//===-- moddi3.c - Implement __moddi3 -------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file implements __moddi3 for the compiler_rt library. // //===----------------------------------------------------------------------===// #include "int_lib.h" // Returns: a % b COMPILER_RT_ABI di_int __moddi3(di_int a, di_int b) { const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; di_int s = b >> bits_in_dword_m1; // s = b < 0 ? -1 : 0 b = (b ^ s) - s; // negate if s == -1 s = a >> bits_in_dword_m1; // s = a < 0 ? -1 : 0 a = (a ^ s) - s; // negate if s == -1 du_int r; __udivmoddi4(a, b, &r); return ((di_int)r ^ s) - s; // negate if s == -1 } |