| # Copyright (C) 2006-2023 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 |