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    /* ===-- paritysi2.c - Implement __paritysi2 -------------------------------===  | 
    
    
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     *                     The LLVM Compiler Infrastructure  | 
    
    
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     * This file is dual licensed under the MIT and the University of Illinois Open  | 
    
    
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     * Source Licenses. See LICENSE.TXT for details.  | 
    
    
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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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     */  | 
    
    
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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  | 
    
    
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    __paritysi2(si_int a)  | 
    
    
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    { | 
    
    
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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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    }  |