offlineasm/backends.rb

   1 # Copyright (C) 2011 Apple Inc. All rights reserved.
   2 #
   3 # Redistribution and use in source and binary forms, with or without
   4 # modification, are permitted provided that the following conditions
   5 # are met:
   6 # 1. Redistributions of source code must retain the above copyright
   7 #    notice, this list of conditions and the following disclaimer.
   8 # 2. Redistributions in binary form must reproduce the above copyright
   9 #    notice, this list of conditions and the following disclaimer in the
  10 #    documentation and/or other materials provided with the distribution.
  11 #
  12 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  13 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  14 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  15 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  16 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  17 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  18 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  19 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  20 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  21 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  22 # THE POSSIBILITY OF SUCH DAMAGE.
  23
  24 require "config"
  25 require "arm"
  26 require "arm64"
  27 require "ast"
  28 require "x86"
  29 require "mips"
  30 require "sh4"
  31 require "cloop"
  32
  33 BACKENDS =
  34     [
  35      "X86",
  36      "X86_WIN",
  37      "X86_64",
  38      "X86_64_WIN",
  39      "ARM",
  40      "ARMv7",
  41      "ARMv7_TRADITIONAL",
  42      "ARM64",
  43      "MIPS",
  44      "SH4",
  45      "C_LOOP"
  46     ]
  47
  48 # Keep the set of working backends separate from the set of backends that might be
  49 # supported. This is great because the BACKENDS list is almost like a reserved
  50 # words list, in that it causes settings resolution to treat those words specially.
  51 # Hence this lets us set aside the name of a backend we might want to support in
  52 # the future while not actually supporting the backend yet.
  53 WORKING_BACKENDS =
  54     [
  55      "X86",
  56      "X86_WIN",
  57      "X86_64",
  58      "X86_64_WIN",
  59      "ARM",
  60      "ARMv7",
  61      "ARMv7_TRADITIONAL",
  62      "ARM64",
  63      "MIPS",
  64      "SH4",
  65      "C_LOOP"
  66     ]
  67
  68 BACKEND_PATTERN = Regexp.new('\\A(' + BACKENDS.join(')|(') + ')\\Z')
  69
  70 $allBackends = {}
  71 $validBackends = {}
  72 BACKENDS.each {
  73     | backend |
  74     $validBackends[backend] = true
  75     $allBackends[backend] = true
  76 }
  77
  78 def includeOnlyBackends(list)
  79     newValidBackends = {}
  80     list.each {
  81         | backend |
  82         if $validBackends[backend]
  83             newValidBackends[backend] = true
  84         end
  85     }
  86     $validBackends = newValidBackends
  87 end
  88
  89 def isBackend?(backend)
  90     $allBackends[backend]
  91 end
  92
  93 def isValidBackend?(backend)
  94     $validBackends[backend]
  95 end
  96
  97 def validBackends
  98     $validBackends.keys
  99 end
 100
 101 class Node
 102     def lower(name)
 103         begin
 104             $activeBackend = name
 105             send("lower" + name)
 106         rescue => e
 107             e.message << "At #{codeOriginString}"
 108             raise e
 109         end
 110     end
 111 end
 112
 113 # Overrides for lower() for those nodes that are backend-agnostic
 114
 115 class Label
 116     def lower(name)
 117         $asm.putsLabel(self.name[1..-1], @global)
 118     end
 119 end
 120
 121 class LocalLabel
 122     def lower(name)
 123         $asm.putsLocalLabel "_offlineasm_#{self.name[1..-1]}"
 124     end
 125 end
 126
 127 class LabelReference
 128     def asmLabel
 129         if extern?
 130             Assembler.externLabelReference(name[1..-1])
 131         else
 132             Assembler.labelReference(name[1..-1])
 133         end
 134     end
 135
 136     def cLabel
 137         Assembler.cLabelReference(name[1..-1])
 138     end
 139 end
 140
 141 class LocalLabelReference
 142     def asmLabel
 143         Assembler.localLabelReference("_offlineasm_"+name[1..-1])
 144     end
 145
 146     def cLabel
 147         Assembler.cLocalLabelReference("_offlineasm_"+name[1..-1])
 148     end
 149 end
 150
 151 class Skip
 152     def lower(name)
 153     end
 154 end
 155
 156 class Sequence
 157     def lower(name)
 158         $activeBackend = name
 159         if respond_to? "getModifiedList#{name}"
 160             newList = send("getModifiedList#{name}")
 161             newList.each {
 162                 | node |
 163                 node.lower(name)
 164             }
 165         elsif respond_to? "lower#{name}"
 166             send("lower#{name}")
 167         else
 168             @list.each {
 169                 | node |
 170                 node.lower(name)
 171             }
 172         end
 173     end
 174 end
 175