From aa0c4a204e28cfc90a9ee955691a6cbe014c9fde Mon Sep 17 00:00:00 2001 From: Szabolcs Nagy Date: Wed, 4 Sep 2013 15:54:02 +0000 Subject: 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) --- src/math/acoshl.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'src/math/acoshl.c') 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; -- cgit v1.2.1