x86Lib - I\'ve ported my library x86Lib to mbed. It fully …

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I\'ve ported my library x86Lib to mbed. It fully emulates the 8086 processor, but a few things I\'m still working on. Notable missing things are interrupts. Previously I used exceptions for interrupts, but exceptions aren\'t supported with the mbed compiler. It is also quite slow

Dependents: x86Lib_Tester

ops/flags.cpp@0:217a7931b41f, 2012-03-04 (annotated)

Committer:: earlz
Date:: Sun Mar 04 08:15:47 2012 +0000
Revision:: 0:217a7931b41f

Who changed what in which revision?

User	Revision	Line number	New contents of line
earlz	0:217a7931b41f	1	/**
earlz	0:217a7931b41f	2	Copyright (c) 2007 - 2009 Jordan "Earlz/hckr83" Earls <http://www.Earlz.biz.tm>
earlz	0:217a7931b41f	3	All rights reserved.
earlz	0:217a7931b41f	4
earlz	0:217a7931b41f	5	Redistribution and use in source and binary forms, with or without
earlz	0:217a7931b41f	6	modification, are permitted provided that the following conditions
earlz	0:217a7931b41f	7	are met:
earlz	0:217a7931b41f	8
earlz	0:217a7931b41f	9	1. Redistributions of source code must retain the above copyright
earlz	0:217a7931b41f	10	notice, this list of conditions and the following disclaimer.
earlz	0:217a7931b41f	11	2. Redistributions in binary form must reproduce the above copyright
earlz	0:217a7931b41f	12	notice, this list of conditions and the following disclaimer in the
earlz	0:217a7931b41f	13	documentation and/or other materials provided with the distribution.
earlz	0:217a7931b41f	14	3. The name of the author may not be used to endorse or promote products
earlz	0:217a7931b41f	15	derived from this software without specific prior written permission.
earlz	0:217a7931b41f	16
earlz	0:217a7931b41f	17	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
earlz	0:217a7931b41f	18	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
earlz	0:217a7931b41f	19	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
earlz	0:217a7931b41f	20	THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
earlz	0:217a7931b41f	21	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
earlz	0:217a7931b41f	22	PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
earlz	0:217a7931b41f	23	OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
earlz	0:217a7931b41f	24	WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
earlz	0:217a7931b41f	25	OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
earlz	0:217a7931b41f	26	ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
earlz	0:217a7931b41f	27
earlz	0:217a7931b41f	28	This file is part of the x86Lib project.
earlz	0:217a7931b41f	29	**/
earlz	0:217a7931b41f	30	#define X86LIB_BUILD
earlz	0:217a7931b41f	31	#include <x86Lib.h>
earlz	0:217a7931b41f	32	namespace x86Lib{
earlz	0:217a7931b41f	33	using namespace std;
earlz	0:217a7931b41f	34
earlz	0:217a7931b41f	35	//jmp rel8 jcc stuff
earlz	0:217a7931b41f	36	void x86CPU::op16_ja_rel8(){ //is also jnbe
earlz	0:217a7931b41f	37	eip++;
earlz	0:217a7931b41f	38	if(freg.cf==0 && freg.zf==0){
earlz	0:217a7931b41f	39	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	40	}
earlz	0:217a7931b41f	41	}
