sysdeps/sparc/sparc64/qp_dtoq.c

   1 /* Software floating-point emulation.
   2    (*c) = (long double)(a)
   3    Copyright (C) 1997-2022 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  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
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include "soft-fp.h"
  21 #include "double.h"
  22 #include "quad.h"
  23
  24 void _Qp_dtoq(long double *c, const double a)
  25 {
  26   FP_DECL_EX;
  27   FP_DECL_D(A);
  28   FP_DECL_Q(C);
  29
  30   FP_INIT_ROUNDMODE;
  31   FP_UNPACK_RAW_D(A, a);
  32 #if _FP_W_TYPE_SIZE < 64
  33   FP_EXTEND(Q,D,4,2,C,A);
  34 #else
  35   FP_EXTEND(Q,D,2,1,C,A);
  36 #endif
  37   FP_PACK_RAW_QP(c, C);
  38   QP_HANDLE_EXCEPTIONS(__asm (
  39 "       fdtoq %1, %%f60\n"
  40 "       std %%f60, [%0]\n"
  41 "       std %%f62, [%0+8]\n"
  42 "       " : : "r" (c), "e" (a) : QP_CLOBBER));
  43 }