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#! /your/favourite/path/to/ruby
# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
# -*- frozen_string_literal: true; -*-
# -*- warn_indent: true; -*-
#
# Copyright (c) 2017 Urabe, Shyouhei. All rights reserved.
#
# This file is a part of the programming language Ruby. Permission is hereby
# granted, to either redistribute and/or modify this file, provided that the
# conditions mentioned in the file COPYING are met. Consult the file for
# details.
require_relative '../loaders/insns_def'
require_relative 'c_expr'
require_relative 'typemap'
require_relative 'attribute'
class RubyVM::BareInstructions
attr_reader :template, :name, :opes, :pops, :rets, :decls, :expr
def initialize template:, name:, location:, signature:, attributes:, expr:
@template = template
@name = name
@loc = location
@sig = signature
@expr = RubyVM::CExpr.new expr
@opes = typesplit @sig[:ope]
@pops = typesplit @sig[:pop].reject {|i| i == '...' }
@rets = typesplit @sig[:ret].reject {|i| i == '...' }
@attrs = attributes.map {|i|
RubyVM::Attribute.new insn: self, **i
}.each_with_object({}) {|a, h|
h[a.key] = a
}
@attrs_orig = @attrs.dup
end
def pretty_name
n = @sig[:name]
o = @sig[:ope].map{|i| i[/\S+$/] }.join ', '
p = @sig[:pop].map{|i| i[/\S+$/] }.join ', '
r = @sig[:ret].map{|i| i[/\S+$/] }.join ', '
return sprintf "%s(%s)(%s)(%s)", n, o, p, r
end
def bin
return "BIN(#{name})"
end
def call_attribute name
return sprintf 'CALL_ATTRIBUTE(%s)', [
name, @name, @opes.map {|i| i[:name] }
].flatten.compact.join(', ')
end
def sp_inc
return @attrs.fetch "sp_inc" do |k|
return generate_attribute k, 'rb_snum_t', rets.size - pops.size
end
end
def has_attribute? k
@attrs_orig.has_key? k
end
def attributes
# need to generate predefined attribute defaults
sp_inc
# other_attribute
# ...
return @attrs.values
end
def width
return 1 + opes.size
end
def declarations
return @variables \
. values \
. group_by {|h| h[:type] } \
. map {|t, v| [t, v.map {|i| i[:name] }.sort ] } \
. map {|t, v| sprintf("%s %s", t, v.join(', ')) } \
. sort
end
def preamble
# preamble makes sense for operand unifications
return []
end
def sc?
# sc stands for stack caching.
return false
end
def cast_to_VALUE var, expr = var[:name]
RubyVM::Typemap.typecast_to_VALUE var[:type], expr
end
def cast_from_VALUE var, expr = var[:name]
RubyVM::Typemap.typecast_from_VALUE var[:type], expr
end
def operands_info
opes.map {|o|
c, _ = RubyVM::Typemap.fetch o[:type]
next c
}.join
end
def pushs_frame?
opes.any? {|o| /CALL_INFO/ =~ o[:type] }
end
def inspect
sprintf "#<%s@%s:%d>", @name, @loc[0], @loc[1]
end
private
def generate_attribute k, t, v
attr = RubyVM::Attribute.new \
insn: self, \
name: k, \
type: t, \
location: [], \
expr: v.to_s + ';'
return @attrs[k] = attr
end
def typesplit a
@variables ||= {}
a.map do |decl|
md = %r'
(?<comment> /[*] [^*]* [*]+ (?: [^*/] [^*]* [*]+ )* / ){0}
(?<ws> \g<comment> | \s ){0}
(?<ident> [_a-zA-Z] [0-9_a-zA-Z]* ){0}
(?<type> (?: \g<ident> \g<ws>+ )* \g<ident> ){0}
(?<var> \g<ident> ){0}
\G \g<ws>* \g<type> \g<ws>+ \g<var>
'x.match(decl)
@variables[md['var']] ||= {
decl: decl,
type: md['type'],
name: md['var'],
}
end
end
@instances = RubyVM::InsnsDef.map {|h| new template: h, **h }
def self.fetch name
@instances.find do |insn|
insn.name == name
end or raise IndexError, "instruction not found: #{name}"
end
def self.to_a
@instances
end
end
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