1*3cab2bb3Spatrick //===-- subvti3.c - Implement __subvti3 -----------------------------------===// 2*3cab2bb3Spatrick // 3*3cab2bb3Spatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*3cab2bb3Spatrick // See https://llvm.org/LICENSE.txt for license information. 5*3cab2bb3Spatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*3cab2bb3Spatrick // 7*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 8*3cab2bb3Spatrick // 9*3cab2bb3Spatrick // This file implements __subvti3 for the compiler_rt library. 10*3cab2bb3Spatrick // 11*3cab2bb3Spatrick //===----------------------------------------------------------------------===// 12*3cab2bb3Spatrick 13*3cab2bb3Spatrick #include "int_lib.h" 14*3cab2bb3Spatrick 15*3cab2bb3Spatrick #ifdef CRT_HAS_128BIT 16*3cab2bb3Spatrick 17*3cab2bb3Spatrick // Returns: a - b 18*3cab2bb3Spatrick 19*3cab2bb3Spatrick // Effects: aborts if a - b overflows 20*3cab2bb3Spatrick __subvti3(ti_int a,ti_int b)21*3cab2bb3SpatrickCOMPILER_RT_ABI ti_int __subvti3(ti_int a, ti_int b) { 22*3cab2bb3Spatrick ti_int s = (tu_int)a - (tu_int)b; 23*3cab2bb3Spatrick if (b >= 0) { 24*3cab2bb3Spatrick if (s > a) 25*3cab2bb3Spatrick compilerrt_abort(); 26*3cab2bb3Spatrick } else { 27*3cab2bb3Spatrick if (s <= a) 28*3cab2bb3Spatrick compilerrt_abort(); 29*3cab2bb3Spatrick } 30*3cab2bb3Spatrick return s; 31*3cab2bb3Spatrick } 32*3cab2bb3Spatrick 33*3cab2bb3Spatrick #endif // CRT_HAS_128BIT 34