/uspace/lib/softfloat/neg.c

https://gitlab.com/vhelen/vhelen · C · 87 lines · 33 code · 19 blank · 35 comment · 0 complexity · 5a9ea8a53f29ec9febb8b3ac94c0a861 MD5 · raw file 

    

  1. /*
    2. 

  2.  * Copyright (c) 2005 Josef Cejka
    3. 

  3.  * Copyright (c) 2011 Petr Koupy
    4. 

  4.  * All rights reserved.
    5. 

  5.  *
    6. 

  6.  * Redistribution and use in source and binary forms, with or without
    7. 

  7.  * modification, are permitted provided that the following conditions
    8. 

  8.  * are met:
    9. 

  9.  *
    10. 

  10.  * - Redistributions of source code must retain the above copyright
    11. 

  11.  *   notice, this list of conditions and the following disclaimer.
    12. 

  12.  * - Redistributions in binary form must reproduce the above copyright
    13. 

  13.  *   notice, this list of conditions and the following disclaimer in the
    14. 

  14.  *   documentation and/or other materials provided with the distribution.
    15. 

  15.  * - The name of the author may not be used to endorse or promote products
    16. 

  16.  *   derived from this software without specific prior written permission.
    17. 

  17.  *
    18. 

  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    19. 

  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    20. 

  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    21. 

  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    22. 

  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    23. 

  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    24. 

  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    25. 

  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    26. 

  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    27. 

  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    28. 

  28.  */
    29. 

  29. 

  30. /** @addtogroup softfloat
    31. 

  31.  * @{
    32. 

  32.  */
    33. 

  33. /** @file Negation functions.
    34. 

  34.  */
    35. 

  35. 

  36. #include "neg.h"
    37. 

  37. #include "common.h"
    38. 

  38. 

  39. #ifdef float32_t
    40. 

  40. 

  41. float32_t __negsf2(float32_t a)
    42. 

  42. {
    43. 

  43. 	float32_u ua;
    44. 

  44. 	ua.val = a;
    45. 

  45. 	
    46. 

  46. 	ua.data.parts.sign = !ua.data.parts.sign;
    47. 

  47. 	
    48. 

  48. 	return ua.val;
    49. 

  49. }
    50. 

  50. 

  51. #endif
    52. 

  52. 

  53. #ifdef float64_t
    54. 

  54. 

  55. float64_t __negdf2(float64_t a)
    56. 

  56. {
    57. 

  57. 	float64_u ua;
    58. 

  58. 	ua.val = a;
    59. 

  59. 	
    60. 

  60. 	ua.data.parts.sign = !ua.data.parts.sign;
    61. 

  61. 	
    62. 

  62. 	return ua.val;
    63. 

  63. }
    64. 

  64. 

  65. #endif
    66. 

  66. 

  67. #ifdef float128_t
    68. 

  68. 

  69. float128_t __negtf2(float128_t a)
    70. 

  70. {
    71. 

  71. 	float128_u ua;
    72. 

  72. 	ua.val = a;
    73. 

  73. 	
    74. 

  74. 	ua.data.parts.sign = !ua.data.parts.sign;
    75. 

  75. 	
    76. 

  76. 	return ua.val;
    77. 

  77. }
    78. 

  78. 

  79. void _Qp_neg(float128_t *c, float128_t *a)
    80. 

  80. {
    81. 

  81. 	*c = __negtf2(*a);
    82. 

  82. }
    83. 

  83. 

  84. #endif
    85. 

  85. 

  86. /** @}
    87. 

  87.  */
    88.