cmpdi2.c revision 360660
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 19COMPILER_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 39COMPILER_RT_ABI si_int __aeabi_lcmp(di_int a, di_int b) { 40 return __cmpdi2(a, b) - 1; 41} 42#endif 43