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c906108c SS |
1 | /* This file is part of the program psim. |
2 | ||
3 | Copyright (C) 1994-1998, Andrew Cagney <[email protected]> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | ||
23 | #include "misc.h" | |
24 | #include "lf.h" | |
25 | #include "table.h" | |
26 | #include "filter.h" | |
27 | #include "igen.h" | |
28 | ||
29 | #include "ld-insn.h" | |
30 | #include "ld-decode.h" | |
31 | ||
32 | #include "gen.h" | |
33 | ||
34 | #include "gen-semantics.h" | |
35 | #include "gen-icache.h" | |
36 | #include "gen-idecode.h" | |
37 | ||
38 | ||
39 | static void | |
40 | print_semantic_function_header (lf *file, | |
41 | const char *basename, | |
42 | const char *format_name, | |
43 | opcode_bits *expanded_bits, | |
44 | int is_function_definition, | |
45 | int nr_prefetched_words) | |
46 | { | |
47 | int indent; | |
48 | lf_printf(file, "\n"); | |
49 | lf_print__function_type_function (file, print_semantic_function_type, | |
50 | "EXTERN_SEMANTICS", | |
51 | (is_function_definition ? "\n" : " ")); | |
52 | indent = print_function_name (file, | |
53 | basename, | |
54 | format_name, | |
55 | NULL, | |
56 | expanded_bits, | |
57 | function_name_prefix_semantics); | |
58 | if (is_function_definition) | |
59 | { | |
60 | indent += lf_printf (file, " "); | |
61 | lf_indent (file, +indent); | |
62 | } | |
63 | else | |
64 | { | |
65 | lf_printf (file, "\n"); | |
66 | } | |
67 | lf_printf (file, "("); | |
68 | lf_indent (file, +1); | |
69 | print_semantic_function_formal (file, nr_prefetched_words); | |
70 | lf_indent (file, -1); | |
71 | lf_printf (file, ")"); | |
72 | if (is_function_definition) | |
73 | { | |
74 | lf_indent (file, -indent); | |
75 | } | |
76 | else | |
77 | { | |
78 | lf_printf (file, ";"); | |
79 | } | |
80 | lf_printf (file, "\n"); | |
81 | } | |
82 | ||
83 | void | |
84 | print_semantic_declaration (lf *file, | |
85 | insn_entry *insn, | |
86 | opcode_bits *expanded_bits, | |
87 | insn_opcodes *opcodes, | |
88 | int nr_prefetched_words) | |
89 | { | |
90 | print_semantic_function_header (file, | |
91 | insn->name, | |
92 | insn->format_name, | |
93 | expanded_bits, | |
94 | 0/* is not function definition*/, | |
95 | nr_prefetched_words); | |
96 | } | |
97 | ||
98 | ||
99 | \f | |
100 | /* generate the semantics.c file */ | |
101 | ||
102 | ||
103 | void | |
104 | print_idecode_invalid (lf *file, | |
105 | const char *result, | |
106 | invalid_type type) | |
107 | { | |
108 | const char *name; | |
109 | switch (type) | |
110 | { | |
111 | default: name = "unknown"; break; | |
112 | case invalid_illegal: name = "illegal"; break; | |
113 | case invalid_fp_unavailable: name = "fp_unavailable"; break; | |
114 | case invalid_wrong_slot: name = "wrong_slot"; break; | |
115 | } | |
116 | if (options.gen.code == generate_jumps) | |
117 | { | |
118 | lf_printf (file, "goto %s_%s;\n", | |
119 | (options.gen.icache ? "icache" : "semantic"), | |
120 | name); | |
121 | } | |
122 | else if (options.gen.icache) | |
123 | { | |
124 | lf_printf (file, "%s %sicache_%s (", result, options.module.global.prefix.l, name); | |
125 | print_icache_function_actual (file, 0); | |
126 | lf_printf (file, ");\n"); | |
127 | } | |
128 | else | |
129 | { | |
130 | lf_printf (file, "%s %ssemantic_%s (", result, options.module.global.prefix.l, name); | |
131 | print_semantic_function_actual (file, 0); | |
132 | lf_printf (file, ");\n"); | |
133 | } | |
134 | } | |
135 | ||
136 | ||
137 | void | |
138 | print_semantic_body (lf *file, | |
139 | insn_entry *instruction, | |
140 | opcode_bits *expanded_bits, | |
141 | insn_opcodes *opcodes) | |
142 | { | |
143 | /* validate the instruction, if a cache this has already been done */ | |
144 | if (!options.gen.icache) | |
145 | { | |
146 | print_idecode_validate (file, instruction, opcodes); | |
147 | } | |
148 | ||
149 | print_itrace (file, instruction, 0/*put_value_in_cache*/); | |
150 | ||
151 | /* generate the instruction profile call - this is delayed until | |
