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comparison src/share/vm/adlc/adlparse.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // ADLPARSE.HPP - Definitions for Architecture Description Language Parser
26 // Authors: Chris Vick and Mike Paleczny
27
28 // Class List
29 class Form;
30 // ***** Top Level, 1, classes *****
31 class InstructForm;
32 class OperandForm;
33 class OpClassForm;
34 class AttributeForm;
35 class RegisterForm;
36 class PipelineForm;
37 class SourceForm;
38 class Peephole;
39 // ***** Level 2 classes *****
40 class Component;
41 class Predicate;
42 class MatchRule;
43 class Encode;
44 class Attribute;
45 class Effect;
46 class ExpandRule;
47 class RewriteRule;
48 class Constraint;
49 class ConstructRule;
50 // ***** Register Section *****
51 class RegDef;
52 class RegClass;
53 class AllocClass;
54 class ResourceForm;
55 // ***** Pipeline Section *****
56 class PipeDesc;
57 class PipeClass;
58 class RegList;
59 // ***** Peephole Section *****
60 class PeepMatch;
61 class PeepConstraint;
62 class PeepReplace;
63
64 // class ostream; // ostream is a typedef in some systems
65
66 extern char *toUpper(const char *str);
67
68 //---------------------------ADLParser-----------------------------------------
69 class ADLParser {
70 protected:
71 char *_curline; // Start of current line
72 char *_ptr; // Pointer into current location in File Buffer
73 int _linenum; // Count of line numbers seen so far
74 char _curchar; // Current character from buffer
75 FormDict &_globalNames; // Global names
76
77 enum { _preproc_limit = 20 };
78 int _preproc_depth; // How deep are we into ifdefs?
79 int _preproc_not_taken; // How deep in not-taken ifdefs?
80 bool _preproc_taken[_preproc_limit]; // Are we taking this ifdef level?
81 bool _preproc_else[_preproc_limit]; // Did this level have an else yet?
82
83 // ***** Level 1 Parse functions *****
84 void instr_parse(void); // Parse instruction definitions
85 void oper_parse(void); // Parse operand definitions
86 void opclass_parse(void); // Parse operand class definitions
87 void ins_attr_parse(void); // Parse instruction attrubute definitions
88 void op_attr_parse(void); // Parse operand attrubute definitions
89 void source_parse(void); // Parse source section
90 void source_hpp_parse(void); // Parse source_hpp section
91 void reg_parse(void); // Parse register section
92 void encode_parse(void); // Parse encoding section
93 void frame_parse(void); // Parse frame section
94 void pipe_parse(void); // Parse pipeline section
95 void definitions_parse(void); // Parse definitions section
96 void peep_parse(void); // Parse peephole rule definitions
97 void preproc_define(void); // Parse a #define statement
98 void preproc_undef(void); // Parse an #undef statement
99
100 // Helper functions for instr_parse().
