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authorSzabolcs Nagy <nsz@port70.net>2013-09-04 15:54:02 +0000
committerSzabolcs Nagy <nsz@port70.net>2013-09-05 11:30:08 +0000
commitaa0c4a204e28cfc90a9ee955691a6cbe014c9fde (patch)
treee75c43e934d087e203dc999ba75168ee78e6ee7b /src/math/acoshl.c
parent2eaed464e2080d8321d3903b71086a1ecfc4ee4a (diff)
downloadmusl-aa0c4a204e28cfc90a9ee955691a6cbe014c9fde.tar.gz
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.c10
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;