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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.
116 lines
4.8 KiB
Plaintext
116 lines
4.8 KiB
Plaintext
dnl A function to detect the binary format used by C++ doubles.
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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_CXX_DOUBLE_BINARY_FORMAT],
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[
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AC_REQUIRE([AC_C_BIGENDIAN])
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ac_save_CPPFLAGS="$CPPFLAGS"
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ac_save_LIBS="$LIBS"
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AC_LANG_PUSH(C++)
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AC_MSG_CHECKING([the binary format of C++ doubles])
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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#include <limits>
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#ifdef HAVE_STDINT_H
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#ifndef __STDC_LIMIT_MACROS
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#define __STDC_LIMIT_MACROS 1
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#endif
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#include <stdint.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#if SIZEOF_DOUBLE == 8
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double
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convert(uint32_t msp, uint32_t lsp) {
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union {
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double value;
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struct {
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#ifdef WORDS_BIGENDIAN
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uint32_t msp;
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uint32_t lsp;
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#else
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uint32_t lsp;
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uint32_t msp;
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#endif
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} parts;
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} u;
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u.parts.msp = msp;
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u.parts.lsp = lsp;
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return u.value;
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}
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int
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main() {
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if (std::numeric_limits<double>::is_iec559
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&& (convert(0xaaacccaaUL, 0xacccaaacUL)
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== -4.018242396032647085467373664662028399901175154542925376476863248797653889888945947404163925979898721593782464256360719269163883854613473748830842329884157359816532025640075051481726120707111709993717456369512975427023957197464411926714771905463723621065863511603311053477227687835693359375e-103
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&& convert(0xcccaaaccUL, 0xcaaacccaUL)
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== -85705035845709846787631445265530356117787053916987832397725696.0
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&& convert(0x00000000UL, 0x00000001UL)
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== 4.940656458412465441765687928682213723650598026143247644255856825006755072702087518652998363616359923797965646954457177309266567103559397963987747960107818781263007131903114045278458171678489821036887186360569987307230500063874091535649843873124733972731696151400317153853980741262385655911710266585566867681870395603106249319452715914924553293054565444011274801297099995419319894090804165633245247571478690147267801593552386115501348035264934720193790268107107491703332226844753335720832431936092382893458368060106011506169809753078342277318329247904982524730776375927247874656084778203734469699533647017972677717585125660551199131504891101451037862738167250955837389733598993664809941164205702637090279242767544565229087538682506419718265533447265625e-324
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&& convert(0x80000000UL, 0x00000001UL)
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== -4.940656458412465441765687928682213723650598026143247644255856825006755072702087518652998363616359923797965646954457177309266567103559397963987747960107818781263007131903114045278458171678489821036887186360569987307230500063874091535649843873124733972731696151400317153853980741262385655911710266585566867681870395603106249319452715914924553293054565444011274801297099995419319894090804165633245247571478690147267801593552386115501348035264934720193790268107107491703332226844753335720832431936092382893458368060106011506169809753078342277318329247904982524730776375927247874656084778203734469699533647017972677717585125660551199131504891101451037862738167250955837389733598993664809941164205702637090279242767544565229087538682506419718265533447265625e-324))
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return 0;
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else
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return 1;
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}
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#else // SIZEOF_DOUBLE != 8
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int
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main() {
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return 1;
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}
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#endif // SIZEOF_DOUBLE != 8
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]])],
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AC_DEFINE(PPL_CXX_DOUBLE_BINARY_FORMAT, PPL_FLOAT_IEEE754_DOUBLE,
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[The unique code of the binary format of C++ doubles, if supported; undefined otherwise.])
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ac_cxx_double_binary_format="IEEE754 Double Precision",
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ac_cxx_double_binary_format=unknown,
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ac_cxx_double_binary_format=unknown)
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AC_MSG_RESULT($ac_cxx_double_binary_format)
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AC_CXX_DOUBLE_EXACT_OUTPUT
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if test x"$ac_cxx_double_binary_format" = x"unknown" || test $ac_cxx_double_exact_output = 0 || test $ac_cv_can_control_fpu = 0
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then
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ac_supported_double=0
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else
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ac_supported_double=1
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fi
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AM_CONDITIONAL(SUPPORTED_DOUBLE, test $ac_supported_double = 1)
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AC_DEFINE_UNQUOTED(PPL_SUPPORTED_DOUBLE, $ac_supported_double,
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[Not zero if doubles are supported.])
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AC_LANG_POP(C++)
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CPPFLAGS="$ac_save_CPPFLAGS"
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LIBS="$ac_save_LIBS"
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])
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