1 /*===-- negvti2.c - Implement __negvti2 -----------------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 *===----------------------------------------------------------------------=== 9 * 10 *This file implements __negvti2 for the compiler_rt library. 11 * 12 *===----------------------------------------------------------------------=== 13 */ 14 15 #include "int_lib.h" 16 17 #if __x86_64 18 19 /* Returns: -a */ 20 21 /* Effects: aborts if -a overflows */ 22 23 ti_int 24 __negvti2(ti_int a) 25 { 26 const ti_int MIN = (ti_int)1 << ((int)(sizeof(ti_int) * CHAR_BIT)-1); 27 if (a == MIN) 28 compilerrt_abort(); 29 return -a; 30 } 31 32 #endif 33
