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a945c346 | 1 | # Copyright (C) 2014-2024 Free Software Foundation, Inc. |
1c51d688 RS |
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 | # For historical reasons, some targets provide a full set of FP routines | |
20 | # even if there is native hardware support for some of them. This file | |
21 | # is used to define functions that can be implemented directly in hardware. | |
22 | # For example, an __adddf3 defined by this file will use an FPU addition. | |
23 | # | |
24 | # The following variables should be set up before including this file: | |
25 | # | |
26 | # hardfp_float_modes: a list of hardware floating-point modes. | |
27 | # e.g. sf df | |
28 | # hardfp_int_modes: a list of integer modes for which to define conversions; | |
29 | # usually this is "si", since libgcc2.c provides routines | |
30 | # for wider modes | |
31 | # hardfp_extensions: a list of extensions between hardware floating-point modes, | |
32 | # e.g. sfdf | |
33 | # hardfp_truncations: a list of truncations between hardware floating-point | |
34 | # modes, e.g. dfsf | |
bc1b3a88 JM |
35 | # |
36 | # If some functions that would otherwise be defined should not be | |
37 | # defined by this file (typically because the target would compile | |
38 | # certain operations into a call to the libgcc function, which thus | |
39 | # needs to be defined elsewhere to use software floating point), also | |
40 | # define hardfp_exclusions to be a list of those functions, | |
41 | # e.g. unorddf2. | |
1c51d688 RS |
42 | |
43 | # Functions parameterized by a floating-point mode M. | |
44 | hardfp_func_bases := addM3 subM3 negM2 mulM3 divM3 | |
45 | hardfp_func_bases += eqM2 neM2 geM2 gtM2 leM2 ltM2 unordM2 | |
46 | ||
47 | # Functions parameterized by both a floating-point mode M and an integer mode N. | |
48 | hardfp_int_func_bases := fixMN floatNM floatunNM | |
49 | hardfp_func_bases += $(foreach n, $(hardfp_int_modes), \ | |
50 | $(subst N,$(n),$(hardfp_int_func_bases))) | |
51 | ||
52 | # Get the full list of functions. | |
53 | hardfp_func_list := $(foreach m, $(hardfp_float_modes), \ | |
54 | $(subst M,$(m),$(hardfp_func_bases))) | |
55 | hardfp_func_list += $(foreach pair, $(hardfp_extensions), \ | |
56 | $(subst M,$(pair),extendM2)) | |
57 | hardfp_func_list += $(foreach pair, $(hardfp_truncations), \ | |
58 | $(subst M,$(pair),truncM2)) | |
59 | ||
bc1b3a88 JM |
60 | hardfp_func_list := $(filter-out $(hardfp_exclusions),$(hardfp_func_list)) |
61 | ||
1c51d688 RS |
62 | # Regexp for matching a floating-point mode. |
63 | hardfp_mode_regexp := $(shell echo $(hardfp_float_modes) | sed 's/ /\\|/g') | |
64 | ||
65 | # Regexp for matching the end of a function name, after the last | |
66 | # floating-point mode. | |
67 | hardfp_suffix_regexp := $(shell echo $(hardfp_int_modes) 2 3 | sed 's/ /\\|/g') | |
68 | ||
69 | # Add -D options to define: | |
70 | # FUNC: the function name (e.g. __addsf3) | |
71 | # OP: the function name without the leading __ and with the last | |
72 | # floating-point mode removed (e.g. add3) | |
73 | # TYPE: the last floating-point mode (e.g. sf) | |
74 | hardfp_defines_for = \ | |
75 | $(shell echo $1 | \ | |
76 | sed 's/\(.*\)\($(hardfp_mode_regexp)\)\($(hardfp_suffix_regexp)\|\)$$/-DFUNC=__& -DOP_\1\3 -DTYPE=\2/') | |
77 | ||
78 | hardfp-o = $(patsubst %,%$(objext),$(hardfp_func_list)) | |
79 | $(hardfp-o): %$(objext): $(srcdir)/config/hardfp.c | |
80 | @echo "Mode = $(hardfp_mode_regexp)" | |
81 | @echo "Suffix = $(hardfp_suffix_regexp)" | |
82 | $(gcc_compile) $(call hardfp_defines_for, $*) -c $< $(vis_hide) -Wno-missing-prototypes | |
83 | libgcc-objects += $(hardfp-o) | |
84 | ||
85 | ifeq ($(enable_shared),yes) | |
86 | hardfp-s-o = $(patsubst %,%_s$(objext),$(hardfp_func_list)) | |
87 | $(hardfp-s-o): %_s$(objext): $(srcdir)/config/hardfp.c | |
88 | $(gcc_s_compile) $(call hardfp_defines_for, $*) -c $< -Wno-missing-prototypes | |
89 | libgcc-s-objects += $(hardfp-s-o) | |
90 | endif |