Subversion Repositories openrisc_2011-10-31

/* US Software GOFAST floating point library support.

   Copyright (C) 1994, 1998, 1999, 2002, 2003, 2004, 2007

   Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

GCC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

/* The US Software GOFAST library requires special optabs support.

   This file is intended to be included by config/ARCH/ARCH.c.  It

   defines one function, gofast_maybe_init_libfuncs, which should be

   called from the TARGET_INIT_LIBFUNCS hook.  When tm.h has defined

   US_SOFTWARE_GOFAST, this function will adjust all the optabs and

   libfuncs appropriately.  Otherwise it will do nothing.  */

static void

gofast_maybe_init_libfuncs (void)

{

#ifdef US_SOFTWARE_GOFAST

  int mode;

  set_optab_libfunc (add_optab, SFmode, "fpadd");

  set_optab_libfunc (add_optab, DFmode, "dpadd");

  set_optab_libfunc (sub_optab, SFmode, "fpsub");

  set_optab_libfunc (sub_optab, DFmode, "dpsub");

  set_optab_libfunc (smul_optab, SFmode, "fpmul");

  set_optab_libfunc (smul_optab, DFmode, "dpmul");

  set_optab_libfunc (sdiv_optab, SFmode, "fpdiv");

  set_optab_libfunc (sdiv_optab, DFmode, "dpdiv");

  set_optab_libfunc (cmp_optab, SFmode, "fpcmp");

  set_optab_libfunc (cmp_optab, DFmode, "dpcmp");

  /* GOFAST does not provide libfuncs for negation, so we use the

     standard names.  */

  /* GCC does not use fpcmp/dpcmp for gt or ge because its own

     FP-emulation library returns +1 for both > and unord.  So we

     leave gt and ge unset, such that, instead of fpcmp(a,b) >[=], we

     generate fpcmp(b,a) <[=] 0, which is unambiguous.  For unord

     libfuncs, we use our own functions, since GOFAST doesn't supply

     them.  */

  set_optab_libfunc (eq_optab, SFmode, "fpcmp");

  set_optab_libfunc (ne_optab, SFmode, "fpcmp");

  set_optab_libfunc (gt_optab, SFmode, 0);

  set_optab_libfunc (ge_optab, SFmode, 0);

  set_optab_libfunc (lt_optab, SFmode, "fpcmp");

  set_optab_libfunc (le_optab, SFmode, "fpcmp");

  set_optab_libfunc (eq_optab, DFmode, "dpcmp");

  set_optab_libfunc (ne_optab, DFmode, "dpcmp");

  set_optab_libfunc (gt_optab, DFmode, 0);

  set_optab_libfunc (ge_optab, DFmode, 0);

  set_optab_libfunc (lt_optab, DFmode, "dpcmp");

  set_optab_libfunc (le_optab, DFmode, "dpcmp");

  set_conv_libfunc (sext_optab,   DFmode, SFmode, "fptodp");

  set_conv_libfunc (trunc_optab,  SFmode, DFmode, "dptofp");

  set_conv_libfunc (sfix_optab,   SImode, SFmode, "fptosi");

  set_conv_libfunc (sfix_optab,   SImode, DFmode, "dptoli");

  set_conv_libfunc (ufix_optab,   SImode, SFmode, "fptoui");

  set_conv_libfunc (ufix_optab,   SImode, DFmode, "dptoul");

  set_conv_libfunc (sfloat_optab, SFmode, SImode, "sitofp");

  set_conv_libfunc (sfloat_optab, DFmode, SImode, "litodp");

#endif

}