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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /lib/clz_ctz.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/clz_ctz.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/lib/clz_ctz.c b/lib/clz_ctz.c new file mode 100644 index 0000000000..fb8c0c5c2b --- /dev/null +++ b/lib/clz_ctz.c @@ -0,0 +1,43 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * lib/clz_ctz.c + * + * Copyright (C) 2013 Chanho Min <chanho.min@lge.com> + * + * The functions in this file aren't called directly, but are required by + * GCC builtins such as __builtin_ctz, and therefore they can't be removed + * despite appearing unreferenced in kernel source. + * + * __c[lt]z[sd]i2 can be overridden by linking arch-specific versions. + */ + +#include <linux/export.h> +#include <linux/kernel.h> + +int __weak __ctzsi2(int val); +int __weak __ctzsi2(int val) +{ + return __ffs(val); +} +EXPORT_SYMBOL(__ctzsi2); + +int __weak __clzsi2(int val); +int __weak __clzsi2(int val) +{ + return 32 - fls(val); +} +EXPORT_SYMBOL(__clzsi2); + +int __weak __clzdi2(u64 val); +int __weak __clzdi2(u64 val) +{ + return 64 - fls64(val); +} +EXPORT_SYMBOL(__clzdi2); + +int __weak __ctzdi2(u64 val); +int __weak __ctzdi2(u64 val) +{ + return __ffs64(val); +} +EXPORT_SYMBOL(__ctzdi2); |