sysdeps/m68k/fpu/s_remquo.c

   1 /* Compute remainder and a congruent to the quotient.  m68k fpu version
   2    Copyright (C) 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <math.h>
  22
  23 #ifndef SUFF
  24 #define SUFF
  25 #endif
  26 #ifndef float_type
  27 #define float_type double
  28 #endif
  29
  30 #define CONCATX(a,b) __CONCAT(a,b)
  31 #define s(name) CONCATX(name,SUFF)
  32
  33 float_type
  34 s(__remquo) (float_type x, float_type y, int *quo)
  35 {
  36   float_type result;
  37   int cquo, fpsr;
  38
  39   __asm ("frem%.x %2,%0\n\tfmove%.l %/fpsr,%1"
  40          : "=f" (result), "=dm" (fpsr) : "f" (y), "0" (x));
  41   cquo = (fpsr >> 16) & 0x7f;
  42   if (fpsr & (1 << 23))
  43     cquo = -cquo;
  44   *quo = cquo;
  45   return result;
  46 }
  47 #define weak_aliasx(a,b) weak_alias(a,b)
  48 weak_aliasx (s(__remquo), s(remquo))