1*0a6a1f1dSLionel Sambuc /* ===-- paritysi2.c - Implement __paritysi2 -------------------------------=== 2*0a6a1f1dSLionel Sambuc * 3*0a6a1f1dSLionel Sambuc * The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc * 5*0a6a1f1dSLionel Sambuc * This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc * Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc * 8*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 9*0a6a1f1dSLionel Sambuc * 10*0a6a1f1dSLionel Sambuc * This file implements __paritysi2 for the compiler_rt library. 11*0a6a1f1dSLionel Sambuc * 12*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 13*0a6a1f1dSLionel Sambuc */ 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc #include "int_lib.h" 16*0a6a1f1dSLionel Sambuc 17*0a6a1f1dSLionel Sambuc /* Returns: 1 if number of bits is odd else returns 0 */ 18*0a6a1f1dSLionel Sambuc 19*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI si_int __paritysi2(si_int a)20*0a6a1f1dSLionel Sambuc__paritysi2(si_int a) 21*0a6a1f1dSLionel Sambuc { 22*0a6a1f1dSLionel Sambuc su_int x = (su_int)a; 23*0a6a1f1dSLionel Sambuc x ^= x >> 16; 24*0a6a1f1dSLionel Sambuc x ^= x >> 8; 25*0a6a1f1dSLionel Sambuc x ^= x >> 4; 26*0a6a1f1dSLionel Sambuc return (0x6996 >> (x & 0xF)) & 1; 27*0a6a1f1dSLionel Sambuc } 28