24 lines
754 B
C
24 lines
754 B
C
//===-- paritysi2.c - Implement __paritysi2 -------------------------------===//
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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 __paritysi2 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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// Returns: 1 if number of bits is odd else returns 0
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COMPILER_RT_ABI si_int __paritysi2(si_int a) {
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su_int x = (su_int)a;
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x ^= x >> 16;
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x ^= x >> 8;
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x ^= x >> 4;
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return (0x6996 >> (x & 0xF)) & 1;
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}
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