101 void adjust_set_rule(InstructForm *instr);
102 void matchrule_clone_and_swap(MatchRule *rule, const char* instr_ident, int& match_rules_cnt);
103
104 // ***** Level 2 Parse functions *****
105 // Parse the components of the encode section
106 void enc_class_parse(void); // Parse encoding class definition
107 void enc_class_parse_block(EncClass* encoding, char* ec_name);
108
109 // Parse the components of the frame section
110 void stack_dir_parse(FrameForm *frame); // Parse the stack direction entry
111 void sync_stack_slots_parse(FrameForm *frame);
112 void frame_pointer_parse(FrameForm *frame, bool native);
113 void interpreter_frame_pointer_parse(FrameForm *frame, bool native);
114 void inline_cache_parse(FrameForm *frame, bool native);
115 void interpreter_arg_ptr_parse(FrameForm *frame, bool native);
116 void interpreter_method_oop_parse(FrameForm *frame, bool native);
117 void cisc_spilling_operand_name_parse(FrameForm *frame, bool native);
118 void stack_alignment_parse(FrameForm *frame);
119 void return_addr_parse(FrameForm *frame, bool native);
120 void preserve_stack_parse(FrameForm *frame);
121 char *calling_convention_parse();
122 char *return_value_parse();
123
124 // Parse components of the register section
125 void reg_def_parse(void); // Parse register definition
126 void reg_class_parse(void); // Parse register class definition
127 void alloc_class_parse(void); // Parse allocation class definition
128
129 // Parse components of the definition section
130 void int_def_parse(void); // Parse an integer definition
131
132 // Parse components of a pipeline rule
133 void resource_parse(PipelineForm &pipe); // Parse resource definition
134 void pipe_desc_parse(PipelineForm &pipe); // Parse pipeline description definition
135 void pipe_class_parse(PipelineForm &pipe); // Parse pipeline class definition
136
137 // Parse components of a peephole rule
138 void peep_match_parse(Peephole &peep); // Parse the peephole match rule
139 void peep_constraint_parse(Peephole &peep);// Parse the peephole constraints
140 void peep_replace_parse(Peephole &peep); // Parse peephole replacement rule
141
142 // Parse the peep match rule tree
143 InstructForm *peep_match_child_parse(PeepMatch &match, int parent, int &position, int input);
144
145 // Parse components of an operand and/or instruction form
146 Predicate *pred_parse(void); // Parse predicate rule
147 // Parse match rule, and internal nodes
148 MatchRule *match_parse(FormDict &operands);
149 MatchNode *matchNode_parse(FormDict &operands, int &depth,
150 int &numleaves, bool atroot);
151 MatchNode *matchChild_parse(FormDict &operands, int &depth,
152 int &numleaves, bool atroot);
153
154 Attribute *attr_parse(char *ident);// Parse instr/operand attribute rule
155 // Parse instruction encode rule
156 InsEncode *ins_encode_parse(InstructForm &inst);
157 InsEncode *ins_encode_parse_block(InstructForm &inst);
158 Opcode *opcode_parse(InstructForm *insr); // Parse instruction opcode
159 char *size_parse(InstructForm *insr); // Parse instruction size
160 Interface *interface_parse(); // Parse operand interface rule
161 Interface *mem_interface_parse(); // Parse memory interface rule
162 Interface *cond_interface_parse(); // Parse conditional interface rule
163 char *interface_field_parse();// Parse field contents
164
165 FormatRule *format_parse(void); // Parse format rule
166 void effect_parse(InstructForm *instr); // Parse effect rule
167 ExpandRule *expand_parse(InstructForm *instr); // Parse expand rule
168 RewriteRule *rewrite_parse(void); // Parse rewrite rule
169 Constraint *constraint_parse(void); // Parse constraint rule
170 ConstructRule *construct_parse(void); // Parse construct rule
171 void ins_pipe_parse(InstructForm &instr); // Parse ins_pipe rule
172
173 // ***** Preprocessor functions *****
174 void begin_if_def(bool taken) {
175 assert(_preproc_depth < _preproc_limit, "#ifdef nesting limit");
176 int ppn = _preproc_depth++;
177 _preproc_taken[ppn] = taken;
178 // Invariant: _preproc_not_taken = SUM !_preproc_taken[0.._preproc_depth)
179 if (!_preproc_taken[ppn]) _preproc_not_taken += 1;
180 _preproc_else[ppn] = false;
181 }
182 void invert_if_def() {
183 assert(_preproc_depth > 0, "#ifdef matching");
184 int ppn = _preproc_depth - 1;
185 assert(!_preproc_else[ppn], "multiple #else lines");
186 _preproc_else[ppn] = true;
187 if (!_preproc_taken[ppn]) _preproc_not_taken -= 1;
188 _preproc_taken[ppn] = !_preproc_taken[ppn];
189 if (!_preproc_taken[ppn]) _preproc_not_taken += 1;
190 }
191 void end_if_def() {
192 assert(_preproc_depth > 0, "#ifdef matching");
193 int ppn = --_preproc_depth;
194 if (!_preproc_taken[ppn]) _preproc_not_taken -= 1;
195 }
196 bool preproc_taken() {
197 // Return true only if there is no directive hiding this text position.
