1 /* Optimized strcmp implementation for PowerPC476.
2 Copyright (C) 2010 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
26 r0:temp return equality
27 r3:source1 address, return equality
30 Implementation description
31 Check 2 words from src1 and src2. If unequal jump to end and
32 return src1 > src2 or src1 < src2.
33 If null check bytes before null and then jump to end and
34 return src1 > src2, src1 < src2 or src1 = src2.
35 If src1 = src2 and no null, repeat. */
37 EALIGN (BP_SYM(strcmp),5,0)
100 rlwinm r12,r12,3,0,31
110 rlwinm r12,r12,3,0,31
135 END (BP_SYM (strcmp))
136 libc_hidden_builtin_def (strcmp)