1 /* ===-- negvsi2.c - Implement __negvsi2 -----------------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is distributed under the University of Illinois Open Source 6 * License. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 * 10 * This file implements __negvsi2 for the compiler_rt library. 11 * 12 * ===----------------------------------------------------------------------=== 13 */ 14 15 #include "int_lib.h" 16 #include <stdlib.h> 17 18 /* Returns: -a */ 19 20 /* Effects: aborts if -a overflows */ 21 22 si_int 23 __negvsi2(si_int a) 24 { 25 const si_int MIN = (si_int)1 << ((int)(sizeof(si_int) * CHAR_BIT)-1); 26 if (a == MIN) 27 abort(); 28 return -a; 29 } 30
