Hardware Integer divide instructions do not trap. Define this to be so
for the ARM port.
Applied to trunk after a build and test across architecture ranges and a
bootstrap and regression run on a Cortex-A15 - a v7ve core that has
hardware divide instructions.
A patch for AArch64 follows.
regards
Ramana
2015-05-17 Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
* configure.host: Define cpu_defines_dir for ARM.
* config/cpu/arm/cpu_defines.h: New file.
Index: ChangeLog
===================================================================
--- ChangeLog (revision 223359)
+++ ChangeLog (working copy)
@@ -1,3 +1,8 @@
+2015-05-17 Ramana Radhakrishnan <ramana.radhakrish...@arm.com>
+
+ * configure.host: Define cpu_defines_dir for ARM.
+ * config/cpu/arm/cpu_defines.h: New file.
+
2015-05-17 François Dumont <fdum...@gcc.gnu.org>
* include/bits/unordered_map.h (unordered_map, unordered_multimap): Add
Index: config/cpu/arm/cpu_defines.h
===================================================================
--- config/cpu/arm/cpu_defines.h (revision 0)
+++ config/cpu/arm/cpu_defines.h (working copy)
@@ -0,0 +1,40 @@
+// Specific definitions for generic platforms -*- C++ -*-
+
+// Copyright (C) 2015 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/cpu_defines.h
+ * This is an internal header file, included by other library headers.
+ * Do not attempt to use it directly. @headername{iosfwd}
+ */
+
+#ifndef _GLIBCXX_CPU_DEFINES
+#define _GLIBCXX_CPU_DEFINES 1
+
+// Integer divide instructions don't trap on ARM.
+#ifdef __ARM_ARCH_EXT_IDIV__
+#define __glibcxx_integral_traps false
+#else
+#define __glibcxx_integral_traps true
+#endif
+
+#endif
Index: configure.host
===================================================================
--- configure.host (revision 223359)
+++ configure.host (working copy)
@@ -143,6 +143,9 @@
# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
# THIS TABLE IS SORTED. KEEP IT THAT WAY.
case "${host_cpu}" in
+ arm*)
+ cpu_defines_dir=cpu/arm
+ ;;
powerpc* | rs6000)
cpu_defines_dir=cpu/powerpc
;;
