Inicio Explorar Ayuda
Registro Iniciar sesión
akucxy
/
gcc
1
0
Fork 0
Archivos Incidencias 0 Pull Requests 0 Wiki
Rama: master
Ramas Etiquetas
gcc
/
libgcc
/
config
/
vax
/
lib1funcs.S

lib1funcs.S 2.2 KB
Permalink Histórico Raw

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192 
  1. /* Copyright (C) 2009-2022 Free Software Foundation, Inc.
    2. 

  2.    This file is part of GCC.
    3. 

  3.    Contributed by Maciej W. Rozycki <macro@linux-mips.org>.
    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 3, or (at your option) any
    8. 

  8.    later version.
    9. 

  9. 

  10.    This file is distributed in the hope that it will be useful, but
    11. 

  11.    WITHOUT ANY WARRANTY; without even the implied warranty of
    12. 

  12.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13. 

  13.    General Public License for more details.
    14. 

  14. 

  15.    Under Section 7 of GPL version 3, you are granted additional
    16. 

  16.    permissions described in the GCC Runtime Library Exception, version
    17. 

  17.    3.1, as published by the Free Software Foundation.
    18. 

  18. 

  19.    You should have received a copy of the GNU General Public License and
    20. 

  20.    a copy of the GCC Runtime Library Exception along with this program;
    21. 

  21.    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    22. 

  22.    <http://www.gnu.org/licenses/>.  */
    23. 

  23. 

  24. #ifdef L_udivsi3
    25. 

  25. 	.text
    26. 

  26. 	.globl	__udivsi3
    27. 

  27. 	.type	__udivsi3, @function
    28. 

  28. __udivsi3:
    29. 

  29. 	.word	0
    30. 

  30. 	movl	8(%ap), %r1
    31. 

  31. 	blss	0f			/* Check bit #31 of divisor.  */
    32. 

  32. 	movl	4(%ap), %r2
    33. 

  33. 	blss	1f			/* Check bit #31 of dividend.  */
    34. 

  34. 

  35. 	/* Both zero, do a standard division.  */
    36. 

  36. 

  37. 	divl3	%r1, %r2, %r0
    38. 

  38. 	ret
    39. 

  39. 

  40. 	/* MSB of divisor set, only 1 or 0 may result.  */
    41. 

  41. 0:
    42. 

  42. 	decl	%r1
    43. 

  43. 	clrl	%r0
    44. 

  44. 	cmpl	%r1, 4(%ap)
    45. 

  45. 	adwc	$0, %r0
    46. 

  46. 	ret
    47. 

  47. 

  48. 	/* MSB of dividend set, do an extended division.  */
    49. 

  49. 1:
    50. 

  50. 	clrl	%r3
    51. 

  51. 	ediv	%r1, %r2, %r0, %r3
    52. 

  52. 	ret
    53. 

  53. 	.size	__udivsi3, . - __udivsi3
    54. 

  54. 	.previous
    55. 

  55. #endif
    56. 

  56. 

  57. #ifdef L_umodsi3
    58. 

  58. 	.text
    59. 

  59. 	.globl	__umodsi3
    60. 

  60. 	.type	__umodsi3, @function
    61. 

  61. __umodsi3:
    62. 

  62. 	.word	0
    63. 

  63. 	movl	8(%ap), %r1
    64. 

  64. 	blss	0f			/* Check bit #31 of divisor.  */
    65. 

  65. 	movl	4(%ap), %r2
    66. 

  66. 	blss	1f			/* Check bit #31 of dividend.  */
    67. 

  67. 

  68. 	/* Both zero, do a standard division.  */
    69. 

  69. 

  70. 	divl3	%r1, %r2, %r0
    71. 

  71. 	mull2	%r0, %r1
    72. 

  72. 	subl3	%r1, %r2, %r0
    73. 

  73. 	ret
    74. 

  74. 

  75. 	/* MSB of divisor set, subtract the divisor at most once.  */
    76. 

  76. 0:
    77. 

  77. 	movl	4(%ap), %r2
    78. 

  78. 	clrl	%r0
    79. 

  79. 	cmpl	%r2, %r1
    80. 

  80. 	sbwc	$0, %r0
    81. 

  81. 	bicl2	%r0, %r1
    82. 

  82. 	subl3	%r1, %r2, %r0
    83. 

  83. 	ret
    84. 

  84. 

  85. 	/* MSB of dividend set, do an extended division.  */
    86. 

  86. 1:
    87. 

  87. 	clrl	%r3
    88. 

  88. 	ediv	%r1, %r2, %r3, %r0
    89. 

  89. 	ret
    90. 

  90. 	.size	__umodsi3, . - __umodsi3
    91. 

  91. 	.previous
    92. 

  92. #endif
    93.