sim/m4/sim_ac_option_float.m4

   1 dnl Copyright (C) 1997-2023 Free Software Foundation, Inc.
   2 dnl
   3 dnl This program is free software; you can redistribute it and/or modify
   4 dnl it under the terms of the GNU General Public License as published by
   5 dnl the Free Software Foundation; either version 3 of the License, or
   6 dnl (at your option) any later version.
   7 dnl
   8 dnl This program is distributed in the hope that it will be useful,
   9 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 dnl GNU General Public License for more details.
  12 dnl
  13 dnl You should have received a copy of the GNU General Public License
  14 dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 dnl
  16 dnl --enable-sim-float is for developers of the simulator
  17 dnl It specifies the presence of hardware floating point
  18 dnl And optionally the bitsize of the floating point register.
  19 dnl arg[1] specifies the presence (or absence) of floating point hardware
  20 dnl arg[2] specifies the number of bits in a floating point register
  21 AC_DEFUN([SIM_AC_OPTION_FLOAT],
  22 [
  23 default_sim_float="[$1]"
  24 default_sim_float_bitsize="[$2]"
  25 AC_ARG_ENABLE(sim-float,
  26 [AS_HELP_STRING([--enable-sim-float],
  27                 [Specify that the target processor has floating point hardware])],
  28 [case "${enableval}" in
  29   yes | hard)   sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT";;
  30   no | soft)    sim_float="-DWITH_FLOATING_POINT=SOFT_FLOATING_POINT";;
  31   32)           sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT -DWITH_TARGET_FLOATING_POINT_BITSIZE=32";;
  32   64)           sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT -DWITH_TARGET_FLOATING_POINT_BITSIZE=64";;
  33   *)            AC_MSG_ERROR("Unknown value $enableval passed to --enable-sim-float"); sim_float="";;
  34 esac
  35 if test x"$silent" != x"yes" && test x"$sim_float" != x""; then
  36   echo "Setting float flags = $sim_float" 6>&1
  37 fi],[
  38 sim_float=
  39 if test x"${default_sim_float}" != x""; then
  40   sim_float="-DWITH_FLOATING_POINT=${default_sim_float}"
  41 fi
  42 if test x"${default_sim_float_bitsize}" != x""; then
  43   sim_float="$sim_float -DWITH_TARGET_FLOATING_POINT_BITSIZE=${default_sim_float_bitsize}"
  44 fi
  45 ])dnl
  46 ])
  47 AC_SUBST(sim_float)