// RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_ffssi2
#include "int_lib.h"
#include <stdio.h>
// 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 int __ffssi2(si_int a);
int test__ffssi2(si_int a, int expected)
{
int x = __ffssi2(a);
if (x != expected)
printf("error in __ffssi2(0x%X) = %d, expected %d\n", a, x, expected);
return x != expected;
}
int main()
{
if (test__ffssi2(0x00000000, 0))
return 1;
if (test__ffssi2(0x00000001, 1))
return 1;
if (test__ffssi2(0x00000002, 2))
return 1;
if (test__ffssi2(0x00000003, 1))
return 1;
if (test__ffssi2(0x00000004, 3))
return 1;
if (test__ffssi2(0x00000005, 1))
return 1;
if (test__ffssi2(0x0000000A, 2))
return 1;
if (test__ffssi2(0x10000000, 29))
return 1;
if (test__ffssi2(0x20000000, 30))
return 1;
if (test__ffssi2(0x60000000, 30))
return 1;
if (test__ffssi2(0x80000000u, 32))
return 1;
return 0;
}