sysdeps/alpha/ots_sub.c

   1 /* Software floating-point emulation: subtraction.
   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 void
  22 _OtsSubX(long al, long ah, long bl, long bh, long _round)
  23 {
  24   FP_DECL_EX;
  25   FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C);
  26   AXP_DECL_RETURN_Q(c);
  27
  28   FP_INIT_ROUNDMODE;
  29   AXP_UNPACK_SEMIRAW_Q(A, a);
  30   AXP_UNPACK_SEMIRAW_Q(B, b);
  31   FP_SUB_Q(C, A, B);
  32   AXP_PACK_SEMIRAW_Q(c, C);
  33   FP_HANDLE_EXCEPTIONS;
  34
  35   AXP_RETURN_Q(c);
  36 }