addvti3.c revision 276789
1276789Sdim/* ===-- addvti3.c - Implement __addvti3 -----------------------------------=== 2276789Sdim * 3276789Sdim * The LLVM Compiler Infrastructure 4276789Sdim * 5276789Sdim * This file is dual licensed under the MIT and the University of Illinois Open 6276789Sdim * Source Licenses. See LICENSE.TXT for details. 7276789Sdim * 8276789Sdim * ===----------------------------------------------------------------------=== 9276789Sdim * 10276789Sdim * This file implements __addvti3 for the compiler_rt library. 11276789Sdim * 12276789Sdim * ===----------------------------------------------------------------------=== 13276789Sdim */ 14276789Sdim 15276789Sdim#include "int_lib.h" 16276789Sdim 17276789Sdim#ifdef CRT_HAS_128BIT 18276789Sdim 19276789Sdim/* Returns: a + b */ 20276789Sdim 21276789Sdim/* Effects: aborts if a + b overflows */ 22276789Sdim 23276789SdimCOMPILER_RT_ABI ti_int 24276789Sdim__addvti3(ti_int a, ti_int b) 25276789Sdim{ 26276789Sdim ti_int s = (tu_int) a + (tu_int) b; 27276789Sdim if (b >= 0) 28276789Sdim { 29276789Sdim if (s < a) 30276789Sdim compilerrt_abort(); 31276789Sdim } 32276789Sdim else 33276789Sdim { 34276789Sdim if (s >= a) 35276789Sdim compilerrt_abort(); 36276789Sdim } 37276789Sdim return s; 38276789Sdim} 39276789Sdim 40276789Sdim#endif /* CRT_HAS_128BIT */ 41