1 files changed, 38 insertions, 0 deletions

diff --git a/include/asm-m32r/div64.h b/include/asm-m32r/div64.h
new file mode 100644
index 000000000000..417a51bd552d
--- /dev/null
+++ b/include/asm-m32r/div64.h
@@ -0,0 +1,38 @@
+#ifndef _ASM_M32R_DIV64
+#define _ASM_M32R_DIV64
+
+/* $Id$ */
+
+/* unsigned long long division.
+ * Input:
+ *  unsigned long long  n
+ *  unsigned long  base
+ * Output:
+ *  n = n / base;
+ *  return value = n % base;
+ */
+#define do_div(n, base)                                         \
+({                                                              \
+        unsigned long _res, _high, _mid, _low;                  \
+                                                                \
+        _low = (n) & 0xffffffffUL;                              \
+        _high = (n) >> 32;                                      \
+        if (_high) {                                            \
+                _mid = (_high % (unsigned long)(base)) << 16;   \
+                _high = _high / (unsigned long)(base);          \
+                _mid += _low >> 16;                             \
+                _low &= 0x0000ffffUL;                           \
+                _low += (_mid % (unsigned long)(base)) << 16;   \
+                _mid = _mid / (unsigned long)(base);            \
+                _res = _low % (unsigned long)(base);            \
+                _low = _low / (unsigned long)(base);            \
+                n = _low + ((long long)_mid << 16) +            \
+                        ((long long)_high << 32);               \
+        } else {                                                \
+                _res = _low % (unsigned long)(base);            \
+                n = (_low / (unsigned long)(base));             \
+        }                                                       \
+        _res;                                                   \
+})
+
+#endif  /* _ASM_M32R_DIV64 */