forked from OSchip/llvm-project
32 lines
888 B
C
32 lines
888 B
C
//===-- parityti2.c - Implement __parityti2 -------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements __parityti2 for the compiler_rt library.
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//
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//===----------------------------------------------------------------------===//
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#include "int_lib.h"
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#ifdef CRT_HAS_128BIT
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// Returns: 1 if number of bits is odd else returns 0
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COMPILER_RT_ABI int __parityti2(ti_int a) {
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twords x;
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dwords x2;
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x.all = a;
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x2.all = x.s.high ^ x.s.low;
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su_int x3 = x2.s.high ^ x2.s.low;
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x3 ^= x3 >> 16;
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x3 ^= x3 >> 8;
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x3 ^= x3 >> 4;
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return (0x6996 >> (x3 & 0xF)) & 1;
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}
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#endif // CRT_HAS_128BIT
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