152 | after the instruction has been verified. The count macro | |
153 | generated is prefixed by ITABLE_PREFIX */ | |
154 | { | |
155 | lf_printf (file, "\n"); | |
156 | lf_indent_suppress (file); | |
157 | lf_printf (file, "#if defined (%sPROFILE_COUNT_INSN)\n", | |
158 | options.module.itable.prefix.u); | |
159 | lf_printf (file, "%sPROFILE_COUNT_INSN (CPU, CIA, MY_INDEX);\n", | |
160 | options.module.itable.prefix.u); | |
161 | lf_indent_suppress (file); | |
162 | lf_printf (file, "#endif\n"); | |
163 | } | |
164 | ||
165 | /* generate the model call - this is delayed until after the | |
166 | instruction has been verified */ | |
167 | { | |
168 | lf_printf (file, "\n"); | |
169 | lf_indent_suppress (file); | |
170 | lf_printf (file, "#if defined (WITH_MON)\n"); | |
171 | lf_printf (file, "/* monitoring: */\n"); | |
172 | lf_printf (file, "if (WITH_MON & MONITOR_INSTRUCTION_ISSUE)\n"); | |
173 | lf_printf (file, " mon_issue ("); | |
174 | print_function_name (file, | |
175 | instruction->name, | |
176 | instruction->format_name, | |
177 | NULL, | |
178 | NULL, | |
179 | function_name_prefix_itable); | |
180 | lf_printf (file, ", cpu, cia);\n"); | |
181 | lf_indent_suppress (file); | |
182 | lf_printf (file, "#endif\n"); | |
183 | lf_printf (file, "\n"); | |
184 | } | |
185 | ||
186 | /* determine the new instruction address */ | |
187 | { | |
188 | lf_printf(file, "/* keep the next instruction address handy */\n"); | |
189 | if (options.gen.nia == nia_is_invalid) | |
190 | { | |
191 | lf_printf(file, "nia = %sINVALID_INSTRUCTION_ADDRESS;\n", | |
192 | options.module.global.prefix.u); | |
193 | } | |
194 | else | |
195 | { | |
196 | int nr_immeds = instruction->nr_words - 1; | |
197 | if (options.gen.delayed_branch) | |
198 | { | |
199 | if (nr_immeds > 0) | |
200 | { | |
201 | lf_printf (file, "cia.dp += %d * %d; %s\n", | |
202 | options.insn_bit_size / 8, nr_immeds, | |
203 | "/* skip dp immeds */"); | |
204 | } | |
205 | lf_printf (file, "nia.ip = cia.dp; %s\n", | |
206 | "/* instruction pointer */"); | |
207 | lf_printf (file, "nia.dp = cia.dp + %d; %s\n", | |
208 | options.insn_bit_size / 8, | |
209 | "/* delayed-slot pointer */"); | |
210 | } | |
211 | else | |
212 | { | |
213 | if (nr_immeds > 0) | |
214 | { | |
215 | lf_printf (file, "nia = cia + %d * (%d + 1); %s\n", | |
216 | options.insn_bit_size / 8, nr_immeds, | |
217 | "/* skip immeds as well */"); | |
218 | ||
219 | } | |
220 | else | |
221 | { | |
222 | lf_printf (file, "nia = cia + %d;\n", | |
223 | options.insn_bit_size / 8); | |
224 | } | |
225 | } | |
226 | } | |
227 | } | |
228 | ||
229 | /* if conditional, generate code to verify that the instruction | |
230 | should be issued */ | |
231 | if (filter_is_member (instruction->options, "c") | |
232 | || options.gen.conditional_issue) | |
233 | { | |
234 | lf_printf (file, "\n"); | |
235 | lf_printf (file, "/* execute only if conditional passes */\n"); | |
236 | lf_printf (file, "if (IS_CONDITION_OK)\n"); | |
237 | lf_printf (file, " {\n"); | |
238 | lf_indent (file, +4); | |
239 | /* FIXME - need to log a conditional failure */ | |
240 | } | |
241 | ||
242 | /* Architecture expects a REG to be zero. Instead of having to | |
243 | check every read to see if it is refering to that REG just zap it | |
244 | at the start of every instruction */ | |
245 | if (options.gen.zero_reg) | |
246 | { | |
247 | lf_printf (file, "\n"); | |
248 | lf_printf (file, "/* Architecture expects REG to be zero */\n"); | |
249 | lf_printf (file, "GPR_SET(%d, 0);\n", options.gen.zero_reg_nr); | |
250 | } | |
251 | ||
252 | /* generate the code (or at least something */ | |
253 | lf_printf (file, "\n"); | |
254 | lf_printf (file, "/* semantics: */\n"); | |
255 | if (instruction->code != NULL) | |
256 | { | |
257 | /* true code */ | |
258 | lf_printf (file, "{\n"); | |
259 | lf_indent (file, +2); | |
260 | lf_print__line_ref (file, instruction->code->line); | |
261 | table_print_code (file, instruction->code); | |
