1 /* This file is part of the program psim.
3 Copyright (C) 1994-1998, Andrew Cagney <cagney@highland.com.au>
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.
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.
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.
21 /* code-generation options: */
25 /* Transfer control to an instructions semantic code using the the
26 standard call/return mechanism */
30 /* Transfer control to an instructions semantic code using
31 (computed) goto's instead of the more conventional call/return
46 typedef struct _igen_gen_options igen_gen_options;
47 struct _igen_gen_options {
51 int conditional_issue;
52 int slot_verification;
55 /* If zeroing a register, which one? */
59 /* should multiple simulators be generated? */
62 /* name of the default multi-sim model */
65 /* should the simulator support multi word instructions and if so,
66 what is the max nr of words. */
69 /* SMP? Should the generated code include SMP support (>0) and if
70 so, for how many processors? */
73 /* how should the next instruction address be computed? */
76 /* nr of instructions in the decoded instruction cache */
85 typedef struct _igen_trace_options igen_trace_options;
86 struct _igen_trace_options {
93 typedef struct _igen_name {
97 typedef struct _igen_module {
102 typedef struct _igen_module_options {
108 igen_module semantics;
110 } igen_module_options;
112 typedef struct _igen_decode_options igen_decode_options ;
113 struct _igen_decode_options {
115 /* Combine tables? Should the generator make a second pass through
116 each generated table looking for any sub-entries that contain the
117 same instructions. Those entries being merged into a single
121 /* Instruction expansion? Should the semantic code for each
122 instruction, when the oportunity arrises, be expanded according
123 to the variable opcode files that the instruction decode process
127 /* Treat reserved fields as constant (zero) instead of ignoring
128 their value when determining decode tables */
131 /* Convert any padded switch rules into goto_switch */
134 /* Force all tables to be generated with this lookup mechanism */
135 char *overriding_gen;
139 typedef struct _igen_warn_options igen_warn_options;
140 struct _igen_warn_options {
142 /* Issue warning about discarded instructions */
145 /* Issue warning about invalid instruction widths */
151 typedef struct _igen_options igen_options;
152 struct _igen_options {
154 /* What does the instruction look like - bit ordering, size, widths or
158 int insn_specifying_widths;
160 /* what should global names be prefixed with? */
161 igen_module_options module;
163 /* See above for options and flags */
164 igen_gen_options gen;
166 /* See above for trace options */
167 igen_trace_options trace;
169 /* See above for include options */
170 table_include *include;
172 /* See above for decode options */
173 igen_decode_options decode;
175 /* Filter set to be used on the flag field of the instruction table */
176 filter *flags_filter;
178 /* See above for warn options */
179 igen_warn_options warn;
181 /* Be more picky about the input */
182 error_func (*warning);
184 /* Model (processor) set - like flags_filter. Used to select the
185 specific ISA within a processor family. */
186 filter *model_filter;
188 /* Format name set */
189 filter *format_name_filter;
192 extern igen_options options;
194 /* default options - hopefully backward compatible */ \
195 #define INIT_OPTIONS() \
197 memset (&options, 0, sizeof options); \
198 memset (&options.warn, -1, sizeof (options.warn)); \
199 options.hi_bit_nr = 0; \
200 options.insn_bit_size = default_insn_bit_size; \
201 options.insn_specifying_widths = 0; \
202 options.module.global.prefix.u = ""; \
203 options.module.global.prefix.l = ""; \
205 options.module.engine = options.module.global; \
206 options.module.icache = options.module.global; \
207 options.module.idecode = options.module.global; \
208 options.module.itable = options.module.global; \
209 options.module.semantics = options.module.global; \
210 options.module.support = options.module.global; \
212 options.module.engine.suffix.l = "engine"; \
213 options.module.engine.suffix.u = "ENGINE"; \
214 options.module.icache.suffix.l = "icache"; \
215 options.module.icache.suffix.u = "ICACHE"; \
216 options.module.idecode.suffix.l = "idecode"; \
217 options.module.idecode.suffix.u = "IDECODE"; \
218 options.module.itable.suffix.l = "itable"; \
219 options.module.itable.suffix.u = "ITABLE"; \
220 options.module.semantics.suffix.l = "semantics"; \
221 options.module.semantics.suffix.u = "SEMANTICS"; \
222 options.module.support.suffix.l = "support"; \
223 options.module.support.suffix.u = "SUPPORT"; \
225 options.gen.code = generate_calls; \
226 options.gen.icache_size = 1024; \
227 options.warning = warning; \