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* these are dependencies for gcc 4 Graphite engine build. * CLooG 0.18.0 includes ISL 0.11.1 which is the backend that the build script enables. * PPL is needed by GCC build even if it isn't the chosen backend.
149 lines
3.3 KiB
Plaintext
149 lines
3.3 KiB
Plaintext
dnl A function to check for the possibility to control the FPU.
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dnl Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
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dnl Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
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dnl
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dnl This file is part of the Parma Polyhedra Library (PPL).
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dnl
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dnl The PPL is free software; you can redistribute it and/or modify it
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dnl under the terms of the GNU General Public License as published by the
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dnl Free Software Foundation; either version 3 of the License, or (at your
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dnl option) any later version.
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dnl
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dnl The PPL is distributed in the hope that it will be useful, but WITHOUT
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dnl ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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dnl FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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dnl for more details.
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dnl
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dnl You should have received a copy of the GNU General Public License
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dnl along with this program; if not, write to the Free Software Foundation,
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dnl Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
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dnl
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dnl For the most up-to-date information see the Parma Polyhedra Library
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dnl site: http://www.cs.unipr.it/ppl/ .
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AC_DEFUN([AC_CHECK_FPU_CONTROL],
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[
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AC_LANG_PUSH(C++)
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AC_CHECK_HEADERS([fenv.h ieeefp.h])
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AC_MSG_CHECKING([if it is possible to control the FPU])
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#if i386
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int
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main() {
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return 0;
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}
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#elif defined(HAVE_FENV_H)
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# include <fenv.h>
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# if !defined(FE_UPWARD) || !defined(FE_DOWNWARD)
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choke me
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# elif defined(__arm__) \
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&& (!defined(PPL_ARM_CAN_CONTROL_FPU) || !PPL_ARM_CAN_CONTROL_FPU)
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choke me
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#else
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float nf1 = -3, pf1 = 3, f2 = 5;
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double nd1 = -7, pd1 = 7, d2 = 11;
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long double nl1 = -13, pl1 = 13, l2 = 17;
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float nf[2], pf[2];
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double nd[2], pd[2];
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long double nl[2], pl[2];
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int
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ppl_check_function() {
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int r = 0;
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if (nf[0] == nf[1] || pf[0] == pf[1] || -nf[0] != pf[1] || -nf[1] != pf[0])
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r |= 1;
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if (nd[0] == nd[1] || pd[0] == pd[1] || -nd[0] != pd[1] || -nd[1] != pd[0])
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r |= 2;
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if (nl[0] == nl[1] || pl[0] == pl[1] || -nl[0] != pl[1] || -nl[1] != pl[0])
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r |= 4;
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return r;
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}
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int
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ppl_setround_function(int rounding_mode) {
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return fesetround(rounding_mode);
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}
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int (* volatile ppl_check_function_p)() = ppl_check_function;
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int (* volatile ppl_setround_function_p)(int) = ppl_setround_function;
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int
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main() {
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if ((*ppl_setround_function_p)(FE_DOWNWARD) != 0)
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return 255;
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nf[0] = nf1 / f2;
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nd[0] = nd1 / d2;
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nl[0] = nl1 / l2;
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pf[0] = pf1 / f2;
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pd[0] = pd1 / d2;
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pl[0] = pl1 / l2;
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if ((*ppl_setround_function_p)(FE_UPWARD) != 0)
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return 255;
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nf[1] = nf1 / f2;
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nd[1] = nd1 / d2;
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nl[1] = nl1 / l2;
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pf[1] = pf1 / f2;
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pd[1] = pd1 / d2;
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pl[1] = pl1 / l2;
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return (*ppl_check_function_p)();
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}
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# endif
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#elif sparc && defined(HAVE_IEEEFP_H)
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int
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main() {
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return 0;
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}
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#else
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choke me
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#endif
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]])],
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AC_MSG_RESULT(yes)
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ac_cv_can_control_fpu=1,
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AC_MSG_RESULT(no)
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ac_cv_can_control_fpu=0,
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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#if i386 || (sparc && defined(HAVE_IEEEFP_H))
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int
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main() {
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return 0;
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}
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#else
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choke me
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#endif
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]])],
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AC_MSG_RESULT(yes)
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ac_cv_can_control_fpu=1,
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AC_MSG_RESULT(no)
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ac_cv_can_control_fpu=0
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)
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)
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AM_CONDITIONAL(CAN_CONTROL_FPU, test $ac_cv_can_control_fpu = 1)
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AC_DEFINE_UNQUOTED(PPL_CAN_CONTROL_FPU, $ac_cv_can_control_fpu,
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[Not zero if the FPU can be controlled.])
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AC_LANG_POP(C++)
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])
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