insl_sw.S 1.1 KB

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  1. /* insl_sw.S: input array of 4b words from device port with byte swapping
  2. *
  3. * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
  4. * Written by David Howells (dhowells@redhat.com)
  5. *
  6. * This program is free software; you can redistribute it and/or
  7. * modify it under the terms of the GNU General Public License
  8. * as published by the Free Software Foundation; either version
  9. * 2 of the License, or (at your option) any later version.
  10. */
  11. .text
  12. .p2align 4
  13. ###############################################################################
  14. #
  15. # void __insl_sw(unsigned int port, void *buf, int n)
  16. #
  17. ###############################################################################
  18. .globl __insl_sw
  19. .type __insl_sw,@function
  20. __insl_sw:
  21. subi.p gr9,#1,gr9
  22. setlos #1,gr4
  23. 0:
  24. ldi.p @(gr8,#0),gr5 ; get 0xAABBCCDD
  25. subicc gr10,#1,gr10,icc0
  26. stbu.p gr5,@(gr9,gr4) ; write 0xDD
  27. srli gr5,#8,gr5
  28. stbu.p gr5,@(gr9,gr4) ; write 0xCC
  29. srli gr5,#8,gr5
  30. stbu.p gr5,@(gr9,gr4) ; write 0xBB
  31. srli gr5,#8,gr5
  32. stbu.p gr5,@(gr9,gr4) ; write 0xAA
  33. bhi icc0,#2,0b
  34. bralr
  35. .size __insl_sw, .-__insl_sw