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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2023-08-25 13:30:58 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-02-01 09:31:33 -0300 |
| commit | ae4b8d6a0e0dc502e3d8307474a2e5691b7434da (patch) | |
| tree | 8e8d958ebb90b9edec3847a53364edb32a2314a3 /string/ffsll.c | |
| parent | 26d01172f5c3f3b912ecf21ebb911eb5351bba4d (diff) | |
| download | glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.zip glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.tar.gz glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.tar.bz2 | |
string: Use builtins for ffs and ffsll
It allows to remove a lot of arch-specific implementations.
Checked on x86_64, aarch64, powerpc64.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'string/ffsll.c')
| -rw-r--r-- | string/ffsll.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/string/ffsll.c b/string/ffsll.c index 7d16250..0ec39a0 100644 --- a/string/ffsll.c +++ b/string/ffsll.c @@ -18,20 +18,26 @@ #include <limits.h> #define ffsl __something_else #include <string.h> - #undef ffsll +#include <math-use-builtins.h> +#include <libc-diag.h> /* Find the first bit set in I. */ int -ffsll (long long int i) +__ffsll (long long int i) { +#if USE_FFSLL_BUILTIN + return __builtin_ffsll (i); +#else unsigned long long int x = i & -i; if (x <= 0xffffffff) return ffs (i); else return 32 + ffs (i >> 32); +#endif } +weak_alias (__ffsll, ffsll) #if ULONG_MAX != UINT_MAX #undef ffsl |