1*0a6a1f1dSLionel Sambuc /* ===-- addvsi3.c - Implement __addvsi3 -----------------------------------=== 2*0a6a1f1dSLionel Sambuc * 3*0a6a1f1dSLionel Sambuc * The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc * 5*0a6a1f1dSLionel Sambuc * This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc * Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc * 8*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 9*0a6a1f1dSLionel Sambuc * 10*0a6a1f1dSLionel Sambuc * This file implements __addvsi3 for the compiler_rt library. 11*0a6a1f1dSLionel Sambuc * 12*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 13*0a6a1f1dSLionel Sambuc */ 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc #include "int_lib.h" 16*0a6a1f1dSLionel Sambuc 17*0a6a1f1dSLionel Sambuc /* Returns: a + b */ 18*0a6a1f1dSLionel Sambuc 19*0a6a1f1dSLionel Sambuc /* Effects: aborts if a + b overflows */ 20*0a6a1f1dSLionel Sambuc 21*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI si_int __addvsi3(si_int a,si_int b)22*0a6a1f1dSLionel Sambuc__addvsi3(si_int a, si_int b) 23*0a6a1f1dSLionel Sambuc { 24*0a6a1f1dSLionel Sambuc si_int s = a + b; 25*0a6a1f1dSLionel Sambuc if (b >= 0) 26*0a6a1f1dSLionel Sambuc { 27*0a6a1f1dSLionel Sambuc if (s < a) 28*0a6a1f1dSLionel Sambuc compilerrt_abort(); 29*0a6a1f1dSLionel Sambuc } 30*0a6a1f1dSLionel Sambuc else 31*0a6a1f1dSLionel Sambuc { 32*0a6a1f1dSLionel Sambuc if (s >= a) 33*0a6a1f1dSLionel Sambuc compilerrt_abort(); 34*0a6a1f1dSLionel Sambuc } 35*0a6a1f1dSLionel Sambuc return s; 36*0a6a1f1dSLionel Sambuc } 37