# 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
MULTILIB_EXCEPTIONS  =
MULTILIB_MATCHES     =

MULTILIB_OPTIONS      += march=armv7
MULTILIB_DIRNAMES     += armv7
MULTILIB_EXCEPTIONS   += march=armv7* marm/*march=armv7*
MULTILIB_MATCHES      += march?armv7=march?armv7-a
MULTILIB_MATCHES      += march?armv7=march?armv7-r
MULTILIB_MATCHES      += march?armv7=march?armv7-m
MULTILIB_MATCHES      += march?armv7=mcpu?cortex-a8
MULTILIB_MATCHES      += march?armv7=mcpu?cortex-r4

MULTILIB_OPTIONS      += mcpu=cortex-m3
MULTILIB_DIRNAMES     += cortex-m3
MULTILIB_EXCEPTIONS   += mcpu=cortex-m3* *march=armv7*/mcpu=cortex-m3*  marm/*mcpu=cortex-m3*
MULTILIB_MATCHES      += mcpu?cortex-m3=mtune?cortex-m3


# Not quite true.  We can support hard-vfp calling in Thumb2, but how do we
# express that here?  Also, we really need architecture v5e or later
# (mcrr etc).
#MULTILIB_OPTIONS       += mfloat-abi=hard
#MULTILIB_DIRNAMES      += fpu
#MULTILIB_EXCEPTIONS    += *mthumb/*mfloat-abi=hard*

# MULTILIB_OPTIONS    += mcpu=ep9312
# MULTILIB_DIRNAMES   += ep9312
# MULTILIB_EXCEPTIONS += *mthumb/*mcpu=ep9312*
#     
#MULTILIB_OPTIONS     += mlittle-endian/mbig-endian
#MULTILIB_DIRNAMES    += le be
#MULTILIB_MATCHES     += mbig-endian=mbe mlittle-endian=mle
#
#MULTILIB_OPTIONS    += mhard-float/msoft-float
#MULTILIB_DIRNAMES   += fpu soft
#MULTILIB_EXCEPTIONS += *mthumb/*mhard-float*
#
MULTILIB_OPTIONS    += mno-thumb-interwork/mthumb-interwork
MULTILIB_DIRNAMES   += normal interwork
#
# MULTILIB_OPTIONS    += fno-leading-underscore/fleading-underscore
# MULTILIB_DIRNAMES   += elf under
#
# MULTILIB_OPTIONS    += mcpu=arm7
# MULTILIB_DIRNAMES   += nofmult
# MULTILIB_EXCEPTIONS += *mthumb*/*mcpu=arm7*
# # Note: the multilib_exceptions matches both -mthumb and
# # -mthumb-interwork
# #
# # We have to match all the arm cpu variants which do not have the
# # multiply instruction and treat them as if the user had specified
# # -mcpu=arm7.  Note that in the following the ? is interpreted as
# # an = for the purposes of matching command line options.
# # FIXME: There ought to be a better way to do this.
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm7d
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm7di
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm70
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm700
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm700i
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm710
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm710c
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm7100
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm7500
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm7500fe
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm6
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm60
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm600
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm610
# MULTILIB_MATCHES    += mcpu?arm7=mcpu?arm620

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