JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / offlineasm / asm.rb

diff --git a/offlineasm/asm.rb b/offlineasm/asm.rb
new file mode 100644 (file)
index 0000000..12bade0
--- /dev/null
+++ b/offlineasm/asm.rb
@@ -0,0 +1,181 @@
+#!/usr/bin/env ruby
+
+# Copyright (C) 2011 Apple Inc. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+# THE POSSIBILITY OF SUCH DAMAGE.
+
+$: << File.dirname(__FILE__)
+
+require "backends"
+require "digest/sha1"
+require "offsets"
+require "parser"
+require "self_hash"
+require "settings"
+require "transform"
+
+class Assembler
+    def initialize(outp)
+        @outp = outp
+        @state = :cpp
+        @commentState = :none
+        @comment = nil
+    end
+    
+    def enterAsm
+        @outp.puts "asm ("
+        @state = :asm
+    end
+    
+    def leaveAsm
+        putsLastComment
+        @outp.puts ");"
+        @state = :cpp
+    end
+    
+    def inAsm
+        enterAsm
+        yield
+        leaveAsm
+    end
+    
+    def lastComment
+        if @comment
+            result = "// #{@comment}"
+        else
+            result = ""
+        end
+        @commentState = :none
+        @comment = nil
+        result
+    end
+    
+    def putsLastComment
+        comment = lastComment
+        unless comment.empty?
+            @outp.puts comment
+        end
+    end
+    
+    def puts(*line)
+        raise unless @state == :asm
+        @outp.puts("\"\\t" + line.join('') + "\\n\" #{lastComment}")
+    end
+    
+    def print(line)
+        raise unless @state == :asm
+        @outp.print("\"" + line + "\"")
+    end
+    
+    def putsLabel(labelName)
+        raise unless @state == :asm
+        @outp.puts("OFFLINE_ASM_GLOBAL_LABEL(#{labelName}) #{lastComment}")
+    end
+    
+    def putsLocalLabel(labelName)
+        raise unless @state == :asm
+        @outp.puts("LOCAL_LABEL_STRING(#{labelName}) \":\\n\" #{lastComment}")
+    end
+    
+    def self.labelReference(labelName)
+        "\" SYMBOL_STRING(#{labelName}) \""
+    end
+    
+    def self.localLabelReference(labelName)
+        "\" LOCAL_LABEL_STRING(#{labelName}) \""
+    end
+    
+    def comment(text)
+        case @commentState
+        when :none
+            @comment = text
+            @commentState = :one
+        when :one
+            @outp.puts "// #{@comment}"
+            @outp.puts "// #{text}"
+            @comment = nil
+            @commentState = :many
+        when :many
+            @outp.puts "// #{text}"
+        else
+            raise
+        end
+    end
+end
+
+asmFile = ARGV.shift
+offsetsFile = ARGV.shift
+outputFlnm = ARGV.shift
+
+$stderr.puts "offlineasm: Parsing #{asmFile} and #{offsetsFile} and creating assembly file #{outputFlnm}."
+
+begin
+    configurationList = offsetsAndConfigurationIndex(offsetsFile)
+rescue MissingMagicValuesException
+    $stderr.puts "offlineasm: No magic values found. Skipping assembly file generation assuming the classic interpreter is enabled."
+    exit 0
+end
+
+inputHash =
+    "// offlineasm input hash: " + parseHash(asmFile) +
+    " " + Digest::SHA1.hexdigest(configurationList.map{|v| (v[0] + [v[1]]).join(' ')}.join(' ')) +
+    " " + selfHash
+
+if FileTest.exist? outputFlnm
+    File.open(outputFlnm, "r") {
+        | inp |
+        firstLine = inp.gets
+        if firstLine and firstLine.chomp == inputHash
+            $stderr.puts "offlineasm: Nothing changed."
+            exit 0
+        end
+    }
+end
+
+File.open(outputFlnm, "w") {
+    | outp |
+    $output = outp
+    $output.puts inputHash
+    
+    $asm = Assembler.new($output)
+    
+    ast = parse(asmFile)
+    
+    configurationList.each {
+        | configuration |
+        offsetsList = configuration[0]
+        configIndex = configuration[1]
+        forSettings(computeSettingsCombinations(ast)[configIndex], ast) {
+            | concreteSettings, lowLevelAST, backend |
+            lowLevelAST = lowLevelAST.resolve(*buildOffsetsMap(lowLevelAST, offsetsList))
+            lowLevelAST.validate
+            emitCodeInConfiguration(concreteSettings, lowLevelAST, backend) {
+                $asm.inAsm {
+                    lowLevelAST.lower(backend)
+                }
+            }
+        }
+    }
+}
+
+$stderr.puts "offlineasm: Assembly file #{outputFlnm} successfully generated."
+