1 files changed, 31 insertions, 0 deletions
diff --git a/lib/divsi3.c b/lib/divsi3.c
new file mode 100644
index 000000000000..0eff6ef0d735
--- /dev/null
+++ b/lib/divsi3.c
@@ -0,0 +1,31 @@
+/* ===-- divsi3.c - Implement __divsi3 -------------------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __divsi3 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+su_int __udivsi3(su_int n, su_int d);
+
+/* Returns: a / b */
+
+si_int
+__divsi3(si_int a, si_int b)
+{
+    const int bits_in_word_m1 = (int)(sizeof(si_int) * CHAR_BIT) - 1;
+    si_int s_a = a >> bits_in_word_m1;           /* s_a = a < 0 ? -1 : 0 */
+    si_int s_b = b >> bits_in_word_m1;           /* s_b = b < 0 ? -1 : 0 */
+    a = (a ^ s_a) - s_a;                         /* negate if s_a == -1 */
+    b = (b ^ s_b) - s_b;                         /* negate if s_b == -1 */
+    s_a ^= s_b;                                  /* sign of quotient */
+    return (__udivsi3(a, b) ^ s_a) - s_a;        /* negate if s_a == -1 */
+}