1*7c3d14c8STreehugger Robot /* ===-- absvti2.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 __absvti2 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 #ifdef CRT_HAS_128BIT 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot /* Returns: absolute value */ 20*7c3d14c8STreehugger Robot 21*7c3d14c8STreehugger Robot /* Effects: aborts if abs(x) < 0 */ 22*7c3d14c8STreehugger Robot 23*7c3d14c8STreehugger Robot COMPILER_RT_ABI ti_int __absvti2(ti_int a)24*7c3d14c8STreehugger Robot__absvti2(ti_int a) 25*7c3d14c8STreehugger Robot { 26*7c3d14c8STreehugger Robot const int N = (int)(sizeof(ti_int) * CHAR_BIT); 27*7c3d14c8STreehugger Robot if (a == ((ti_int)1 << (N-1))) 28*7c3d14c8STreehugger Robot compilerrt_abort(); 29*7c3d14c8STreehugger Robot const ti_int s = a >> (N - 1); 30*7c3d14c8STreehugger Robot return (a ^ s) - s; 31*7c3d14c8STreehugger Robot } 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot #endif /* CRT_HAS_128BIT */ 34*7c3d14c8STreehugger Robot 35