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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 /sysdeps/m68k | |
| parent | 26d01172f5c3f3b912ecf21ebb911eb5351bba4d (diff) | |
| download | glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.tar.gz glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.tar.xz glibc-ae4b8d6a0e0dc502e3d8307474a2e5691b7434da.zip | |
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 'sysdeps/m68k')
| -rw-r--r-- | sysdeps/m68k/ffs.c | 46 | ||||
| -rw-r--r-- | sysdeps/m68k/math-use-builtins-ffs.h | 7 |
2 files changed, 7 insertions, 46 deletions
diff --git a/sysdeps/m68k/ffs.c b/sysdeps/m68k/ffs.c deleted file mode 100644 index 496ceb8941..0000000000 --- a/sysdeps/m68k/ffs.c +++ /dev/null @@ -1,46 +0,0 @@ -/* ffs -- find first set bit in a word, counted from least significant end. - For mc68020, mc68030, mc68040. - This file is part of the GNU C Library. - Copyright (C) 1991-2024 Free Software Foundation, Inc. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library. If not, see - <https://www.gnu.org/licenses/>. */ - -#define ffsl __something_else -#include <string.h> - -#undef ffs - -#if defined (__GNUC__) && defined (__mc68020__) - -int -__ffs (int x) -{ - int cnt; - - asm ("bfffo %1{#0:#0},%0" : "=d" (cnt) : "dm" (x & -x)); - - return 32 - cnt; -} -weak_alias (__ffs, ffs) -libc_hidden_def (__ffs) -libc_hidden_builtin_def (ffs) -#undef ffsl -weak_alias (__ffs, ffsl) - -#else - -#include <string/ffs.c> - -#endif diff --git a/sysdeps/m68k/math-use-builtins-ffs.h b/sysdeps/m68k/math-use-builtins-ffs.h new file mode 100644 index 0000000000..4e1d994453 --- /dev/null +++ b/sysdeps/m68k/math-use-builtins-ffs.h @@ -0,0 +1,7 @@ +#if defined __mc68020__ || defined __mc68030__ || defined __mc68040__ \ + || defined __mc68060__ +# define USE_FFS_BUILTIN 1 +#else +# define USE_FFS_BUILTIN 0 +#endif +#define USE_FFSLL_BUILTIN 0 |