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 class Node
  71     def lower(name)
  72         begin
  73             $activeBackend = name
  74             send("lower" + name)
  75         rescue => e
  76             e.message << "At #{codeOriginString}"
  77             raise e
  78         end
  79     end
  80 end
  81
  82 # Overrides for lower() for those nodes that are backend-agnostic
  83
  84 class Label
  85     def lower(name)
  86         $asm.putsLabel(self.name[1..-1], @global)
  87     end
  88 end
  89
  90 class LocalLabel
  91     def lower(name)
  92         $asm.putsLocalLabel "_offlineasm_#{self.name[1..-1]}"
  93     end
  94 end
  95
  96 class LabelReference
  97     def asmLabel
  98         if extern?
  99             Assembler.externLabelReference(name[1..-1])
 100         else
 101             Assembler.labelReference(name[1..-1])
 102         end
 103     end
 104
 105     def cLabel
 106         Assembler.cLabelReference(name[1..-1])
 107     end
 108 end
 109
 110 class LocalLabelReference
 111     def asmLabel
 112         Assembler.localLabelReference("_offlineasm_"+name[1..-1])
 113     end
 114
 115     def cLabel
 116         Assembler.cLocalLabelReference("_offlineasm_"+name[1..-1])
 117     end
 118 end
 119
 120 class Skip
 121     def lower(name)
 122     end
 123 end
 124
 125 class Sequence
 126     def lower(name)
 127         $activeBackend = name
 128         if respond_to? "getModifiedList#{name}"
 129             newList = send("getModifiedList#{name}")
 130             newList.each {
 131                 | node |
 132                 node.lower(name)
 133             }
 134         elsif respond_to? "lower#{name}"
 135             send("lower#{name}")
 136         else
 137             @list.each {
 138                 | node |
 139                 node.lower(name)
 140             }
 141         end
 142     end
 143 end
 144