198 return _preproc_not_taken == 0;
199 }
200 // Handle a '#' token. Return true if it disappeared.
201 bool handle_preproc_token();
202
203 // ***** Utility Functions for ADL Parser ******
204
205 // Parse one string argument inside parens: '(' string ')' ';'
206 char *parse_one_arg(const char *description);
207
208 // Return the next identifier given a pointer into a line of the buffer.
209 char *get_ident() { return get_ident_common(true); }
210 char *get_ident_no_preproc() { return get_ident_common(false); }
211 char *get_ident_common(bool do_preproc); // Grab it from the file buffer
212 char *get_ident_dup(void); // Grab a duplicate of the identifier
213 char *get_ident_or_literal_constant(const char* description);
214 // Grab unique identifier from file buffer
215 char *get_unique_ident(FormDict &dict, const char *nameDescription);
216 // Return the next replacement variable identifier
217 char *get_rep_var_ident(void);
218 // Skip first '$' and make a duplicate of the string
219 char *get_rep_var_ident_dup(void);
220 // Return the next token given as a signed integer.
221 int get_int(void);
222 // Return the next token, a relational operator { ==, !=, <=, >= }
223 char *get_relation_dup(void);
224
225 void get_oplist(NameList &parameters, FormDict &operands);// Parse type-operand pairs
226 void get_effectlist(FormDict &effects, FormDict &operands); // Parse effect-operand pairs
227 // Return the contents of a parenthesized expression.
228 // Requires initial '(' and consumes final ')', which is replaced by '\0'.
229 char *get_paren_expr(const char *description);
230 // Return expression up to next stop-char, which terminator replaces.
231 // Does not require initial '('. Does not consume final stop-char.
232 // Final stop-char is left in _curchar, but is also is replaced by '\0'.
233 char *get_expr(const char *description, const char *stop_chars);
234 char *find_cpp_block(const char *description); // Parse a C++ code block
235 // Issue parser error message & go to EOL
236 void parse_err(int flag, const char *fmt, ...);
237
238 // Return pointer to current character
239 inline char cur_char(void);
240 // Advance to next character, assign this to _curchar
241 inline void next_char(void);
242 inline void next_char_or_line(void);
243 // Advance File Buffer to next line, updating _curline
244 inline void next_line(void);
245 // Issue an error if we are not at the beginning of a line (exc. whitespace).
246 void ensure_start_of_line(void);
247 // Issue an error if we are not at the end of a line (exc. whitespace).
248 void ensure_end_of_line(void);
249 // Skip whitespace, leaving ptr pointing to first non-whitespace character
250 // Also handle preprocessor constructs like "#ifdef".
251 void skipws() { skipws_common(true); }
252 // Skip comments and spaces but not newlines or preprocessor constructs.
253 void skipws_no_preproc() { skipws_common(false); }
254 void skipws_common(bool do_preproc);
255
256 FileBuff &_buf; // File buffer to be parsed
257 ArchDesc &_AD; // Architecture Description being built
258
259 public:
260
261 ADLParser(FileBuff &buf, ArchDesc &archDesc); // Create new ADLParser object
262 ~ADLParser(); // Destroy ADLParser object
263
264 void parse(void); // Do the parsing & build forms lists
265
266 int getlines( ) { return _linenum; }
267
268 static bool is_literal_constant(const char *hex_string);
269 static bool is_hex_digit(char digit);
270 static bool is_int_token(const char* token, int& intval);
271 static void trim(char* &token); // trim leading & trailing spaces
272 };