minivmac4ios/Mini vMac/mnvm_core/M68KITAB.c

/*
	M68KITAB.c

	Copyright (C) 2007 Paul C. Pratt

	You can redistribute this file and/or modify it under the terms
	of version 2 of the GNU General Public License as published by
	the Free Software Foundation.  You should have received a copy
	of the license along with this file; see the file COPYING.

	This file 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
	license for more details.
*/

/*
	Motorola 68K Instructions TABle
*/

#ifndef AllFiles
#include "SYSDEPNS.h"
#endif

#include "MYOSGLUE.h"
#include "EMCONFIG.h"
#include "GLOBGLUE.h"

#include "M68KITAB.h"

struct WorkR {
	/* expected size : 8 bytes */
	ui5b opcode;
	ui5b opsize;
	ui4r MainClass;
#if WantCycByPriOp
	ui4r Cycles;
#endif
	DecOpR DecOp;
};
typedef struct WorkR WorkR;

#define b76(p) ((p->opcode >> 6) & 3)
#define b8(p) ((p->opcode >> 8) & 1)
#define mode(p) ((p->opcode >> 3) & 7)
#define reg(p) (p->opcode & 7)
#define md6(p) ((p->opcode >> 6) & 7)
#define rg9(p) ((p->opcode >> 9) & 7)

enum {
	kAddrValidAny,
	kAddrValidData,
	kAddrValidDataAlt,
	kAddrValidControl,
	kAddrValidControlAlt,
	kAddrValidAltMem,
	kAddrValidDataNoCn, /* no constants (immediate data) */

	kNumAddrValids
};

#define kAddrValidMaskAny        (1 << kAddrValidAny)
#define kAddrValidMaskData       (1 << kAddrValidData)
#define kAddrValidMaskDataAlt    (1 << kAddrValidDataAlt)
#define kAddrValidMaskControl    (1 << kAddrValidControl)
#define kAddrValidMaskControlAlt (1 << kAddrValidControlAlt)
#define kAddrValidMaskAltMem     (1 << kAddrValidAltMem)
#define kAddrValidMaskDataNoCn   (1 << kAddrValidDataNoCn)

#define CheckInSet(v, m) (0 != ((1 << (v)) & (m)))

#define kMyAvgCycPerInstr (10 * kCycleScale + (40 * kCycleScale / 64))

LOCALFUNC ui3r GetAMdRegSz(WorkR *p)
{
	ui3r CurAMd;

	switch (p->opsize) {
		case 1:
			CurAMd = kAMdRegB;
			break;
		case 2:
		default: /* keep compiler happy */
			CurAMd = kAMdRegW;
			break;
		case 4:
			CurAMd = kAMdRegL;
			break;
	}

	return CurAMd;
}

LOCALFUNC ui3r GetAMdIndirectSz(WorkR *p)
{
	ui3r CurAMd;

	switch (p->opsize) {
		case 1:
			CurAMd = kAMdIndirectB;
			break;
		case 2:
		default: /* keep compiler happy */
			CurAMd = kAMdIndirectW;
			break;
		case 4:
			CurAMd = kAMdIndirectL;
			break;
	}

	return CurAMd;
}

#if WantCycByPriOp
LOCALFUNC ui4r OpEACalcCyc(WorkR *p, ui3r m, ui3r r)
{
	ui4r v;

	switch (m) {
		case 0:
		case 1:
			v = 0;
			break;
		case 2:
			v = ((4 == p->opsize)
				? (8 * kCycleScale + 2 * RdAvgXtraCyc)
				: (4 * kCycleScale + RdAvgXtraCyc));
			break;
		case 3:
			v = ((4 == p->opsize)
				? (8 * kCycleScale + 2 * RdAvgXtraCyc)
				: (4 * kCycleScale + RdAvgXtraCyc));
			break;
		case 4:
			v = ((4 == p->opsize)
				? (10 * kCycleScale + 2 * RdAvgXtraCyc)
				: (6 * kCycleScale + RdAvgXtraCyc));
			break;
		case 5:
			v = ((4 == p->opsize)
				? (12 * kCycleScale + 3 * RdAvgXtraCyc)
				: (8 * kCycleScale + 2 * RdAvgXtraCyc));
			break;
		case 6:
			v = ((4 == p->opsize)
				? (14 * kCycleScale + 3 * RdAvgXtraCyc)
				: (10 * kCycleScale + 2 * RdAvgXtraCyc));
			break;
		case 7:
			switch (r) {
				case 0:
					v = ((4 == p->opsize)
						? (12 * kCycleScale + 3 * RdAvgXtraCyc)
						: (8 * kCycleScale + 2 * RdAvgXtraCyc));
					break;
				case 1:
					v = ((4 == p->opsize)
						? (16 * kCycleScale + 4 * RdAvgXtraCyc)
						: (12 * kCycleScale + 3 * RdAvgXtraCyc));
					break;
				case 2:
					v = ((4 == p->opsize)
						? (12 * kCycleScale + 3 * RdAvgXtraCyc)
						: (8 * kCycleScale + 2 * RdAvgXtraCyc));
					break;
				case 3:
					v = ((4 == p->opsize)
						? (14 * kCycleScale + 3 * RdAvgXtraCyc)
						: (10 * kCycleScale + 2 * RdAvgXtraCyc));
					break;
				case 4:
					v = ((4 == p->opsize)
						? (8 * kCycleScale + 2 * RdAvgXtraCyc)
						: (4 * kCycleScale + RdAvgXtraCyc));
					break;
				default:
					v = 0;
					break;
			}
			break;
		default: /* keep compiler happy */
			v = 0;
			break;
	}

	return v;
}
#endif

#if WantCycByPriOp
LOCALFUNC ui4r OpEADestCalcCyc(