diff options
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; |