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

   1 /* Software floating-point emulation.
   2    Return 1 if (*a) == (*b)
   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
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Library General Public License as
  10    published by the Free Software Foundation; either version 2 of the
  11    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    Library General Public License for more details.
  17
  18    You should have received a copy of the GNU Library General Public
  19    License along with the GNU C Library; see the file COPYING.LIB.  If
  20    not, write to the Free Software Foundation, Inc.,
  21    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23 #include "soft-fp.h"
  24 #include "quad.h"
  25
  26 int _Qp_feq(const long double *a, const long double *b)
  27 {
  28   FP_DECL_EX;
  29   FP_DECL_Q(A); FP_DECL_Q(B);
  30   int r;
  31
  32   FP_INIT_ROUNDMODE;
  33   FP_UNPACK_RAW_QP(A, a);
  34   FP_UNPACK_RAW_QP(B, b);
  35   FP_CMP_EQ_Q(r, A, B);
  36   if (r && (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B)))
  37     FP_SET_EXCEPTION(FP_EX_INVALID);
  38
  39   QP_HANDLE_EXCEPTIONS(
  40         __asm (
  41 "       ldd [%0], %%f52\n"
  42 "       ldd [%0+8], %%f54\n"
  43 "       ldd [%1], %%f56\n"
  44 "       ldd [%1+8], %%f58\n"
  45 "       fcmpq %%fcc3, %%f52, %%f56\n"
  46 "       " : : "r" (a), "r" (b) : QP_CLOBBER_CC);
  47         _FPU_GETCW(_fcw);
  48         r = ((_fcw >> 36) & 3));
  49
  50   return !r;
  51 }