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 "armv7"
  25 require "ast"
  26 require "x86"
  27
  28 BACKENDS =
  29     [
  30      "X86",
  31      "X86_64",
  32      "ARMv7"
  33     ]
  34
  35 # Keep the set of working backends separate from the set of backends that might be
  36 # supported. This is great because the BACKENDS list is almost like a reserved
  37 # words list, in that it causes settings resolution to treat those words specially.
  38 # Hence this lets us set aside the name of a backend we might want to support in
  39 # the future while not actually supporting the backend yet.
  40 WORKING_BACKENDS =
  41     [
  42      "X86",
  43      "X86_64",
  44      "ARMv7"
  45     ]
  46
  47 BACKEND_PATTERN = Regexp.new('\\A(' + BACKENDS.join(')|(') + ')\\Z')
  48
  49 class Node
  50     def lower(name)
  51         begin
  52             $activeBackend = name
  53             send("lower" + name)
  54         rescue => e
  55             raise "Got error #{e} at #{codeOriginString}"
  56         end
  57     end
  58 end
  59
  60 # Overrides for lower() for those nodes that are backend-agnostic
  61
  62 class Label
  63     def lower(name)
  64         $asm.putsLabel(self.name[1..-1])
  65     end
  66 end
  67
  68 class LocalLabel
  69     def lower(name)
  70         $asm.putsLocalLabel "_offlineasm_#{self.name[1..-1]}"
  71     end
  72 end
  73
  74 class LabelReference
  75     def asmLabel
  76         Assembler.labelReference(name[1..-1])
  77     end
  78 end
  79
  80 class LocalLabelReference
  81     def asmLabel
  82         Assembler.localLabelReference("_offlineasm_"+name[1..-1])
  83     end
  84 end
  85
  86 class Skip
  87     def lower(name)
  88     end
  89 end
  90
  91 class Sequence
  92     def lower(name)
  93         $activeBackend = name
  94         if respond_to? "getModifiedList#{name}"
  95             newList = send("getModifiedList#{name}")
  96             newList.each {
  97                 | node |
  98                 node.lower(name)
  99             }
 100         elsif respond_to? "lower#{name}"
 101             send("lower#{name}")
 102         else
 103             @list.each {
 104                 | node |
 105                 node.lower(name)
 106             }
 107         end
 108     end
 109 end
 110