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authorMichael Meissner <gnu@the-meissners.org>1996-07-23 15:42:42 +0000
committerMichael Meissner <gnu@the-meissners.org>1996-07-23 15:42:42 +0000
commit30c87b55ec44de3a56cecf41fc7c93ed0c4005ca (patch)
tree5752ad56a8e4c990eb02b12f68d486415c79c41b /sim/ppc/gen-semantics.c
parent856bcbcbbc01a252a8df2221038100e9a33f87ff (diff)
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New simulator changes from Andrew
Diffstat (limited to 'sim/ppc/gen-semantics.c')
-rw-r--r--sim/ppc/gen-semantics.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/sim/ppc/gen-semantics.c b/sim/ppc/gen-semantics.c
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+/* This file is part of the program psim.
+
+ Copyright (C) 1994-1995, 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.
+
+ */
+
+
+
+#include "misc.h"
+#include "lf.h"
+#include "table.h"
+#include "filter.h"
+
+#include "ld-decode.h"
+#include "ld-cache.h"
+#include "ld-insn.h"
+
+#include "igen.h"
+
+#include "gen-semantics.h"
+#include "gen-icache.h"
+#include "gen-idecode.h"
+
+
+static void
+print_semantic_function_header(lf *file,
+ const char *basename,
+ insn_bits *expanded_bits,
+ int is_function_definition)
+{
+ int indent;
+ lf_printf(file, "\n");
+ lf_print_function_type(file, SEMANTIC_FUNCTION_TYPE, "EXTERN_SEMANTICS",
+ (is_function_definition ? "\n" : " "));
+ indent = print_function_name(file,
+ basename,
+ expanded_bits,
+ function_name_prefix_semantics);
+ if (is_function_definition)
+ lf_indent(file, +indent);
+ else
+ lf_printf(file, "\n");
+ lf_printf(file, "(%s)", SEMANTIC_FUNCTION_FORMAL);
+ if (is_function_definition)
+ lf_indent(file, -indent);
+ else
+ lf_printf(file, ";");
+ lf_printf(file, "\n");
+}
+
+void
+print_semantic_declaration(insn_table *entry,
+ lf *file,
+ void *data,
+ insn *instruction,
+ int depth)
+{
+ if (generate_expanded_instructions) {
+ ASSERT(entry->nr_insn == 1);
+ print_semantic_function_header(file,
+ instruction->file_entry->fields[insn_name],
+ entry->expanded_bits,
+ 0/* is not function definition*/);
+ }
+ else {
+ print_semantic_function_header(file,
+ instruction->file_entry->fields[insn_name],
+ NULL,
+ 0/* is not function definition*/);
+ }
+}
+
+
+
+/* generate the semantics.c file */
+
+
+void
+print_idecode_illegal(lf *file,
+ const char *result)
+{
+ if ((code & generate_jumps))
+ lf_printf(file, "goto %s_illegal;\n", (code & generate_with_icache) ? "icache" : "semantic");
+ else if ((code & generate_with_icache))
+ lf_printf(file, "%s icache_illegal(%s);\n", result, ICACHE_FUNCTION_ACTUAL);
+ else
+ lf_printf(file, "%s semantic_illegal(%s);\n", result, SEMANTIC_FUNCTION_ACTUAL);
+}
+
+
+void
+print_semantic_body(lf *file,
+ insn *instruction,
+ insn_bits *expanded_bits,
+ opcode_field *opcodes)
+{
+ print_itrace(file, instruction->file_entry, 0/*put_value_in_cache*/);
+
+ /* validate the instruction, if a cache this has already been done */
+ if (!(code & generate_with_icache))
+ print_idecode_validate(file, instruction, opcodes);
+
+ /* generate the profiling call - this is delayed until after the
+ instruction has been verified */
+ lf_printf(file, "\n");
+ lf_printf(file, "/* monitoring: */\n");
+ lf_printf(file, "if (WITH_MON & MONITOR_INSTRUCTION_ISSUE) {\n");
+ lf_printf(file, " mon_issue(");
+ print_function_name(file,
+ instruction->file_entry->fields[insn_name],
+ NULL,
+ function_name_prefix_itable);
+ lf_printf(file, ", processor, cia);\n");
