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      1 //===-- subvti3_test.c - Test __subvti3 -----------------------------------===//
      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 tests __subvti3 for the compiler_rt library.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "int_lib.h"
     15 #include <stdio.h>
     16 #include <stdlib.h>
     17 
     18 #ifdef CRT_HAS_128BIT
     19 
     20 // Returns: a - b
     21 
     22 // Effects: aborts if a - b overflows
     23 
     24 COMPILER_RT_ABI ti_int __subvti3(ti_int a, ti_int b);
     25 
     26 int test__subvti3(ti_int a, ti_int b)
     27 {
     28     ti_int x = __subvti3(a, b);
     29     ti_int expected = a - b;
     30     if (x != expected)
     31     {
     32         twords at;
     33         at.all = a;
     34         twords bt;
     35         bt.all = b;
     36         twords xt;
     37         xt.all = x;
     38         twords expectedt;
     39         expectedt.all = expected;
     40         printf("error in test__subvsi3(0x%.16llX%.16llX, 0x%.16llX%.16llX) = "
     41                "0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
     42                at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
     43                expectedt.s.high, expectedt.s.low);
     44     }
     45     return x != expected;
     46 }
     47 
     48 #endif
     49 
     50 int main()
     51 {
     52 #ifdef CRT_HAS_128BIT
     53 //     test__subvti3(make_ti(0x8000000000000000LL, 0), 1);  // should abort
     54 //     test__subvti3(0, make_ti(0x8000000000000000LL, 0));  // should abort
     55 //     test__subvti3(1, make_ti(0x8000000000000000LL, 0));  // should abort
     56 //     test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), -1);  // should abort
     57 //     test__subvti3(-2, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL));  // should abort
     58 
     59     if (test__subvti3(make_ti(0x8000000000000000LL, 0), -1))
     60         return 1;
     61     if (test__subvti3(make_ti(0x8000000000000000LL, 0), 0))
     62         return 1;
     63     if (test__subvti3(-1, make_ti(0x8000000000000000LL, 0)))
     64         return 1;
     65     if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 1))
     66         return 1;
     67     if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 0))
     68         return 1;
     69     if (test__subvti3(1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
     70         return 1;
     71     if (test__subvti3(0, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
     72         return 1;
     73     if (test__subvti3(-1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
     74         return 1;
     75 
     76 #else
     77     printf("skipped\n");
     78 #endif
     79     return 0;
     80 }
     81