1 # Copyright (C) 2006-2023 Free Software Foundation, Inc.
3 # This file is part of GCC.
5 # GCC is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3, or (at your option)
10 # GCC is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with GCC; see the file COPYING3. If not see
17 # <http://www.gnu.org/licenses/>.
19 # Targets using soft-fp should define the following variables:
21 # softfp_float_modes: a list of soft-float floating-point modes,
23 # softfp_int_modes: a list of integer modes for which to define conversions,
25 # softfp_extensions: a list of extensions between floating-point modes,
27 # softfp_truncations: a list of truncations between floating-point modes,
30 # Extensions and truncations should include those where only one mode
31 # is a soft-float mode; for example, sftf where sf is hard-float and
34 # If some additional functions should be built that are not implied by
35 # the above settings, also define softfp_extras as a list of those
36 # functions, e.g. unorddf2.
38 # If the functions should only be built as compat symbols for shared
39 # libgcc, not available for new links, also define:
43 # If the libgcc2.c functions should not be replaced, also define:
45 # softfp_exclude_libgcc2 := y
47 # Avoiding replacing the libgcc2.c functions is a temporary measure
48 # for targets with both hard-float and soft-float multilibs, since
49 # these variables apply for all multilibs. With toplevel libgcc,
50 # soft-fp can be used conditionally on the multilib instead.
52 # If the code should not be compiled at all for some multilibs, define:
54 # softfp_wrap_start: text to put at the start of wrapper source files,
56 # e.g. '#ifndef __powerpc64__'
57 # softfp_wrap_end: text to put at the end of wrapper source files,
60 # This is another temporary measure, and cannot be used together with
63 softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
64 neg$(m)2 sub$(m)3 unord$(m)2
65 softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
66 float$(i)$(m) floatun$(i)$(m)
67 softfp_floatbitint_funcs = fix$(m)bitint floatbitint$(m)
69 ifeq ($(decimal_float),yes)
70 ifeq ($(enable_decimal_float),bid)
71 softfp_bid_list += bitintpow10 \
72 $(foreach m,sd dd td,fix$(m)bitint floatbitint$(m) \
73 fix$(m)ti fixuns$(m)ti \
74 floatti$(m) floatunti$(m))
79 $(foreach m,$(softfp_float_modes), \
80 $(softfp_float_funcs) \
81 $(foreach i,$(softfp_int_modes), \
82 $(softfp_floatint_funcs))) \
83 $(foreach m,sf df,$(softfp_floatbitint_funcs)) \
84 $(foreach e,$(softfp_extensions),extend$(e)2) \
85 $(foreach t,$(softfp_truncations),trunc$(t)2) \
88 ifeq ($(softfp_exclude_libgcc2),y)
89 # This list is taken from mklibgcc.in and doesn't presently allow for
90 # 64-bit targets where si should become di and di should become ti.
91 softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
92 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
93 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
94 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
97 ifeq ($(softfp_compat),y)
98 softfp_file_list := $(addsuffix .c,$(softfp_func_list))
100 ifeq ($(enable_shared),yes)
101 softfp_map_dep := libgcc.map.in
105 softfp_set_symver = echo "asm (\".symver $(1),$(1)@`$(AWK) -f $(srcdir)/find-symver.awk -v symbol=$(1) libgcc.map.in`\");" >> $@
106 $(softfp_file_list): $(softfp_map_dep)
107 echo '#ifdef SHARED' > $@
108 echo '#include "soft-fp/$@"' >> $@
109 ifeq ($(enable_shared),yes)
110 $(call softfp_set_symver,__$(*F))
111 if grep strong_alias $(srcdir)/soft-fp/$@ > /dev/null; then \
112 alias=`grep strong_alias $(srcdir)/soft-fp/$@ | sed -e 's/.*, *//' -e 's/).*//'`; \
113 $(call softfp_set_symver,$$alias); \
118 ifneq ($(softfp_wrap_start),)
119 softfp_file_list := $(addsuffix .c,$(softfp_func_list))
122 echo $(softfp_wrap_start) > $@
123 echo '#include "soft-fp/$@"' >> $@
124 echo $(softfp_wrap_end) >> $@
126 softfp_file_list := \
127 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list)))
130 softfp_bid_file_list := \
131 $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_bid_list)))
133 # Disable missing prototype and type limit warnings. The prototypes
134 # for the functions in the soft-fp files have not been brought across
137 soft-fp-objects-base = $(basename $(notdir $(softfp_file_list)))
139 soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \
140 $(addsuffix _s$(objext), $(soft-fp-objects-base))
142 $(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits
144 LIB2ADD += $(softfp_file_list)
145 LIB2ADD_ST += $(softfp_bid_file_list)
147 ifneq ($(softfp_exclude_libgcc2),y)
148 # Functions in libgcc2.c are excluded for each soft-float mode (a
149 # target may have both soft-float and hard-float modes), for the fixed
150 # list of integer modes (si and di) for which libgcc2.c defines any
151 # such functions. Depending on the target, the si and di symbols may
152 # in fact define di and ti functions.
154 LIB2FUNCS_EXCLUDE += \
155 $(addprefix _,$(foreach m,$(softfp_float_modes), \
157 $(softfp_floatint_funcs))))