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uclibc-ng
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libc
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sysdeps
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linux
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powerpc
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bits
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fenvinline.h

fenvinline.h 2.4 KB
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  1. /* Inline floating-point environment handling functions for powerpc.
    2. 

  2.    Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
    3. 

  3.    This file is part of the GNU C Library.
    4. 

  4. 

  5.    The GNU C Library is free software; you can redistribute it and/or
    6. 

  6.    modify it under the terms of the GNU Lesser General Public
    7. 

  7.    License as published by the Free Software Foundation; either
    8. 

  8.    version 2.1 of the License, or (at your option) any later version.
    9. 

  9. 

  10.    The GNU C Library is distributed in the hope that it will be useful,
    11. 

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

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

  13.    Lesser General Public License for more details.
    14. 

  14. 

  15.    You should have received a copy of the GNU Lesser General Public
    16. 

  16.    License along with the GNU C Library; if not, write to the Free
    17. 

  17.    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    18. 

  18.    02111-1307 USA.  */
    19. 

  19. 

  20. #if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_MATH_INLINES
    21. 

  21. 

  22. /* Inline definition for fegetround.  */
    23. 

  23. # define fegetround() \
    24. 

  24.   (__extension__  ({ int __fegetround_result;				      \
    25. 

  25. 		     __asm__ ("mcrfs 7,7 ; mfcr %0"			      \
    26. 

  26. 			     : "=r"(__fegetround_result) : : "cr7");	      \
    27. 

  27. 		     __fegetround_result & 3; }))
    28. 

  28. 

  29. /* The weird 'i#*X' constraints on the following suppress a gcc
    30. 

  30.    warning when __excepts is not a constant.  Otherwise, they mean the
    31. 

  31.    same as just plain 'i'.  */
    32. 

  32. 

  33. /* Inline definition for feraiseexcept.  */
    34. 

  34. # define feraiseexcept(__excepts) \
    35. 

  35.   ((__builtin_constant_p (__excepts)					      \
    36. 

  36.     && ((__excepts) & ((__excepts)-1)) == 0				      \
    37. 

  37.     && (__excepts) != FE_INVALID)					      \
    38. 

  38.    ? ((__excepts) != 0							      \
    39. 

  39.       ? (__extension__ ({ __asm__ __volatile__				      \
    40. 

  40. 			  ("mtfsb1 %s0"					      \
    41. 

  41. 			   : : "i#*X"(__builtin_ffs (__excepts)));	      \
    42. 

  42. 			  0; }))					      \
    43. 

  43.       : 0)								      \
    44. 

  44.    : (feraiseexcept) (__excepts))
    45. 

  45. 

  46. /* Inline definition for feclearexcept.  */
    47. 

  47. # define feclearexcept(__excepts) \
    48. 

  48.   ((__builtin_constant_p (__excepts)					      \
    49. 

  49.     && ((__excepts) & ((__excepts)-1)) == 0				      \
    50. 

  50.     && (__excepts) != FE_INVALID)					      \
    51. 

  51.    ? ((__excepts) != 0							      \
    52. 

  52.       ? (__extension__ ({ __asm__ __volatile__				      \
    53. 

  53. 			  ("mtfsb0 %s0"					      \
    54. 

  54. 			   : : "i#*X"(__builtin_ffs (__excepts)));	      \
    55. 

  55. 			  0; }))					      \
    56. 

  56.       : 0)								      \
    57. 

  57.    : (feclearexcept) (__excepts))
    58. 

  58. 

  59. #endif /* __GNUC__ && !_SOFT_FLOAT */
    60.