From 06696f40afe58a231e2531c8bf6d9f0dadb92e51 Mon Sep 17 00:00:00 2001 From: Jakob Kaivo Date: Sun, 3 Mar 2019 21:25:50 -0500 Subject: outline details from C18 annex F --- src/math/atanh.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'src/math/atanh.c') diff --git a/src/math/atanh.c b/src/math/atanh.c index eef1cfc6..bfd4e57b 100644 --- a/src/math/atanh.c +++ b/src/math/atanh.c @@ -1,9 +1,24 @@ # define TGSOURCE "atanh.c" #include "_tgmath.h" #include +#include "fenv.h" TYPE TGFN(atanh)(TYPE x) { + if (fpclassify(x) == FP_ZERO) { + return x; + } + + if (TGFN(fabs)(x) == 1.0) { + feraiseexcept(FE_DIVBYZERO); + return copysign(INFINITY, x); + } + + if (TGFN(fabs)(x) > 1.0) { + feraiseexcept(FE_INVALID); + return NAN; + } + return x; } -- cgit v1.2.1