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| author | Szabolcs Nagy <nsz@port70.net> | 2012-11-13 00:30:06 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <nsz@port70.net> | 2012-11-13 00:30:06 +0100 |
| commit | 37aa7f7301d6526c14635375886acd881b471f6c (patch) | |
| tree | 38ce6534902db36bb952f4c0085d1b053c423ab4 /src/math | |
| parent | 04ccbdca6d88738e23e0d6a622ad33854c468646 (diff) | |
| download | musl-37aa7f7301d6526c14635375886acd881b471f6c.tar.gz | |
math: raise flags in log2l.c on <= 0 arguments, and fix volatile
Diffstat (limited to 'src/math')
| -rw-r--r-- | src/math/log2l.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/src/math/log2l.c b/src/math/log2l.c index 8ebce9c4..76a7aacd 100644 --- a/src/math/log2l.c +++ b/src/math/log2l.c @@ -50,11 +50,6 @@ * In the tests over the interval exp(+-10000), the logarithms * of the random arguments were uniformly distributed over * [-10000, +10000]. - * - * ERROR MESSAGES: - * - * log singularity: x = 0; returns -INFINITY - * log domain: x < 0; returns NAN */ #include "libm.h" @@ -113,7 +108,7 @@ static const long double S[4] = { long double log2l(long double x) { - volatile long double z; + long double z; long double y; int e; @@ -123,8 +118,8 @@ long double log2l(long double x) return x; if (x <= 0.0) { if (x == 0.0) - return -INFINITY; - return NAN; + return -1/(x+0); /* -inf with divbyzero */ + return 0/0.0f; /* nan with invalid */ } /* separate mantissa from exponent */ |