Move original compiler-rt functions (libgcc replacement) to lib/builtins directory

llvm-svn: 201393

1 files changed, 42 insertions, 0 deletions

diff --git a/compiler-rt/lib/builtins/cmpti2.c b/compiler-rt/lib/builtins/cmpti2.c
new file mode 100644
index 00000000000..d0aec452a46
--- /dev/null
+++ b/compiler-rt/lib/builtins/cmpti2.c
@@ -0,0 +1,42 @@
+/* ===-- cmpti2.c - Implement __cmpti2 -------------------------------------===
+ *
+ *                     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 __cmpti2 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+#include "int_lib.h"
+
+#if __x86_64
+
+/* Returns:  if (a <  b) returns 0
+ *           if (a == b) returns 1
+ *           if (a >  b) returns 2
+ */
+
+si_int
+__cmpti2(ti_int a, ti_int b)
+{
+    twords x;
+    x.all = a;
+    twords y;
+    y.all = b;
+    if (x.s.high < y.s.high)
+        return 0;
+    if (x.s.high > y.s.high)
+        return 2;
+    if (x.s.low < y.s.low)
+        return 0;
+    if (x.s.low > y.s.low)
+        return 2;
+    return 1;
+}
+
+#endif