137a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan/* ===-- addvsi3.c - Implement __addvsi3 -----------------------------------=== 237a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * 337a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * The LLVM Compiler Infrastructure 437a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * 59ad441ffec97db647fee3725b3424284fb913e14Howard Hinnant * This file is dual licensed under the MIT and the University of Illinois Open 69ad441ffec97db647fee3725b3424284fb913e14Howard Hinnant * Source Licenses. See LICENSE.TXT for details. 737a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * 837a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * ===----------------------------------------------------------------------=== 937a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * 1037a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * This file implements __addvsi3 for the compiler_rt library. 1137a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * 1237a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan * ===----------------------------------------------------------------------=== 1337a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan */ 14b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar 15b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar#include "int_lib.h" 16b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar 1737a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan/* Returns: a + b */ 18b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar 1937a6a455466e5b197311771a777ab241e471ed8aEdward O'Callaghan/* Effects: aborts if a + b overflows */ 20b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar 211c5f89b1dd741135a4007ab577723d422f421eecAnton KorobeynikovCOMPILER_RT_ABI si_int 22b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar__addvsi3(si_int a, si_int b) 23b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar{ 24b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar si_int s = a + b; 25b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar if (b >= 0) 26b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar { 27b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar if (s < a) 2848f46ac1d9a82210f6e469567cb60aa7e7cd2f3bDaniel Dunbar compilerrt_abort(); 29b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar } 30b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar else 31b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar { 32b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar if (s >= a) 3348f46ac1d9a82210f6e469567cb60aa7e7cd2f3bDaniel Dunbar compilerrt_abort(); 34b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar } 35b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar return s; 36b3a6901e66f55b35aa9e01bcb24134e6a65ea004Daniel Dunbar} 37