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# Copyright (C) 2018 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.
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
end
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
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
end
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