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bcopy.s revision 1.1 
      1  1.1  is /*
      2  1.1  is  * Copyright (c) 1996 Ignatios Souvatzis
      3  1.1  is  * All rights reserved.
      4  1.1  is  *
      5  1.1  is  * Redistribution and use in source and binary forms, with or without
      6  1.1  is  * modification, are permitted provided that the following conditions
      7  1.1  is  * are met:
      8  1.1  is  * 1. Redistributions of source code must retain the above copyright
      9  1.1  is  *    notice, this list of conditions and the following disclaimer.
     10  1.1  is  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1  is  *    notice, this list of conditions and the following disclaimer in the
     12  1.1  is  *    documentation and/or other materials provided with the distribution.
     13  1.1  is  * 3. All advertising materials mentioning features or use of this software
     14  1.1  is  *    must display the following acknowledgement:
     15  1.1  is  *      This product includes software developed by Ignatios Souvatzis
     16  1.1  is  *      for the NetBSD project.
     17  1.1  is  * 4. The name of the author may not be used to endorse or promote products
     18  1.1  is  *    derived from this software without specific prior written permission
     19  1.1  is  *
     20  1.1  is  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  1.1  is  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  1.1  is  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  1.1  is  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  1.1  is  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  1.1  is  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  1.1  is  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  1.1  is  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  1.1  is  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  1.1  is  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  1.1  is  *
     31  1.1  is  * Small but possibly slow bcopy/memcpy combo.
     32  1.1  is  */
     33  1.1  is 	.text
     34  1.1  is 	.even
     35  1.1  is .globl _bcopy,_memcpy
     36  1.1  is 
     37  1.1  is _memcpy:
     38  1.1  is 	movel sp@(4),a0
     39  1.1  is 	movel sp@(8),a1
     40  1.1  is 	jra Lcpy
     41  1.1  is _bcopy:
     42  1.1  is 	movel sp@(4),a1
     43  1.1  is 	movel sp@(8),a0
     44  1.1  is Lcpy:
     45  1.1  is 	movel sp@(12),d0
     46  1.1  is 	jeq L1
     47  1.1  is 	cmpl a1,a0
     48  1.1  is 	jcc L3
     49  1.1  is L4:
     50  1.1  is 	moveb a1@+,a0@+
     51  1.1  is 	subql #1,d0
     52  1.1  is 	jne L4
     53  1.1  is 	rts
     54  1.1  is L3:
     55  1.1  is 	addl d0,a1
     56  1.1  is 	addl d0,a0
     57  1.1  is L9:
     58  1.1  is 	moveb a1@-,a0@-
     59  1.1  is 	subql #1,d0
     60  1.1  is 	jne L9
     61  1.1  is L1:
     62  1.1  is 	rts
     63