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 "arm64"
  26 require "arm"
  27 require "arm64"
  28 require "ast"
  29 require "x86"
  30 require "mips"
  31 require "sh4"
  32 require "cloop"
  33
  34 BACKENDS =
  35     [
  36      "X86",
  37      "X86_64",
  38      "ARM",
  39      "ARMv7",
  40      "ARMv7_TRADITIONAL",
  41      "ARM64",
  42      "MIPS",
  43      "SH4",
  44      "C_LOOP"
  45     ]
  46
  47 # Keep the set of working backends separate from the set of backends that might be
  48 # supported. This is great because the BACKENDS list is almost like a reserved
  49 # words list, in that it causes settings resolution to treat those words specially.
  50 # Hence this lets us set aside the name of a backend we might want to support in
  51 # the future while not actually supporting the backend yet.
  52 WORKING_BACKENDS =
  53     [
  54      "X86",
  55      "X86_64",
  56      "ARM",
  57      "ARMv7",
  58      "ARMv7_TRADITIONAL",
  59      "ARM64",
  60      "MIPS",
  61      "SH4",
  62      "C_LOOP"
  63     ]
  64
  65 BACKEND_PATTERN = Regexp.new('\\A(' + BACKENDS.join(')|(') + ')\\Z')
  66
  67 class Node
  68     def lower(name)
  69         begin
  70             $activeBackend = name
  71             send("lower" + name)
  72         rescue => e
  73             e.message << "At #{codeOriginString}"
  74             raise e
  75         end
  76     end
  77 end
  78
  79 # Overrides for lower() for those nodes that are backend-agnostic
  80
  81 class Label
  82     def lower(name)
  83         $asm.putsLabel(self.name[1..-1])
  84     end
  85 end
  86
  87 class LocalLabel
  88     def lower(name)
  89         $asm.putsLocalLabel "_offlineasm_#{self.name[1..-1]}"
  90     end
  91 end
  92
  93 class LabelReference
  94     def asmLabel
  95         Assembler.labelReference(name[1..-1])
  96     end
  97     def cLabel
  98         Assembler.cLabelReference(name[1..-1])
  99     end
 100 end
 101
 102 class LocalLabelReference
 103     def asmLabel
 104         Assembler.localLabelReference("_offlineasm_"+name[1..-1])
 105     end
 106     def cLabel
 107         Assembler.cLocalLabelReference("_offlineasm_"+name[1..-1])
 108     end
 109 end
 110
 111 class Skip
 112     def lower(name)
 113     end
 114 end
 115
 116 class Sequence
 117     def lower(name)
 118         $activeBackend = name
 119         if respond_to? "getModifiedList#{name}"
 120             newList = send("getModifiedList#{name}")
 121             newList.each {
 122                 | node |
 123                 node.lower(name)
 124             }
 125         elsif respond_to? "lower#{name}"
 126             send("lower#{name}")
 127         else
 128             @list.each {
 129                 | node |
 130                 node.lower(name)
 131             }
 132         end
 133     end
 134 end
 135