libc/sysdeps/linux/sparc64/soft-fp/qp_cmpe.c

   1 /* Software floating-point emulation.
   2    Compare (*a) and (*b), return float condition code.
   3    Signal exception (unless masked) if unordered.
   4    Copyright (C) 1997-2017 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6    Contributed by Richard Henderson (rth@cygnus.com) and
   7                   Jakub Jelinek (jj@ultra.linux.cz).
   8
   9    The GNU C Library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Lesser General Public
  11    License as published by the Free Software Foundation; either
  12    version 2.1 of the License, or (at your option) any later version.
  13
  14    The GNU C Library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Lesser General Public License for more details.
  18
  19    You should have received a copy of the GNU Lesser General Public
  20    License along with the GNU C Library; if not, see
  21    <http://www.gnu.org/licenses/>.  */
  22
  23 #include "soft-fp.h"
  24 #include "quad.h"
  25
  26 int _Qp_cmpe(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_Q(r, B, A, 3, 2);
  36   if (r == -1) r = 2;
  37   QP_HANDLE_EXCEPTIONS(
  38         __asm (
  39 "       ldd [%0], %%f52\n"
  40 "       ldd [%0+8], %%f54\n"
  41 "       ldd [%1], %%f56\n"
  42 "       ldd [%1+8], %%f58\n"
  43 "       fcmpeq %%fcc3, %%f52, %%f56\n"
  44 "       " : : "r" (a), "r" (b) : QP_CLOBBER_CC);
  45         _FPU_GETCW(_fcw);
  46         r = ((_fcw >> 36) & 3));
  47
  48   return r;
  49 }