diff options
Diffstat (limited to 'lib/msun/src/e_powf.c')
| -rw-r--r-- | lib/msun/src/e_powf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/msun/src/e_powf.c b/lib/msun/src/e_powf.c index 466ed72..5c46478 100644 --- a/lib/msun/src/e_powf.c +++ b/lib/msun/src/e_powf.c @@ -67,6 +67,9 @@ __ieee754_powf(float x, float y) /* y==zero: x**0 = 1 */ if(iy==0) return one; + /* x==1: 1**y = 1, even if y is NaN */ + if (hx==0x3f800000) return one; + /* y!=zero: result is NaN if either arg is NaN */ if(ix > 0x7f800000 || iy > 0x7f800000) @@ -90,7 +93,7 @@ __ieee754_powf(float x, float y) /* special value of y */ if (iy==0x7f800000) { /* y is +-inf */ if (ix==0x3f800000) - return y - y; /* inf**+-1 is NaN */ + return one; /* (-1)**+-inf is NaN */ else if (ix > 0x3f800000)/* (|x|>1)**+-inf = inf,0 */ return (hy>=0)? y: zero; else /* (|x|<1)**-,+inf = inf,0 */ |
