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author | Anton Samokhvalov <pg83@yandex.ru> | 2022-02-10 16:45:15 +0300 |
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committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:45:15 +0300 |
commit | 72cb13b4aff9bc9cf22e49251bc8fd143f82538f (patch) | |
tree | da2c34829458c7d4e74bdfbdf85dff449e9e7fb8 /contrib/libs/cxxsupp/builtins/ffsdi2.c | |
parent | 778e51ba091dc39e7b7fcab2b9cf4dbedfb6f2b5 (diff) | |
download | ydb-72cb13b4aff9bc9cf22e49251bc8fd143f82538f.tar.gz |
Restoring authorship annotation for Anton Samokhvalov <pg83@yandex.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/ffsdi2.c')
-rw-r--r-- | contrib/libs/cxxsupp/builtins/ffsdi2.c | 66 |
1 files changed, 33 insertions, 33 deletions
diff --git a/contrib/libs/cxxsupp/builtins/ffsdi2.c b/contrib/libs/cxxsupp/builtins/ffsdi2.c index a5ac9900ff..a1473d4a3c 100644 --- a/contrib/libs/cxxsupp/builtins/ffsdi2.c +++ b/contrib/libs/cxxsupp/builtins/ffsdi2.c @@ -1,33 +1,33 @@ -/* ===-- ffsdi2.c - Implement __ffsdi2 -------------------------------------=== - * - * 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 __ffsdi2 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 -__ffsdi2(di_int a) -{ - dwords x; - x.all = a; - if (x.s.low == 0) - { - if (x.s.high == 0) - return 0; - return __builtin_ctz(x.s.high) + (1 + sizeof(si_int) * CHAR_BIT); - } - return __builtin_ctz(x.s.low) + 1; -} +/* ===-- ffsdi2.c - Implement __ffsdi2 -------------------------------------=== + * + * 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 __ffsdi2 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 +__ffsdi2(di_int a) +{ + dwords x; + x.all = a; + if (x.s.low == 0) + { + if (x.s.high == 0) + return 0; + return __builtin_ctz(x.s.high) + (1 + sizeof(si_int) * CHAR_BIT); + } + return __builtin_ctz(x.s.low) + 1; +} |