1 files changed, 26 insertions, 0 deletions
diff --git a/lib/paritysi2.c b/lib/paritysi2.c
new file mode 100644
index 000000000..c38f9cf2a
--- /dev/null
+++ b/lib/paritysi2.c
@@ -0,0 +1,26 @@
+//===-- paritysi2.c - Implement __paritysi2 -------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __paritysi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: 1 if number of bits is odd else returns 0
+
+si_int
+__paritysi2(si_int a)
+{
+    su_int x = (su_int)a;
+    x ^= x >> 16;
+    x ^= x >> 8;
+    x ^= x >> 4;
+    return (0x6996 >> (x & 0xF)) & 1;
+}