diff options
Diffstat (limited to 'test/builtins')
-rw-r--r-- | test/builtins/Unit/ffssi2_test.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/test/builtins/Unit/ffssi2_test.c b/test/builtins/Unit/ffssi2_test.c new file mode 100644 index 000000000..5d96b9636 --- /dev/null +++ b/test/builtins/Unit/ffssi2_test.c @@ -0,0 +1,57 @@ +// RUN: %clang_builtins %s %librt -o %t && %run %t +//===-- ffssi2_test.c - Test __ffssi2 -------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file tests __ffssi2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#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 si_int __ffssi2(si_int a); + +int test__ffssi2(si_int a, si_int expected) +{ + si_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; +} |