1*156cd587Sjoerg /*===-- absvdi2.c - Implement __absvdi2 -----------------------------------=== 2*156cd587Sjoerg * 3*156cd587Sjoerg * The LLVM Compiler Infrastructure 4*156cd587Sjoerg * 5*156cd587Sjoerg * This file is dual licensed under the MIT and the University of Illinois Open 6*156cd587Sjoerg * Source Licenses. See LICENSE.TXT for details. 7*156cd587Sjoerg * 8*156cd587Sjoerg *===----------------------------------------------------------------------=== 9*156cd587Sjoerg * 10*156cd587Sjoerg * This file implements __absvdi2 for the compiler_rt library. 11*156cd587Sjoerg * 12*156cd587Sjoerg *===----------------------------------------------------------------------=== 13*156cd587Sjoerg */ 14*156cd587Sjoerg 15*156cd587Sjoerg #include "int_lib.h" 16*156cd587Sjoerg 17*156cd587Sjoerg /* Returns: absolute value */ 18*156cd587Sjoerg 19*156cd587Sjoerg /* Effects: aborts if abs(x) < 0 */ 20*156cd587Sjoerg 21*156cd587Sjoerg COMPILER_RT_ABI di_int __absvdi2(di_int a)22*156cd587Sjoerg__absvdi2(di_int a) 23*156cd587Sjoerg { 24*156cd587Sjoerg const int N = (int)(sizeof(di_int) * CHAR_BIT); 25*156cd587Sjoerg if (a == ((di_int)1 << (N-1))) 26*156cd587Sjoerg compilerrt_abort(); 27*156cd587Sjoerg const di_int t = a >> (N - 1); 28*156cd587Sjoerg return (a ^ t) - t; 29*156cd587Sjoerg } 30