This patch adds two files which implement HImode unsigned divide
and mod for GCC on platforms where that is needed and not provided
in hardware. The code is lifted from the corresponding SImode
functions, with the obvious tweaks.
I'm not sure if I can commit this.
paul
2018-05-29 Paul Koning <n...@arrl.net>
* udivhi3.c: New file.
* udivmodhi4.c: New file.
* config/pdp11/t-pdp11 (LIB2ADD): Add the above files.
Index: config/pdp11/t-pdp11
===================================================================
--- config/pdp11/t-pdp11 (revision 260806)
+++ config/pdp11/t-pdp11 (working copy)
@@ -1,5 +1,7 @@
LIB2ADD = $(srcdir)/udivmod.c \
$(srcdir)/udivmodsi4.c \
+ $(srcdir)/udivhi3.c \
+ $(srcdir)/udivmodhi4.c \
$(srcdir)/memcmp.c \
$(srcdir)/memcpy.c \
$(srcdir)/memmove.c \
Index: udivhi3.c
===================================================================
--- udivhi3.c (nonexistent)
+++ udivhi3.c (working copy)
@@ -0,0 +1,37 @@
+/* Copyright (C) 2000-2018 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+short udivmodhi4 ();
+
+short
+__udivhi3 (short a, short b)
+{
+ return udivmodhi4 (a, b, 0);
+}
+
+short
+__umodhi3 (short a, short b)
+{
+ return udivmodhi4 (a, b, 1);
+}
+
Property changes on: udivhi3.c
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
Index: udivmodhi4.c
===================================================================
--- udivmodhi4.c (nonexistent)
+++ udivmodhi4.c (working copy)
@@ -0,0 +1,47 @@
+/* Copyright (C) 2000-2018 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+unsigned short
+udivmodhi4(unsigned short num, unsigned short den, int modwanted)
+{
+ unsigned short bit = 1;
+ unsigned short res = 0;
+
+ while (den < num && bit && !(den & (1<<15)))
+ {
+ den <<=1;
+ bit <<=1;
+ }
+ while (bit)
+ {
+ if (num >= den)
+ {
+ num -= den;
+ res |= bit;
+ }
+ bit >>=1;
+ den >>=1;
+ }
+ if (modwanted) return num;
+ return res;
+}
Property changes on: udivmodhi4.c
___________________________________________________________________
Added: svn:eol-style
## -0,0 +1 ##
+native
\ No newline at end of property
