3082fd390e6d8c11542.tar.gz glibc-8cf28c5ebe7b02e769a3f3082fd390e6d8c11542.tar.bz2 | |
Fix casinh spurious underflows away from [-i,i] (bug 15062).
Diffstat (limited to 'math/k_casinhl.c')
| -rw-r--r-- | math/k_casinhl.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/math/k_casinhl.c b/math/k_casinhl.c index 6412979..110ae33 100644 --- a/math/k_casinhl.c +++ b/math/k_casinhl.c @@ -64,6 +64,26 @@ __kernel_casinhl (__complex__ long double x, int adj) res = __clogl (y); __real__ res += M_LN2l; } + else if (rx >= 0.5L && ix < LDBL_EPSILON / 8.0L) + { + long double s = __ieee754_hypotl (1.0L, rx); + + __real__ res = __ieee754_logl (rx + s); + if (adj) + __imag__ res = __ieee754_atan2l (s, __imag__ x); + else + __imag__ res = __ieee754_atan2l (ix, s); + } + else if (rx < LDBL_EPSILON / 8.0L && ix >= 1.5L) + { + long double s = __ieee754_sqrtl ((ix + 1.0L) * (ix - 1.0L)); + + __real__ res = __ieee754_logl (ix + s); + if (adj) + __imag__ res = __ieee754_atan2l (rx, __copysignl (s, __imag__ x)); + else + __imag__ res = __ieee754_atan2l (s, rx); + } else { __real__ y = (rx - ix) * (rx + ix) + 1.0; |