WebKit/Source/JavaScriptCore/generator/Section.rb at main · WebKit/WebKit · GitHub

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# 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.

require 'stringio'

require_relative 'Opcode'

require_relative 'OpcodeGroup'

class Section

attr_reader :name

attr_reader :config

attr_reader :opcodes

def initialize(name, config)

@name = name

@config = config

@opcodes = []

@opcode_groups = []

end

def add_opcode(name, config)

@opcodes << create_opcode(name, config)

end

def create_opcode(name, config)

Opcode.new(self, name, config[:extras], config[:args], config[:metadata], config[:metadata_initializers], config[:tmps], config[:checkpoints])

end

def add_opcode_group(name, opcodes, config)

opcodes = opcodes.map { |opcode| create_opcode(opcode, config) }

@opcode_groups << OpcodeGroup.new(self, name, opcodes, config)

@opcodes += opcodes

end

def sort!

@opcodes = @opcodes.sort { |a, b|

result = nil

if a.checkpoints or b.checkpoints

raise "Bytecodes with checkpoints should have metadata: #{a.name}" if a.checkpoints and a.metadata.empty?

raise "Bytecodes with checkpoints should have metadata: #{b.name}" if b.checkpoints and b.metadata.empty?

result = a.checkpoints ? b.checkpoints ? 0 : -1 : 1

# SIMD opcodes should always use higher bytecode ids since they are more rare.

elsif a.name.downcase.include?("simd") or b.name.downcase.include?("simd")

result = a.name.include?("simd") ? b.name.include?("simd") ? 0 : 1 : -1

else

result = a.metadata.empty? ? b.metadata.empty? ? 0 : 1 : -1

end

result

}

end

def validate

first_non_checkpoint = nil

first_non_metadata = nil

last_simd = nil

# validate that opcodes are ordered as

# [opcodes_with_checkpoint] ++ [opcodes_with_metadata] ++ [non_simd_opcodes] ++ [simd_opcodes]

@opcodes.each do |opcode|

if opcode.checkpoints.nil?

first_non_checkpoint ||= opcode

elsif first_non_checkpoint

assert("invalid order of bytecodes in section '#{name}': found opcode '#{opcode.name}' with checkpoints after '#{first_non_checkpoint.name}', which doesn't contain checkpoints") { false }

end

if opcode.metadata.empty?

first_non_metadata ||= opcode

elsif first_non_metadata

assert("invalid order of bytecodes in section '#{name}': found opcode '#{opcode.name}' with metadata after '#{first_non_metadata.name}', which doesn't contain metadata") { false }

end

if opcode.name.downcase.include?("simd")

last_simd = opcode

elsif last_simd

assert("invalid order of bytecodes in section '#{name}': found non-simd opcode '#{opcode.name}' after '#{last_simd.name}'") { false }

end

def create_ids!

@opcodes.each(&:create_id!)

end

def is_wasm?

@name == :Wasm

end

def header_helpers(num_opcodes)

out = StringIO.new

if config[:emit_in_h_file]

out.write("#define FOR_EACH_#{config[:macro_name_component]}_ID(macro) \\\n")

opcodes.each { |opcode| out.write(" macro(#{opcode.name}, #{opcode.length}) \\\n") }

out << "\n"

out.write("#define NUMBER_OF_#{config[:macro_name_component]}_IDS #{opcodes.length}\n")

out.write("#define MAX_LENGTH_OF_#{config[:macro_name_component]}_IDS #{(opcodes.max {|a, b| a.length <=> b.length }).length}\n")

end

if config[:emit_in_structs_file]

i = 0

out.write("static constexpr unsigned #{config[:macro_name_component].downcase}CheckpointCountTable[] = {\n")

while true

if !opcodes[i].checkpoints

out << "};\n\n"

out << "#define NUMBER_OF_#{config[:macro_name_component]}_WITH_CHECKPOINTS #{i}\n"

break

end

out.write(" #{opcodes[i].checkpoints.length},\n")

i += 1

end

out << "\n"

out.write("#define FOR_EACH_#{config[:macro_name_component]}_METADATA_SIZE(macro) \\\n")

i = 0

while true

if opcodes[i].metadata.empty?

out << "\n"

out << "#define NUMBER_OF_#{config[:macro_name_component]}_WITH_METADATA #{i}\n"

break

end

out.write(" macro(sizeof(#{opcodes[i].capitalized_name}::Metadata))\\\n")

i += 1

end

out << "\n"

out.write("#define FOR_EACH_#{config[:macro_name_component]}_METADATA_ALIGNMENT(macro) \\\n")

i = 0

while true

if opcodes[i].metadata.empty?

out << "\n"

break

end

out.write(" macro(alignof(#{opcodes[i].capitalized_name}::Metadata))\\\n")

i += 1

end

if config[:emit_opcode_id_string_values_in_h_file]

opcodes.each { |opcode|

out.write("#define #{opcode.name}_value_string \"#{opcode.id}\"\n")

}

opcodes.each { |opcode|

out.write("#define #{opcode.name}_wide16_value_string \"#{num_opcodes + opcode.id}\"\n")

}

opcodes.each { |opcode|

out.write("#define #{opcode.name}_wide32_value_string \"#{num_opcodes * 2 + opcode.id}\"\n")

}

end

out.string

end

def for_each_struct

<<-EOF

#define FOR_EACH_#{config[:macro_name_component]}_STRUCT(macro) \\

#{opcodes.map do |op|

" macro(#{op.capitalized_name}) \\"

end.join("\n")}

EOF

end

WebKit/Source/JavaScriptCore/generator/Section.rb at main · WebKit/WebKit · GitHub

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