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author | 2020-08-10 21:03:40 +0000 | |
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committer | 2020-08-10 21:03:40 +0000 | |
commit | 3cab2bb3f667058bece8e38b12449a63a9d73c4b (patch) | |
tree | 732ebd68e507f798225d97f4f2dd7ff8468d3e17 /gnu/llvm/compiler-rt/lib/builtins/paritysi2.c | |
parent | Reduce log spam. (diff) | |
download | wireguard-openbsd-3cab2bb3f667058bece8e38b12449a63a9d73c4b.tar.xz wireguard-openbsd-3cab2bb3f667058bece8e38b12449a63a9d73c4b.zip |
Import compiler-rt 10.0.1 release.
ok kettenis@
Diffstat (limited to 'gnu/llvm/compiler-rt/lib/builtins/paritysi2.c')
-rw-r--r-- | gnu/llvm/compiler-rt/lib/builtins/paritysi2.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gnu/llvm/compiler-rt/lib/builtins/paritysi2.c b/gnu/llvm/compiler-rt/lib/builtins/paritysi2.c new file mode 100644 index 00000000000..3efa961f2f8 --- /dev/null +++ b/gnu/llvm/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 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; +} |