mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2025-02-17 17:31:28 +00:00
cdea1d07aa
Separate compilation will take fixing object files. The generated code is broken due to various relocation fixups being broken, and float immediates seem to be badly broken. Debug information is broken too.
160 lines
3.7 KiB
C
160 lines
3.7 KiB
C
/*
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emit.c
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statement emittion
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2001/07/26
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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.
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See the 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, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((used)) const char rcsid[] = "$Id$";
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include <QF/mathlib.h>
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#include <QF/va.h>
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#include "codespace.h"
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#include "def.h"
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#include "defspace.h"
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#include "debug.h"
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#include "diagnostic.h"
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#include "emit.h"
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#include "function.h"
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#include "immediate.h"
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#include "opcodes.h"
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#include "options.h"
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#include "qfcc.h"
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#include "reloc.h"
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#include "statements.h"
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#include "symtab.h"
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#include "type.h"
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static def_t zero_def;
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static def_t *
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get_operand_def (operand_t *op)
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{
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def_t *def;
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if (!op)
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return 0;
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switch (op->op_type) {
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case op_symbol:
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switch (op->o.symbol->sy_type) {
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case sy_var:
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if (op->type != op->o.symbol->type->type)
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return alias_def (op->o.symbol->s.def,
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ev_types[op->type]);
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return op->o.symbol->s.def;
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case sy_func:
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return op->o.symbol->s.func->def;
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case sy_const:
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//FIXME
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case sy_type:
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case sy_expr:
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internal_error (0, "invalid operand type");
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}
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break;
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case op_value:
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//FIXME share immediates
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def = new_def (".imm", ev_types[op->type], pr.near_data,
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st_static);
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memcpy (D_POINTER (pr_type_t, def), &op->o.value,
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pr_type_size[op->type]);
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return def;
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case op_label:
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zero_def.type = &type_short;
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return &zero_def; //FIXME
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case op_temp:
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if (!op->o.def)
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op->o.def = new_def (".tmp", ev_types[op->type],
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current_func->symtab->space, st_local);
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return op->o.def;
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}
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return 0;
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}
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static void
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add_statement_ref (def_t *def, dstatement_t *st, int field)
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{
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if (def) {
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int st_ofs = st - pr.code->code;
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if (def->alias) {
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reloc_op_def (def->alias, st_ofs, field);
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free_def (def);
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} else {
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reloc_op_def (def, st_ofs, field);
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}
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}
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}
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static void
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emit_statement (statement_t *statement)
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{
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const char *opcode = statement->opcode;
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def_t *def_a = get_operand_def (statement->opa);
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def_t *def_b = get_operand_def (statement->opb);
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def_t *def_c = get_operand_def (statement->opc);
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opcode_t *op = opcode_find (opcode, def_a, def_b, def_c);
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dstatement_t *s;
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if (!op)
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internal_error (0, "ice ice baby");
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s = codespace_newstatement (pr.code);
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s->op = op->opcode;
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s->a = def_a ? def_a->offset : 0;
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s->b = def_b ? def_b->offset : 0;
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s->c = def_c ? def_c->offset : 0;
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add_statement_ref (def_a, s, 0);
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add_statement_ref (def_b, s, 0);
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add_statement_ref (def_c, s, 0);
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}
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void
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emit_statements (sblock_t *first_sblock)
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{
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sblock_t *sblock;
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statement_t *s;
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for (sblock = first_sblock; sblock; sblock = sblock->next) {
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sblock->offset = pr.code->size;
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for (s = sblock->statements; s; s = s->next)
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emit_statement (s);
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}
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for (sblock = first_sblock; sblock; sblock = sblock->next)
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relocate_refs (sblock->relocs, sblock->offset);
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}
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