bcopy.S 2.5 KB

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  1. /*-
  2. * Copyright (c) 1997 The NetBSD Foundation, Inc.
  3. * All rights reserved.
  4. *
  5. * This code is derived from software contributed to The NetBSD Foundation
  6. * by Neil A. Carson and Mark Brinicombe
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions
  10. * are met:
  11. * 1. Redistributions of source code must retain the above copyright
  12. * notice, this list of conditions and the following disclaimer.
  13. * 2. Redistributions in binary form must reproduce the above copyright
  14. * notice, this list of conditions and the following disclaimer in the
  15. * documentation and/or other materials provided with the distribution.
  16. * 3. All advertising materials mentioning features or use of this software
  17. * must display the following acknowledgement:
  18. * This product includes software developed by the NetBSD
  19. * Foundation, Inc. and its contributors.
  20. * 4. Neither the name of The NetBSD Foundation nor the names of its
  21. * contributors may be used to endorse or promote products derived
  22. * from this software without specific prior written permission.
  23. *
  24. * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  25. * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  26. * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  28. * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31. * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32. * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34. * POSSIBILITY OF SUCH DAMAGE.
  35. *
  36. * Adapted for uClibc from NetBSD bcopy.S,v 1.2 1997/10/09
  37. * by Erik Andersen <andersen@codepoet.org>
  38. */
  39. /* bcopy = memcpy/memmove with arguments reversed. */
  40. #include <features.h>
  41. #include <bits/arm_asm.h>
  42. #ifdef __UCLIBC_SUSV3_LEGACY__
  43. .text
  44. .global bcopy
  45. .type bcopy,%function
  46. .align 4
  47. #if defined(__thumb__) && !defined(__thumb2__)
  48. .thumb_func
  49. bcopy:
  50. push {r2, lr}
  51. mov ip, r0
  52. mov r0, r1
  53. mov r1, ip
  54. bl _memcpy
  55. POP_RET
  56. #else
  57. bcopy:
  58. /* switch the source and destination registers */
  59. eor r0, r1, r0
  60. eor r1, r0, r1
  61. eor r0, r1, r0
  62. b _memcpy /* (PLT) */
  63. #endif
  64. .size bcopy,.-bcopy
  65. #endif