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# Copyright (C) 2006-2018 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/>.
# Targets using soft-fp should define the following variables:
#
# softfp_float_modes: a list of soft-float floating-point modes,
# e.g. sf df
# softfp_int_modes: a list of integer modes for which to define conversions,
# e.g. si di
# softfp_extensions: a list of extensions between floating-point modes,
# e.g. sfdf
# softfp_truncations: a list of truncations between floating-point modes,
# e.g. dfsf
#
# Extensions and truncations should include those where only one mode
# is a soft-float mode; for example, sftf where sf is hard-float and
# tf is soft-float.
#
# If some additional functions should be built that are not implied by
# the above settings, also define softfp_extras as a list of those
# functions, e.g. unorddf2.
#
# If the functions should only be built as compat symbols for shared
# libgcc, not available for new links, also define:
#
# softfp_compat := y
#
# If the libgcc2.c functions should not be replaced, also define:
#
# softfp_exclude_libgcc2 := y
#
# Avoiding replacing the libgcc2.c functions is a temporary measure
# for targets with both hard-float and soft-float multilibs, since
# these variables apply for all multilibs. With toplevel libgcc,
# soft-fp can be used conditionally on the multilib instead.
#
# If the code should not be compiled at all for some multilibs, define:
#
# softfp_wrap_start: text to put at the start of wrapper source files,
# output with echo
# e.g. '#ifndef __powerpc64__'
# softfp_wrap_end: text to put at the end of wrapper source files,
# e.g. '#endif'
#
# This is another temporary measure, and cannot be used together with
# softfp_compat.
softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
neg$(m)2 sub$(m)3 unord$(m)2
softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
float$(i)$(m) floatun$(i)$(m)
softfp_func_list := \
$(foreach m,$(softfp_float_modes), \
$(softfp_float_funcs) \
$(foreach i,$(softfp_int_modes), \
$(softfp_floatint_funcs))) \
$(foreach e,$(softfp_extensions),extend$(e)2) \
$(foreach t,$(softfp_truncations),trunc$(t)2) \
$(softfp_extras)
ifeq ($(softfp_exclude_libgcc2),y)
# This list is taken from mklibgcc.in and doesn't presently allow for
# 64-bit targets where si should become di and di should become ti.
softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
endif
ifeq ($(softfp_compat),y)
softfp_file_list := $(addsuffix .c,$(softfp_func_list))
ifeq ($(enable_shared),yes)
softfp_map_dep := libgcc.map.in
else
softfp_map_dep :=
endif
softfp_set_symver = echo "asm (\".symver $(1),$(1)@`$(AWK) -f $(srcdir)/find-symver.awk -v symbol=$(1) libgcc.map.in`\");" >> $@
$(softfp_file_list): $(softfp_map_dep)
echo '#ifdef SHARED' > $@
echo '#include "soft-fp/$@"' >> $@
ifeq ($(enable_shared),yes)
$(call softfp_set_symver,__$(*F))
if grep strong_alias $(srcdir)/soft-fp/$@ > /dev/null; then \
alias=`grep strong_alias $(srcdir)/soft-fp/$@ | sed -e 's/.*, *//' -e 's/).*//'`; \
$(call softfp_set_symver,$$alias); \
fi
endif
echo '#endif' >> $@
else
ifneq ($(softfp_wrap_start),)
softfp_file_list := $(addsuffix .c,$(softfp_func_list))
$(softfp_file_list):
echo $(softfp_wrap_start) > $@
echo '#include "soft-fp/$@"' >> $@
echo $(softfp_wrap_end) >> $@
else
softfp_file_list := \
$(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list)))
endif
endif
# Disable missing prototype and type limit warnings. The prototypes
# for the functions in the soft-fp files have not been brought across
# from glibc.
soft-fp-objects-base = $(basename $(notdir $(softfp_file_list)))
soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \
$(addsuffix _s$(objext), $(soft-fp-objects-base))
$(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits
LIB2ADD += $(softfp_file_list)
ifneq ($(softfp_exclude_libgcc2),y)
# Functions in libgcc2.c are excluded for each soft-float mode (a
# target may have both soft-float and hard-float modes), for the fixed
# list of integer modes (si and di) for which libgcc2.c defines any
# such functions. Depending on the target, the si and di symbols may
# in fact define di and ti functions.
LIB2FUNCS_EXCLUDE += \
$(addprefix _,$(foreach m,$(softfp_float_modes), \
$(foreach i,si di, \
$(softfp_floatint_funcs))))
endif
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