lib/builtins/cmpti2.c

   1 /* ===-- cmpti2.c - Implement __cmpti2 -------------------------------------===
   2  *
   3  *                     The LLVM Compiler Infrastructure
   4  *
   5  * This file is dual licensed under the MIT and the University of Illinois Open
   6  * Source Licenses. See LICENSE.TXT for details.
   7  *
   8  * ===----------------------------------------------------------------------===
   9  *
  10  * This file implements __cmpti2 for the compiler_rt library.
  11  *
  12  * ===----------------------------------------------------------------------===
  13  */
  14
  15 #include "int_lib.h"
  16
  17 #ifdef CRT_HAS_128BIT
  18
  19 /* Returns:  if (a <  b) returns 0
  20  *           if (a == b) returns 1
  21  *           if (a >  b) returns 2
  22  */
  23
  24 COMPILER_RT_ABI si_int
  25 __cmpti2(ti_int a, ti_int b)
  26 {
  27     twords x;
  28     x.all = a;
  29     twords y;
  30     y.all = b;
  31     if (x.s.high < y.s.high)
  32         return 0;
  33     if (x.s.high > y.s.high)
  34         return 2;
  35     if (x.s.low < y.s.low)
  36         return 0;
  37     if (x.s.low > y.s.low)
  38         return 2;
  39     return 1;
  40 }
  41
  42 #endif /* CRT_HAS_128BIT */