[src/trunk]: src/common/lib/libc/arch/arm/string Add simple/small versions of...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/65fa536312aa
branches:  trunk
changeset: 784016:65fa536312aa
user:      matt <matt%NetBSD.org@localhost>
date:      Tue Jan 15 02:03:30 2013 +0000

description:
Add simple/small versions of strchr/strrchr for ARM.

diffstat:

 common/lib/libc/arch/arm/string/strchr_naive.S  |  44 +++++++++++++++++++++++++
 common/lib/libc/arch/arm/string/strrchr_naive.S |  44 +++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 0 deletions(-)

diffs (96 lines):

diff -r 46d669f66037 -r 65fa536312aa common/lib/libc/arch/arm/string/strchr_naive.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/common/lib/libc/arch/arm/string/strchr_naive.S    Tue Jan 15 02:03:30 2013 +0000
@@ -0,0 +1,44 @@
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 THE FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+#include <machine/asm.h>
+
+RCSID("$NetBSD: strchr_naive.S,v 1.1 2013/01/15 02:03:30 matt Exp $")
+
+/* LINTSTUB: char * strchr(const char *, int) */
+ENTRY(strchr)
+       mov     ip, r0          /* using r0 as return value */
+       mov     r0, #0          /* default to no match */
+       and     r1, r1, #0xff   /* restrict to a byte value */
+1:     ldrb    r3, [ip], #1    /* read a byte */
+       cmp     r3, r1          /* does it match? */
+       subeq   r0, ip, #1      /*   yes, set return value to point to it */
+       teqne   r3, #0          /*   no, was it a NUL? */
+       bne     1b              /*     no, get next byte */
+       RET
+END(strchr)
diff -r 46d669f66037 -r 65fa536312aa common/lib/libc/arch/arm/string/strrchr_naive.S
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/common/lib/libc/arch/arm/string/strrchr_naive.S   Tue Jan 15 02:03:30 2013 +0000
@@ -0,0 +1,44 @@
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 THE FOUNDATION OR CONTRIBUTORS
+ * 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.
+ */
+#include <machine/asm.h>
+
+RCSID("$NetBSD: strrchr_naive.S,v 1.1 2013/01/15 02:03:30 matt Exp $")
+
+/* LINTSTUB: char * strrchr(const char *, int) */
+ENTRY(strrchr)
+       mov     ip, r0          /* using r0 as return value */
+       mov     r0, #0          /* default to no match */
+       and     r1, r1, #0xff   /* restrict to a byte value */
+1:     ldrb    r3, [ip], #1    /* read a byte */
+       cmp     r3, r1          /* does it match? */
+       subeq   r0, ip, #1      /*   yes, set return value to point to it */
+       teq     r3, #0          /* was it a NUL? */
+       bne     1b              /*   no, get next byte */
+       RET
+END(strrchr)