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| author | Nicolas Brunie <nbrunie@kalray.eu> | 2020-02-14 12:12:25 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2020-02-14 12:12:25 +0300 |
| commit | bb25dd1b0f39f343b764fd0db861cb9a30441407 (patch) | |
| tree | a54b3806db7120c7ec74b4980670ca36295c88ef | |
| parent | 8cb20fa5d3d3b8ee4d61360390e5192c1eba0a1c (diff) | |
pow: fix pow(-1.0, NaN)
I think I may have encountered a bug in the implementation of pow:
pow(-1.0, NaN) returns 1.0 when it should return NaN.
Because ix is used to check input vs 1.0 rather than hx, -1.0 is
mistaken for 1.0
| -rw-r--r-- | newlib/libm/math/e_pow.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/newlib/libm/math/e_pow.c b/newlib/libm/math/e_pow.c index 6d2a501a1..5fd28e65f 100644 --- a/newlib/libm/math/e_pow.c +++ b/newlib/libm/math/e_pow.c @@ -122,7 +122,7 @@ ivln2_l = 1.92596299112661746887e-08; /* 0x3E54AE0B, 0xF85DDF44 =1/ln2 tail*/ /* x|y==NaN return NaN unless x==1 then return 1 */ if(ix > 0x7ff00000 || ((ix==0x7ff00000)&&(lx!=0)) || iy > 0x7ff00000 || ((iy==0x7ff00000)&&(ly!=0))) { - if(((ix-0x3ff00000)|lx)==0) return one; + if(((hx-0x3ff00000)|lx)==0) return one; else return nan(""); } |