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udivsi3.S

udivsi3.S 2.1 KB
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  1. /* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
    2. 

  2.    2004, 2005
    3. 

  3.    Free Software Foundation, Inc.
    4. 

  4. 

  5. This file is free software; you can redistribute it and/or modify it
    6. 

  6. under the terms of the GNU General Public License as published by the
    7. 

  7. Free Software Foundation; either version 2, or (at your option) any
    8. 

  8. later version.
    9. 

  9. 

  10. In addition to the permissions in the GNU General Public License, the
    11. 

  11. Free Software Foundation gives you unlimited permission to link the
    12. 

  12. compiled version of this file into combinations with other programs,
    13. 

  13. and to distribute those combinations without any restriction coming
    14. 

  14. from the use of this file.  (The General Public License restrictions
    15. 

  15. do apply in other respects; for example, they cover modification of
    16. 

  16. the file, and distribution when not linked into a combine
    17. 

  17. executable.)
    18. 

  18. 

  19. This file is distributed in the hope that it will be useful, but
    20. 

  20. WITHOUT ANY WARRANTY; without even the implied warranty of
    21. 

  21. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    22. 

  22. General Public License for more details.
    23. 

  23. 

  24. You should have received a copy of the GNU General Public License
    25. 

  25. along with this program; see the file COPYING.  If not, write to
    26. 

  26. the Free Software Foundation, 51 Franklin Street, Fifth Floor,
    27. 

  27. Boston, MA 02110-1301, USA.  */
    28. 

  28. 

  29. !! libgcc routines for the Renesas / SuperH SH CPUs.
    30. 

  30. !! Contributed by Steve Chamberlain.
    31. 

  31. !! sac@cygnus.com
    32. 

  32. 

  33. 	.balign 4
    34. 

  34. 	.global	__udivsi3
    35. 

  35. 	.type	__udivsi3, @function
    36. 

  36. div8:
    37. 

  37. 	div1 r5,r4
    38. 

  38. div7:
    39. 

  39. 	div1 r5,r4; div1 r5,r4; div1 r5,r4
    40. 

  40. 	div1 r5,r4; div1 r5,r4; div1 r5,r4; rts; div1 r5,r4
    41. 

  41. 

  42. divx4:
    43. 

  43. 	div1 r5,r4; rotcl r0
    44. 

  44. 	div1 r5,r4; rotcl r0
    45. 

  45. 	div1 r5,r4; rotcl r0
    46. 

  46. 	rts; div1 r5,r4
    47. 

  47. 

  48. __udivsi3:
    49. 

  49. 	sts.l pr,@-r15
    50. 

  50. 	extu.w r5,r0
    51. 

  51. 	cmp/eq r5,r0
    52. 

  52. 	bf/s large_divisor
    53. 

  53. 	div0u
    54. 

  54. 	swap.w r4,r0
    55. 

  55. 	shlr16 r4
    56. 

  56. 	bsr div8
    57. 

  57. 	shll16 r5
    58. 

  58. 	bsr div7
    59. 

  59. 	div1 r5,r4
    60. 

  60. 	xtrct r4,r0
    61. 

  61. 	xtrct r0,r4
    62. 

  62. 	bsr div8
    63. 

  63. 	swap.w r4,r4
    64. 

  64. 	bsr div7
    65. 

  65. 	div1 r5,r4
    66. 

  66. 	lds.l @r15+,pr
    67. 

  67. 	xtrct r4,r0
    68. 

  68. 	swap.w r0,r0
    69. 

  69. 	rotcl r0
    70. 

  70. 	rts
    71. 

  71. 	shlr16 r5
    72. 

  72. 

  73. large_divisor:
    74. 

  74. 	mov #0,r0
    75. 

  75. 	xtrct r4,r0
    76. 

  76. 	xtrct r0,r4
    77. 

  77. 	bsr divx4
    78. 

  78. 	rotcl r0
    79. 

  79. 	bsr divx4
    80. 

  80. 	rotcl r0
    81. 

  81. 	bsr divx4
    82. 

  82. 	rotcl r0
    83. 

  83. 	bsr divx4
    84. 

  84. 	rotcl r0
    85. 

  85. 	lds.l @r15+,pr
    86. 

  86. 	rts
    87. 

  87. 	rotcl r0
    88.