1214152Sed/*===-- moddi3.c - Implement __moddi3 -------------------------------------=== 2214152Sed * 3214152Sed * The LLVM Compiler Infrastructure 4214152Sed * 5222656Sed * This file is dual licensed under the MIT and the University of Illinois Open 6222656Sed * Source Licenses. See LICENSE.TXT for details. 7214152Sed * 8214152Sed * ===----------------------------------------------------------------------=== 9214152Sed * 10214152Sed * This file implements __moddi3 for the compiler_rt library. 11214152Sed * 12214152Sed * ===----------------------------------------------------------------------=== 13214152Sed */ 14214152Sed 15214152Sed#include "int_lib.h" 16214152Sed 17222656SedCOMPILER_RT_ABI du_int __udivmoddi4(du_int a, du_int b, du_int* rem); 18214152Sed 19214152Sed/* Returns: a % b */ 20214152Sed 21222656SedCOMPILER_RT_ABI di_int 22214152Sed__moddi3(di_int a, di_int b) 23214152Sed{ 24214152Sed const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; 25214152Sed di_int s = b >> bits_in_dword_m1; /* s = b < 0 ? -1 : 0 */ 26214152Sed b = (b ^ s) - s; /* negate if s == -1 */ 27214152Sed s = a >> bits_in_dword_m1; /* s = a < 0 ? -1 : 0 */ 28214152Sed a = (a ^ s) - s; /* negate if s == -1 */ 29214152Sed di_int r; 30214152Sed __udivmoddi4(a, b, (du_int*)&r); 31214152Sed return (r ^ s) - s; /* negate if s == -1 */ 32214152Sed} 33