1# Copyright (C) 2010-2022 Free Software Foundation, Inc. 2 3# This file is part of GCC. 4 5# GCC is free software; you can redistribute it and/or modify it under 6# the terms of the GNU General Public License as published by the Free 7# Software Foundation; either version 3, or (at your option) any 8# later version. 9 10# GCC is distributed in the hope that it will be useful, but WITHOUT 11# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 13# License for more details. 14 15# You should have received a copy of the GNU General Public License 16# along with GCC; see the file COPYING3. If not see 17# <http://www.gnu.org/licenses/>. 18 19dnl @synopsis GCC_AC_ENABLE_DECIMAL_FLOAT([target triplet]) 20dnl 21dnl Enable C extension for decimal float if target supports it. 22dnl 23dnl @author Andreas Krebbel <Andreas.Krebbel@de.ibm.com> 24 25AC_DEFUN([GCC_AC_ENABLE_DECIMAL_FLOAT], 26[ 27AC_ARG_ENABLE(decimal-float, 28[ --enable-decimal-float={no,yes,bid,dpd} 29 enable decimal float extension to C. Selecting 'bid' 30 or 'dpd' choses which decimal floating point format 31 to use], 32[ 33 case $enable_decimal_float in 34 yes | no | bid | dpd) default_decimal_float=$enable_decimal_float ;; 35 *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float. 36Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;; 37 esac 38], 39[ 40 case $1 in 41 aarch64* | \ 42 powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux* | s390*-*-linux* | \ 43 i?86*-*-elfiamcu | i?86*-*-gnu* | x86_64*-*-gnu* | \ 44 i?86*-*-mingw* | x86_64*-*-mingw* | \ 45 i?86*-*-cygwin* | x86_64*-*-cygwin*) 46 enable_decimal_float=yes 47 ;; 48 *) 49 AC_MSG_WARN([decimal float is not supported for this target, ignored]) 50 enable_decimal_float=no 51 ;; 52 esac 53]) 54 55# x86's use BID format instead of DPD 56case x$enable_decimal_float in 57 xyes) 58 case $1 in 59 aarch64* | i?86*-*-* | x86_64*-*-*) 60 enable_decimal_float=bid 61 ;; 62 *) 63 enable_decimal_float=dpd 64 ;; 65 esac 66 default_decimal_float=$enable_decimal_float 67 ;; 68 xno) 69 # ENABLE_DECIMAL_FLOAT is set to 0. But we have to have proper 70 # dependency on libdecnumber. 71 default_decimal_float=dpd 72 ;; 73esac 74AC_SUBST(enable_decimal_float) 75 76]) 77