57 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_ffsdi23 4#include "int_lib.h"5#include <stdio.h>6 7// Returns: the index of the least significant 1-bit in a, or8// the value zero if a is zero. The least significant bit is index one.9 10COMPILER_RT_ABI int __ffsdi2(di_int a);11 12int test__ffsdi2(di_int a, int expected)13{14 int x = __ffsdi2(a);15 if (x != expected)16 printf("error in __ffsdi2(0x%llX) = %d, expected %d\n", a, x, expected);17 return x != expected;18}19 20char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};21 22int main()23{24 if (test__ffsdi2(0x00000000, 0))25 return 1;26 if (test__ffsdi2(0x00000001, 1))27 return 1;28 if (test__ffsdi2(0x00000002, 2))29 return 1;30 if (test__ffsdi2(0x00000003, 1))31 return 1;32 if (test__ffsdi2(0x00000004, 3))33 return 1;34 if (test__ffsdi2(0x00000005, 1))35 return 1;36 if (test__ffsdi2(0x0000000A, 2))37 return 1;38 if (test__ffsdi2(0x10000000, 29))39 return 1;40 if (test__ffsdi2(0x20000000, 30))41 return 1;42 if (test__ffsdi2(0x60000000, 30))43 return 1;44 if (test__ffsdi2(0x80000000uLL, 32))45 return 1;46 if (test__ffsdi2(0x0000050000000000uLL, 41))47 return 1;48 if (test__ffsdi2(0x0200080000000000uLL, 44))49 return 1;50 if (test__ffsdi2(0x7200000000000000uLL, 58))51 return 1;52 if (test__ffsdi2(0x8000000000000000uLL, 64))53 return 1;54 55 return 0;56}57