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/logb.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/math/logb.c') diff --git a/src/math/logb.c b/src/math/logb.c index d0bbfaca..8dd29371 100644 --- a/src/math/logb.c +++ b/src/math/logb.c @@ -1,9 +1,16 @@ # define TGSOURCE "logb.c" #include "_tgmath.h" #include +#include "fenv.h" TYPE TGFN(logb)(TYPE x) { + switch (fpclassify(x)) { + case FP_ZERO: feraiseexcept(FE_DIVBYZERO); return - INFINITY; + case FP_INFINITE: return x; + default: break; + } + return x; } -- cgit v1.2.1