gcc/config/riscv/multilib-generator

   1 #!/usr/bin/env python
   2
   3 # RISC-V multilib list generator.
   4 # Copyright (C) 2011-2021 Free Software Foundation, Inc.
   5 # Contributed by Andrew Waterman (andrew@sifive.com).
   6 #
   7 # This file is part of GCC.
   8 #
   9 # GCC is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3, or (at your option)
  12 # any later version.
  13 #
  14 # GCC is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with GCC; see the file COPYING3.  If not see
  21 # <http://www.gnu.org/licenses/>.
  22
  23 # Each argument to this script is of the form
  24 #  <primary arch>-<abi>-<additional arches>-<extensions>
  25 # Example 1:
  26 #  rv32imafd-ilp32d-rv32g-c,v
  27 # means that, in addition to rv32imafd, these configurations can also use the
  28 # rv32imafd-ilp32d libraries: rv32imafdc, rv32imafdv, rv32g, rv32gc, rv32gv
  29 #
  30 # Example 2:
  31 #  rv32imafd-ilp32d--c*b
  32 # means that, in addition to rv32imafd, these configurations can also use the
  33 # rv32imafd-ilp32d libraries: rv32imafdc-ilp32d, rv32imafdb-ilp32d,
  34 #                             rv32imafdcb-ilp32d
  35
  36 from __future__ import print_function
  37 import sys
  38 import os
  39 import collections
  40 import itertools
  41 from functools import reduce
  42 import subprocess
  43 import argparse
  44
  45 #
  46 # TODO: Add test for this script.
  47 #
  48
  49 arches = collections.OrderedDict()
  50 abis = collections.OrderedDict()
  51 required = []
  52 reuse = []
  53
  54 def arch_canonicalize(arch):
  55   this_file = os.path.abspath(os.path.join( __file__))
  56   arch_can_script = \
  57     os.path.join(os.path.dirname(this_file), "arch-canonicalize")
  58   proc = subprocess.Popen([sys.executable, arch_can_script, arch],
  59                           stdout=subprocess.PIPE)
  60   out, err = proc.communicate()
  61   return out.decode().strip()
  62
  63 #
  64 # Handle expansion operation.
  65 #
  66 # e.g. "a*b" -> [("a",), ("b",), ("a", "b")]
  67 #      "a"   -> [("a",)]
  68 #
  69 def _expand_combination(ext):
  70   exts = list(ext.split("*"))
  71
  72   # Add underline to every extension.
  73   # e.g.
  74   #  _b * zvamo => _b * _zvamo
  75   exts = list(map(lambda x: '_' + x, exts))
  76
  77   # No need to expand if there is no `*`.
  78   if len(exts) == 1:
  79     return [(exts[0],)]
  80
  81   # Generate combination!
  82   ext_combs = []
  83   for comb_len in range(1, len(exts)+1):
  84     for ext_comb in itertools.combinations(exts, comb_len):
  85       ext_combs.append(ext_comb)
  86
  87   return ext_combs
  88
  89 #
  90 # Input a list and drop duplicated entry.
  91 # e.g.
  92 #   ["a", "b", "ab", "a"] -> ["a", "b", "ab"]
  93 #
  94 def unique(x):
  95   #
  96   # Drop duplicated entry.
  97   # Convert list to set and then convert back to list.
  98   #
  99   # Add sorted to prevent non-deterministic results in different env.
 100   #
 101   return list(sorted(list(set(x))))
 102
 103 #
 104 # Expand EXT string if there is any expansion operator (*).
 105 # e.g.
 106 #   "a*b,c" -> ["a", "b", "ab", "c"]
 107 #
 108 def expand_combination(ext):
 109   ext = list(filter(None, ext.split(',')))
 110
 111   # Expand combination for EXT, got lots of list.
 112   # e.g.
 113   #   a * b => [[("a",), ("b",)], [("a", "b")]]
 114   ext_combs = list(map(_expand_combination, ext))
 115
 116   # Then fold to single list.
 117   # e.g.
 118   #   [[("a",), ("b",)], [("a", "b")]] => [("a",), ("b",), ("a", "b")]
 119   ext = list(reduce(lambda x, y: x + y, ext_combs, []))
 120
 121   # Fold the tuple to string.
 122   # e.g.
 123   #   [("a",), ("b",), ("a", "b")] => ["a", "b", "ab"]
 124   ext = map(lambda e : reduce(lambda x, y: x + y, e), ext)
 125
 126   # Drop duplicated entry.
 127   ext = unique(ext)
 128
 129   return ext
 130
 131 multilib_cfgs = filter(lambda x:not x.startswith("--"), sys.argv[1:])
 132 options = filter(lambda x:x.startswith("--"), sys.argv[1:])
 133
 134 parser = argparse.ArgumentParser()
 135 parser.add_argument("--cmodel", type=str)
 136 parser.add_argument("cfgs", type=str, nargs='*')
 137 args = parser.parse_args()
 138
 139 if args.cmodel:
 140   cmodels = [None] + args.cmodel.split(",")
 141 else:
 142   cmodels = [None]
 143
 144 cmodel_options = '/'.join(['mcmodel=%s' % x for x in cmodels[1:]])
 145 cmodel_dirnames = ' \\\n'.join(cmodels[1:])
 146
 147 for cmodel in cmodels:
 148   for cfg in args.cfgs:
 149     try:
 150       (arch, abi, extra, ext) = cfg.split('-')
 151     except:
 152       print ("Invalid configure string %s, <arch>-<abi>-<extra>-<extensions>\n"
 153              "<extra> and <extensions> can be empty, "
 154              "e.g. rv32imafd-ilp32--" % cfg)
 155       sys.exit(1)
 156
 157     # Compact code model only support rv64.
 158     if cmodel == "compact" and arch.startswith("rv32"):
 159       continue
 160
 161     arch = arch_canonicalize (arch)
 162     arches[arch] = 1
 163     abis[abi] = 1
 164     extra = list(filter(None, extra.split(',')))
 165     ext_combs = expand_combination(ext)
 166     alts = sum([[x] + [x + y for y in ext_combs] for x in [arch] + extra], [])
 167     alts = list(map(arch_canonicalize, alts))
 168
 169     # Drop duplicated entry.
 170     alts = unique(alts)
 171
 172     for alt in alts[1:]:
 173       if alt == arch:
 174         continue
 175       arches[alt] = 1
 176       reuse.append('march.%s/mabi.%s=march.%s/mabi.%s' % (arch, abi, alt, abi))
 177
 178     if cmodel:
 179       required.append('march=%s/mabi=%s/mcmodel=%s' % (arch, abi, cmodel))
 180     else:
 181       required.append('march=%s/mabi=%s' % (arch, abi))
 182
 183   arch_options = '/'.join(['march=%s' % x for x in arches.keys()])
 184   arch_dirnames = ' \\\n'.join(arches.keys())
 185
 186   abi_options = '/'.join(['mabi=%s' % x for x in abis.keys()])
 187   abi_dirnames = ' \\\n'.join(abis.keys())
 188
 189 prog = sys.argv[0].split('/')[-1]
 190 print('# This file was generated by %s with the command:' % prog)
 191 print('#  %s' % ' '.join(sys.argv))
 192
 193 print('MULTILIB_OPTIONS = %s %s %s' % (arch_options, abi_options, cmodel_options))
 194 print('MULTILIB_DIRNAMES = %s %s %s' % (arch_dirnames, abi_dirnames, cmodel_dirnames))
 195 print('MULTILIB_REQUIRED = %s' % ' \\\n'.join(required))
 196 print('MULTILIB_REUSE = %s' % ' \\\n'.join(reuse))