From 3ba5a16e7af92dbeef54cdeb819f8dad0582fc08 Mon Sep 17 00:00:00 2001
From: Alexandre Oliva <oliva@adacore.com>
Date: Fri, 5 May 2023 08:34:23 -0300
Subject: [PATCH] [libstdc++] [testsuite] xfail double-prec from_chars for ldbl
When long double is wider than double, but from_chars is implemented
in terms of double, tests that involve the full precision of long
double are expected to fail. Mark them as such on aarch64-*-vxworks.
for libstdc++-v3/ChangeLog
* testsuite/20_util/from_chars/4.cc: Skip long double test06
on aarch64-vxworks.
* testsuite/20_util/to_chars/long_double.cc: Xfail run on
aarch64-vxworks.
(cherry picked from commit e383fc69d2a3eab37319ea41543ee09c8cdd6e57)
---
libstdc++-v3/testsuite/20_util/from_chars/4.cc | 3 ++-
libstdc++-v3/testsuite/20_util/to_chars/long_double.cc | 4 ++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/4.cc b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
index dd55690eb651..c3594f9014bd 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/4.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/4.cc
@@ -18,6 +18,7 @@
// <charconv> is supported in C++14 as a GNU extension
// { dg-do run { target c++14 } }
// { dg-add-options ieee }
+// { dg-additional-options "-DSKIP_LONG_DOUBLE" { target aarch64-*-vxworks* } }
#include <charconv>
#include <string>
@@ -354,7 +355,7 @@ test06()
{
test_max_mantissa<float, unsigned long>();
test_max_mantissa<double, unsigned long long>();
-#ifdef __GLIBCXX_TYPE_INT_N_0
+#if defined __GLIBCXX_TYPE_INT_N_0 && !defined SKIP_LONG_DOUBLE
test_max_mantissa<long double, unsigned __GLIBCXX_TYPE_INT_N_0>();
#endif
}
diff --git a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
index 880c98021876..263144bd42cb 100644
--- a/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
+++ b/libstdc++-v3/testsuite/20_util/to_chars/long_double.cc
@@ -34,6 +34,10 @@
// more portable and robust to differences in system printf behavior.
// { dg-xfail-run-if "Non-conforming printf (see PR98384)" { *-*-solaris* *-*-darwin* } }
+// On systems that use double-precision from_chars for long double,
+// this is expected to fail.
+// { dg-xfail-run-if "from_chars limited to double-precision" { aarch64-*-vxworks* } }
+
// { dg-require-effective-target ieee_floats }
// { dg-require-effective-target size32plus }
// { dg-require-cmath "" }
--
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