# Copyright (C) 2016 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/>.

# This is a target makefile fragment that attempts to get
# multilibs built for the range of CPU's, FPU's and ABI's that
# are relevant for the ARM architecture.  It should not be used in
# conjunction with another make file fragment and assumes --with-arch,
# --with-cpu, --with-fpu, --with-float, --with-mode have their default
# values during the configure step.  We enforce this during the
# top-level configury.

MULTILIB_OPTIONS     =
MULTILIB_DIRNAMES    =
MULTILIB_EXCEPTIONS  =
MULTILIB_MATCHES     =
MULTILIB_REUSE	     =
MULTILIB_REQUIRED    =

comma := ,
tm_multilib_list := $(subst $(comma), ,$(TM_MULTILIB_CONFIG))

HAS_APROFILE := $(filter aprofile,$(tm_multilib_list))
HAS_RMPROFILE := $(filter rmprofile,$(tm_multilib_list))

# Produce the combinatorial list of extensions.  Where there are
# multiple permutations for a combination, the ordering is the
# selected by the forward ordering of the original list.  This matches
# the canonical ordering generated by the canonicalizer in the driver.
#
# For example,
#   $(call all_feat_combs, a b)
# will produce
#   +a +a+b +b
# but will not include
#   +b+a
# The rule is recursive and can be called with any (reasonable) list of
# extensions.
all_feat_combs	= +$(firstword $(1)) \
		  $(if $(wordlist 2, $(words $(1)), $(1)), \
		    $(foreach OPT, \
		      $(call all_feat_combs, \
		        $(wordlist 2, $(words $(1)), $(1))), \
		      +$(firstword $(1))$(OPT) $(OPT)),)

# Variables used.
all_early_arch		:= armv5e armv5tej armv6 armv6j armv6k armv6z armv6kz \
			   armv6zk armv6t2 iwmmxt iwmmxt2
v7_a_nosimd_variants	:= +fp +vfpv3 +vfpv3-d16-fp16 +vfpv3-fp16 +vfpv4-d16 +vfpv4
v7_a_simd_variants	:= +simd +neon-fp16 +neon-vfpv4
v7ve_nosimd_variants	:= +vfpv3-d16 +vfpv3 +vfpv3-d16-fp16 +vfpv3-fp16 +fp +vfpv4
v7ve_vfpv3_simd_variants := +neon +neon-fp16
v7ve_vfpv4_simd_variants := +simd
v8_a_nosimd_variants	:= +crc
v8_a_simd_variants	:= $(call all_feat_combs, simd crypto)
v8_1_a_simd_variants	:= $(call all_feat_combs, simd crypto)
v8_2_a_simd_variants	:= $(call all_feat_combs, simd fp16 crypto dotprod)


ifneq (,$(HAS_APROFILE))
include $(srcdir)/config/arm/t-aprofile
endif
ifneq (,$(HAS_RMPROFILE))
include $(srcdir)/config/arm/t-rmprofile
endif
SEP := $(and $(HAS_APROFILE),$(HAS_RMPROFILE),/)


MULTILIB_OPTIONS	+= marm/mthumb
MULTILIB_DIRNAMES	+= arm thumb

MULTILIB_OPTIONS	+= march=armv5te+fp/march=armv7/march=armv7+fp/$(MULTI_ARCH_OPTS_A)$(SEP)$(MULTI_ARCH_OPTS_RM)
MULTILIB_DIRNAMES	+= v5te v7 v7+fp $(MULTI_ARCH_DIRS_A) $(MULTI_ARCH_DIRS_RM)

MULTILIB_OPTIONS	+= mfloat-abi=soft/mfloat-abi=softfp/mfloat-abi=hard
MULTILIB_DIRNAMES	+= nofp softfp hard

MULTILIB_REQUIRED	+= mthumb/mfloat-abi=soft
MULTILIB_REQUIRED	+= marm/march=armv5te+fp/mfloat-abi=softfp
MULTILIB_REQUIRED	+= marm/march=armv5te+fp/mfloat-abi=hard

MULTILIB_REQUIRED	+= mthumb/march=armv7/mfloat-abi=soft
MULTILIB_REQUIRED	+= mthumb/march=armv7+fp/mfloat-abi=softfp
MULTILIB_REQUIRED	+= mthumb/march=armv7+fp/mfloat-abi=hard

# Map v7-r down onto common v7 code.
MULTILIB_MATCHES	+= march?armv7=march?armv7-r
MULTILIB_MATCHES	+= march?armv7=march?armv7-r+idiv
MULTILIB_MATCHES	+= march?armv7+fp=march?armv7-r+fp
MULTILIB_MATCHES	+= march?armv7+fp=march?armv7-r+fp+idiv

MULTILIB_MATCHES	+= $(foreach ARCH, $(all_early_arch), \
			     march?armv5te+fp=march?$(ARCH)+fp)

ifeq (,$(HAS_APROFILE))
# Map all v7-a
MULTILIB_MATCHES	+= march?armv7=march?armv7-a
MULTILIB_MATCHES	+= $(foreach ARCH, $(v7_a_nosimd_variants) $(v7_a_simd_variants), \
			     march?armv7+fp=march?armv7-a$(ARCH))

MULTILIB_MATCHES	+= march?armv7=march?armv7ve

# ARMv7ve FP/SIMD variants: map down to v7+fp
MULTILIB_MATCHES	+= $(foreach ARCH, $(v7ve_nosimd_variants) $(v7ve_vfpv3_simd_variants) $(v7ve_vfpv4_simd_variants), \
			     march?armv7+fp=march?armv7ve$(ARCH))

# ARMv8
MULTILIB_MATCHES	+= march?armv7=march?armv8-a
MULTILIB_MATCHES	+= $(foreach ARCH, $(v8_a_nosimd_variants), \
			     march?armv7=march?armv8-a$(ARCH))

# ARMv8 with SIMD
MULTILIB_MATCHES	+= march?armv7+fp=march?armv8-a+crc+simd \
			   $(foreach ARCH, $(v8_a_simd_variants), \
			     march?armv7+fp=march?armv8-a$(ARCH) \
			     march?armv7+fp=march?armv8-a+crc$(ARCH))

# Baseline v8.1-a
MULTILIB_MATCHES	+= march?armv7=march?armv8.1-a

# Map all v8.1-a SIMD variants
MULTILIB_MATCHES	+= $(foreach ARCH, $(v8_1_a_simd_variants), \
			     march?armv7+fp=march?armv8.1-a$(ARCH))

# Baseline v8.2-a: map down to baseline v8-a
MULTILIB_MATCHES	+= march?armv7=march?armv8.2-a

# Map all v8.2-a SIMD variants
MULTILIB_MATCHES	+= $(foreach ARCH, $(v8_2_a_simd_variants), \
			     march?armv7+fp=march?armv8.2-a$(ARCH))

# Use Thumb libraries for everything.

MULTILIB_REUSE		+= mthumb/march.armv7/mfloat-abi.soft=marm/march.armv7/mfloat-abi.soft

MULTILIB_REUSE		+= $(foreach ABI, hard softfp, \
			     $(foreach ARCH, armv7+fp, \
			       mthumb/march.$(ARCH)/mfloat-abi.$(ABI)=marm/march.$(ARCH)/mfloat-abi.$(ABI)))

# Softfp but no FP, use the soft-float libraries.
MULTILIB_REUSE		+= $(foreach MODE, arm thumb, \
			     $(foreach ARCH, armv7, \
			       mthumb/march.$(ARCH)/mfloat-abi.soft=m$(MODE)/march.$(ARCH)/mfloat-abi.softfp))

endif		# Not APROFILE.