compiler-rt/lib/builtins/cmpti2.c

   1 //===-- cmpti2.c - Implement __cmpti2 -------------------------------------===//
   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 __cmpti2 for the compiler_rt library.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "int_lib.h"
  14
  15 #ifdef CRT_HAS_128BIT
  16
  17 // Returns:  if (a <  b) returns 0
  18 //           if (a == b) returns 1
  19 //           if (a >  b) returns 2
  20
  21 COMPILER_RT_ABI si_int __cmpti2(ti_int a, ti_int b) {
  22   twords x;
  23   x.all = a;
  24   twords y;
  25   y.all = b;
  26   if (x.s.high < y.s.high)
  27     return 0;
  28   if (x.s.high > y.s.high)
  29     return 2;
  30   if (x.s.low < y.s.low)
  31     return 0;
  32   if (x.s.low > y.s.low)
  33     return 2;
  34   return 1;
  35 }
  36
  37 #endif // CRT_HAS_128BIT