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#!/usr/bin/env python
# Tool for canonical RISC-V architecture string.
# Copyright (C) 2011-2021 Free Software Foundation, Inc.
# Contributed by Andrew Waterman (andrew@sifive.com).
#
# 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/>.
from __future__ import print_function
import sys
import collections
import itertools
from functools import reduce
CANONICAL_ORDER = "mafdgqlcbjtpvn"
LONG_EXT_PREFIXES = ['z', 's', 'h', 'x']
#
# IMPLIED_EXT(ext) -> implied extension list.
#
IMPLIED_EXT = {
"d" : ["f"],
}
def arch_canonicalize(arch):
# TODO: Support extension version.
new_arch = ""
if arch[:5] in ['rv32e', 'rv32i', 'rv32g', 'rv64i', 'rv64g']:
# TODO: We should expand g to imad_zifencei once we support newer spec.
new_arch = arch[:5].replace("g", "imafd")
else:
raise Exception("Unexpected arch: `%s`" % arch[:5])
# Find any Z, S, H or X
long_ext_prefixes_idx = map(lambda x: arch.find(x), LONG_EXT_PREFIXES)
# Filter out any non-existent index.
long_ext_prefixes_idx = list(filter(lambda x: x != -1, long_ext_prefixes_idx))
if long_ext_prefixes_idx:
first_long_ext_idx = min(long_ext_prefixes_idx)
long_exts = arch[first_long_ext_idx:].split("_")
std_exts = list(arch[5:first_long_ext_idx])
else:
long_exts = []
std_exts = list(arch[5:])
#
# Handle implied extensions.
#
for ext in std_exts + long_exts:
if ext in IMPLIED_EXT:
implied_exts = IMPLIED_EXT[ext]
for implied_ext in implied_exts:
if implied_ext not in std_exts + long_exts:
long_exts.append(implied_ext)
# Single letter extension might appear in the long_exts list,
# becasue we just append extensions list to the arch string.
std_exts += list(filter(lambda x:len(x) == 1, long_exts))
# Multi-letter extension must be in lexicographic order.
long_exts = list(sorted(filter(lambda x:len(x) != 1, long_exts)))
# Put extensions in canonical order.
for ext in CANONICAL_ORDER:
if ext in std_exts:
new_arch += ext
# Check every extension is processed.
for ext in std_exts:
if ext == '_':
continue
if ext not in CANONICAL_ORDER:
raise Exception("Unsupported extension `%s`" % ext)
# Concat rest of the multi-char extensions.
if long_exts:
new_arch += "_" + "_".join(long_exts)
return new_arch
if len(sys.argv) < 2:
print ("Usage: %s <arch_str> [<arch_str>*]" % sys.argv)
sys.exit(1)
for arg in sys.argv[1:]:
print (arch_canonicalize(arg))
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