1*7c3d14c8STreehugger Robot /*===-- moddi3.c - Implement __moddi3 -------------------------------------=== 2*7c3d14c8STreehugger Robot * 3*7c3d14c8STreehugger Robot * The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot * 5*7c3d14c8STreehugger Robot * This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot * Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot * 8*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 9*7c3d14c8STreehugger Robot * 10*7c3d14c8STreehugger Robot * This file implements __moddi3 for the compiler_rt library. 11*7c3d14c8STreehugger Robot * 12*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 13*7c3d14c8STreehugger Robot */ 14*7c3d14c8STreehugger Robot 15*7c3d14c8STreehugger Robot #include "int_lib.h" 16*7c3d14c8STreehugger Robot 17*7c3d14c8STreehugger Robot /* Returns: a % b */ 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot COMPILER_RT_ABI di_int __moddi3(di_int a,di_int b)20*7c3d14c8STreehugger Robot__moddi3(di_int a, di_int b) 21*7c3d14c8STreehugger Robot { 22*7c3d14c8STreehugger Robot const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; 23*7c3d14c8STreehugger Robot di_int s = b >> bits_in_dword_m1; /* s = b < 0 ? -1 : 0 */ 24*7c3d14c8STreehugger Robot b = (b ^ s) - s; /* negate if s == -1 */ 25*7c3d14c8STreehugger Robot s = a >> bits_in_dword_m1; /* s = a < 0 ? -1 : 0 */ 26*7c3d14c8STreehugger Robot a = (a ^ s) - s; /* negate if s == -1 */ 27*7c3d14c8STreehugger Robot du_int r; 28*7c3d14c8STreehugger Robot __udivmoddi4(a, b, &r); 29*7c3d14c8STreehugger Robot return ((di_int)r ^ s) - s; /* negate if s == -1 */ 30*7c3d14c8STreehugger Robot } 31