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