earlz	0:217a7931b41f	42
earlz	0:217a7931b41f	43	void x86CPU::op16_jnc_rel8(){ //is also jae and jnb
earlz	0:217a7931b41f	44	eip++;
earlz	0:217a7931b41f	45	if(freg.cf==0){
earlz	0:217a7931b41f	46	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	47	}
earlz	0:217a7931b41f	48	}
earlz	0:217a7931b41f	49
earlz	0:217a7931b41f	50
earlz	0:217a7931b41f	51	void x86CPU::op16_jbe_rel8(){ //is also jna
earlz	0:217a7931b41f	52	eip++;
earlz	0:217a7931b41f	53	if(freg.cf==1 \|\| freg.zf==1){
earlz	0:217a7931b41f	54	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	55	}else{
earlz	0:217a7931b41f	56	eip++;
earlz	0:217a7931b41f	57	}
earlz	0:217a7931b41f	58	}
earlz	0:217a7931b41f	59
earlz	0:217a7931b41f	60	void x86CPU::op16_jc_rel8(){ //is also jb and jnae
earlz	0:217a7931b41f	61	eip++;
earlz	0:217a7931b41f	62	if(freg.cf==1){
earlz	0:217a7931b41f	63	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	64	}
earlz	0:217a7931b41f	65	}
earlz	0:217a7931b41f	66
earlz	0:217a7931b41f	67	void x86CPU::op16_jz_rel8(){ //is also je
earlz	0:217a7931b41f	68	eip++;
earlz	0:217a7931b41f	69	if(freg.zf==1){
earlz	0:217a7931b41f	70	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	71	}
earlz	0:217a7931b41f	72	}
earlz	0:217a7931b41f	73
earlz	0:217a7931b41f	74	void x86CPU::op16_jnz_rel8(){ //is also jne
earlz	0:217a7931b41f	75	eip++;
earlz	0:217a7931b41f	76	if(freg.zf==0){
earlz	0:217a7931b41f	77	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	78	}
earlz	0:217a7931b41f	79	}
earlz	0:217a7931b41f	80
earlz	0:217a7931b41f	81
earlz	0:217a7931b41f	82	void x86CPU::op16_jp_rel8(){ //also jpe
earlz	0:217a7931b41f	83	eip++;
earlz	0:217a7931b41f	84	if(freg.pf==1){
earlz	0:217a7931b41f	85	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	86	}
earlz	0:217a7931b41f	87	}
earlz	0:217a7931b41f	88
earlz	0:217a7931b41f	89	void x86CPU::op16_jnp_rel8(){ //is also jpo
earlz	0:217a7931b41f	90	eip++;
earlz	0:217a7931b41f	91	if(freg.pf==0){
earlz	0:217a7931b41f	92	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	93	}
earlz	0:217a7931b41f	94	}
earlz	0:217a7931b41f	95
earlz	0:217a7931b41f	96	void x86CPU::op16_jg_rel8(){ //is also jnle
earlz	0:217a7931b41f	97	eip++;
earlz	0:217a7931b41f	98	if(freg.sf==freg.of && freg.zf==0){
earlz	0:217a7931b41f	99	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	100	}
earlz	0:217a7931b41f	101	}
earlz	0:217a7931b41f	102
earlz	0:217a7931b41f	103
earlz	0:217a7931b41f	104	void x86CPU::op16_jge_rel8(){ //is also jnl
earlz	0:217a7931b41f	105	eip++;
earlz	0:217a7931b41f	106	if(freg.sf==freg.of){
earlz	0:217a7931b41f	107	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	108	}
earlz	0:217a7931b41f	109	}
earlz	0:217a7931b41f	110
earlz	0:217a7931b41f	111	void x86CPU::op16_jle_rel8(){ //is also jng
earlz	0:217a7931b41f	112	eip++;
earlz	0:217a7931b41f	113	if(freg.sf!=freg.of \|\| freg.zf==1){
earlz	0:217a7931b41f	114	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	115	}
earlz	0:217a7931b41f	116	}
earlz	0:217a7931b41f	117
earlz	0:217a7931b41f	118	void x86CPU::op16_jl_rel8(){ //is also jnge
earlz	0:217a7931b41f	119	eip++;
earlz	0:217a7931b41f	120	if(freg.sf!=freg.of){
earlz	0:217a7931b41f	121	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	122	}