262 | lf_indent (file, -2); | |
263 | lf_printf (file, "}\n"); | |
264 | lf_print__internal_ref (file); | |
265 | } | |
266 | else if (filter_is_member (instruction->options, "nop")) | |
267 | { | |
268 | lf_print__internal_ref (file); | |
269 | } | |
270 | else | |
271 | { | |
272 | const char *prefix = "sim_engine_abort ("; | |
273 | int indent = strlen (prefix); | |
274 | /* abort so it is implemented now */ | |
275 | lf_print__line_ref (file, instruction->line); | |
276 | lf_printf (file, "%sSD, CPU, cia, \\\n", prefix); | |
277 | lf_indent (file, +indent); | |
278 | lf_printf (file, "\"%s:%d:0x%%08lx:%%s unimplemented\\n\", \\\n", | |
279 | filter_filename (instruction->line->file_name), | |
280 | instruction->line->line_nr); | |
281 | lf_printf (file, "(long) CIA, \\\n"); | |
282 | lf_printf (file, "%sitable[MY_INDEX].name);\n", | |
283 | options.module.itable.prefix.l); | |
284 | lf_indent (file, -indent); | |
285 | lf_print__internal_ref (file); | |
286 | } | |
287 | ||
288 | /* Close off the conditional execution */ | |
289 | if (filter_is_member (instruction->options, "c") | |
290 | || options.gen.conditional_issue) | |
291 | { | |
292 | lf_indent (file, -4); | |
293 | lf_printf (file, " }\n"); | |
294 | } | |
295 | } | |
296 | ||
297 | static void | |
298 | print_c_semantic (lf *file, | |
299 | insn_entry *instruction, | |
300 | opcode_bits *expanded_bits, | |
301 | insn_opcodes *opcodes, | |
302 | cache_entry *cache_rules, | |
303 | int nr_prefetched_words) | |
304 | { | |
305 | ||
306 | lf_printf (file, "{\n"); | |
307 | lf_indent (file, +2); | |
308 | ||
309 | print_my_defines (file, | |
310 | instruction->name, | |
311 | instruction->format_name, | |
312 | expanded_bits); | |
313 | lf_printf (file, "\n"); | |
314 | print_icache_body (file, | |
315 | instruction, | |
316 | expanded_bits, | |
317 | cache_rules, | |
318 | (options.gen.direct_access | |
319 | ? define_variables | |
320 | : declare_variables), | |
321 | (options.gen.icache | |
322 | ? get_values_from_icache | |
323 | : do_not_use_icache), | |
324 | nr_prefetched_words); | |
325 | ||
326 | lf_printf (file, "%sinstruction_address nia;\n", options.module.global.prefix.l); | |
327 | print_semantic_body (file, | |
328 | instruction, | |
329 | expanded_bits, | |
330 | opcodes); | |
331 | lf_printf (file, "return nia;\n"); | |
332 | ||
333 | /* generate something to clean up any #defines created for the cache */ | |
334 | if (options.gen.direct_access) | |
335 | { | |
336 | print_icache_body (file, | |
337 | instruction, | |
338 | expanded_bits, | |
339 | cache_rules, | |
340 | undef_variables, | |
341 | (options.gen.icache | |
342 | ? get_values_from_icache | |
343 | : do_not_use_icache), | |
344 | nr_prefetched_words); | |
345 | } | |
346 | ||
347 | lf_indent (file, -2); | |
348 | lf_printf (file, "}\n"); | |
349 | } | |
350 | ||
351 | static void | |
352 | print_c_semantic_function (lf *file, | |
353 | insn_entry *instruction, | |
354 | opcode_bits *expanded_bits, | |
355 | insn_opcodes *opcodes, | |
356 | cache_entry *cache_rules, | |
357 | int nr_prefetched_words) | |
358 | { | |
359 | /* build the semantic routine to execute the instruction */ | |
360 | print_semantic_function_header (file, | |
361 | instruction->name, | |
362 | instruction->format_name, | |
363 | expanded_bits, | |
364 | 1/*is-function-definition*/, | |
365 | nr_prefetched_words); | |
366 | print_c_semantic (file, | |
367 | instruction, | |
368 | expanded_bits, | |
369 | opcodes, | |
370 | cache_rules, | |
371 | nr_prefetched_words); | |
372 | } | |
373 | ||
374 | void | |
375 | print_semantic_definition (lf *file, | |
376 | insn_entry *insn, | |
377 | opcode_bits *expanded_bits, | |
378 | insn_opcodes *opcodes, | |
379 | cache_entry *cache_rules, | |
380 | int nr_prefetched_words) | |
381 | { | |
382 | print_c_semantic_function (file, | |
383 | insn, | |
384 | expanded_bits, | |
385 | opcodes, | |
386 | cache_rules, | |
387 | nr_prefetched_words); | |
388 | } | |
389 | ||
390 |