From 26083e055865419be834cbbd853960a567288188 Mon Sep 17 00:00:00 2001 From: Bruno Haible Date: Sun, 13 Apr 2008 21:20:17 +0200 Subject: [PATCH] Avoid negating 0.0L - it yields a wrong result on HP-UX/hppa. --- ChangeLog | 6 ++++++ tests/test-signbit.c | 5 ++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index 58303a3c0..b9b9692fc 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,11 @@ 2008-04-13 Bruno Haible + Make test-signbit pass on HP-UX/hppa. + * tests/test-signbit.c (minus_zerol): New variable. + (test_signbitl): Use it. + +2008-04-13 Bruno Haible + Make truncl work on OSF/1 4.0. * m4/truncl.m4 (gl_FUNC_TRUNCL): Test whether truncl actually works. Set REPLACE_TRUNCL, not HAVE_DECL_TRUNCL. diff --git a/tests/test-signbit.c b/tests/test-signbit.c index 1d1a2a84a..2245e0244 100644 --- a/tests/test-signbit.c +++ b/tests/test-signbit.c @@ -39,6 +39,9 @@ float zerof = 0.0f; double zerod = 0.0; long double zerol = 0.0L; +/* We cannot use the expression '-zerol' here, because on HP-UX/hppa it + evaluates to 0.0L, not -0.0L. */ +long double minus_zerol = -0.0L; static void test_signbitf () @@ -140,7 +143,7 @@ test_signbitl () ASSERT (signbit (-2.718e-30L)); /* Zeros. */ ASSERT (!signbit (0.0L)); - if (1.0L / -zerol < 0) + if (1.0L / minus_zerol < 0) ASSERT (signbit (-0.0L)); else ASSERT (!signbit (-0.0L)); -- 2.11.0