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- /* The IGEN simulator generator for GDB, the GNU Debugger.
- Copyright 2002-2022 Free Software Foundation, Inc.
- Contributed by Andrew Cagney.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- /* code-generation options: */
- typedef enum
- {
- /* Transfer control to an instructions semantic code using the the
- standard call/return mechanism */
- generate_calls,
- /* Transfer control to an instructions semantic code using
- (computed) goto's instead of the more conventional call/return
- mechanism */
- generate_jumps,
- }
- igen_code;
- typedef enum
- {
- nia_is_cia_plus_one,
- nia_is_void,
- nia_is_invalid,
- }
- igen_nia;
- typedef struct _igen_gen_options igen_gen_options;
- struct _igen_gen_options
- {
- int direct_access;
- int semantic_icache;
- int insn_in_icache;
- int conditional_issue;
- int slot_verification;
- int delayed_branch;
- /* If zeroing a register, which one? */
- int zero_reg;
- int zero_reg_nr;
- /* should multiple simulators be generated? */
- int multi_sim;
- /* name of the default multi-sim model */
- char *default_model;
- /* should the simulator support multi word instructions and if so,
- what is the max nr of words. */
- int multi_word;
- /* SMP? Should the generated code include SMP support (>0) and if
- so, for how many processors? */
- int smp;
- /* how should the next instruction address be computed? */
- igen_nia nia;
- /* nr of instructions in the decoded instruction cache */
- int icache;
- int icache_size;
- /* see above */
- igen_code code;
- };
- typedef struct _igen_trace_options igen_trace_options;
- struct _igen_trace_options
- {
- int rule_selection;
- int rule_rejection;
- int insn_insertion;
- int insn_expansion;
- int entries;
- int combine;
- };
- typedef struct _igen_name
- {
- char *u;
- char *l;
- }
- igen_name;
- typedef struct _igen_module
- {
- igen_name prefix;
- igen_name suffix;
- }
- igen_module;
- typedef struct _igen_module_options
- {
- igen_module global;
- igen_module engine;
- igen_module icache;
- igen_module idecode;
- igen_module itable;
- igen_module semantics;
- igen_module support;
- }
- igen_module_options;
- typedef struct _igen_decode_options igen_decode_options;
- struct _igen_decode_options
- {
- /* Combine tables? Should the generator make a second pass through
- each generated table looking for any sub-entries that contain the
- same instructions. Those entries being merged into a single
- table */
- int combine;
- /* Instruction expansion? Should the semantic code for each
- instruction, when the oportunity arrises, be expanded according
- to the variable opcode files that the instruction decode process
- renders constant */
- int duplicate;
- /* Treat reserved fields as constant (zero) instead of ignoring
- their value when determining decode tables */
- int zero_reserved;
- /* Convert any padded switch rules into goto_switch */
- int switch_as_goto;
- /* Force all tables to be generated with this lookup mechanism */
- char *overriding_gen;
- };
- typedef struct _igen_warn_options igen_warn_options;
- struct _igen_warn_options
- {
- /* Issue warning about discarded instructions */
- int discard;
- /* Issue warning about invalid instruction widths */
- int width;
- /* Issue warning about unimplemented instructions */
- int unimplemented;
- };
- typedef struct _igen_options igen_options;
- struct _igen_options
- {
- /* What does the instruction look like - bit ordering, size, widths or
- offesets */
- int hi_bit_nr;
- int insn_bit_size;
- int insn_specifying_widths;
- /* what should global names be prefixed with? */
- igen_module_options module;
- /* See above for options and flags */
- igen_gen_options gen;
- /* See above for trace options */
- igen_trace_options trace;
- /* See above for include options */
- table_include *include;
- /* See above for decode options */
- igen_decode_options decode;
- /* Filter set to be used on the flag field of the instruction table */
- filter *flags_filter;
- /* See above for warn options */
- igen_warn_options warn;
- /* Be more picky about the input */
- error_func (*warning);
- /* Model (processor) set - like flags_filter. Used to select the
- specific ISA within a processor family. */
- filter *model_filter;
- /* Format name set */
- filter *format_name_filter;
- };
- extern igen_options options;
- /* default options - hopefully backward compatible */
- #define INIT_OPTIONS() \
- do { \
- memset (&options, 0, sizeof options); \
- memset (&options.warn, -1, sizeof (options.warn)); \
- options.hi_bit_nr = 0; \
- options.insn_bit_size = default_insn_bit_size; \
- options.insn_specifying_widths = 0; \
- options.module.global.prefix.u = ""; \
- options.module.global.prefix.l = ""; \
- /* the prefixes */ \
- options.module.engine = options.module.global; \
- options.module.icache = options.module.global; \
- options.module.idecode = options.module.global; \
- options.module.itable = options.module.global; \
- options.module.semantics = options.module.global; \
- options.module.support = options.module.global; \
- /* the suffixes */ \
- options.module.engine.suffix.l = "engine"; \
- options.module.engine.suffix.u = "ENGINE"; \
- options.module.icache.suffix.l = "icache"; \
- options.module.icache.suffix.u = "ICACHE"; \
- options.module.idecode.suffix.l = "idecode"; \
- options.module.idecode.suffix.u = "IDECODE"; \
- options.module.itable.suffix.l = "itable"; \
- options.module.itable.suffix.u = "ITABLE"; \
- options.module.semantics.suffix.l = "semantics"; \
- options.module.semantics.suffix.u = "SEMANTICS"; \
- options.module.support.suffix.l = "support"; \
- options.module.support.suffix.u = "SUPPORT"; \
- /* misc stuff */ \
- options.gen.code = generate_calls; \
- options.gen.icache_size = 1024; \
- options.warning = warning; \
- } while (0)
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