1  /* Software floating-point emulation.
       2     Compare (*a) and (*b), return float condition code.
       3     Signal exception (unless masked) if unordered.
       4     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       5     This file is part of the GNU C Library.
       6  
       7     The GNU C Library is free software; you can redistribute it and/or
       8     modify it under the terms of the GNU Lesser General Public
       9     License as published by the Free Software Foundation; either
      10     version 2.1 of the License, or (at your option) any later version.
      11  
      12     The GNU C Library is distributed in the hope that it will be useful,
      13     but WITHOUT ANY WARRANTY; without even the implied warranty of
      14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15     Lesser General Public License for more details.
      16  
      17     You should have received a copy of the GNU Lesser General Public
      18     License along with the GNU C Library; if not, see
      19     <https://www.gnu.org/licenses/>.  */
      20  
      21  #include "soft-fp.h"
      22  #include "quad.h"
      23  
      24  int _Qp_cmpe(const long double *a, const long double *b)
      25  {
      26    FP_DECL_EX;
      27    FP_DECL_Q(A); FP_DECL_Q(B);
      28    int r;
      29  
      30    FP_INIT_ROUNDMODE;
      31    FP_UNPACK_RAW_QP(A, a);
      32    FP_UNPACK_RAW_QP(B, b);
      33    FP_CMP_Q(r, B, A, 3, 2);
      34    if (r == -1) r = 2;
      35    QP_HANDLE_EXCEPTIONS(
      36  	__asm (
      37  "	ldd [%0], %%f52\n"
      38  "	ldd [%0+8], %%f54\n"
      39  "	ldd [%1], %%f56\n"
      40  "	ldd [%1+8], %%f58\n"
      41  "	fcmpeq %%fcc3, %%f52, %%f56\n"
      42  "	" : : "r" (a), "r" (b) : QP_CLOBBER_CC);
      43  	_FPU_GETCW(_fcw);
      44  	r = ((_fcw >> 36) & 3));
      45  
      46    return r;
      47  }