1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
#! /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 opts = {}
@template = opts[:template]
@name = opts[:name]
@loc = opts[:location]
@sig = opts[:signature]
@expr = RubyVM::CExpr.new opts[:expr]
@opes = typesplit @sig[:ope]
@pops = typesplit @sig[:pop].reject {|i| i == '...' }
@rets = typesplit @sig[:ret].reject {|i| i == '...' }
@attrs = opts[:attributes].map {|i|
RubyVM::Attribute.new i.merge(:insn => self)
}.each_with_object({}) {|a, h|
h[a.key] = a
}
@attrs_orig = @attrs.dup
predefine_attributes
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 'attr_%s_%s(%s)', name, @name, \
@opes.map {|i| i[:name] }.compact.join(', ')
end
def has_attribute? k
@attrs_orig.has_key? k
end
def attributes
return @attrs.values
end
def width
return 1 + opes.size
end
def declarations
return @variables \
. values \
. group_by {|h| h[:type] } \
. sort_by {|t, v| t } \
. map {|t, v| [t, v.map {|i| i[:name] }.sort ] } \
. map {|t, v|
sprintf("MAYBE_UNUSED(%s) %s", t, v.join(', '))
}
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 handles_sp?
/\b(false|0)\b/ !~ @attrs.fetch('handles_sp').expr.expr
end
def always_leaf?
@attrs.fetch('leaf').expr.expr == 'true;'
end
def complicated_return_values?
@sig[:ret].any? {|i| i == '...' }
end
def inspect
sprintf "#<%s %s@%s:%d>", self.class.name, @name, @loc[0], @loc[1]
end
private
def generate_attribute t, k, v
@attrs[k] ||= RubyVM::Attribute.new \
insn: self, \
name: k, \
type: t, \
location: [], \
expr: v.to_s + ';'
return @attrs[k] ||= attr
end
def predefine_attributes
generate_attribute 'const char*', 'name', "insn_name(#{bin})"
generate_attribute 'enum ruby_vminsn_type', 'bin', bin
generate_attribute 'rb_num_t', 'open', opes.size
generate_attribute 'rb_num_t', 'popn', pops.size
generate_attribute 'rb_num_t', 'retn', rets.size
generate_attribute 'rb_num_t', 'width', width
generate_attribute 'rb_snum_t', 'sp_inc', rets.size - pops.size
generate_attribute 'bool', 'handles_sp', false
generate_attribute 'bool', 'leaf', opes.all? {|o|
# Insn with ISEQ should yield it; can never be a leaf.
o[:type] != 'ISEQ'
}
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 h.merge(:template => 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
|
