diff options
| author | Szabolcs Nagy <nsz@port70.net> | 2013-09-04 15:54:02 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <nsz@port70.net> | 2013-09-05 11:30:08 +0000 |
| commit | aa0c4a204e28cfc90a9ee955691a6cbe014c9fde (patch) | |
| tree | e75c43e934d087e203dc999ba75168ee78e6ee7b /src/math/acoshl.c | |
| parent | 2eaed464e2080d8321d3903b71086a1ecfc4ee4a (diff) | |
| download | musl-aa0c4a204e28cfc90a9ee955691a6cbe014c9fde.tar.gz musl-aa0c4a204e28cfc90a9ee955691a6cbe014c9fde.tar.bz2 musl-aa0c4a204e28cfc90a9ee955691a6cbe014c9fde.tar.xz musl-aa0c4a204e28cfc90a9ee955691a6cbe014c9fde.zip | |
math: long double fix (use ldshape union)
* use new ldshape union consistently
* add ld128 support to frexpl
* simplify sqrtl comment (ld64 is not just arm)
Diffstat (limited to 'src/math/acoshl.c')
| -rw-r--r-- | src/math/acoshl.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/src/math/acoshl.c b/src/math/acoshl.c index 472c71cb..de31fb75 100644 --- a/src/math/acoshl.c +++ b/src/math/acoshl.c @@ -9,15 +9,13 @@ long double acoshl(long double x) /* acosh(x) = log(x + sqrt(x*x-1)) */ long double acoshl(long double x) { - union { - long double f; - struct{uint64_t m; int16_t se; uint16_t pad;} i; - } u = {.f = x}; + union ldshape u = {x}; + int e = u.i.se & 0x7fff; - if (u.i.se < 0x3fff + 1) + if (e < 0x3fff + 1) /* x < 2, invalid if x < 1 or nan */ return log1pl(x-1 + sqrtl((x-1)*(x-1)+2*(x-1))); - if (u.i.se < 0x3fff + 32) + if (e < 0x3fff + 32) /* x < 0x1p32 */ return logl(2*x - 1/(x+sqrtl(x*x-1))); return logl(x) + 0.693147180559945309417232121458176568L; |