comparison gcc/config/soft-fp/t-softfp @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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1 # Copyright (C) 2006, 2007 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 # softfp_machine_header: the target sfp-machine.h file (relative to config/),
30 # e.g. rs6000/sfp-machine.h
31 #
32 # Extensions and truncations should include those where only one mode
33 # is a soft-float mode; for example, sftf where sf is hard-float and
34 # tf is soft-float.
35 #
36 # If the libgcc2.c functions should not be replaced, also define:
37 #
38 # softfp_exclude_libgcc2 := y
39 #
40 # Avoiding replacing the libgcc2.c functions is a temporary measure
41 # for targets with both hard-float and soft-float multilibs, since
42 # these variables apply for all multilibs. With toplevel libgcc,
43 # soft-fp can be used conditionally on the multilib instead.
44 #
45 # If the code should not be compiled at all for some multilibs, define:
46 #
47 # softfp_wrap_start: text to put at the start of wrapper source files,
48 # output with echo
49 # e.g. '#ifndef __powerpc64__'
50 # softfp_wrap_end: text to put at the end of wrapper source files,
51 # e.g. '#endif'
52 #
53 # This is another temporary measure.
54
55 softfp_float_funcs = add$(m)3 div$(m)3 eq$(m)2 ge$(m)2 le$(m)2 mul$(m)3 \
56 neg$(m)2 sub$(m)3 unord$(m)2
57 softfp_floatint_funcs = fix$(m)$(i) fixuns$(m)$(i) \
58 float$(i)$(m) floatun$(i)$(m)
59
60 softfp_func_list := \
61 $(foreach m,$(softfp_float_modes), \
62 $(softfp_float_funcs) \
63 $(foreach i,$(softfp_int_modes), \
64 $(softfp_floatint_funcs))) \
65 $(foreach e,$(softfp_extensions),extend$(e)2) \
66 $(foreach t,$(softfp_truncations),trunc$(t)2)
67
68 ifeq ($(softfp_exclude_libgcc2),y)
69 # This list is taken from mklibgcc.in and doesn't presently allow for
70 # 64-bit targets where si should become di and di should become ti.
71 softfp_func_list := $(filter-out floatdidf floatdisf fixunsdfsi fixunssfsi \
72 fixunsdfdi fixdfdi fixunssfdi fixsfdi fixxfdi fixunsxfdi \
73 floatdixf fixunsxfsi fixtfdi fixunstfdi floatditf \
74 floatundidf floatundisf floatundixf floatunditf,$(softfp_func_list))
75 endif
76
77 ifeq ($(softfp_wrap_start),)
78 softfp_file_list := \
79 $(addsuffix .c,$(addprefix $(srcdir)/config/soft-fp/,$(softfp_func_list)))
80 else
81 softfp_file_list := $(addsuffix .c,$(softfp_func_list))
82
83 $(softfp_file_list):
84 echo $(softfp_wrap_start) > $@
85 echo '#include "config/soft-fp/$@"' >> $@
86 echo $(softfp_wrap_end) >> $@
87 endif
88
89 LIB2FUNCS_EXTRA += $(softfp_file_list)
90
91 ifneq ($(softfp_exclude_libgcc2),y)
92 # Functions in libgcc2.c are excluded for each soft-float mode (a
93 # target may have both soft-float and hard-float modes), for the fixed
94 # list of integer modes (si and di) for which libgcc2.c defines any
95 # such functions. Depending on the target, the si and di symbols may
96 # in fact define di and ti functions.
97
98 LIB2FUNCS_EXCLUDE += \
99 $(addprefix _,$(foreach m,$(softfp_float_modes), \
100 $(foreach i,si di, \
101 $(softfp_floatint_funcs))))
102 endif
103
104 SFP_MACHINE := sfp-machine.h
105
106 $(SFP_MACHINE): $(srcdir)/config/$(softfp_machine_header)
107 cp $(srcdir)/config/$(softfp_machine_header) $(SFP_MACHINE)