1 files changed, 72 insertions, 0 deletions
diff --git a/newlib/libc/machine/h8500/mulsi3.c b/newlib/libc/machine/h8500/mulsi3.c
new file mode 100644
index 000000000..a923e8db5
--- /dev/null
+++ b/newlib/libc/machine/h8500/mulsi3.c
@@ -0,0 +1,72 @@
+
+typedef union {
+  struct {
+  unsigned int msw;
+  unsigned int lsw;
+} s;
+  long v;
+} u;
+
+long __mulsi3(u a, u b)
+{
+  int s;
+  long pp1;
+  long pp2;
+  long r;
+
+  if (a.s.msw == 0 &&
+      b.s.msw == 0)
+    {
+      return (long)a.s.lsw * b.s.lsw;
+    }
+
+  s = 0;
+  if (a.v < 0)
+    {
+      s = 1;
+      a.v = - a.v;
+    }
+  if (b.v < 0)
+    { 
+      s = 1-s;
+      b.v = - b.v;
+    }
+
+  pp1 = (long)a.s.lsw * b.s.lsw ;
+  pp2 = (long)a.s.lsw * b.s.msw + (long)a.s.msw * b.s.lsw;
+
+  pp1 += pp2 << 16;
+
+  if (s)
+    {
+      pp1 = -pp1;
+    }
+  return pp1;
+}
+long __mulpsi3(long a, long b)
+{
+ return a*b;
+}
+
+
+short 
+__mulhi3(short a, short b)
+{
+  int r;
+
+  r = 0;
+  while (a) 
+    {
+      if (a & 1) 
+	{
+	  r += b;
+
+	}
+      b<<=1;
+      a>>=1;
+
+    }
+  return r;
+}
+
+