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

   1 /* Software floating-point emulation.
   2    (*c) = sqrtl(*a)
   3    Copyright (C) 1997-2014 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 "quad.h"
  24
  25 void _Qp_sqrt(long double *c, const long double *a)
  26 {
  27   FP_DECL_EX;
  28   FP_DECL_Q(A); FP_DECL_Q(C);
  29
  30   FP_INIT_ROUNDMODE;
  31   FP_UNPACK_QP(A, a);
  32   FP_SQRT_Q(C, A);
  33   FP_PACK_QP(c, C);
  34   QP_HANDLE_EXCEPTIONS(__asm (
  35 "       ldd [%1], %%f52\n"
  36 "       ldd [%1+8], %%f54\n"
  37 "       fsqrtq %%f52, %%f60\n"
  38 "       std %%f60, [%0]\n"
  39 "       std %%f62, [%0+8]\n"
  40 "       " : : "r" (c), "r" (a) : QP_CLOBBER));
  41 }