# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
# 2008, 2010 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/>.

# For most CPUs we have an assembly soft-float implementations.
# However this is not true for ARMv6M.  Here we want to use the soft-fp C
# implementation.  The soft-fp code is only build for ARMv6M.  This pulls
# in the asm implementation for other CPUs.
LIB1ASMFUNCS += _udivsi3 _divsi3 _umodsi3 _modsi3 _dvmd_tls _bb_init_func \
	_call_via_rX _interwork_call_via_rX \
	_lshrdi3 _ashrdi3 _ashldi3 \
	_arm_negdf2 _arm_addsubdf3 _arm_muldivdf3 _arm_cmpdf2 _arm_unorddf2 \
	_arm_fixdfsi _arm_fixunsdfsi \
	_arm_truncdfsf2 _arm_negsf2 _arm_addsubsf3 _arm_muldivsf3 \
	_arm_cmpsf2 _arm_unordsf2 _arm_fixsfsi _arm_fixunssfsi \
	_arm_floatdidf _arm_floatdisf _arm_floatundidf _arm_floatundisf \
	_clzsi2 _clzdi2 

MULTILIB_OPTIONS     = marm/mthumb
MULTILIB_DIRNAMES    = arm thumb

# Only we don't actually want any ARM libraries.  Or
# vanilla thumb libraries.
MULTILIB_EXCEPTIONS  = marm* mthumb

# Build with any one of arm7tdmi, M3 or M4 support.
MULTILIB_OPTIONS    += mcpu=arm7tdmi-s/mcpu=cortex-m0/mcpu=cortex-m3/mcpu=cortex-m4
MULTILIB_DIRNAMES   += arm7tdmi-s cortex-m0 cortex-m3 cortex-m4

# These don't make any sense without thumb, because GCC likes to
# tell you that you have to supply another commandline argument
# rather than just setting it itself.
MULTILIB_EXCEPTIONS += mcpu=arm7tdmi-s* mcpu=cortex-m0* mcpu=cortex-m3* mcpu=cortex-m4*

# All this just to get mfloat-abi=hard mfpu=fpv4-sp-d16 only specified for the M4
MULTILIB_OPTIONS    += mfloat-abi=hard/mfloat-abi=softfp mfpu=fpv4-sp-d16
MULTILIB_DIRNAMES   += float-abi-hard float-abi-softfp fpuv4-sp-d16
MULTILIB_EXCEPTIONS += mfloat* mthumb/mfloat*
MULTILIB_EXCEPTIONS += mfpu* mthumb/mfpu*
MULTILIB_EXCEPTIONS += mthumb/mcpu=cortex-m4/mfloat-abi=hard
MULTILIB_EXCEPTIONS += mthumb/mcpu=cortex-m4/mfloat-abi=softfp
MULTILIB_EXCEPTIONS += mthumb/mcpu=cortex-m4/mfpu=fpv4-sp-d16
MULTILIB_EXCEPTIONS += *arm7tdmi-s*mfloat-abi* *arm7tdmi-s*mfpu*
MULTILIB_EXCEPTIONS += *cortex-m3*mfloat-abi* *cortex-m3*mfpu*
MULTILIB_EXCEPTIONS += *cortex-m0*mfloat-abi* *cortex-m0*mfpu*

# instead of using MULTILIB_EXCEPTIONS it is also possible to define MULTILIB_REQUIRED
#MULTILIB_REQUIRED  = mthumb/mcpu=arm7tdmi-s
#MULTILIB_REQUIRED += mthumb/mcpu=cortex-m0
#MULTILIB_REQUIRED += mthumb/mcpu=cortex-m3
#MULTILIB_REQUIRED += mthumb/mcpu=cortex-m4
#MULTILIB_REQUIRED += mthumb/mcpu=cortex-m4/mfloat-abi=hard/mfpu=fpv4-sp-d16
#MULTILIB_REQUIRED += mthumb/mcpu=cortex-m4/mfloat-abi=softfp/mfpu=fpv4-sp-d16

EXTRA_MULTILIB_PARTS = crtbegin.o crtend.o crti.o crtn.o

# If EXTRA_MULTILIB_PARTS is not defined above then define EXTRA_PARTS here
# EXTRA_PARTS = crtbegin.o crtend.o crti.o crtn.o

LIBGCC = stmp-multilib
INSTALL_LIBGCC = install-multilib

# Currently there is a bug somewhere in GCC's alias analysis
# or scheduling code that is breaking _fpmul_parts in fp-bit.c.
# Disabling function inlining is a workaround for this problem.
TARGET_LIBGCC2_CFLAGS = -fno-inline

# Assemble startup files.
$(T)crti.o: $(srcdir)/config/arm/crti.asm $(GCC_PASSES)
	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
	-c -o $(T)crti.o -x assembler-with-cpp $(srcdir)/config/arm/crti.asm

$(T)crtn.o: $(srcdir)/config/arm/crtn.asm $(GCC_PASSES)
	$(GCC_FOR_TARGET) $(GCC_CFLAGS) $(MULTILIB_CFLAGS) $(INCLUDES) \
	-c -o $(T)crtn.o -x assembler-with-cpp $(srcdir)/config/arm/crtn.asm