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authorjoerg <joerg@NetBSD.org>2013-11-11 11:10:45 +0000
committerjoerg <joerg@NetBSD.org>2013-11-11 11:10:45 +0000
commitcee4103eb6f1b5d5c7eae7aca0ae9f90f62f0b7a (patch)
tree4394fe0ece783d7b08b7a527b522965c4f1ce10a /tests
parentae96738cc0c5db13b67ba3a893c6f081cfb10f7c (diff)
NetBSD 6.99.26: Switch i386 and amd64 to the x87 default control word
as initial value for new processes. This means that long double computations get the expected 63bit mantissa. Binaries tagged as compiled for 6.99.25 and older get the old value. Add a simple test case to ensure that double and long double computation are working correctly.
Diffstat (limited to 'tests')
-rw-r--r--tests/lib/libm/Makefile3
-rw-r--r--tests/lib/libm/t_precision.c76
2 files changed, 78 insertions, 1 deletions
diff --git a/tests/lib/libm/Makefile b/tests/lib/libm/Makefile
index c2cd7827c3a..754a7d2e16f 100644
--- a/tests/lib/libm/Makefile
+++ b/tests/lib/libm/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.18 2012/04/13 12:31:19 njoly Exp $
+# $NetBSD: Makefile,v 1.19 2013/11/11 11:10:45 joerg Exp $
.include <bsd.own.mk>
@@ -17,6 +17,7 @@ TESTS_C+= t_infinity
TESTS_C+= t_ldexp
TESTS_C+= t_log
TESTS_C+= t_pow
+TESTS_C+= t_precision
TESTS_C+= t_round
TESTS_C+= t_scalbn
TESTS_C+= t_sin
diff --git a/tests/lib/libm/t_precision.c b/tests/lib/libm/t_precision.c
new file mode 100644
index 00000000000..390be9dd18a
--- /dev/null
+++ b/tests/lib/libm/t_precision.c
@@ -0,0 +1,76 @@
+/* $NetBSD: t_precision.c,v 1.1 2013/11/11 11:10:45 joerg Exp $ */
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Joerg Sonnenberger.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_precision.c,v 1.1 2013/11/11 11:10:45 joerg Exp $");
+
+#include <atf-c.h>
+#include <atf-c/config.h>
+
+#include <float.h>
+#include <stdlib.h>
+
+ATF_TC(t_precision);
+
+ATF_TC_HEAD(t_precision, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Basic precision test for double and long double");
+}
+
+volatile double x = 1;
+volatile long double y = 1;
+
+ATF_TC_BODY(t_precision, tc)
+{
+ x += DBL_EPSILON;
+ ATF_CHECK(x != 1.0);
+ x -= 1;
+ ATF_CHECK(x == DBL_EPSILON);
+
+ x = 2;
+ x += DBL_EPSILON;
+ ATF_CHECK(x == 2.0);
+
+ y += LDBL_EPSILON;
+ ATF_CHECK(y != 1.0L);
+ y -= 1;
+ ATF_CHECK(y == LDBL_EPSILON);
+ y = 2;
+ y += LDBL_EPSILON;
+ ATF_CHECK(y == 2.0L);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+ ATF_TP_ADD_TC(tp, t_precision);
+
+ return atf_no_error();
+}