view lwasm/insn_inh.c @ 543:e10618b48e68

Implement support for dragon format binaries Implement support for dragon format binaries. As an added bonus, also implement a variation on raw binaries which guarantees the whole binary fits in the file. These are the "dragon" and "abs" output formats. Based on code submitted by Mike Miller.
author William Astle <lost@l-w.ca>
date Thu, 29 Sep 2022 13:59:42 -0600
parents 4fd16faa4d93
children
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/*
insn_inh.c
Copyright © 2010 William Astle

This file is part of LWASM.

LWASM 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 3 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, see <http://www.gnu.org/licenses/>.

*/

#include "lwasm.h"
#include "instab.h"

PARSEFUNC(insn_parse_inh)
{
	l -> len = OPLEN(instab[l -> insn].ops[0]);
	skip_operand(p);
}

EMITFUNC(insn_emit_inh)
{
	lwasm_emitop(l, instab[l -> insn].ops[0]);
}

PARSEFUNC(insn_parse_inh6800)
{
	// there may be two operations here so check for both
	l -> len = OPLEN(instab[l -> insn].ops[0]);
	if (instab[l -> insn].ops[1] >= 0)
		l -> len += OPLEN(instab[l -> insn].ops[1]);
	skip_operand(p);
}

EMITFUNC(insn_emit_inh6800)
{
	// there may be two operations here so check for both
	lwasm_emitop(l, instab[l -> insn].ops[0]);
	if (instab[l -> insn].ops[1] >= 0)
		lwasm_emitop(l, instab[l -> insn].ops[1]);
	l -> cycle_base = instab[l -> insn].ops[3];
}

int negq_ops[] = { 0x10, 0x43, 0x10, 0x53, 0x10, 0x31, 0xc6, 0x10, 0x31, 0xc0 };
#define negq_size (sizeof(negq_ops)/sizeof(int))

PARSEFUNC(insn_parse_conv)
{
	int i;
	l -> len = 0;
	for (i = 0; i <= 2; i++)
	{
		if (instab[l -> insn].ops[i] >= 0)
			l -> len += OPLEN(instab[l -> insn].ops[i]);
	}

	/* negq */
	if (instab[l -> insn].ops[0] == -1)
		l -> len = negq_size;
	skip_operand(p);
}

EMITFUNC(insn_emit_conv)
{
	int i;
	for (i = 0; i <= 2; i++)
	{
		if (instab[l -> insn].ops[i] >= 0)
			lwasm_emitop(l, instab[l -> insn].ops[i]);
	}

	/* special case for negq */
	if (instab[l -> insn].ops[0] == -1)
	{
		// 1043   (2)  comd
		// 1053   (2)  comw
		// 1031C6 (4)  adcr 0,w
		// 1031C0 (4)  adcr 0,d

		for (i = 0; i < negq_size; i++)
			lwasm_emitop(l, negq_ops[i]);
	}

	l->cycle_base = instab[l -> insn].ops[3];
}