earlz	0:217a7931b41f	123	}
earlz	0:217a7931b41f	124
earlz	0:217a7931b41f	125
earlz	0:217a7931b41f	126	void x86CPU::op16_jo_rel8(){
earlz	0:217a7931b41f	127	eip++;
earlz	0:217a7931b41f	128	if(freg.of==1){
earlz	0:217a7931b41f	129	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	130	}
earlz	0:217a7931b41f	131	}
earlz	0:217a7931b41f	132
earlz	0:217a7931b41f	133	void x86CPU::op16_jno_rel8(){
earlz	0:217a7931b41f	134	eip++;
earlz	0:217a7931b41f	135	if(freg.of==0){
earlz	0:217a7931b41f	136	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	137	}
earlz	0:217a7931b41f	138	}
earlz	0:217a7931b41f	139
earlz	0:217a7931b41f	140	void x86CPU::op16_js_rel8(){ //is negative
earlz	0:217a7931b41f	141	eip++;
earlz	0:217a7931b41f	142	if(freg.sf==1){
earlz	0:217a7931b41f	143	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	144	}
earlz	0:217a7931b41f	145	}
earlz	0:217a7931b41f	146
earlz	0:217a7931b41f	147	void x86CPU::op16_jns_rel8(){ //is positive
earlz	0:217a7931b41f	148	eip++;
earlz	0:217a7931b41f	149	if(freg.sf==0){
earlz	0:217a7931b41f	150	Jmp16_near8(op_cache[1]);
earlz	0:217a7931b41f	151	}
earlz	0:217a7931b41f	152	}
earlz	0:217a7931b41f	153
earlz	0:217a7931b41f	154
earlz	0:217a7931b41f	155
earlz	0:217a7931b41f	156	void x86CPU::op16_clc(){
earlz	0:217a7931b41f	157	freg.cf=0;
earlz	0:217a7931b41f	158	}
earlz	0:217a7931b41f	159
earlz	0:217a7931b41f	160	void x86CPU::op16_cld(){
earlz	0:217a7931b41f	161	freg.df=0;
earlz	0:217a7931b41f	162	}
earlz	0:217a7931b41f	163
earlz	0:217a7931b41f	164	void x86CPU::op16_cli(){
earlz	0:217a7931b41f	165	freg._if=0;
earlz	0:217a7931b41f	166	}
earlz	0:217a7931b41f	167
earlz	0:217a7931b41f	168	void x86CPU::op16_stc(){
earlz	0:217a7931b41f	169	freg.cf=1;
earlz	0:217a7931b41f	170	}
earlz	0:217a7931b41f	171
earlz	0:217a7931b41f	172	void x86CPU::op16_std(){
earlz	0:217a7931b41f	173	freg.df=1;
earlz	0:217a7931b41f	174	}
earlz	0:217a7931b41f	175
earlz	0:217a7931b41f	176	void x86CPU::op16_sti(){
earlz	0:217a7931b41f	177	freg._if=1;
earlz	0:217a7931b41f	178	}
earlz	0:217a7931b41f	179
earlz	0:217a7931b41f	180
earlz	0:217a7931b41f	181	void x86CPU::op16_cmc(){
earlz	0:217a7931b41f	182	freg.cf=freg.cf^1;
earlz	0:217a7931b41f	183	}
earlz	0:217a7931b41f	184
earlz	0:217a7931b41f	185	void x86CPU::op16_lahf(){
earlz	0:217a7931b41f	186	regs8[AL]=(uint8_t*)&freg;
earlz	0:217a7931b41f	187	}
earlz	0:217a7931b41f	188	void x86CPU::op16_sahf(){
earlz	0:217a7931b41f	189	(uint8_t)&freg=*regs8[AL];
earlz	0:217a7931b41f	190	}
earlz	0:217a7931b41f	191
earlz	0:217a7931b41f	192
earlz	0:217a7931b41f	193
earlz	0:217a7931b41f	194
earlz	0:217a7931b41f	195
earlz	0:217a7931b41f	196
earlz	0:217a7931b41f	197
earlz	0:217a7931b41f	198
earlz	0:217a7931b41f	199
earlz	0:217a7931b41f	200
earlz	0:217a7931b41f	201
earlz	0:217a7931b41f	202	};
earlz	0:217a7931b41f	203
earlz	0:217a7931b41f	204
earlz	0:217a7931b41f	205

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Type:	Library
Created:	04 Mar 2012
Imports:	8
Forks:	0
Commits:	1
Dependents:	1
Dependencies:	0
Followers:	3

ops/flags.cpp@0:217a7931b41f, 2012-03-04 (annotated)

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