1*0a6a1f1dSLionel Sambuc /* ===-- modti3.c - Implement __modti3 -------------------------------------=== 2*0a6a1f1dSLionel Sambuc * 3*0a6a1f1dSLionel Sambuc * The LLVM Compiler Infrastructure 4*0a6a1f1dSLionel Sambuc * 5*0a6a1f1dSLionel Sambuc * This file is dual licensed under the MIT and the University of Illinois Open 6*0a6a1f1dSLionel Sambuc * Source Licenses. See LICENSE.TXT for details. 7*0a6a1f1dSLionel Sambuc * 8*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 9*0a6a1f1dSLionel Sambuc * 10*0a6a1f1dSLionel Sambuc * This file implements __modti3 for the compiler_rt library. 11*0a6a1f1dSLionel Sambuc * 12*0a6a1f1dSLionel Sambuc * ===----------------------------------------------------------------------=== 13*0a6a1f1dSLionel Sambuc */ 14*0a6a1f1dSLionel Sambuc 15*0a6a1f1dSLionel Sambuc #include "int_lib.h" 16*0a6a1f1dSLionel Sambuc 17*0a6a1f1dSLionel Sambuc #ifdef CRT_HAS_128BIT 18*0a6a1f1dSLionel Sambuc 19*0a6a1f1dSLionel Sambuc /*Returns: a % b */ 20*0a6a1f1dSLionel Sambuc 21*0a6a1f1dSLionel Sambuc COMPILER_RT_ABI ti_int __modti3(ti_int a,ti_int b)22*0a6a1f1dSLionel Sambuc__modti3(ti_int a, ti_int b) 23*0a6a1f1dSLionel Sambuc { 24*0a6a1f1dSLionel Sambuc const int bits_in_tword_m1 = (int)(sizeof(ti_int) * CHAR_BIT) - 1; 25*0a6a1f1dSLionel Sambuc ti_int s = b >> bits_in_tword_m1; /* s = b < 0 ? -1 : 0 */ 26*0a6a1f1dSLionel Sambuc b = (b ^ s) - s; /* negate if s == -1 */ 27*0a6a1f1dSLionel Sambuc s = a >> bits_in_tword_m1; /* s = a < 0 ? -1 : 0 */ 28*0a6a1f1dSLionel Sambuc a = (a ^ s) - s; /* negate if s == -1 */ 29*0a6a1f1dSLionel Sambuc tu_int r; 30*0a6a1f1dSLionel Sambuc __udivmodti4(a, b, &r); 31*0a6a1f1dSLionel Sambuc return ((ti_int)r ^ s) - s; /* negate if s == -1 */ 32*0a6a1f1dSLionel Sambuc } 33*0a6a1f1dSLionel Sambuc 34*0a6a1f1dSLionel Sambuc #endif /* CRT_HAS_128BIT */ 35