1*7c3d14c8STreehugger Robot /*===-- absvdi2.c - Implement __absvdi2 -----------------------------------=== 2*7c3d14c8STreehugger Robot * 3*7c3d14c8STreehugger Robot * The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot * 5*7c3d14c8STreehugger Robot * This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot * Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot * 8*7c3d14c8STreehugger Robot *===----------------------------------------------------------------------=== 9*7c3d14c8STreehugger Robot * 10*7c3d14c8STreehugger Robot * This file implements __absvdi2 for the compiler_rt library. 11*7c3d14c8STreehugger Robot * 12*7c3d14c8STreehugger Robot *===----------------------------------------------------------------------=== 13*7c3d14c8STreehugger Robot */ 14*7c3d14c8STreehugger Robot 15*7c3d14c8STreehugger Robot #include "int_lib.h" 16*7c3d14c8STreehugger Robot 17*7c3d14c8STreehugger Robot /* Returns: absolute value */ 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot /* Effects: aborts if abs(x) < 0 */ 20*7c3d14c8STreehugger Robot 21*7c3d14c8STreehugger Robot COMPILER_RT_ABI di_int __absvdi2(di_int a)22*7c3d14c8STreehugger Robot__absvdi2(di_int a) 23*7c3d14c8STreehugger Robot { 24*7c3d14c8STreehugger Robot const int N = (int)(sizeof(di_int) * CHAR_BIT); 25*7c3d14c8STreehugger Robot if (a == ((di_int)1 << (N-1))) 26*7c3d14c8STreehugger Robot compilerrt_abort(); 27*7c3d14c8STreehugger Robot const di_int t = a >> (N - 1); 28*7c3d14c8STreehugger Robot return (a ^ t) - t; 29*7c3d14c8STreehugger Robot } 30