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bcopy.S

bcopy.S 2.3 KB
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  1. /*-
    2. 

  2.  * Copyright (c) 1997 The NetBSD Foundation, Inc.
    3. 

  3.  * All rights reserved.
    4. 

  4.  *
    5. 

  5.  * This code is derived from software contributed to The NetBSD Foundation
    6. 

  6.  * by Neil A. Carson and Mark Brinicombe
    7. 

  7.  *
    8. 

  8.  * Redistribution and use in source and binary forms, with or without
    9. 

  9.  * modification, are permitted provided that the following conditions
    10. 

  10.  * are met:
    11. 

  11.  * 1. Redistributions of source code must retain the above copyright
    12. 

  12.  *    notice, this list of conditions and the following disclaimer.
    13. 

  13.  * 2. Redistributions in binary form must reproduce the above copyright
    14. 

  14.  *    notice, this list of conditions and the following disclaimer in the
    15. 

  15.  *    documentation and/or other materials provided with the distribution.
    16. 

  16.  * 3. All advertising materials mentioning features or use of this software
    17. 

  17.  *    must display the following acknowledgement:
    18. 

  18.  *	This product includes software developed by the NetBSD
    19. 

  19.  *	Foundation, Inc. and its contributors.
    20. 

  20.  * 4. Neither the name of The NetBSD Foundation nor the names of its
    21. 

  21.  *    contributors may be used to endorse or promote products derived
    22. 

  22.  *    from this software without specific prior written permission.
    23. 

  23.  *
    24. 

  24.  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
    25. 

  25.  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
    26. 

  26.  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
    27. 

  27.  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
    28. 

  28.  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    29. 

  29.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    30. 

  30.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    31. 

  31.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    32. 

  32.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    33. 

  33.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    34. 

  34.  * POSSIBILITY OF SUCH DAMAGE.
    35. 

  35.  *
    36. 

  36.  * Adapted for uClibc from NetBSD bcopy.S,v 1.2 1997/10/09
    37. 

  37.  * by Erik Andersen <andersen@codepoet.org>
    38. 

  38.  */
    39. 

  39. 

  40. /* bcopy = memcpy/memmove with arguments reversed. */
    41. 

  41. 

  42. #include <features.h>
    43. 

  43. 

  44. .text
    45. 

  45. .global __bcopy
    46. 

  46. .hidden __bcopy
    47. 

  47. .type __bcopy,%function
    48. 

  48. .align 4
    49. 

  49. 

  50. __bcopy:
    51. 

  51. 	/* switch the source and destination registers */
    52. 

  52. 	eor     r0, r1, r0 
    53. 

  53. 	eor     r1, r0, r1 
    54. 

  54. 	eor     r0, r1, r0 
    55. 

  55. 	b	_memcpy (PLT)
    56. 

  56. 	
    57. 

  57. .size __bcopy,.-__bcopy
    58. 

  58. 

  59. strong_alias(__bcopy,bcopy)
    60.