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author | Dimitry Andric <dim@FreeBSD.org> | 2017-04-16 16:02:53 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2017-04-16 16:02:53 +0000 |
commit | ab0bf875a5f328a6710f4e48258979ae1bc8da1c (patch) | |
tree | 66903cf9f73151825893dcc216b04c0930317a10 /lib/builtins/ffssi2.c | |
parent | abacad30a54c59ad437ccf54ec5236a8dd7f3ba9 (diff) | |
download | src-ab0bf875a5f328a6710f4e48258979ae1bc8da1c.tar.gz src-ab0bf875a5f328a6710f4e48258979ae1bc8da1c.zip |
Vendor import of compiler-rt trunk r300422:vendor/compiler-rt/compiler-rt-trunk-r300422
Notes
Notes:
svn path=/vendor/compiler-rt/dist/; revision=317021
svn path=/vendor/compiler-rt/compiler-rt-trunk-r300422/; revision=317022; tag=vendor/compiler-rt/compiler-rt-trunk-r300422
Diffstat (limited to 'lib/builtins/ffssi2.c')
-rw-r--r-- | lib/builtins/ffssi2.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/builtins/ffssi2.c b/lib/builtins/ffssi2.c new file mode 100644 index 000000000000..e5180eff5e08 --- /dev/null +++ b/lib/builtins/ffssi2.c @@ -0,0 +1,29 @@ +/* ===-- ffssi2.c - Implement __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 implements __ffssi2 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.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) +{ + if (a == 0) + { + return 0; + } + return __builtin_ctz(a) + 1; +} |