1  /* Software floating-point emulation: convert to fortran nearest.
       2     Copyright (C) 1997-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library.  If not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include "local-soft-fp.h"
      20  
      21  long
      22  _OtsNintXQ (long al, long ah, long _round)
      23  {
      24    FP_DECL_EX;
      25    FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C);
      26    unsigned long r;
      27    long s;
      28  
      29    /* If bit 3 is set, then integer overflow detection is requested.  */
      30    s = _round & 8 ? 1 : -1;
      31    _round = _round & 3;
      32  
      33    FP_INIT_ROUNDMODE;
      34    AXP_UNPACK_SEMIRAW_Q(A, a);
      35  
      36    /* Build 0.5 * sign(A) */
      37    B_e = _FP_EXPBIAS_Q;
      38    __FP_FRAC_SET_2 (B, 0, 0);
      39    B_s = A_s;
      40  
      41    FP_ADD_Q(C, A, B);
      42    _FP_FRAC_SRL_2(C, _FP_WORKBITS);
      43    _FP_FRAC_HIGH_RAW_Q(C) &= ~(_FP_W_TYPE)_FP_IMPLBIT_Q;
      44    FP_TO_INT_Q(r, C, 64, s);
      45    if (s > 0 && (_fex &= FP_EX_INVALID))
      46      FP_HANDLE_EXCEPTIONS;
      47  
      48    return r;
      49  }