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| 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/log2.c | |
| parent | acb744921b73f5a73803e533e5e4a4896d164a26 (diff) | |
| parent | 0cbb65479147ecdaa664e88cc2a5a925f3de502f (diff) | |
| download | musl-97721a5508415a2f10eb068e022093811c9ff8be.tar.gz | |
Merge remote branch 'nsz/master'
Diffstat (limited to 'src/math/log2.c')
| -rw-r--r-- | src/math/log2.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/math/log2.c b/src/math/log2.c index a5b8abdd..1974215d 100644 --- a/src/math/log2.c +++ b/src/math/log2.c @@ -27,8 +27,6 @@ two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ ivln2hi = 1.44269504072144627571e+00, /* 0x3ff71547, 0x65200000 */ ivln2lo = 1.67517131648865118353e-10; /* 0x3de705fc, 0x2eefa200 */ -static const double zero = 0.0; - double log2(double x) { double f,hfsq,hi,lo,r,val_hi,val_lo,w,y; @@ -40,9 +38,9 @@ double log2(double x) k = 0; if (hx < 0x00100000) { /* x < 2**-1022 */ if (((hx&0x7fffffff)|lx) == 0) - return -two54/zero; /* log(+-0)=-inf */ + return -two54/0.0; /* log(+-0)=-inf */ if (hx < 0) - return (x-x)/zero; /* log(-#) = NaN */ + return (x-x)/0.0; /* log(-#) = NaN */ /* subnormal number, scale up x */ k -= 54; x *= two54; @@ -51,7 +49,7 @@ double log2(double x) if (hx >= 0x7ff00000) return x+x; if (hx == 0x3ff00000 && lx == 0) - return zero; /* log(1) = +0 */ + return 0.0; /* log(1) = +0 */ k += (hx>>20) - 1023; hx &= 0x000fffff; i = (hx+0x95f64) & 0x100000; |