diff options
Diffstat (limited to 'test/Unit/ffsti2_test.c')
-rw-r--r-- | test/Unit/ffsti2_test.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/test/Unit/ffsti2_test.c b/test/Unit/ffsti2_test.c new file mode 100644 index 000000000000..19da16a436e3 --- /dev/null +++ b/test/Unit/ffsti2_test.c @@ -0,0 +1,81 @@ +//===-- ffsti2_test.c - Test __ffsti2 -------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __ffsti2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#if __x86_64 + +#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. + +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() +{ +#if __x86_64 + 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; + +#endif + return 0; +} |