1 files changed, 71 insertions, 0 deletions
diff --git a/libgcc/config/lm32/_modsi3.c b/libgcc/config/lm32/_modsi3.c
new file mode 100644
index 00000000000..a4a3d320a8f
--- /dev/null
+++ b/libgcc/config/lm32/_modsi3.c
@@ -0,0 +1,71 @@
+/* _modsi3 for Lattice Mico32.
+   Contributed by Jon Beniston <jon@beniston.com> 
+   
+   Copyright (C) 2009 Free Software Foundation, Inc.
+
+   This file 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.
+   
+   This file 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/>. */
+
+#include "libgcc_lm32.h"
+
+/* Signed integer modulus.  */
+
+SItype
+__modsi3 (SItype a, SItype b)
+{
+  int neg = 0;
+  SItype res;
+  int cfg;
+
+  if (b == 0)
+    {
+      /* Raise divide by zero exception.  */
+      int eba, sr;
+      /* Save interrupt enable.  */
+      __asm__ __volatile__ ("rcsr %0, IE":"=r" (sr));
+      sr = (sr & 1) << 1;
+      __asm__ __volatile__ ("wcsr IE, %0"::"r" (sr));
+      /* Branch to exception handler.  */
+      __asm__ __volatile__ ("rcsr %0, EBA":"=r" (eba));
+      eba += 32 * 5;
+      __asm__ __volatile__ ("mv ea, ra");
+      __asm__ __volatile__ ("b %0"::"r" (eba));
+      __builtin_unreachable ();
+    }
+
+  if (a < 0)
+    {
+      a = -a;
+      neg = 1;
+    }
+
+  if (b < 0)
+    b = -b;
+
+__asm__ ("rcsr %0, CFG":"=r" (cfg));
+  if (cfg & 2)
+  __asm__ ("modu %0, %1, %2": "=r" (res):"r" (a), "r" (b));
+  else
+    res = __udivmodsi4 (a, b, 1);
+
+  if (neg)
+    res = -res;
+
+  return res;
+}