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
  44 #
  45 # TODO: Add test for this script.
  46 #
  47
  48 arches = collections.OrderedDict()
  49 abis = collections.OrderedDict()
  50 required = []
  51 reuse = []
  52
  53 def arch_canonicalize(arch):
  54   this_file = os.path.abspath(os.path.join( __file__))
  55   arch_can_script = \
  56     os.path.join(os.path.dirname(this_file), "arch-canonicalize")
  57   proc = subprocess.Popen([sys.executable, arch_can_script, arch],
  58                           stdout=subprocess.PIPE)
  59   out, err = proc.communicate()
  60   return out.decode().strip()
  61
  62 #
  63 # Handle expansion operation.
  64 #
  65 # e.g. "a*b" -> [("a",), ("b",), ("a", "b")]
  66 #      "a"   -> [("a",)]
  67 #
  68 def _expand_combination(ext):
  69   exts = list(ext.split("*"))
  70
  71   # No need to expand if there is no `*`.
  72   if len(exts) == 1:
  73     return [(exts[0],)]
  74
  75   # Add underline to every extension.
  76   # e.g.
  77   #  _b * zvamo => _b * _zvamo
  78   exts = list(map(lambda x: '_' + x, exts))
  79
  80   # Generate combination!
  81   ext_combs = []
  82   for comb_len in range(1, len(exts)+1):
  83     for ext_comb in itertools.combinations(exts, comb_len):
  84       ext_combs.append(ext_comb)
  85
  86   return ext_combs
  87
  88 #
  89 # Input a list and drop duplicated entry.
  90 # e.g.
  91 #   ["a", "b", "ab", "a"] -> ["a", "b", "ab"]
  92 #
  93 def unique(x):
  94   #
  95   # Drop duplicated entry.
  96   # Convert list to set and then convert back to list.
  97   #
  98   # Add sorted to prevent non-deterministic results in different env.
  99   #
 100   return list(sorted(list(set(x))))
 101
 102 #
 103 # Expand EXT string if there is any expansion operator (*).
 104 # e.g.
 105 #   "a*b,c" -> ["a", "b", "ab", "c"]
 106 #
 107 def expand_combination(ext):
 108   ext = list(filter(None, ext.split(',')))
 109
 110   # Expand combination for EXT, got lots of list.
 111   # e.g.
 112   #   a * b => [[("a",), ("b",)], [("a", "b")]]
 113   ext_combs = list(map(_expand_combination, ext))
 114
 115   # Then fold to single list.
 116   # e.g.
 117   #   [[("a",), ("b",)], [("a", "b")]] => [("a",), ("b",), ("a", "b")]
 118   ext = list(reduce(lambda x, y: x + y, ext_combs, []))
 119
 120   # Fold the tuple to string.
 121   # e.g.
 122   #   [("a",), ("b",), ("a", "b")] => ["a", "b", "ab"]
 123   ext = map(lambda e : reduce(lambda x, y: x + y, e), ext)
 124
 125   # Drop duplicated entry.
 126   ext = unique(ext)
 127
 128   return ext
 129
 130 for cfg in sys.argv[1:]:
 131   try:
 132     (arch, abi, extra, ext) = cfg.split('-')
 133   except:
 134     print ("Invalid configure string %s, <arch>-<abi>-<extra>-<extensions>\n"
 135            "<extra> and <extensions> can be empty, "
 136            "e.g. rv32imafd-ilp32--" % cfg)
 137     sys.exit(1)
 138
 139   arch = arch_canonicalize (arch)
 140   arches[arch] = 1
 141   abis[abi] = 1
 142   extra = list(filter(None, extra.split(',')))
 143   ext_combs = expand_combination(ext)
 144   alts = sum([[x] + [x + y for y in ext_combs] for x in [arch] + extra], [])
 145   alts = list(map(arch_canonicalize, alts))
 146
 147   # Drop duplicated entry.
 148   alts = unique(alts)
 149
 150   for alt in alts[1:]:
 151     arches[alt] = 1
 152     reuse.append('march.%s/mabi.%s=march.%s/mabi.%s' % (arch, abi, alt, abi))
 153   required.append('march=%s/mabi=%s' % (arch, abi))
 154
 155 arch_options = '/'.join(['march=%s' % x for x in arches.keys()])
 156 arch_dirnames = ' \\\n'.join(arches.keys())
 157
 158 abi_options = '/'.join(['mabi=%s' % x for x in abis.keys()])
 159 abi_dirnames = ' \\\n'.join(abis.keys())
 160
 161 prog = sys.argv[0].split('/')[-1]
 162 print('# This file was generated by %s with the command:' % prog)
 163 print('#  %s' % ' '.join(sys.argv))
 164
 165 print('MULTILIB_OPTIONS = %s %s' % (arch_options, abi_options))
 166 print('MULTILIB_DIRNAMES = %s %s' % (arch_dirnames, abi_dirnames))
 167 print('MULTILIB_REQUIRED = %s' % ' \\\n'.join(required))
 168 print('MULTILIB_REUSE = %s' % ' \\\n'.join(reuse))