mirror of
https://sourceware.org/git/binutils-gdb.git
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1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
392 lines
11 KiB
C
392 lines
11 KiB
C
/* The IGEN simulator generator for GDB, the GNU Debugger.
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Copyright 2002-2024 Free Software Foundation, Inc.
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Contributed by Andrew Cagney.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "misc.h"
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#include "lf.h"
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#include "table.h"
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#include "filter.h"
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#include "igen.h"
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#include "ld-insn.h"
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#include "ld-decode.h"
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#include "gen.h"
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#include "gen-semantics.h"
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#include "gen-icache.h"
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#include "gen-idecode.h"
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static void
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print_semantic_function_header (lf *file,
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const char *basename,
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const char *format_name,
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const opcode_bits *expanded_bits,
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int is_function_definition,
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int nr_prefetched_words)
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{
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int indent;
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lf_printf (file, "\n");
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lf_print__function_type_function (file, print_semantic_function_type,
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"EXTERN_SEMANTICS",
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(is_function_definition ? "\n" : " "));
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indent = print_function_name (file,
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basename,
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format_name,
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NULL,
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expanded_bits,
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function_name_prefix_semantics);
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if (is_function_definition)
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{
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indent += lf_printf (file, " ");
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lf_indent (file, +indent);
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}
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else
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{
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lf_printf (file, "\n");
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}
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lf_printf (file, "(");
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lf_indent (file, +1);
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print_semantic_function_formal (file, nr_prefetched_words);
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lf_indent (file, -1);
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lf_printf (file, ")");
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if (is_function_definition)
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{
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lf_indent (file, -indent);
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}
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else
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{
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lf_printf (file, ";");
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}
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lf_printf (file, "\n");
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}
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void
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print_semantic_declaration (lf *file,
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const insn_entry *insn,
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const opcode_bits *expanded_bits,
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const insn_opcodes *opcodes,
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int nr_prefetched_words)
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{
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print_semantic_function_header (file,
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insn->name,
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insn->format_name,
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expanded_bits,
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0 /* is not function definition */ ,
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nr_prefetched_words);
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}
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/* generate the semantics.c file */
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void
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print_idecode_invalid (lf *file, const char *result, invalid_type type)
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{
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const char *name;
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switch (type)
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{
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default:
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name = "unknown";
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break;
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case invalid_illegal:
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name = "illegal";
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break;
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case invalid_fp_unavailable:
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name = "fp_unavailable";
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break;
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case invalid_wrong_slot:
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name = "wrong_slot";
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break;
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}
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if (options.gen.code == generate_jumps)
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{
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lf_printf (file, "goto %s_%s;\n",
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(options.gen.icache ? "icache" : "semantic"), name);
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}
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else if (options.gen.icache)
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{
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lf_printf (file, "%s %sicache_%s (", result,
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options.module.global.prefix.l, name);
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print_icache_function_actual (file, 0);
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lf_printf (file, ");\n");
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}
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else
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{
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lf_printf (file, "%s %ssemantic_%s (", result,
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options.module.global.prefix.l, name);
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print_semantic_function_actual (file, 0);
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lf_printf (file, ");\n");
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}
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}
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void
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print_semantic_body (lf *file,
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const insn_entry *instruction,
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const opcode_bits *expanded_bits,
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const insn_opcodes *opcodes)
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{
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/* validate the instruction, if a cache this has already been done */
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if (!options.gen.icache)
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{
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print_idecode_validate (file, instruction, opcodes);
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}
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print_itrace (file, instruction, 0 /*put_value_in_cache */ );
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/* generate the instruction profile call - this is delayed until
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after the instruction has been verified. The count macro
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generated is prefixed by ITABLE_PREFIX */
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{
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lf_printf (file, "\n");
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lf_indent_suppress (file);
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lf_printf (file, "#if defined (%sPROFILE_COUNT_INSN)\n",
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options.module.itable.prefix.u);
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lf_printf (file, "%sPROFILE_COUNT_INSN (CPU, CIA, MY_INDEX);\n",
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options.module.itable.prefix.u);
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lf_indent_suppress (file);
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lf_printf (file, "#endif\n");
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}
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/* generate the model call - this is delayed until after the
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instruction has been verified */
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{
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lf_printf (file, "\n");
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lf_indent_suppress (file);
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lf_printf (file, "#if defined (WITH_MON)\n");
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lf_printf (file, "/* monitoring: */\n");
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lf_printf (file, "if (WITH_MON & MONITOR_INSTRUCTION_ISSUE)\n");
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lf_printf (file, " mon_issue (");
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print_function_name (file,
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instruction->name,
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instruction->format_name,
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NULL, NULL, function_name_prefix_itable);
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lf_printf (file, ", cpu, cia);\n");
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lf_indent_suppress (file);
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lf_printf (file, "#endif\n");
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lf_printf (file, "\n");
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}
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/* determine the new instruction address */
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{
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lf_printf (file, "/* keep the next instruction address handy */\n");
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if (options.gen.nia == nia_is_invalid)
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{
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lf_printf (file, "nia = %sINVALID_INSTRUCTION_ADDRESS;\n",
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options.module.global.prefix.u);
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}
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else
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{
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int nr_immeds = instruction->nr_words - 1;
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if (options.gen.delayed_branch)
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{
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if (nr_immeds > 0)
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{
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lf_printf (file, "cia.dp += %d * %d; %s\n",
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options.insn_bit_size / 8, nr_immeds,
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"/* skip dp immeds */");
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}
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lf_printf (file, "nia.ip = cia.dp; %s\n",
