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Diffstat (limited to 'sim/igen/igen.h')
| -rw-r--r-- | sim/igen/igen.h | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/sim/igen/igen.h b/sim/igen/igen.h new file mode 100644 index 0000000..bdfdb83 --- /dev/null +++ b/sim/igen/igen.h @@ -0,0 +1,234 @@ +/* This file is part of the program psim. + + Copyright (C) 1994-1998, Andrew Cagney <cagney@highland.com.au> + + 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) |