diff options
author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2023-09-29 19:16:26 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2023-11-21 13:25:37 +0100 |
commit | 42c9cdf35f6aa27f41d20b9b170d6e4e83a76913 (patch) | |
tree | e31b61a39959d2cf2a201bbd7318e4fb7003ce9d /cpukit/compiler-rt/lib/builtins/paritydi2.c | |
parent | 31043fa6acdd31a41cf04f8f67f433c784b6000e (diff) |
compiler-rt/lib/builtins: Newqual-98
Diffstat (limited to 'cpukit/compiler-rt/lib/builtins/paritydi2.c')
-rw-r--r-- | cpukit/compiler-rt/lib/builtins/paritydi2.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/cpukit/compiler-rt/lib/builtins/paritydi2.c b/cpukit/compiler-rt/lib/builtins/paritydi2.c new file mode 100644 index 0000000000..350dceb8ce --- /dev/null +++ b/cpukit/compiler-rt/lib/builtins/paritydi2.c @@ -0,0 +1,25 @@ +//===-- paritydi2.c - Implement __paritydi2 -------------------------------===// +// +// 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 __paritydi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +// Returns: 1 if number of bits is odd else returns 0 + +COMPILER_RT_ABI int __paritydi2(di_int a) { + dwords x; + x.all = a; + su_int x2 = x.s.high ^ x.s.low; + x2 ^= x2 >> 16; + x2 ^= x2 >> 8; + x2 ^= x2 >> 4; + return (0x6996 >> (x2 & 0xF)) & 1; +} |