1 files changed, 45 insertions, 0 deletions
diff --git a/softint/divu.c b/softint/divu.c
new file mode 100755
index 0000000..1779a0b
--- /dev/null
+++ b/softint/divu.c
@@ -0,0 +1,45 @@
+
+#include <stdint.h>
+
+long 
+ softint_divu( long rs1, long rs2 )
+{
+  // only designed to work for mabi=32
+  // quotient = dividend / divisor + remainder
+  unsigned long long dividend = rs1;
+  unsigned long long divisor  = rs2;
+
+
+  if (divisor == 0) return -1; 
+
+  unsigned long long temp_dividend = dividend;
+  unsigned long long temp_divisor = divisor;
+
+  unsigned long long quotient = 0;
+
+
+  for (int i=0; i <= 32; i++)
+  {
+    unsigned long long temp_quotient = 1;
+     
+    if (temp_divisor == temp_dividend)  { quotient += 1; break;}
+    else if (temp_dividend < temp_divisor) { quotient += 0; break; }
+
+    while (temp_divisor <= temp_dividend && temp_quotient != 0)
+    {
+      temp_divisor = temp_divisor << 1;
+      temp_quotient = temp_quotient << 1;
+    }
+
+    temp_divisor = temp_divisor >> 1;
+    temp_quotient = temp_quotient >> 1;
+
+      
+    temp_dividend = temp_dividend - temp_divisor;
+    temp_divisor = divisor;
+    quotient += temp_quotient;
+  }
+
+  return (long) quotient;
+}
+