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>

1 files changed, 0 insertions, 69 deletions

diff --git a/sysdeps/s390/ffs.c b/sysdeps/s390/ffs.c
deleted file mode 100644
index 027e0ce6d4..0000000000
--- a/sysdeps/s390/ffs.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/* ffs -- find first set bit in a word, counted from least significant end.
-   S/390 version.
-   Copyright (C) 2000-2024 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   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/>.  */
-
-#include <limits.h>
-#define ffsl __something_else
-#include <string.h>
-
-#undef	ffs
-
-/* ffs: find first bit set. This is defined the same way as
-   the libc and compiler builtin ffs routines, therefore
-   differs in spirit from the above ffz (man ffs).  */
-
-int
-__ffs (int x)
-{
-	int r;
-
-	if (x == 0)
-	  return 0;
-	__asm__("    lr	  %%r1,%1\n"
-		"    sr	  %0,%0\n"
-		"    tml  %%r1,0xFFFF\n"
-		"    jnz  0f\n"
-		"    ahi  %0,16\n"
-		"    srl  %%r1,16\n"
-		"0:  tml  %%r1,0x00FF\n"
-		"    jnz  1f\n"
-		"    ahi  %0,8\n"
-		"    srl  %%r1,8\n"
-		"1:  tml  %%r1,0x000F\n"
-		"    jnz  2f\n"
-		"    ahi  %0,4\n"
-		"    srl  %%r1,4\n"
-		"2:  tml  %%r1,0x0003\n"
-		"    jnz  3f\n"
-		"    ahi  %0,2\n"
-		"    srl  %%r1,2\n"
-		"3:  tml  %%r1,0x0001\n"
-		"    jnz  4f\n"
-		"    ahi  %0,1\n"
-		"4:"
-		: "=&d" (r) : "d" (x) : "cc", "1" );
-	return r+1;
-}
-
-weak_alias (__ffs, ffs)
-libc_hidden_def (__ffs)
-libc_hidden_builtin_def (ffs)
-#if ULONG_MAX == UINT_MAX
-#undef ffsl
-weak_alias (__ffs, ffsl)
-#endif