diff options
Diffstat (limited to 'sys/lib/libkern/arch/m68k/scanc.S')
| -rw-r--r-- | sys/lib/libkern/arch/m68k/scanc.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sys/lib/libkern/arch/m68k/scanc.S b/sys/lib/libkern/arch/m68k/scanc.S new file mode 100644 index 00000000000..358793e7c6b --- /dev/null +++ b/sys/lib/libkern/arch/m68k/scanc.S @@ -0,0 +1,67 @@ +/* $NetBSD: scanc.S,v 1.2 1994/10/26 06:39:31 cgd Exp $ */ + +/* + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1980, 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + * + * from: Utah Hdr: locore.s 1.58 91/04/22 + * @(#)locore.s 7.11 (Berkeley) 5/9/91 + */ + +#include "DEFS.h" + +/* + * Emulate fancy VAX string operations: + * scanc(count, startc, table, mask) + */ +ENTRY(scanc) + movl sp@(4),d0 | get length + jeq Lscdone | nothing to do, return + movl sp@(8),a0 | start of scan + movl sp@(12),a1 | table to compare with + movb sp@(19),d1 | and mask to use + movw d2,sp@- | need a scratch register + clrw d2 | clear it out + subqw #1,d0 | adjust for dbra +Lscloop: + movb a0@+,d2 | get character + movb a1@(0,d2:w),d2 | get table entry + andb d1,d2 | mask it + dbne d0,Lscloop | keep going til no more or non-zero + addqw #1,d0 | overshot by one + movw sp@+,d2 | restore scratch +Lscdone: + rts |