1# Copyright (C) 2006, 2007, 2011 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 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#
34# If the libgcc2.c functions should not be replaced, also define:
35#
36# softfp_exclude_libgcc2 := y
37#
38# Avoiding replacing the libgcc2.c functions is a temporary measure
39# for targets with both hard-float and soft-float multilibs, since
40# these variables apply for all multilibs.  With toplevel libgcc,
41# soft-fp can be used conditionally on the multilib instead.
42#
43# If the code should not be compiled at all for some multilibs, define:
44#
45# softfp_wrap_start: text to put at the start of wrapper source files,
46#                    output with echo
47#                    e.g. '#ifndef __powerpc64__'
48# softfp_wrap_end: text to put at the end of wrapper source files,
49#                  e.g. '#endif'
50#
51# This is another temporary measure.
52
53softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
54  neg$(m)2 sub$(m)3 unord$(m)2
55softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
56  float$(i)$(m) floatun$(i)$(m)
57
58softfp_func_list := \
59  $(foreach m,$(softfp_float_modes), \
60              $(softfp_float_funcs) \
61              $(foreach i,$(softfp_int_modes), \
62                          $(softfp_floatint_funcs))) \
63  $(foreach e,$(softfp_extensions),extend$(e)2) \
64  $(foreach t,$(softfp_truncations),trunc$(t)2)
65
66ifeq ($(softfp_exclude_libgcc2),y)
67# This list is taken from mklibgcc.in and doesn't presently allow for
68# 64-bit targets where si should become di and di should become ti.
69softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
70  fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
71  floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
72  floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
73endif
74
75ifeq ($(softfp_wrap_start),)
76softfp_file_list := \
77  $(addsuffix .c,$(addprefix $(srcdir)/soft-fp/,$(softfp_func_list)))
78else
79softfp_file_list := $(addsuffix .c,$(softfp_func_list))
80
81$(softfp_file_list):
82	echo $(softfp_wrap_start) > $@
83	echo '#include "soft-fp/$@"' >> $@
84	echo $(softfp_wrap_end) >> $@
85endif
86
87# Disable missing prototype and type limit warnings.  The prototypes
88# for the functions in the soft-fp files have not been brought across
89# from glibc.
90
91soft-fp-objects = $(addsuffix $(objext), $(softfp_file_list)) \
92  $(addsuffix _s$(objext), $(softfp_file_list))
93
94$(soft-fp-objects) : INTERNAL_CFLAGS += -Wno-missing-prototypes -Wno-type-limits
95
96LIB2ADD += $(softfp_file_list)
97
98ifneq ($(softfp_exclude_libgcc2),y)
99# Functions in libgcc2.c are excluded for each soft-float mode (a
100# target may have both soft-float and hard-float modes), for the fixed
101# list of integer modes (si and di) for which libgcc2.c defines any
102# such functions.  Depending on the target, the si and di symbols may
103# in fact define di and ti functions.
104
105LIB2FUNCS_EXCLUDE += \
106  $(addprefix _,$(foreach m,$(softfp_float_modes), \
107                            $(foreach i,si di, \
108                                        $(softfp_floatint_funcs))))
109endif
110