sim: common: split up acinclude.m4 into individual m4 files

This file is quite large and is getting unmanageable.  Split it apart
to follow aclocal best practices by putting one-macro-per-file.  There
shouldn't be any real functional changes here as can be seen in the
configure script regens.

1 files changed, 66 insertions, 0 deletions

diff --git a/sim/m4/sim_ac_option_alignment.m4 b/sim/m4/sim_ac_option_alignment.m4
new file mode 100644
index 0000000..dcfa479
--- /dev/null
+++ b/sim/m4/sim_ac_option_alignment.m4
@@ -0,0 +1,66 @@
+dnl   Copyright (C) 1997-2021 Free Software Foundation, Inc.
+dnl
+dnl This program is free software; you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation; either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
+dnl
+dnl Specify the alignment restrictions of the target architecture.
+dnl Without this option all possible alignment restrictions are accommodated.
+dnl arg[1] is hardwired target alignment
+dnl arg[2] is default target alignment
+AC_DEFUN([SIM_AC_OPTION_ALIGNMENT],
+wire_alignment="[$1]"
+default_alignment="[$2]"
+[
+AC_ARG_ENABLE(sim-alignment,
+[AS_HELP_STRING([--enable-sim-alignment=align],
+		[Specify strict, nonstrict or forced alignment of memory accesses])],
+[case "${enableval}" in
+  strict | STRICT)       sim_alignment="-DWITH_ALIGNMENT=STRICT_ALIGNMENT";;
+  nonstrict | NONSTRICT) sim_alignment="-DWITH_ALIGNMENT=NONSTRICT_ALIGNMENT";;
+  forced | FORCED)       sim_alignment="-DWITH_ALIGNMENT=FORCED_ALIGNMENT";;
+  yes) if test x"$wire_alignment" != x; then
+	 sim_alignment="-DWITH_ALIGNMENT=${wire_alignment}"
+       else
+         if test x"$default_alignment" != x; then
+           sim_alignment="-DWITH_ALIGNMENT=${default_alignment}"
+         else
+	   echo "No hard-wired alignment for target $target" 1>&6
+	   sim_alignment="-DWITH_ALIGNMENT=0"
+         fi
+       fi;;
+  no)  if test x"$default_alignment" != x; then
+	 sim_alignment="-DWITH_DEFAULT_ALIGNMENT=${default_alignment}"
+       else
+         if test x"$wire_alignment" != x; then
+	   sim_alignment="-DWITH_DEFAULT_ALIGNMENT=${wire_alignment}"
+         else
+           echo "No default alignment for target $target" 1>&6
+           sim_alignment="-DWITH_DEFAULT_ALIGNMENT=0"
+         fi
+       fi;;
+  *)   AC_MSG_ERROR("Unknown value $enableval passed to --enable-sim-alignment"); sim_alignment="";;
+esac
+if test x"$silent" != x"yes" && test x"$sim_alignment" != x""; then
+  echo "Setting alignment flags = $sim_alignment" 6>&1
+fi],
+[if test x"$default_alignment" != x; then
+  sim_alignment="-DWITH_DEFAULT_ALIGNMENT=${default_alignment}"
+else
+  if test x"$wire_alignment" != x; then
+    sim_alignment="-DWITH_ALIGNMENT=${wire_alignment}"
+  else
+    sim_alignment=
+  fi
+fi])dnl
+])dnl
+AC_SUBST(sim_alignment)