| /* Determine the length of a string. For SPARC v9. |
| Copyright (C) 1998, 1999, 2003, 2010 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Jan Vondrak <jvon4518@ss1000.ms.mff.cuni.cz>, |
| Jakub Jelinek <jj@ultra.linux.cz>, and |
| David S. Miller <davem@davemloft.net>. |
| |
| 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <sysdep.h> |
| |
| .register %g2, #scratch |
| .register %g3, #scratch |
| |
| .text |
| .align 32 |
| ENTRY(strlen) |
| mov %o0, %o1 |
| andn %o0, 0x7, %o0 |
| |
| ldx [%o0], %o5 |
| and %o1, 0x7, %g1 |
| mov -1, %g5 |
| |
| sethi %hi(0x01010101), %o2 |
| sll %g1, 3, %g1 |
| |
| or %o2, %lo(0x01010101), %o2 |
| srlx %g5, %g1, %o3 |
| |
| sllx %o2, 32, %g1 |
| sethi %hi(0x0000ff00), %g5 |
| |
| orn %o5, %o3, %o5 |
| or %o2, %g1, %o2 |
| |
| sllx %o2, 7, %o3 |
| 10: add %o0, 8, %o0 |
| |
| andn %o3, %o5, %g1 |
| sub %o5, %o2, %g2 |
| |
| andcc %g1, %g2, %g0 |
| be,a,pt %xcc, 10b |
| ldx [%o0], %o5 |
| srlx %o5, 32, %g1 |
| |
| andn %o3, %g1, %o4 |
| sub %g1, %o2, %g2 |
| |
| add %o0, 4, %g3 |
| andcc %o4, %g2, %g0 |
| movne %icc, %g1, %o5 |
| |
| move %icc, %g3, %o0 |
| or %g5, %lo(0x0000ff00), %g5 |
| mov 3 - 8, %g2 |
| |
| andcc %o5, %g5, %g0 |
| srlx %o5, 16, %g1 |
| move %icc, 2 - 8, %g2 |
| |
| andcc %g1, 0xff, %g0 |
| srl %o5, 24, %o5 |
| move %icc, 1 - 8, %g2 |
| |
| movrz %o5, 0 - 8, %g2 |
| sub %o0, %o1, %o0 |
| |
| retl |
| add %o0, %g2, %o0 |
| END(strlen) |
| libc_hidden_builtin_def (strlen) |
