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f1717362 | 1 | # Copyright (C) 2006-2016 Free Software Foundation, Inc. |
84600db5 | 2 | |
3 | # This file is part of GCC. | |
4 | ||
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) | |
8 | # any later version. | |
9 | ||
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. | |
14 | ||
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/>. | |
18 | ||
19 | # Targets using soft-fp should define the following variables: | |
20 | # | |
21 | # softfp_float_modes: a list of soft-float floating-point modes, | |
22 | # e.g. sf df | |
23 | # softfp_int_modes: a list of integer modes for which to define conversions, | |
24 | # e.g. si di | |
25 | # softfp_extensions: a list of extensions between floating-point modes, | |
26 | # e.g. sfdf | |
27 | # softfp_truncations: a list of truncations between floating-point modes, | |
28 | # e.g. dfsf | |
29 | # | |
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 | |
32 | # tf is soft-float. | |
33 | # | |
d9b5cf5c | 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. | |
37 | # | |
0e36a0d7 | 38 | # If the functions should only be built as compat symbols for shared |
39 | # libgcc, not available for new links, also define: | |
40 | # | |
41 | # softfp_compat := y | |
42 | # | |
84600db5 | 43 | # If the libgcc2.c functions should not be replaced, also define: |
44 | # | |
45 | # softfp_exclude_libgcc2 := y | |
46 | # | |
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. | |
51 | # | |
52 | # If the code should not be compiled at all for some multilibs, define: | |
53 | # | |
54 | # softfp_wrap_start: text to put at the start of wrapper source files, | |
55 | # output with echo | |
56 | # e.g. '#ifndef __powerpc64__' | |
57 | # softfp_wrap_end: text to put at the end of wrapper source files, | |
58 | # e.g. '#endif' | |
59 | # | |
0e36a0d7 | 60 | # This is another temporary measure, and cannot be used together with |
61 | # softfp_compat. | |
84600db5 | 62 | |
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 | ||
68 | softfp_func_list := \ | |
69 | $(foreach m,$(softfp_float_modes), \ | |
70 | $(softfp_float_funcs) \ | |
71 | $(foreach i,$(softfp_int_modes), \ | |
72 | $(softfp_floatint_funcs))) \ | |
73 | $(foreach e,$(softfp_extensions),extend$(e)2) \ | |
d9b5cf5c | 74 | $(foreach t,$(softfp_truncations),trunc$(t)2) \ |
75 | $(softfp_extras) | |
84600db5 | 76 | |
77 | ifeq ($(softfp_exclude_libgcc2),y) | |
78 | # This list is taken from mklibgcc.in and doesn't presently allow for | |
79 | # 64-bit targets where si should become di and di should become ti. | |
80 | softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \ | |
81 | fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \ | |
82 | floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \ | |
83 | floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list)) | |
84 | endif | |
85 | ||
0e36a0d7 | 86 | ifeq ($(softfp_compat),y) |
87 | softfp_file_list := $(addsuffix .c,$(softfp_func_list)) | |
88 | ||
89 | ifeq ($(enable_shared),yes) | |
90 | softfp_map_dep := libgcc.map.in | |
84600db5 | 91 | else |
0e36a0d7 | 92 | softfp_map_dep := |
93 | endif | |
94 | softfp_set_symver = echo "asm (\".symver $(1),$(1)@`$(AWK) -f $(srcdir)/find-symver.awk -v symbol=$(1) libgcc.map.in`\");" >> $@ | |
95 | $(softfp_file_list): $(softfp_map_dep) | |
96 | echo '#ifdef SHARED' > $@ | |
97 | echo '#include "soft-fp/$@"' >> $@ | |
98 | ifeq ($(enable_shared),yes) | |
99 | $(call softfp_set_symver,__$(*F)) | |
100 | if grep strong_alias $(srcdir)/soft-fp/$@ > /dev/null; then \ | |
101 | alias=`grep strong_alias $(srcdir)/soft-fp/$@ | sed -e 's/.*, *//' -e 's/).*//'`; \ | |
102 | $(call softfp_set_symver,$$alias); \ | |
103 | fi | |
104 | endif | |
105 | echo '#endif' >> $@ | |
c780eb05 | 106 | else |
107 | ifneq ($(softfp_wrap_start),) | |
84600db5 | 108 | softfp_file_list := $(addsuffix .c,$(softfp_func_list)) |
109 | ||
110 | $(softfp_file_list): | |
111 | echo $(softfp_wrap_start) > $@ | |
112 | echo '#include "soft-fp/$@"' >> $@ | |
113 | echo $(softfp_wrap_end) >> $@ | |
0e36a0d7 | 114 | else |
115 | softfp_file_list := \ | |
116 | $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list))) | |
84600db5 | 117 | endif |
c780eb05 | 118 | endif |
84600db5 | 119 | |
5790f80a | 120 | # Disable missing prototype and type limit warnings. The prototypes |
121 | # for the functions in the soft-fp files have not been brought across | |
122 | # from glibc. | |
123 | ||
2b8d95bc | 124 | soft-fp-objects-base = $(basename $(notdir $(softfp_file_list))) |
125 | ||
126 | soft-fp-objects = $(addsuffix $(objext), $(soft-fp-objects-base)) \ | |
127 | $(addsuffix _s$(objext), $(soft-fp-objects-base)) | |
5790f80a | 128 | |
84600db5 | 129 | $(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits |
5790f80a | 130 | |
84600db5 | 131 | LIB2ADD += $(softfp_file_list) |
5790f80a | 132 | |
84600db5 | 133 | ifneq ($(softfp_exclude_libgcc2),y) |
134 | # Functions in libgcc2.c are excluded for each soft-float mode (a | |
135 | # target may have both soft-float and hard-float modes), for the fixed | |
136 | # list of integer modes (si and di) for which libgcc2.c defines any | |
137 | # such functions. Depending on the target, the si and di symbols may | |
138 | # in fact define di and ti functions. | |
139 | ||
140 | LIB2FUNCS_EXCLUDE += \ | |
141 | $(addprefix _,$(foreach m,$(softfp_float_modes), \ | |
142 | $(foreach i,si di, \ | |
143 | $(softfp_floatint_funcs)))) | |
144 | endif |