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

// RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_subvti3
// REQUIRES: int128

#include "int_lib.h"
#include <stdio.h>
#include <stdlib.h>

#ifdef CRT_HAS_128BIT

// Returns: a - b

// Effects: aborts if a - b overflows

COMPILER_RT_ABI ti_int __subvti3(ti_int a, ti_int b);

int test__subvti3(ti_int a, ti_int b)
{
    ti_int x = __subvti3(a, b);
    ti_int expected = a - b;
    if (x != expected)
    {
        twords at;
        at.all = a;
        twords bt;
        bt.all = b;
        twords xt;
        xt.all = x;
        twords expectedt;
        expectedt.all = expected;
        printf("error in test__subvsi3(0x%.16llX%.16llX, 0x%.16llX%.16llX) = "
               "0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
               at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
               expectedt.s.high, expectedt.s.low);
    }
    return x != expected;
}

#endif

int main()
{
#ifdef CRT_HAS_128BIT
//     test__subvti3(make_ti(0x8000000000000000LL, 0), 1);  // should abort
//     test__subvti3(0, make_ti(0x8000000000000000LL, 0));  // should abort
//     test__subvti3(1, make_ti(0x8000000000000000LL, 0));  // should abort
//     test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), -1);  // should abort
//     test__subvti3(-2, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL));  // should abort

    if (test__subvti3(make_ti(0x8000000000000000LL, 0), -1))
        return 1;
    if (test__subvti3(make_ti(0x8000000000000000LL, 0), 0))
        return 1;
    if (test__subvti3(-1, make_ti(0x8000000000000000LL, 0)))
        return 1;
    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 1))
        return 1;
    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 0))
        return 1;
    if (test__subvti3(1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
        return 1;
    if (test__subvti3(0, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
        return 1;
    if (test__subvti3(-1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
        return 1;

#else
    printf("skipped\n");
#endif
    return 0;
}