1# Copyright (C) 2006 Free Software Foundation, Inc.
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 2, 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 COPYING.  If not, write to
17# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
18# Boston MA 02110-1301, USA.
19
20# Targets using soft-fp should define the following variables:
21#
22# softfp_float_modes: a list of soft-float floating-point modes,
23#                     e.g. sf df
24# softfp_int_modes: a list of integer modes for which to define conversions,
25#                   e.g. si di
26# softfp_extensions: a list of extensions between floating-point modes,
27#                    e.g. sfdf
28# softfp_truncations: a list of truncations between floating-point modes,
29#                     e.g. dfsf
30# softfp_machine_header: the target sfp-machine.h file (relative to config/),
31#                        e.g. rs6000/sfp-machine.h
32#
33# Extensions and truncations should include those where only one mode
34# is a soft-float mode; for example, sftf where sf is hard-float and
35# tf is soft-float.
36#
37# If the libgcc2.c functions should not be replaced, also define:
38#
39# softfp_exclude_libgcc2 := y
40#
41# Avoiding replacing the libgcc2.c functions is a temporary measure
42# for targets with both hard-float and soft-float multilibs, since
43# these variables apply for all multilibs.  With toplevel libgcc,
44# soft-fp can be used conditionally on the multilib instead.
45#
46# If the code should not be compiled at all for some multilibs, define:
47#
48# softfp_wrap_start: text to put at the start of wrapper source files,
49#                    output with echo
50#                    e.g. '#ifndef __powerpc64__'
51# softfp_wrap_end: text to put at the end of wrapper source files,
52#                  e.g. '#endif'
53#
54# This is another temporary measure.
55
56softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
57  neg$(m)2 sub$(m)3 unord$(m)2
58softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
59  float$(i)$(m) floatun$(i)$(m)
60
61softfp_func_list := \
62  $(foreach m,$(softfp_float_modes), \
63              $(softfp_float_funcs) \
64              $(foreach i,$(softfp_int_modes), \
65                          $(softfp_floatint_funcs))) \
66  $(foreach e,$(softfp_extensions),extend$(e)2) \
67  $(foreach t,$(softfp_truncations),trunc$(t)2)
68
69ifeq ($(softfp_exclude_libgcc2),y)
70# This list is taken from mklibgcc.in and doesn't presently allow for
71# 64-bit targets where si should become di and di should become ti.
72softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
73  fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
74  floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
75  floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
76endif
77
78ifeq ($(softfp_wrap_start),)
79softfp_file_list := \
80  $(addsuffix .c,$(addprefix $(srcdir)/config/soft-fp/,$(softfp_func_list)))
81else
82softfp_file_list := $(addsuffix .c,$(softfp_func_list))
83
84$(softfp_file_list):
85	echo $(softfp_wrap_start) > $@
86	echo '#include "config/soft-fp/$@"' >> $@
87	echo $(softfp_wrap_end) >> $@
88endif
89
90LIB2FUNCS_EXTRA += $(softfp_file_list)
91
92ifneq ($(softfp_exclude_libgcc2),y)
93# Functions in libgcc2.c are excluded for each soft-float mode (a
94# target may have both soft-float and hard-float modes), for the fixed
95# list of integer modes (si and di) for which libgcc2.c defines any
96# such functions.  Depending on the target, the si and di symbols may
97# in fact define di and ti functions.
98
99LIB2FUNCS_EXCLUDE += \
100  $(addprefix _,$(foreach m,$(softfp_float_modes), \
101                            $(foreach i,si di, \
102                                        $(softfp_floatint_funcs))))
103endif
104
105SFP_MACHINE := sfp-machine.h
106
107$(SFP_MACHINE): $(srcdir)/config/$(softfp_machine_header)
108	cp $(srcdir)/config/$(softfp_machine_header) $(SFP_MACHINE)
109