sysdeps/sparc/sparc64/soft-fp/qp_dtoq.c

   1 /* Software floating-point emulation.
   2    (*c) = (long double)(a)
   3    Copyright (C) 1997,1999,2006 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
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 2.1 of the License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Lesser General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public
  19    License along with the GNU C Library; if not, see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 #include "soft-fp.h"
  23 #include "double.h"
  24 #include "quad.h"
  25
  26 void _Qp_dtoq(long double *c, const double a)
  27 {
  28   FP_DECL_EX;
  29   FP_DECL_D(A);
  30   FP_DECL_Q(C);
  31
  32   FP_INIT_ROUNDMODE;
  33   FP_UNPACK_RAW_D(A, a);
  34 #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
  35   FP_EXTEND(Q,D,4,2,C,A);
  36 #else
  37   FP_EXTEND(Q,D,2,1,C,A);
  38 #endif
  39   FP_PACK_RAW_QP(c, C);
  40   QP_HANDLE_EXCEPTIONS(__asm (
  41 "       fdtoq %1, %%f60\n"
  42 "       std %%f60, [%0]\n"
  43 "       std %%f62, [%0+8]\n"
  44 "       " : : "r" (c), "e" (a) : QP_CLOBBER));
  45 }