1# multilibs  -*- mode:Makefile -*-
2#
3# Copyright (C) 2007-2015 Free Software Foundation, Inc.
4#
5# This file is part of GCC.
6#
7# GCC is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 3, or (at your option)
10# any later version.
11#
12# GCC is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with GCC; see the file COPYING3.  If not see
19# <http://www.gnu.org/licenses/>.
20
21# An awk command to extract lines from the m68k-devices.def file that
22# match $1 and then print the string defined by $2.  Leading and
23# trailing whitespace is removed.  $1 & $2 can make use of
24# CPU -- the cpu identifier (has leading 'm'/'mcf')
25# FLAGS -- the cpu capability flags
26# CPU_NAME -- the cpu name (has no leading m/mcf)
27# MLIB -- the multilib cpu name (no leading m/mcf)
28# This is intended to be used as $(call M68K_AWK,predicate,string)
29M68K_AWK = $(strip $(shell $(AWK) 'BEGIN { FS="[ \t]*[,()][ \t]*"; ORS=" " }; \
30	/^M68K_DEVICE/ { CPU=$$3; FLAGS=$$8; \
31	CPU_NAME=substr($$2,2,length($$2)-2); \
32	MLIB=substr($$5,2,length($$5)-2); \
33	if ($1) print $2 }' $(srcdir)/config/m68k/m68k-devices.def))
34
35# Add a multilib for each distinct architecture.  M68K_MLIB_CPU, if defined,
36# adds additional restrictions.
37M68K_MLIB_CPUS := $(call M68K_AWK,\
38	(CPU_NAME == MLIB) $(M68K_MLIB_CPU), \
39	"m"MLIB)
40
41# Make the default cpu the default multilib.
42M68K_MLIB_DEFAULT := $(call M68K_AWK, CPU == "$(target_cpu_default)", MLIB)
43
44ifeq ($(filter m$(M68K_MLIB_DEFAULT),$(M68K_MLIB_CPUS)),)
45$(error Error default cpu '$(target_cpu_default)' is not in multilib set '$(M68K_MLIB_CPUS)')
46endif
47
48MULTILIB_DIRNAMES := $(filter-out m$(M68K_MLIB_DEFAULT),$(M68K_MLIB_CPUS))
49MULTILIB_OPTIONS := $(shell echo $(MULTILIB_DIRNAMES:m%=mcpu=%) \
50		      | sed -e 's| |/|g' )
51
52# Add subtarget specific options & dirs.
53MULTILIB_DIRNAMES += $(M68K_MLIB_DIRNAMES)
54MULTILIB_OPTIONS += $(M68K_MLIB_OPTIONS)
55
56MULTILIB_MATCHES :=
57
58ifneq ($(M68K_ARCH),cf)
59# Map -march=* options to the representative -mcpu=* option.
60MULTILIB_MATCHES += mcpu?68000=march?68000 \
61		    mcpu?68020=march?68020 \
62		    mcpu?68030=march?68030 \
63		    mcpu?68040=march?68040 \
64		    mcpu?68060=march?68060 \
65		    mcpu?cpu32=march?cpu32
66endif
67
68ifneq ($(M68K_ARCH),m68k)
69# Map -march=* options to the representative -mcpu=* option.
70MULTILIB_MATCHES += mcpu?5206e=march?isaa mcpu?5208=march?isaaplus \
71		    mcpu?5407=march?isab
72endif
73
74# Match non-representative -mcpu options to their representative option.
75MULTILIB_MATCHES += \
76  $(call M68K_AWK, \
77	 (CPU_NAME != MLIB) $(M68K_MLIB_CPU), \
78	 ("mcpu?"MLIB"=mcpu?"CPU_NAME))
79
80MULTILIB_EXCEPTIONS :=
81
82ifeq ($(firstword $(M68K_MLIB_OPTIONS)),msoft-float)
83# Exclude soft-float multilibs for targets that default to soft-float anyway.
84MULTILIB_EXCEPTIONS += $(call M68K_AWK,\
85	(CPU_NAME == MLIB) $(M68K_MLIB_CPU) \
86	 && (((CPU ~ "^mcf") && !match(FLAGS, "FL_CF_FPU")) \
87	     || CPU == "cpu32" \
88	     || CPU == "m68000"), \
89	 "mcpu="MLIB"/msoft-float*")
90endif
91
92# Remove the default CPU from the explicit exceptions.
93MULTILIB_EXCEPTIONS := \
94	$(patsubst mcpu=$(M68K_MLIB_DEFAULT)/%,%,$(MULTILIB_EXCEPTIONS))
95