/* ===-- subvsi3.c - Implement __subvsi3 -----------------------------------=== * * The LLVM Compiler Infrastructure * * This file is dual licensed under the MIT and the University of Illinois Open * Source Licenses. See LICENSE.TXT for details. * * ===----------------------------------------------------------------------=== * * This file implements __subvsi3 for the compiler_rt library. * * ===----------------------------------------------------------------------=== */ #include "int_lib.h" /* Returns: a - b */ /* Effects: aborts if a - b overflows */ COMPILER_RT_ABI si_int __subvsi3(si_int a, si_int b) { si_int s = (su_int) a - (su_int) b; if (b >= 0) { if (s > a) compilerrt_abort(); } else { if (s <= a) compilerrt_abort(); } return s; } |