diff options
Diffstat (limited to 'old')
| -rw-r--r-- | old/strcmp.S | 50 | ||||
| -rw-r--r-- | old/strlen.S | 61 | ||||
| -rw-r--r-- | old/strncmp.S | 55 |
3 files changed, 166 insertions, 0 deletions
diff --git a/old/strcmp.S b/old/strcmp.S new file mode 100644 index 0000000..57a42a7 --- /dev/null +++ b/old/strcmp.S @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2002 ARM Ltd + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the company may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Adapted for uClibc from NetBSD strcmp.S, version 1.3 2003/04/05 + * by Erik Andersen <andersen@codepoet.org> + */ + + .text + .global strcmp; + .type strcmp,%function + .align 4; + +strcmp: +1: + ldrb r2, [r0], #1 + ldrb r3, [r1], #1 + cmp r2, #1 + cmpcs r2, r3 + beq 1b + sub r0, r2, r3 + //mov pc, lr + bx lr + +.weak strcoll; + strcoll = strcmp + diff --git a/old/strlen.S b/old/strlen.S new file mode 100644 index 0000000..1faf7e2 --- /dev/null +++ b/old/strlen.S @@ -0,0 +1,61 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Code contributed by Matthew Wilcox <willy@odie.barnet.ac.uk> + + 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. */ + +/* size_t strlen(const char *S) + * entry: r0 -> string + * exit: r0 = len + */ + + .text + .global strlen; + .type strlen,%function + .align 4; + +strlen: + bic r1, r0, $3 @ addr of word containing first byte + ldr r2, [r1], $4 @ get the first word + ands r3, r0, $3 @ how many bytes are duff? + rsb r0, r3, $0 @ get - that number into counter. + beq Laligned @ skip into main check routine if no + @ more + orr r2, r2, $0x000000ff @ set this byte to non-zero + subs r3, r3, $1 @ any more to do? + orrgt r2, r2, $0x0000ff00 @ if so, set this byte + subs r3, r3, $1 @ more? + orrgt r2, r2, $0x00ff0000 @ then set. +Laligned: @ here, we have a word in r2. Does it + tst r2, $0x000000ff @ contain any zeroes? + tstne r2, $0x0000ff00 @ + tstne r2, $0x00ff0000 @ + tstne r2, $0xff000000 @ + addne r0, r0, $4 @ if not, the string is 4 bytes longer + ldrne r2, [r1], $4 @ and we continue to the next word + bne Laligned @ +Llastword: @ drop through to here once we find a + tst r2, $0x000000ff @ + addne r0, r0, $1 @ + tstne r2, $0x0000ff00 @ and add up to 3 bytes on to it + addne r0, r0, $1 @ + tstne r2, $0x00ff0000 @ (if first three all non-zero, 4th + addne r0, r0, $1 @ must be zero) + //mov pc,lr + bx lr + +.size strlen,.-strlen; + diff --git a/old/strncmp.S b/old/strncmp.S new file mode 100644 index 0000000..ed7c495 --- /dev/null +++ b/old/strncmp.S @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2002 ARM Ltd + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the company may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Adapted for uClibc from NetBSD strncmp.S, version 1.2 2003/04/05 + * by Erik Andersen <andersen@codepoet.org> + */ + + .text + .global strncmp; + .type strncmp,%function + .align 4; + +strncmp: + /* if ((len - 1) < 0) return 0 */ + subs r2, r2, #1 + movmi r0, #0 + //movmi pc, lr + bxmi lr + + /* ip == last src address to compare */ + add ip, r0, r2 +1: + ldrb r2, [r0], #1 + ldrb r3, [r1], #1 + cmp ip, r0 + cmpcs r2, #1 + cmpcs r2, r3 + beq 1b + sub r0, r2, r3 + //mov pc, lr + bx lr |