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Diffstat (limited to 'winsup/cygwin/math/atanhl.c')
| -rw-r--r-- | winsup/cygwin/math/atanhl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/winsup/cygwin/math/atanhl.c b/winsup/cygwin/math/atanhl.c index 59eb1bd91..a9b8e24b9 100644 --- a/winsup/cygwin/math/atanhl.c +++ b/winsup/cygwin/math/atanhl.c @@ -26,7 +26,7 @@ long double atanhl (long double x) } /* Rearrange formula to avoid precision loss for small x. atanh(x) = 0.5 * log ((1.0 + x)/(1.0 - x)) - = 0.5 * log1p ((1.0 + x)/(1.0 - x) - 1.0) + = 0.5 * log1p ((1.0 + x)/(1.0 - x) - 1.0) = 0.5 * log1p ((1.0 + x - 1.0 + x) /(1.0 - x)) = 0.5 * log1p ((2.0 * x ) / (1.0 - x)) */ z = 0.5L * __fast_log1pl ((z + z) / (1.0L - z)); |