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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [sim/] [ppc/] [gen-semantics.c] - Rev 602
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/* This file is part of the program psim. Copyright (C) 1994-1997, 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, "PSIM_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 { /* 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_my_defines(file, expanded_bits, instruction->file_entry); lf_printf(file, "\n"); print_icache_body(file, instruction, expanded_bits, cache_rules, ((code & generate_with_direct_access) ? define_variables : declare_variables), ((code & generate_with_icache) ? get_values_from_icache : do_not_use_icache)); 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) print_icache_body(file, instruction, expanded_bits, cache_rules, undef_variables, ((code & generate_with_icache) ? get_values_from_icache : do_not_use_icache)); 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); } }
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