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bfin
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bsdsetjmp.c

bsdsetjmp.c 2.0 KB
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  1. /* setjmp for the Blackfin project
    2. 

  2.  *
    3. 

  3.  * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
    4. 

  4.  * Copyright (C) 2003 Metrowerks
    5. 

  5.  * Based on code from Analog Devices.
    6. 

  6.  *
    7. 

  7.  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
    8. 

  8.  */
    9. 

  9. 

  10. #include <setjmp.h>
    11. 

  11. 

  12. #undef setjmp
    13. 

  13. 

  14. int setjmp(jmp_buf env)
    15. 

  15. {
    16. 

  16. 	__asm__ __volatile__(
    17. 

  17. 		"[--SP] = p0;\n\t"
    18. 

  18. 		"p0 = r0;\n\t"
    19. 

  19. 		"r0 = [SP++];\n\t"
    20. 

  20. 

  21. 		"[p0++] = r0;\n\t"       /* GP address registers */
    22. 

  22. 		"[p0++] = p1;\n\t"
    23. 

  23. 		"[p0++] = p2;\n\t"
    24. 

  24. 		"[p0++] = p3;\n\t"
    25. 

  25. 		"[p0++] = p4;\n\t"
    26. 

  26. 		"[p0++] = p5;\n\t"
    27. 

  27. 

  28. 		"[p0++] = FP;\n\t"       /* frame pointer */
    29. 

  29. 		"[p0++] = SP;\n\t"       /* stack pointer */
    30. 

  30. 

  31. 		"[p0++] = p0;\n\t"       /* data regs */
    32. 

  32. 		"[p0++] = r1;\n\t"
    33. 

  33. 		"[p0++] = r2;\n\t"
    34. 

  34. 		"[p0++] = r3;\n\t"
    35. 

  35. 		"[p0++] = r4;\n\t"
    36. 

  36. 		"[p0++] = r5;\n\t"
    37. 

  37. 		"[p0++] = r6;\n\t"
    38. 

  38. 		"[p0++] = r7;\n\t"
    39. 

  39. 

  40. 		"r0 = ASTAT;\n\t"
    41. 

  41. 		"[p0++] = r0;\n\t"
    42. 

  42. 

  43. 		"r0 = LC0;\n\t"          /* loop counters */
    44. 

  44. 		"[p0++] = r0;\n\t"
    45. 

  45. 		"r0 = LC1;\n\t"
    46. 

  46. 		"[p0++] = r0;\n\t"
    47. 

  47. 

  48. 		"r0 = A0.w;\n\t"
    49. 

  49. 		"[p0++] = r0;\n\t"
    50. 

  50. 		"r0.l = A0.x;\n\t"
    51. 

  51. 		"[p0++] = r0;\n\t"
    52. 

  52. 		"r0 = A1.w;\n\t"
    53. 

  53. 		"[p0++] = r0;\n\t"
    54. 

  54. 		"r0.l = A1.x;\n\t"
    55. 

  55. 		"[p0++] = r0;\n\t"
    56. 

  56. 

  57.                                  /* Dag regs */
    58. 

  58. 		"r0 = i0;\n\t"           /* index registers */
    59. 

  59. 		"[p0++] = r0;\n\t"
    60. 

  60. 		"r0 = i1;\n\t"
    61. 

  61. 		"[p0++] = r0;\n\t"
    62. 

  62. 		"r0 = i2;\n\t"
    63. 

  63. 		"[p0++] = r0;\n\t"
    64. 

  64. 		"r0 = i3;\n\t"
    65. 

  65. 		"[p0++] = r0;\n\t"
    66. 

  66. 

  67. 		"r0 = m0;\n\t"           /* modifier registers */
    68. 

  68. 		"[p0++] = r0;\n\t"
    69. 

  69. 		"r0 = m1;\n\t"
    70. 

  70. 		"[p0++] = r0;\n\t"
    71. 

  71. 		"r0 = m2;\n\t"
    72. 

  72. 		"[p0++] = r0;\n\t"
    73. 

  73. 		"r0 = m3;\n\t"
    74. 

  74. 		"[p0++] = r0;\n\t"
    75. 

  75. 

  76. 		"r0 = l0;\n\t"           /* length registers */
    77. 

  77. 		"[p0++] = r0;\n\t"
    78. 

  78. 		"r0 = l1;\n\t"
    79. 

  79. 		"[p0++] = r0;\n\t"
    80. 

  80. 		"r0 = l2;\n\t"
    81. 

  81. 		"[p0++] = r0;\n\t"
    82. 

  82. 		"r0 = l3;\n\t"
    83. 

  83. 		"[p0++] = r0;\n\t"
    84. 

  84. 

  85. 		"r0 = b0;\n\t"           /* base registers */
    86. 

  86. 		"[p0++] = r0;\n\t"
    87. 

  87. 		"r0 = b1;\n\t"
    88. 

  88. 		"[p0++] = r0;\n\t"
    89. 

  89. 		"r0 = b2;\n\t"
    90. 

  90. 		"[p0++] = r0;\n\t"
    91. 

  91. 		"r0 = b3;\n\t"
    92. 

  92. 		"[p0++] = r0;\n\t"
    93. 

  93. 

  94. 		"r0 = RETS;\n\t"         /* store return address */
    95. 

  95. 		"[p0++] = r0;\n\t"
    96. 

  96. 

  97. 		"r0 = 0;\n\t"
    98. 

  98. 		:
    99. 

  99. 		:
    100. 

  100. 	);
    101. 

  101. 

  102. 	return 0;
    103. 

  103. }
    104.