diff options
Diffstat (limited to 'ports/sysdeps/alpha/ffs.S')
-rw-r--r-- | ports/sysdeps/alpha/ffs.S | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/ports/sysdeps/alpha/ffs.S b/ports/sysdeps/alpha/ffs.S deleted file mode 100644 index 8d762efb36..0000000000 --- a/ports/sysdeps/alpha/ffs.S +++ /dev/null @@ -1,91 +0,0 @@ -/* Copyright (C) 1996-2014 Free Software Foundation, Inc. - Contributed by David Mosberger (davidm@cs.arizona.edu). - 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 - <http://www.gnu.org/licenses/>. */ - -/* Finds the first bit set in an integer. Optimized for the Alpha - architecture. */ - -#include <sysdep.h> - - .set noreorder - .set noat - - -ENTRY(__ffs) -#ifdef PROF - ldgp gp, 0(pv) - lda AT, _mcount - jsr AT, (AT), _mcount - .prologue 1 - zap $16, 0xF0, $16 - br $ffsl..ng -#else - .prologue 0 - zap $16, 0xF0, $16 - # FALLTHRU -#endif -END(__ffs) - - .align 4 -ENTRY(ffsl) -#ifdef PROF - ldgp gp, 0(pv) - lda AT, _mcount - jsr AT, (AT), _mcount - .prologue 1 -$ffsl..ng: -#else - .prologue 0 -#endif - not $16, $1 # e0 : - ldi $2, -1 # .. e1 : - cmpbge $1, $2, $3 # e0 : bit N == 1 for byte N == 0 - clr $0 # .. e1 : - addq $3, 1, $4 # e0 : - bic $4, $3, $3 # e1 : bit N == 1 for first byte N != 0 - and $3, 0xF0, $4 # e0 : - and $3, 0xCC, $5 # .. e1 : - and $3, 0xAA, $6 # e0 : - cmovne $4, 4, $0 # .. e1 : - cmovne $5, 2, $5 # e0 : - cmovne $6, 1, $6 # .. e1 : - addl $0, $5, $0 # e0 : - addl $0, $6, $0 # e1 : $0 == N - extbl $16, $0, $1 # e0 : $1 == byte N - ldi $2, 1 # .. e1 : - negq $1, $3 # e0 : - and $3, $1, $3 # e1 : bit N == least bit set of byte N - and $3, 0xF0, $4 # e0 : - and $3, 0xCC, $5 # .. e1 : - and $3, 0xAA, $6 # e0 : - cmovne $4, 5, $2 # .. e1 : - cmovne $5, 2, $5 # e0 : - cmovne $6, 1, $6 # .. e1 : - s8addl $0, $2, $0 # e0 : mult byte ofs by 8 and sum - addl $5, $6, $5 # .. e1 : - addl $0, $5, $0 # e0 : - nop # .. e1 : - cmoveq $16, 0, $0 # e0 : trap input == 0 case. - ret # .. e1 : 18 - -END(ffsl) - -weak_alias (__ffs, ffs) -libc_hidden_def (__ffs) -libc_hidden_builtin_def (ffs) -weak_extern (ffsl) -weak_alias (ffsl, ffsll) |