q_cmp.c 1.4 KB

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  1. /* Software floating-point emulation.
  2. Compare a and b, return float condition code.
  3. Copyright (C) 1997,1999 Free Software Foundation, Inc.
  4. This file is part of the GNU C Library.
  5. Contributed by Richard Henderson (rth@cygnus.com) and
  6. Jakub Jelinek (jj@ultra.linux.cz).
  7. The GNU C Library is free software; you can redistribute it and/or
  8. modify it under the terms of the GNU Lesser General Public
  9. License as published by the Free Software Foundation; either
  10. version 2.1 of the License, or (at your option) any later version.
  11. The GNU C Library is distributed in the hope that it will be useful,
  12. but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14. Lesser General Public License for more details.
  15. You should have received a copy of the GNU Lesser General Public
  16. License along with the GNU C Library; if not, write to the Free
  17. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18. 02111-1307 USA. */
  19. #include "soft-fp.h"
  20. #include "quad.h"
  21. int _Q_cmp(const long double a, const long double b)
  22. {
  23. FP_DECL_EX;
  24. FP_DECL_Q(A); FP_DECL_Q(B);
  25. int r;
  26. FP_UNPACK_RAW_Q(A, a);
  27. FP_UNPACK_RAW_Q(B, b);
  28. FP_CMP_Q(r, B, A, 3);
  29. if (r == -1) r = 2;
  30. if (r == 3 && (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B)))
  31. FP_SET_EXCEPTION(FP_EX_INVALID);
  32. FP_HANDLE_EXCEPTIONS;
  33. return r;
  34. }