addvsi3.c revision 214152
1214152Sed/* ===-- addvsi3.c - Implement __addvsi3 -----------------------------------=== 2214152Sed * 3214152Sed * The LLVM Compiler Infrastructure 4214152Sed * 5214152Sed * This file is distributed under the University of Illinois Open Source 6214152Sed * License. See LICENSE.TXT for details. 7214152Sed * 8214152Sed * ===----------------------------------------------------------------------=== 9214152Sed * 10214152Sed * This file implements __addvsi3 for the compiler_rt library. 11214152Sed * 12214152Sed * ===----------------------------------------------------------------------=== 13214152Sed */ 14214152Sed 15214152Sed#include "int_lib.h" 16214152Sed#include <stdlib.h> 17214152Sed 18214152Sed/* Returns: a + b */ 19214152Sed 20214152Sed/* Effects: aborts if a + b overflows */ 21214152Sed 22214152Sedsi_int 23214152Sed__addvsi3(si_int a, si_int b) 24214152Sed{ 25214152Sed si_int s = a + b; 26214152Sed if (b >= 0) 27214152Sed { 28214152Sed if (s < a) 29214152Sed compilerrt_abort(); 30214152Sed } 31214152Sed else 32214152Sed { 33214152Sed if (s >= a) 34214152Sed compilerrt_abort(); 35214152Sed } 36214152Sed return s; 37214152Sed} 38