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https://git.code.sf.net/p/quake/quakeforge
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5018f5147c
With temp types changing and temps being reused within the one instruction, the def type is no longer usable for selecting the opcode. However, the operand types are stable and more correct.
154 lines
3.8 KiB
C
154 lines
3.8 KiB
C
/*
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opcodes.c
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opcode searching
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Copyright (C) 2002 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2002/06/01
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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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#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/hash.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 "statements.h"
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#include "type.h"
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hashtab_t *opcode_type_table;
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hashtab_t *opcode_void_table;
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#define ROTL(x,n) ((((unsigned)(x))<<(n))|((unsigned)(x))>>(32-n))
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static uintptr_t
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get_hash (const void *_op, void *_tab)
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{
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opcode_t *op = (opcode_t *) _op;
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uintptr_t hash;
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hash = ROTL (~op->type_a, 8) + ROTL (~op->type_b, 16)
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+ ROTL (~op->type_c, 24);
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return hash + Hash_String (op->name);
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}
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static int
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compare (const void *_opa, const void *_opb, void *unused)
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{
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opcode_t *opa = (opcode_t *) _opa;
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opcode_t *opb = (opcode_t *) _opb;
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int cmp;
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cmp = (opa->type_a == opb->type_a)
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&& (opa->type_b == opb->type_b)
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&& (opa->type_c == opb->type_c);
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return cmp && !strcmp (opa->name, opb->name);
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}
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static const char *
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get_key (const void *op, void *unused)
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{
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return ((opcode_t *) op)->name;
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}
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static int
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check_operand_type (etype_t ot1, etype_t ot2)
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{
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if ((ot1 == ev_void && ot2 != ev_invalid)
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|| ot1 == ot2)
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return 1;
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return 0;
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}
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opcode_t *
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opcode_find (const char *name, operand_t *op_a, operand_t *op_b,
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operand_t *op_c)
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{
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opcode_t search_op;
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opcode_t *op;
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opcode_t *sop;
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void **op_list;
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int i;
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search_op.name = name;
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search_op.type_a = op_a ? op_a->type : ev_invalid;
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search_op.type_b = op_b ? op_b->type : ev_invalid;
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search_op.type_c = op_c ? op_c->type : ev_invalid;
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op = Hash_FindElement (opcode_type_table, &search_op);
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if (op)
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return op;
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op_list = Hash_FindList (opcode_void_table, name);
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if (!op_list)
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return op;
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for (i = 0; !op && op_list[i]; i++) {
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sop = op_list[i];
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if (check_operand_type (sop->type_a, search_op.type_a)
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&& check_operand_type (sop->type_b, search_op.type_b)
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&& check_operand_type (sop->type_c, search_op.type_c))
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op = sop;
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}
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free (op_list);
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return op;
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}
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void
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opcode_init (void)
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{
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opcode_t *op;
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PR_Opcode_Init ();
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opcode_type_table = Hash_NewTable (1021, 0, 0, 0);
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Hash_SetHashCompare (opcode_type_table, get_hash, compare);
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opcode_void_table = Hash_NewTable (1021, get_key, 0, 0);
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for (op = pr_opcodes; op->name; op++) {
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if (op->min_version > options.code.progsversion)
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continue;
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if (options.code.progsversion == PROG_ID_VERSION) {
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// v6 progs have no concept of integer, but the QF engine
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// treats the operands of certain operands as integers
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// irrespective the progs version, so convert the engine's
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// view of the operands to the prog's view.
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if (op->type_a == ev_integer)
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op->type_a = ev_float;
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if (op->type_b == ev_integer)
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op->type_b = ev_float;
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if (op->type_c == ev_integer)
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op->type_c = ev_float;
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}
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Hash_AddElement (opcode_type_table, op);
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if (op->type_a == ev_void || op->type_b == ev_void
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|| op->type_c == ev_void)
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Hash_Add (opcode_void_table, op);
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}
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}
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