compiler-rt/test/builtins/Unit/subvti3_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_subvti3
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #ifdef CRT_HAS_128BIT
  10
  11 // Returns: a - b
  12
  13 // Effects: aborts if a - b overflows
  14
  15 COMPILER_RT_ABI ti_int __subvti3(ti_int a, ti_int b);
  16
  17 int test__subvti3(ti_int a, ti_int b)
  18 {
  19     ti_int x = __subvti3(a, b);
  20     ti_int expected = a - b;
  21     if (x != expected)
  22     {
  23         twords at;
  24         at.all = a;
  25         twords bt;
  26         bt.all = b;
  27         twords xt;
  28         xt.all = x;
  29         twords expectedt;
  30         expectedt.all = expected;
  31         printf("error in test__subvsi3(0x%.16llX%.16llX, 0x%.16llX%.16llX) = "
  32                "0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  33                at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
  34                expectedt.s.high, expectedt.s.low);
  35     }
  36     return x != expected;
  37 }
  38
  39 #endif
  40
  41 int main()
  42 {
  43 #ifdef CRT_HAS_128BIT
  44 //     test__subvti3(make_ti(0x8000000000000000LL, 0), 1);  // should abort
  45 //     test__subvti3(0, make_ti(0x8000000000000000LL, 0));  // should abort
  46 //     test__subvti3(1, make_ti(0x8000000000000000LL, 0));  // should abort
  47 //     test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), -1);  // should abort
  48 //     test__subvti3(-2, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL));  // should abort
  49
  50     if (test__subvti3(make_ti(0x8000000000000000LL, 0), -1))
  51         return 1;
  52     if (test__subvti3(make_ti(0x8000000000000000LL, 0), 0))
  53         return 1;
  54     if (test__subvti3(-1, make_ti(0x8000000000000000LL, 0)))
  55         return 1;
  56     if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 1))
  57         return 1;
  58     if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 0))
  59         return 1;
  60     if (test__subvti3(1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
  61         return 1;
  62     if (test__subvti3(0, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
  63         return 1;
  64     if (test__subvti3(-1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
  65         return 1;
  66
  67 #else
  68     printf("skipped\n");
  69 #endif
  70     return 0;
  71 }