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# Copyright (C) 2011-2014 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/>.
##################################################################
#
# Transform Core/Device Information from avr-mcus.def to a
# Representation that is understood by GCC's multilib Machinery.
#
# The Script works as a Filter from STDIN to STDOUT.
#
# FORMAT = "Makefile": Generate Makefile Snipet that sets some
# MULTILIB_* Variables as needed.
#
##################################################################
BEGIN {
FS ="[(, \t]+"
option[""] = ""
tiny_stack[""] = 1
comment = 1
n_mcu = 0
n_cores = 0
mtiny[0] = ""
mtiny[1] = "tiny-stack"
option["tiny-stack"] = "msp8"
}
##################################################################
# Add some Comments to the generated Files and copy-paste
# Copyright Notice from above.
##################################################################
/^#/ {
if (!comment)
next
else if (comment == 1)
{
if (FORMAT == "Makefile")
{
print "# Auto-generated Makefile Snip"
print "# Generated by : ./gcc/config/avr/genmultilib.awk"
print "# Generated from : ./gcc/config/avr/avr-mcus.def"
print "# Used by : tmake_file from Makefile and genmultilib"
print ""
}
}
comment = 2;
print
}
/^$/ {
# The first empty line stops copy-pasting the GPL comments
# from this file to the generated file.
comment = 0
}
##################################################################
# Run over all AVR_MCU Lines and gather Information:
# cores[] : Enumerates the Cores (avr2, avr25, ...)
# mcu[] : Enumerates the Devices
# tiny_stack[]: Maps Core/Device to 0 (2-byte SP) or 1 (1-byte SP)
# option[] : Maps Core/Device to the mmcu= option to get it
# toCore[] : Maps Device to its Core
##################################################################
/^AVR_MCU/ {
name = $2
gsub ("\"", "", name)
if ($5 == "NULL")
{
core = name
# avr1 is supported for Assembler only: It gets no multilib
if (core == "avr1")
next
cores[n_cores] = core
n_cores++
tiny_stack[core] = 0
option[core] = "march=" core
next
}
# avr1 is supported for Assembler only: Its Devices are ignored
if (core == "avr1")
next
# split device specific feature list
n = split($4,dev_attribute,"|")
# set tiny_stack false by default
tiny_stack[name] = 0
for (i=1; i <= n; i++)
if (dev_attribute[i] == "AVR_SHORT_SP") {
tiny_stack[name] = 1
break
}
mcu[n_mcu] = name
n_mcu++
option[name] = "mmcu=" name
toCore[name] = core
if (tiny_stack[name] == 1)
tiny_stack[core] = 1
}
##################################################################
#
# We gathered all the Information, now build/output the following:
#
# awk Variable target Variable FORMAT
# -----------------------------------------------------------
# m_options <-> MULTILIB_OPTIONS Makefile
# m_dirnames <-> MULTILIB_DIRNAMES "
# m_exceptions <-> MULTILIB_EXCEPTIONS "
#
##################################################################
END {
m_options = "\nMULTILIB_OPTIONS = "
m_dirnames = "\nMULTILIB_DIRNAMES ="
m_exceptions = "\nMULTILIB_EXCEPTIONS ="
##############################################################
# Compose MULTILIB_OPTIONS. This represents the Cross-Product
# (avr2, avr25, ...) x msp8
sep = ""
for (c = 0; c < n_cores; c++)
{
m_options = m_options sep option[cores[c]]
sep = "/"
}
# The ... x msp8
m_options = m_options " " option[mtiny[1]]
##############################################################
# Map Device to its multilib
for (t = 0; t < n_mcu; t++)
{
core = toCore[mcu[t]]
line = option[core] ":" option[mcu[t]]
gsub ("=", "?", line)
gsub (":", "=", line)
}
####################################################################
# Compose MULTILIB_DIRNAMES and MULTILIB_EXEPTIONS
n_mtiny = 2
for (t = 0; t < n_mtiny; t++)
for (c = -1; c < n_cores; c++)
{
if (c == -1)
core = ""
else
core = cores[c]
# The Directory Name for this multilib
if (core != "" && mtiny[t] != "")
{
mdir = core "/" mtiny[t]
mopt = option[core] "/" option[mtiny[t]]
}
else
{
mdir = core mtiny[t]
mopt = option[core] option[mtiny[t]]
}
if (core != "" && tiny_stack[core] == 0 && mtiny[t] != "")
{
# There's not a single SP = 8 Devices for this Core:
# Don't build respective multilib
m_exceptions = m_exceptions " \\\n\t" mopt
continue
}
if (core != "avr2" || mtiny[t] == "")
m_dirnames = m_dirnames " " mdir
}
############################################################
# Output that Stuff
############################################################
if (FORMAT == "Makefile")
{
# Intended Target: ./gcc/config/avr/t-multilib
print m_options
print m_dirnames
print m_exceptions
}
}
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