1156cd587Sjoerg /* ===-- modti3.c - Implement __modti3 -------------------------------------=== 2156cd587Sjoerg * 3156cd587Sjoerg * The LLVM Compiler Infrastructure 4156cd587Sjoerg * 5156cd587Sjoerg * This file is dual licensed under the MIT and the University of Illinois Open 6156cd587Sjoerg * Source Licenses. See LICENSE.TXT for details. 7156cd587Sjoerg * 8156cd587Sjoerg * ===----------------------------------------------------------------------=== 9156cd587Sjoerg * 10156cd587Sjoerg * This file implements __modti3 for the compiler_rt library. 11156cd587Sjoerg * 12156cd587Sjoerg * ===----------------------------------------------------------------------=== 13156cd587Sjoerg */ 14156cd587Sjoerg 15156cd587Sjoerg #include "int_lib.h" 16156cd587Sjoerg 17156cd587Sjoerg #ifdef CRT_HAS_128BIT 18156cd587Sjoerg 19156cd587Sjoerg /*Returns: a % b */ 20156cd587Sjoerg 21*f7f78b33Sjoerg COMPILER_RT_ABI ti_int __modti3(ti_int a,ti_int b)22156cd587Sjoerg__modti3(ti_int a, ti_int b) 23156cd587Sjoerg { 24156cd587Sjoerg const int bits_in_tword_m1 = (int)(sizeof(ti_int) * CHAR_BIT) - 1; 25156cd587Sjoerg ti_int s = b >> bits_in_tword_m1; /* s = b < 0 ? -1 : 0 */ 26156cd587Sjoerg b = (b ^ s) - s; /* negate if s == -1 */ 27156cd587Sjoerg s = a >> bits_in_tword_m1; /* s = a < 0 ? -1 : 0 */ 28156cd587Sjoerg a = (a ^ s) - s; /* negate if s == -1 */ 29*f7f78b33Sjoerg tu_int r; 30*f7f78b33Sjoerg __udivmodti4(a, b, &r); 31*f7f78b33Sjoerg return ((ti_int)r ^ s) - s; /* negate if s == -1 */ 32156cd587Sjoerg } 33156cd587Sjoerg 34156cd587Sjoerg #endif /* CRT_HAS_128BIT */ 35