Merge pull request #1 from serpilliere/fix_div

Add divti3

miasm/runtime/divti3.c

@@ -0,0 +1,35 @@
+/* ===-- divti3.c - Implement __divti3 -------------------------------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __divti3 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#if __x86_64
+
+#include "int_lib.h"
+
+tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem);
+
+/* Returns: a / b */
+
+ti_int
+__divti3(ti_int a, ti_int b)
+{
+    const int bits_in_tword_m1 = (int)(sizeof(ti_int) * CHAR_BIT) - 1;
+    ti_int s_a = a >> bits_in_tword_m1;           /* s_a = a < 0 ? -1 : 0 */
+    ti_int s_b = b >> bits_in_tword_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 (__udivmodti4(a, b, (tu_int*)0) ^ s_a) - s_a;  /* negate if s_a == -1 */
+}
+
+#endif

setup.py

@@ -160,6 +160,7 @@ def buil_all():
                   ]),
         Extension("miasm.runtime",
                   ["miasm/runtime/udivmodti4.c",
+                   "miasm/runtime/divti3.c",
                    "miasm/runtime/udivti3.c"
                   ]),
         ]