qp_dtoq.c 1.4 KB

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  1. /* Software floating-point emulation.
  2. (*c) = (long double)(a)
  3. Copyright (C) 1997-2017 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, see
  17. <http://www.gnu.org/licenses/>. */
  18. #include "soft-fp.h"
  19. #include "double.h"
  20. #include "quad.h"
  21. void _Qp_dtoq(long double *c, const double a)
  22. {
  23. FP_DECL_EX;
  24. FP_DECL_D(A);
  25. FP_DECL_Q(C);
  26. FP_INIT_ROUNDMODE;
  27. FP_UNPACK_RAW_D(A, a);
  28. #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
  29. FP_EXTEND(Q,D,4,2,C,A);
  30. #else
  31. FP_EXTEND(Q,D,2,1,C,A);
  32. #endif
  33. FP_PACK_RAW_QP(c, C);
  34. QP_HANDLE_EXCEPTIONS(__asm (
  35. " fdtoq %1, %%f60\n"
  36. " std %%f60, [%0]\n"
  37. " std %%f62, [%0+8]\n"
  38. " " : : "r" (c), "e" (a) : QP_CLOBBER));
  39. }