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| // RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_ffsti2
// REQUIRES: int128
//===-- ffsti2_test.c - Test __ffsti2 -------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file tests __ffsti2 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
#ifdef CRT_HAS_128BIT
// Returns: the index of the least significant 1-bit in a, or
// the value zero if a is zero. The least significant bit is index one.
COMPILER_RT_ABI si_int __ffsti2(ti_int a);
int test__ffsti2(ti_int a, si_int expected)
{
si_int x = __ffsti2(a);
if (x != expected)
{
twords at;
at.all = a;
printf("error in __ffsti2(0x%llX%.16llX) = %d, expected %d\n",
at.s.high, at.s.low, x, expected);
}
return x != expected;
}
char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
#endif
int main()
{
#ifdef CRT_HAS_128BIT
if (test__ffsti2(0x00000000, 0))
return 1;
if (test__ffsti2(0x00000001, 1))
return 1;
if (test__ffsti2(0x00000002, 2))
return 1;
if (test__ffsti2(0x00000003, 1))
return 1;
if (test__ffsti2(0x00000004, 3))
return 1;
if (test__ffsti2(0x00000005, 1))
return 1;
if (test__ffsti2(0x0000000A, 2))
return 1;
if (test__ffsti2(0x10000000, 29))
return 1;
if (test__ffsti2(0x20000000, 30))
return 1;
if (test__ffsti2(0x60000000, 30))
return 1;
if (test__ffsti2(0x80000000uLL, 32))
return 1;
if (test__ffsti2(0x0000050000000000uLL, 41))
return 1;
if (test__ffsti2(0x0200080000000000uLL, 44))
return 1;
if (test__ffsti2(0x7200000000000000uLL, 58))
return 1;
if (test__ffsti2(0x8000000000000000uLL, 64))
return 1;
if (test__ffsti2(make_ti(0x8000000800000000uLL, 0), 100))
return 1;
if (test__ffsti2(make_ti(0x8000000000000000uLL, 0), 128))
return 1;
#else
printf("skipped\n");
#endif
return 0;
}
|