1 //===-- cmpdi2.c - Implement __cmpdi2 -------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements __cmpdi2 for the compiler_rt library. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "int_lib.h" 14 15 // Returns: if (a < b) returns 0 16 // if (a == b) returns 1 17 // if (a > b) returns 2 18 19 COMPILER_RT_ABI si_int __cmpdi2(di_int a, di_int b) { 20 dwords x; 21 x.all = a; 22 dwords y; 23 y.all = b; 24 if (x.s.high < y.s.high) 25 return 0; 26 if (x.s.high > y.s.high) 27 return 2; 28 if (x.s.low < y.s.low) 29 return 0; 30 if (x.s.low > y.s.low) 31 return 2; 32 return 1; 33 } 34 35 #ifdef __ARM_EABI__ 36 // Returns: if (a < b) returns -1 37 // if (a == b) returns 0 38 // if (a > b) returns 1 39 COMPILER_RT_ABI si_int __aeabi_lcmp(di_int a, di_int b) { 40 return __cmpdi2(a, b) - 1; 41 } 42 #endif 43