| //===-- 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 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; |
| } |
