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re PR target/54686 (std::abs (long long) resorts to std::abs (double) if llabs is absent) 

2012-10-05  Marc Glisse  <marc.glisse@inria.fr>

	PR libstdc++/54686
	* include/c_std/cstdlib (abs(long long)): Define with
	__builtin_llabs when we have long long.
	(abs(long)): Use __builtin_labs.
	(abs(__int128)): Define when we have __int128.
	* testsuite/26_numerics/headers/cstdlib/54686.c: New file.

From-SVN: r192132
This commit is contained in:
Marc Glisse 2012-10-05 18:20:44 +02:00 committed by Marc Glisse
parent 92e2cbfa6a
commit 8f2b580aeb
3 changed files with 52 additions and 5 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2012-10-05 Marc Glisse <marc.glisse@inria.fr>
PR libstdc++/54686
* include/c_std/cstdlib (abs(long long)): Define with
__builtin_llabs when we have long long.
(abs(long)): Use __builtin_labs.
(abs(__int128)): Define when we have __int128.
* testsuite/26_numerics/headers/cstdlib/54686.c: New file.
2012-10-03 Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/53248

16
libstdc++-v3/include/c_std/cstdlib
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@ -135,7 +135,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif // _GLIBCXX_USE_WCHAR_T
inline long
abs(long __i) { return labs(__i); }
abs(long __i) { return __builtin_labs(__i); }
#ifdef _GLIBCXX_USE_LONG_LONG
inline long long
abs(long long __x) { return __builtin_llabs (__x); }
#endif
#if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_INT128)
inline __int128
abs(__int128 __x) { return __x >= 0 ? __x : -__x; }
#endif
inline ldiv_t
div(long __i, long __j) { return ldiv(__i, __j); }
@ -168,9 +178,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
using ::_Exit;
#endif
inline long long
abs(long long __x) { return __x >= 0 ? __x : -__x; }
#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
using ::llabs;
@ -205,7 +212,6 @@ namespace std
using ::__gnu_cxx::lldiv_t;
#endif
using ::__gnu_cxx::_Exit;
using ::__gnu_cxx::abs;
#if !_GLIBCXX_USE_C99_LONG_LONG_DYNAMIC
using ::__gnu_cxx::llabs;
using ::__gnu_cxx::div;

32
libstdc++-v3/testsuite/26_numerics/headers/cstdlib/54686.c Normal file
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@ -0,0 +1,32 @@
// { dg-do compile }
// { dg-options "-std=c++11" }
// Copyright (C) 2012 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <cmath>
#include <cstdlib>
#include <type_traits>
#include <utility>
#ifdef _GLIBCXX_USE_LONG_LONG
void test01()
{
static_assert (std::is_same<decltype (std::abs (std::declval<long long> ())),
long long>::value, "Missing abs(long long)");
}
#endif