ARM application development SDK for MNT ZZ9000 graphics and coprocessor card for classic Amiga computers.
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lcmp.S 1.2KB

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  1. /* Runtime ABI for the ARM Cortex-M0
  2. * lcmp.S: signed 64 bit comparison
  3. *
  4. * Copyright (c) 2017 Jörg Mische <bobbl@gmx.de>
  5. *
  6. * Permission to use, copy, modify, and/or distribute this software for any
  7. * purpose with or without fee is hereby granted, provided that the above
  8. * copyright notice and this permission notice appear in all copies.
  9. *
  10. * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11. * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12. * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13. * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14. * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15. * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  16. * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17. */
  18. .syntax unified
  19. .text
  20. .thumb
  21. .cpu cortex-m0
  22. @ int __aeabi_lcmp(long long r1:r0, long long r3:r2)
  23. @
  24. @ Compare signed integers and return -1 if lower, 0 if equal or +1 if greater
  25. @
  26. .thumb_func
  27. .global __aeabi_lcmp
  28. __aeabi_lcmp:
  29. cmp r1, r3
  30. blt 1f
  31. bgt 2f
  32. cmp r0, r2
  33. bhi 2f
  34. sbcs r0, r0, r0 @ 0 if cs and -1 if cc
  35. bx lr
  36. 1: movs r0, #1
  37. rsbs r0, r0, #0
  38. bx lr
  39. 2: movs r0, #1
  40. bx lr