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"/* instruction pointer */");
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lf_printf (file, "nia.dp = cia.dp + %d; %s\n",
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options.insn_bit_size / 8,
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"/* delayed-slot pointer */");
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}
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else
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{
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if (nr_immeds > 0)
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{
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lf_printf (file, "nia = cia + %d * (%d + 1); %s\n",
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options.insn_bit_size / 8, nr_immeds,
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"/* skip immeds as well */");
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}
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else
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{
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lf_printf (file, "nia = cia + %d;\n",
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options.insn_bit_size / 8);
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}
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}
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}
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}
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/* if conditional, generate code to verify that the instruction
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should be issued */
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if (filter_is_member (instruction->options, "c")
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|| options.gen.conditional_issue)
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{
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lf_printf (file, "\n");
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lf_printf (file, "/* execute only if conditional passes */\n");
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lf_printf (file, "if (IS_CONDITION_OK)\n");
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lf_printf (file, " {\n");
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lf_indent (file, +4);
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/* FIXME - need to log a conditional failure */
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}
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/* Architecture expects a REG to be zero. Instead of having to
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check every read to see if it is refering to that REG just zap it
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at the start of every instruction */
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if (options.gen.zero_reg)
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{
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lf_printf (file, "\n");
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lf_printf (file, "/* Architecture expects REG to be zero */\n");
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lf_printf (file, "GPR_CLEAR(%d);\n", options.gen.zero_reg_nr);
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}
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/* generate the code (or at least something */
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lf_printf (file, "\n");
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lf_printf (file, "/* semantics: */\n");
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if (instruction->code != NULL)
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{
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/* true code */
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lf_printf (file, "{\n");
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/* NB: Do not indent the code. If the .igen source files cause a compiler
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warning, the diagnostics can read the line from the original source,
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but use column offsets from the generated files, causing columns to be
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misaligned. It makes the generated code slightly more difficult to
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read, but accurate compiler diagnostics relative to the original source
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are more important here.
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lf_indent (file, +2); */
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lf_print__line_ref (file, instruction->code->line);
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table_print_code (file, instruction->code);
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/* NB: Disabled -- see above.
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lf_indent (file, -2); */
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lf_printf (file, "}\n");
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lf_print__internal_ref (file);
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}
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else if (filter_is_member (instruction->options, "nop"))
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{
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lf_print__internal_ref (file);
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}
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else
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{
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const char *prefix = "sim_engine_abort (";
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int indent = strlen (prefix);
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/* abort so it is implemented now */
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lf_print__line_ref (file, instruction->line);
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lf_printf (file, "%sSD, CPU, cia, \\\n", prefix);
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lf_indent (file, +indent);
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lf_printf (file, "\"%s:%d:0x%%08lx:%%s unimplemented\\n\", \\\n",
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filter_filename (instruction->line->file_name),
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instruction->line->line_nr);
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lf_printf (file, "(long) CIA, \\\n");
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lf_printf (file, "%sitable[MY_INDEX].name);\n",
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options.module.itable.prefix.l);
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lf_indent (file, -indent);
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lf_print__internal_ref (file);
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}
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/* Close off the conditional execution */
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if (filter_is_member (instruction->options, "c")
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|| options.gen.conditional_issue)
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{
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lf_indent (file, -4);
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lf_printf (file, " }\n");
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}
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}
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static void
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print_c_semantic (lf *file,
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const insn_entry *instruction,
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const opcode_bits *expanded_bits,
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const insn_opcodes *opcodes,
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cache_entry *cache_rules,
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int nr_prefetched_words)
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{
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lf_printf (file, "{\n");
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lf_indent (file, +2);
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print_my_defines (file,
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instruction->name,
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instruction->format_name, expanded_bits);
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lf_printf (file, "\n");
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print_icache_body (file,
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instruction,
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expanded_bits,
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cache_rules,
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(options.gen.direct_access
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? define_variables
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: declare_variables),
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(options.gen.icache
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? get_values_from_icache
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: do_not_use_icache), nr_prefetched_words);
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lf_printf (file, "%sinstruction_address nia;\n",
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options.module.global.prefix.l);
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print_semantic_body (file, instruction, expanded_bits, opcodes);
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lf_printf (file, "return nia;\n");
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/* generate something to clean up any #defines created for the cache */
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if (options.gen.direct_access)
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{
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print_icache_body (file,
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instruction,
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expanded_bits,
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cache_rules,
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undef_variables,
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(options.gen.icache
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? get_values_from_icache
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: do_not_use_icache), nr_prefetched_words);
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}
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lf_indent (file, -2);
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lf_printf (file, "}\n");
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}
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static void
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print_c_semantic_function (lf *file,
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const insn_entry *instruction,
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const opcode_bits *expanded_bits,
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const insn_opcodes *opcodes,
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cache_entry *cache_rules,
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int nr_prefetched_words)
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{
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/* build the semantic routine to execute the instruction */
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print_semantic_function_header (file,
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instruction->name,
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instruction->format_name,
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expanded_bits,
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1 /*is-function-definition */ ,
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nr_prefetched_words);
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print_c_semantic (file,
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instruction,
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expanded_bits, opcodes, cache_rules, nr_prefetched_words);
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}
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void
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print_semantic_definition (lf *file,
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const insn_entry *insn,
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const opcode_bits *expanded_bits,
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const insn_opcodes *opcodes,
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cache_entry *cache_rules,
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int nr_prefetched_words)
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{
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print_c_semantic_function (file,
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insn,
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expanded_bits,
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opcodes, cache_rules, nr_prefetched_words);
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}
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