2018-01-03 11:03:58 +01:00
|
|
|
# Copyright (C) 2014-2018 Free Software Foundation, Inc.
|
Optimize powerpc*-*-linux* e500 hardfp/soft-fp use.
Continuing the cleanups of libgcc soft-fp configuration for
powerpc*-*-linux* in preparation for implementing
TARGET_ATOMIC_ASSIGN_EXPAND_FENV for soft-float and e500, this patch
optimizes the choice of which functions to build for the e500 cases.
For e500v2, use of hardfp is generally right, except that calls to
__unordsf2 and __unorddf2 are actually generated by GCC from
__builtin_isunordered and so they need to be implemented with soft-fp
to avoid recursively calling themselves. For e500v1, hardfp is right
for SFmode (except for __unordsf2) but soft-fp for DFmode (and when
using soft-fp, as usual it's best for the conversions between DFmode
and integers all to come directly from soft-fp rather than some coming
from libgcc2.c). Thus, new variables hardfp_exclusions and
softfp_extras are added that configurations using t-hardfp and
t-softfp can use to achieve the desired effect of selectively mixing
the two sources of functions.
Tested with no regressions for crosses to powerpc-linux-gnuspe (both
e500v1 and e500v2); also checked that the same set of symbols and
versions is exported from shared libgcc before and after the patch.
* config/t-hardfp (hardfp_exclusions): Document new variable for
user to define.
(hardfp_func_list): Exclude functions from $(hardfp_exclusions).
* config/t-softfp (softfp_extras): Document new variable for user
to define.
(softfp_func_list): Add functions from $(softfp_extras).
* config/rs6000/t-e500v1-fp, config/rs6000/t-e500v2-fp: New files.
* config.host (powerpc*-*-linux*): For e500v1, use
rs6000/t-e500v1-fp and t-hardfp; do not use t-softfp-sfdf and
t-softfp-excl. For e500v2, use t-hardfp-sfdf, rs6000/t-e500v2-fp
and t-hardfp; do not use t-softfp-sfdf and t-softfp-excl.
From-SVN: r216835
2014-10-29 13:59:16 +01:00
|
|
|
|
|
|
|
|
# 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/>.
|
|
|
|
|
|
|
|
|
|
# All operations except __unordsf2 and __unorddf2 can come from hardfp.c.
|
|
|
|
|
hardfp_exclusions := unordsf2 unorddf2
|
|
|
|
|
softfp_float_modes :=
|
|
|
|
|
softfp_int_modes :=
|
|
|
|
|
softfp_extensions :=
|
|
|
|
|
softfp_truncations :=
|
|
|
|
|
softfp_exclude_libgcc2 := n
|
|
|
|
|
softfp_extras := unordsf2 unorddf2
|