diff options
Diffstat (limited to 'Source/JavaScriptCore/offlineasm/parser.rb')
| -rw-r--r-- | Source/JavaScriptCore/offlineasm/parser.rb | 102 |
1 files changed, 82 insertions, 20 deletions
diff --git a/Source/JavaScriptCore/offlineasm/parser.rb b/Source/JavaScriptCore/offlineasm/parser.rb index f0e4b0045..11863c724 100644 --- a/Source/JavaScriptCore/offlineasm/parser.rb +++ b/Source/JavaScriptCore/offlineasm/parser.rb @@ -23,7 +23,22 @@ require "ast" require "instructions" +require "pathname" require "registers" +require "self_hash" + +class CodeOrigin + attr_reader :fileName, :lineNumber + + def initialize(fileName, lineNumber) + @fileName = fileName + @lineNumber = lineNumber + end + + def to_s + "#{fileName}:#{lineNumber}" + end +end class Token attr_reader :codeOrigin, :string @@ -46,7 +61,7 @@ class Token end def to_s - "#{@string.inspect} at line #{codeOrigin}" + "#{@string.inspect} at #{codeOrigin}" end def parseError(*comment) @@ -62,7 +77,8 @@ end # The lexer. Takes a string and returns an array of tokens. # -def lex(str) +def lex(str, fileName) + fileName = Pathname.new(fileName) result = [] lineNumber = 1 while not str.empty? @@ -70,28 +86,28 @@ def lex(str) when /\A\#([^\n]*)/ # comment, ignore when /\A\n/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) lineNumber += 1 when /\A[a-zA-Z]([a-zA-Z0-9_]*)/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) when /\A\.([a-zA-Z0-9_]*)/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) when /\A_([a-zA-Z0-9_]*)/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) when /\A([ \t]+)/ # whitespace, ignore when /\A0x([0-9a-fA-F]+)/ - result << Token.new(lineNumber, $&.hex.to_s) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&.hex.to_s) when /\A0([0-7]+)/ - result << Token.new(lineNumber, $&.oct.to_s) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&.oct.to_s) when /\A([0-9]+)/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) when /\A::/ - result << Token.new(lineNumber, $&) - when /\A[:,\(\)\[\]=\+\-*]/ - result << Token.new(lineNumber, $&) + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) + when /\A[:,\(\)\[\]=\+\-~\|&^*]/ + result << Token.new(CodeOrigin.new(fileName, lineNumber), $&) else - raise "Lexer error at line number #{lineNumber}, unexpected sequence #{str[0..20].inspect}" + raise "Lexer error at #{CodeOrigin.new(fileName, lineNumber).to_s}, unexpected sequence #{str[0..20].inspect}" end str = $~.post_match end @@ -111,7 +127,7 @@ def isInstruction(token) end def isKeyword(token) - token =~ /\A((true)|(false)|(if)|(then)|(else)|(elsif)|(end)|(and)|(or)|(not)|(macro)|(const)|(sizeof)|(error))\Z/ or + token =~ /\A((true)|(false)|(if)|(then)|(else)|(elsif)|(end)|(and)|(or)|(not)|(macro)|(const)|(sizeof)|(error)|(include))\Z/ or token =~ REGISTER_PATTERN or token =~ INSTRUCTION_PATTERN end @@ -142,8 +158,8 @@ end # class Parser - def initialize(tokens) - @tokens = tokens + def initialize(data, fileName) + @tokens = lex(data, fileName) @idx = 0 end @@ -306,6 +322,9 @@ class Parser if @tokens[@idx] == "-" @idx += 1 NegImmediate.new(@tokens[@idx - 1].codeOrigin, parseExpressionAtom) + elsif @tokens[@idx] == "~" + @idx += 1 + BitnotImmediate.new(@tokens[@idx - 1].codeOrigin, parseExpressionAtom) elsif @tokens[@idx] == "(" @idx += 1 result = parseExpression @@ -349,10 +368,10 @@ class Parser end def couldBeExpression - @tokens[@idx] == "-" or @tokens[@idx] == "sizeof" or isInteger(@tokens[@idx]) or isVariable(@tokens[@idx]) or @tokens[@idx] == "(" + @tokens[@idx] == "-" or @tokens[@idx] == "~" or @tokens[@idx] == "sizeof" or isInteger(@tokens[@idx]) or isVariable(@tokens[@idx]) or @tokens[@idx] == "(" end - def parseExpression + def parseExpressionAdd skipNewLine result = parseExpressionMul while @tokens[@idx] == "+" or @tokens[@idx] == "-" @@ -369,6 +388,33 @@ class Parser result end + def parseExpressionAnd + skipNewLine + result = parseExpressionAdd + while @tokens[@idx] == "&" + @idx += 1 + result = AndImmediates.new(@tokens[@idx - 1].codeOrigin, result, parseExpressionAdd) + end + result + end + + def parseExpression + skipNewLine + result = parseExpressionAnd + while @tokens[@idx] == "|" or @tokens[@idx] == "^" + if @tokens[@idx] == "|" + @idx += 1 + result = OrImmediates.new(@tokens[@idx - 1].codeOrigin, result, parseExpressionAnd) + elsif @tokens[@idx] == "^" + @idx += 1 + result = XorImmediates.new(@tokens[@idx - 1].codeOrigin, result, parseExpressionAnd) + else + raise + end + end + result + end + def parseOperand(comment) skipNewLine if couldBeExpression @@ -571,6 +617,14 @@ class Parser list << LocalLabel.forName(codeOrigin, name) end @idx += 1 + elsif @tokens[@idx] == "include" + @idx += 1 + parseError unless isIdentifier(@tokens[@idx]) + moduleName = @tokens[@idx].string + fileName = @tokens[@idx].codeOrigin.fileName.dirname + (moduleName + ".asm") + @idx += 1 + $stderr.puts "offlineasm: Including file #{fileName}" + list << parse(fileName) else parseError "Expecting terminal #{final} #{comment}" end @@ -579,8 +633,16 @@ class Parser end end -def parse(tokens) - parser = Parser.new(tokens) +def parseData(data, fileName) + parser = Parser.new(data, fileName) parser.parseSequence(nil, "") end +def parse(fileName) + parseData(IO::read(fileName), fileName) +end + +def parseHash(fileName) + dirHash(Pathname.new(fileName).dirname, /\.asm$/) +end + |