1 /* ===-- addvti3.c - Implement __addvti3 -----------------------------------=== 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 __addvti3 for the compiler_rt library. 11 * 12 * ===----------------------------------------------------------------------=== 13 */ 14 15 #if __x86_64 16 17 #include "int_lib.h" 18 #include <stdlib.h> 19 20 /* Returns: a + b */ 21 22 /* Effects: aborts if a + b overflows */ 23 24 ti_int 25 __addvti3(ti_int a, ti_int b) 26 { 27 ti_int s = a + b; 28 if (b >= 0) 29 { 30 if (s < a) 31 abort(); 32 } 33 else 34 { 35 if (s >= a) 36 abort(); 37 } 38 return s; 39 } 40 41 #endif 42
