# multilibs  -*- mode:Makefile -*-
#
# Copyright (C) 2007-2022 Free Software Foundation, Inc.
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GCC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# An awk command to extract lines from the m68k-devices.def file that
# match $1 and then print the string defined by $2.  Leading and
# trailing whitespace is removed.  $1 & $2 can make use of
# CPU -- the cpu identifier (has leading 'm'/'mcf')
# FLAGS -- the cpu capability flags
# CPU_NAME -- the cpu name (has no leading m/mcf)
# MLIB -- the multilib cpu name (no leading m/mcf)
# This is intended to be used as $(call M68K_AWK,predicate,string)
M68K_AWK = $(strip $(shell $(AWK) 'BEGIN { FS="[ \t]*[,()][ \t]*"; ORS=" " }; \
	/^M68K_DEVICE/ { CPU=$$3; FLAGS=$$8; \
	CPU_NAME=substr($$2,2,length($$2)-2); \
	MLIB=substr($$5,2,length($$5)-2); \
	if ($1) print $2 }' $(srcdir)/config/m68k/m68k-devices.def))

# Add a multilib for each distinct architecture.  M68K_MLIB_CPU, if defined,
# adds additional restrictions.
M68K_MLIB_CPUS := $(call M68K_AWK,\
	(CPU_NAME == MLIB) $(M68K_MLIB_CPU), \
	"m"MLIB)

# Make the default cpu the default multilib.
M68K_MLIB_DEFAULT := $(call M68K_AWK, CPU == "$(target_cpu_default)", MLIB)

ifeq ($(filter m$(M68K_MLIB_DEFAULT),$(M68K_MLIB_CPUS)),)
$(error Error default cpu '$(target_cpu_default)' is not in multilib set '$(M68K_MLIB_CPUS)')
endif

MULTILIB_DIRNAMES := $(filter-out m$(M68K_MLIB_DEFAULT),$(M68K_MLIB_CPUS))
MULTILIB_OPTIONS := $(shell echo $(MULTILIB_DIRNAMES:m%=mcpu=%) \
		      | sed -e 's| |/|g' )

# Add subtarget specific options & dirs.
MULTILIB_DIRNAMES += $(M68K_MLIB_DIRNAMES)
MULTILIB_OPTIONS += $(M68K_MLIB_OPTIONS)

MULTILIB_MATCHES :=

ifneq ($(M68K_ARCH),cf)
# Map -march=* options to the representative -mcpu=* option.
MULTILIB_MATCHES += mcpu?68000=march?68000 \
		    mcpu?68020=march?68020 \
		    mcpu?68030=march?68030 \
		    mcpu?68040=march?68040 \
		    mcpu?68060=march?68060 \
		    mcpu?cpu32=march?cpu32
endif

ifneq ($(M68K_ARCH),m68k)
# Map -march=* options to the representative -mcpu=* option.
MULTILIB_MATCHES += mcpu?5206e=march?isaa mcpu?5208=march?isaaplus \
		    mcpu?5407=march?isab
endif

# Match non-representative -mcpu options to their representative option.
MULTILIB_MATCHES += \
  $(call M68K_AWK, \
	 (CPU_NAME != MLIB) $(M68K_MLIB_CPU), \
	 ("mcpu?"MLIB"=mcpu?"CPU_NAME))

MULTILIB_EXCEPTIONS :=

ifeq ($(firstword $(M68K_MLIB_OPTIONS)),msoft-float)
# Exclude soft-float multilibs for targets that default to soft-float anyway.
MULTILIB_EXCEPTIONS += $(call M68K_AWK,\
	(CPU_NAME == MLIB) $(M68K_MLIB_CPU) \
	 && (((CPU ~ "^mcf") && !match(FLAGS, "FL_CF_FPU")) \
	     || CPU == "cpu32" \
	     || CPU == "m68000"), \
	 "mcpu="MLIB"/msoft-float*")
endif

# Remove the default CPU from the explicit exceptions.
MULTILIB_EXCEPTIONS := \
	$(patsubst mcpu=$(M68K_MLIB_DEFAULT)/%,%,$(MULTILIB_EXCEPTIONS))