diff options
Diffstat (limited to 'sysdeps/s390/ffs.c')
-rw-r--r-- | sysdeps/s390/ffs.c | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/sysdeps/s390/ffs.c b/sysdeps/s390/ffs.c deleted file mode 100644 index b6ed821e58..0000000000 --- a/sysdeps/s390/ffs.c +++ /dev/null @@ -1,68 +0,0 @@ -/* ffs -- find first set bit in a word, counted from least significant end. - This file is part of the GNU C Library. - Copyright (C) 2000 Free Software Foundation, Inc. - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#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 (x) - 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) -#undef ffsl -weak_alias (__ffs, ffsl) |