diff options
| author | Rich Felker <dalias@aerifal.cx> | 2012-03-19 22:07:43 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-03-19 22:07:43 -0400 |
| commit | 97721a5508415a2f10eb068e022093811c9ff8be (patch) | |
| tree | 88e9ce153895ad949576fa7ce1eeee4b02286479 /src/math/atanh.c | |
| parent | acb744921b73f5a73803e533e5e4a4896d164a26 (diff) | |
| parent | 0cbb65479147ecdaa664e88cc2a5a925f3de502f (diff) | |
| download | musl-97721a5508415a2f10eb068e022093811c9ff8be.tar.gz | |
Merge remote branch 'nsz/master'
Diffstat (limited to 'src/math/atanh.c')
| -rw-r--r-- | src/math/atanh.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/math/atanh.c b/src/math/atanh.c index 29290463..dbe241d1 100644 --- a/src/math/atanh.c +++ b/src/math/atanh.c @@ -30,8 +30,7 @@ #include "libm.h" -static const double one = 1.0, huge = 1e300; -static const double zero = 0.0; +static const double huge = 1e300; double atanh(double x) { @@ -44,15 +43,15 @@ double atanh(double x) if ((ix | ((lx|-lx)>>31)) > 0x3ff00000) /* |x| > 1 */ return (x-x)/(x-x); if (ix == 0x3ff00000) - return x/zero; - if (ix < 0x3e300000 && (huge+x) > zero) /* x < 2**-28 */ + return x/0.0; + if (ix < 0x3e300000 && (huge+x) > 0.0) /* x < 2**-28 */ return x; SET_HIGH_WORD(x, ix); if (ix < 0x3fe00000) { /* x < 0.5 */ t = x+x; - t = 0.5*log1p(t + t*x/(one-x)); + t = 0.5*log1p(t + t*x/(1.0-x)); } else - t = 0.5*log1p((x+x)/(one-x)); + t = 0.5*log1p((x+x)/(1.0-x)); if (hx >= 0) return t; return -t; |