1 files changed, 23 insertions, 0 deletions
diff --git a/cpukit/compiler-rt/lib/builtins/paritysi2.c b/cpukit/compiler-rt/lib/builtins/paritysi2.c
new file mode 100644
index 0000000000..a4b84e0806
--- /dev/null
+++ b/cpukit/compiler-rt/lib/builtins/paritysi2.c
@@ -0,0 +1,23 @@
+//===-- paritysi2.c - Implement __paritysi2 -------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __paritysi2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+
+// Returns: 1 if number of bits is odd else returns 0
+
+COMPILER_RT_ABI 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;
+}