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htons.S

htons.S 2.0 KB
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  1. /*	$OpenBSD: htons.S,v 1.4 2009/12/12 20:03:54 miod Exp $	*/
    2. 

  2. /*-
    3. 

  3.  * Copyright (c) 1991, 1993
    4. 

  4.  *      The Regents of the University of California.  All rights reserved.
    5. 

  5.  *
    6. 

  6.  * This code is derived from software contributed to Berkeley by
    7. 

  7.  * Ralph Campbell.
    8. 

  8.  *
    9. 

  9.  * Redistribution and use in source and binary forms, with or without
    10. 

  10.  * modification, are permitted provided that the following conditions
    11. 

  11.  * are met:
    12. 

  12.  * 1. Redistributions of source code must retain the above copyright
    13. 

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

  14.  * 2. Redistributions in binary form must reproduce the above copyright
    15. 

  15.  *    notice, this list of conditions and the following disclaimer in the
    16. 

  16.  *    documentation and/or other materials provided with the distribution.
    17. 

  17.  * 3. Neither the name of the University nor the names of its contributors
    18. 

  18.  *    may be used to endorse or promote products derived from this software
    19. 

  19.  *    without specific prior written permission.
    20. 

  20.  *
    21. 

  21.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    22. 

  22.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    23. 

  23.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    24. 

  24.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    25. 

  25.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    26. 

  26.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    27. 

  27.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    28. 

  28.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    29. 

  29.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    30. 

  30.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    31. 

  31.  * SUCH DAMAGE.
    32. 

  32.  */
    33. 

  33. 

  34. #include "DEFS.h"
    35. 

  35. 

  36. 

  37. /*
    38. 

  38.  * netorder = htons(hostorder)
    39. 

  39.  * hostorder = ntohs(netorder)
    40. 

  40.  */
    41. 

  41. LEAF(htons, 0)
    42. 

  42. ALEAF(ntohs)
    43. 

  43. #ifdef __MIPSEL__
    44. 

  44. 	.set	noreorder
    45. 

  45. 	srl	v0, a0, 8
    46. 

  46. 	and	v0, v0, 0xff
    47. 

  47. 	sll	v1, a0, 8
    48. 

  48. 	and	v1, v1, 0xff00
    49. 

  49. 	j	ra
    50. 

  50. 	or	v0, v0, v1
    51. 

  51. #else
    52. 

  52. 	j	ra
    53. 

  53. 	move	v0, a0
    54. 

  54. #endif
    55. 

  55. END(htons)
    56. 

  56.