254 lines
6.3 KiB
C
254 lines
6.3 KiB
C
/* The IGEN simulator generator for GDB, the GNU Debugger.
|
|
|
|
Copyright 2002, 2007 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 2 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, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
|
|
/* 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)
|