+ lf_printf(file, "}\n");
+
+ /* generate the code (or at least something */
+ lf_printf(file, "\n");
+ lf_printf(file, "/* semantics: */\n");
+ lf_printf(file, "nia = cia + %d;\n", insn_bit_size / 8);
+ if (instruction->file_entry->annex != NULL) {
+ /* true code */
+ table_entry_print_cpp_line_nr(file, instruction->file_entry);
+ lf_printf(file, "{\n");
+ lf_indent(file, +2);
+ lf_print__c_code(file, instruction->file_entry->annex);
+ lf_indent(file, -2);
+ lf_printf(file, "}\n");
+ lf_print__internal_reference(file);
+ }
+ else if (it_is("nop", instruction->file_entry->fields[insn_flags])) {
+ lf_print__internal_reference(file);
+ }
+ else if (it_is("f", instruction->file_entry->fields[insn_flags])) {
+ /* unimplemented floating point instruction - call for assistance */
+ lf_printf(file, "/* unimplemented floating point instruction - call for assistance */\n");
+ table_entry_print_cpp_line_nr(file, instruction->file_entry);
+ lf_putstr(file, "floating_point_assist_interrupt(processor, cia);\n");
+ lf_print__internal_reference(file);
+ }
+ else {
+ /* abort so it is implemented now */
+ table_entry_print_cpp_line_nr(file, instruction->file_entry);
+ lf_putstr(file, "error(\"%s:%d:0x%08lx:%s unimplemented\\n\",\n");
+ lf_printf(file, " itable[MY_INDEX].file, itable[MY_INDEX].line_nr, (long)cia, itable[MY_INDEX].name);\n");
+ lf_print__internal_reference(file);
+ }
+}
+
+static void
+print_c_semantic(lf *file,
+ insn *instruction,
+ insn_bits *expanded_bits,
+ opcode_field *opcodes,
+ cache_table *cache_rules)
+{
+
+ lf_printf(file, "{\n");
+ lf_indent(file, +2);
+
+ print_define_my_index(file, instruction->file_entry);
+ lf_printf(file, "\n");
+ print_icache_body(file,
+ instruction,
+ expanded_bits,
+ cache_rules,
+ (code & generate_with_direct_access_icache),
+ (code & generate_with_icache)/*get_value_from_cache*/,
+ 0/*put_value_in_cache*/);
+
+ lf_printf(file, "unsigned_word nia;\n");
+ print_semantic_body(file,
+ instruction,
+ expanded_bits,
+ opcodes);
+ lf_printf(file, "return nia;\n");
+
+ /* generate something to clean up any #defines created for the cache */
+ if ((code & generate_with_direct_access_icache))
+ print_icache_body(file,
+ instruction,
+ expanded_bits,
+ cache_rules,
+ 1/*use_defines*/,
+ 0/*get_value_from_cache*/,
+ 1/*put_value_in_cache*/);
+
+ lf_indent(file, -2);
+ lf_printf(file, "}\n");
+}
+
+static void
+print_c_semantic_function(lf *file,
+ insn *instruction,
+ insn_bits *expanded_bits,
+ opcode_field *opcodes,
+ cache_table *cache_rules)
+{
+ /* build the semantic routine to execute the instruction */
+ print_semantic_function_header(file,
+ instruction->file_entry->fields[insn_name],
+ expanded_bits,
+ 1/*is-function-definition*/);
+ print_c_semantic(file,
+ instruction,
+ expanded_bits,
+ opcodes,
+ cache_rules);
+}
+
+void
+print_semantic_definition(insn_table *entry,
+ lf *file,
+ void *data,
+ insn *instruction,
+ int depth)
+{
+ cache_table *cache_rules = (cache_table*)data;
+ if (generate_expanded_instructions) {
+ ASSERT(entry->nr_insn == 1
+ && entry->opcode == NULL
+ && entry->parent != NULL
+ && entry->parent->opcode != NULL);
+ ASSERT(entry->nr_insn == 1
+ && entry->opcode == NULL
+ && entry->parent != NULL
+ && entry->parent->opcode != NULL
+ && entry->parent->opcode_rule != NULL);
+ print_c_semantic_function(file,
+ entry->insns,
+ entry->expanded_bits,
+ entry->parent->opcode,
+ cache_rules);
+ }
+ else {
+ print_c_semantic_function(file, instruction,
+ NULL, NULL,
+ cache_rules);
+ }
+}