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Added string manipulation symbol names.

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This commit is contained in:
Anselm Levskaya 2011-12-22 09:01:41 -08:00
parent bcaaf741b9
commit 766a795930
2 changed files with 73 additions and 42 deletions
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95
cpux86-ta.js
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@ -32,10 +32,20 @@ Hints for Bit Twiddling
X & -65281 = mask for lower 8 bits for 32bit X
X & 3 = mask for lower 2 bits for single byte X
*/
var parity_bit_check_array = [1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1];
/* Parity Check by LUT:
static const bool ParityTable256[256] = {
# define P2(n) n, n^1, n^1, n
# define P4(n) P2(n), P2(n^1), P2(n^1), P2(n)
# define P6(n) P4(n), P4(n^1), P4(n^1), P4(n)
P6(0), P6(1), P6(1), P6(0) };
unsigned char b; // byte value to compute the parity of
bool parity = ParityTable256[b];
// OR, for 32-bit words: unsigned int v; v ^= v >> 16; v ^= v >> 8; bool parity = ParityTable256[v & 0xff];
// Variation: unsigned char * p = (unsigned char *) &v; parity = ParityTable256[p[0] ^ p[1] ^ p[2] ^ p[3]]; */
var parity_LUT = [1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1];
var used_by_shift16 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14];
var used_by_shift8 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4];
@ -50,13 +60,12 @@ function CPU_X86() {
DI/EDI/RDI: Destination index for string operations.
SP/ESP/RSP: Stack pointer for top address of the stack.
BP/EBP/RBP: Stack base pointer for holding the address of the current stack frame.
(((IP/EIP/RIP: Instruction pointer. Holds the program counter, the current instruction address.)))-->handled separately in "this.eip"
*/
this.regs = new Array(); // EAX, EBX, ECX, EDX, ESI, EDI, ESP, EBP 32bit registers
for (i = 0; i < 8; i++) {
this.regs[i] = 0;
}
/* IP/EIP/RIP: Instruction pointer. Holds the program counter, the current instruction address. */
this.eip = 0; //instruction pointer
this.cc_op = 0; // current op
this.cc_dst = 0; // current dest
@ -1904,7 +1913,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
if (_op == 24) {
return (_src >> 2) & 1;
} else {
return parity_bit_check_array[_dst & 0xff];
return parity_LUT[_dst & 0xff];
}
}
function cd() {
@ -4645,7 +4654,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
}
regs[0] = (regs[0] & ~0xff) | wf;
jd |= (wf == 0) << 6;
jd |= parity_bit_check_array[wf] << 2;
jd |= parity_LUT[wf] << 2;
jd |= (wf & 0x80);
_src = jd;
_dst = ((_src >> 6) & 1) ^ 1;
@ -4671,7 +4680,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
}
regs[0] = (regs[0] & ~0xff) | wf;
jd |= (wf == 0) << 6;
jd |= parity_bit_check_array[wf] << 2;
jd |= parity_LUT[wf] << 2;
jd |= (wf & 0x80);
_src = jd;
_dst = ((_src >> 6) & 1) ^ 1;
@ -4863,7 +4872,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
Ie(Sb, y);
set_lower_two_bytes_of_register((mem8 >> 3) & 7, x);
}
function Wf() {
function stringOp_INSB() {
var Xf, Yf, Zf, ag, iopl, x;
iopl = (cpu.eflags >> 12) & 3;
if (cpu.cpl > iopl)
@ -4892,7 +4901,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 0)) & Xf);
}
}
function bg() {
function stringOp_OUTSB() {
var Xf, cg, Sb, ag, Zf, iopl, x;
iopl = (cpu.eflags >> 12) & 3;
if (cpu.cpl > iopl)
@ -4926,7 +4935,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[6] = (cg & ~Xf) | ((cg + (cpu.df << 0)) & Xf);
}
}
function dg() {
function stringOp_MOVSB() {
var Xf, Yf, cg, ag, Sb, eg;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -4963,7 +4972,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 0)) & Xf);
}
}
function fg() {
function stringOp_STOSB() {
var Xf, Yf, ag;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -4987,7 +4996,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 0)) & Xf);
}
}
function gg() {
function stringOp_CMPSB() {
var Xf, Yf, cg, ag, Sb, eg;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5031,7 +5040,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 0)) & Xf);
}
}
function hg() {
function stringOp_LODSB() {
var Xf, cg, Sb, ag, x;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5060,7 +5069,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[6] = (cg & ~Xf) | ((cg + (cpu.df << 0)) & Xf);
}
}
function ig() {
function stringOp_SCASB() {
var Xf, Yf, ag, x;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5319,7 +5328,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 1)) & Xf);
}
}
function qg() {
function stringOp_INSD() {
var Xf, Yf, Zf, ag, iopl, x;
iopl = (cpu.eflags >> 12) & 3;
if (cpu.cpl > iopl)
@ -5348,7 +5357,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 2)) & Xf);
}
}
function rg() {
function stringOp_OUTSD() {
var Xf, cg, Sb, ag, Zf, iopl, x;
iopl = (cpu.eflags >> 12) & 3;
if (cpu.cpl > iopl)
@ -5382,7 +5391,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[6] = (cg & ~Xf) | ((cg + (cpu.df << 2)) & Xf);
}
}
function sg() {
function stringOp_MOVSD() {
var Xf, Yf, cg, ag, Sb, eg;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5440,7 +5449,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 2)) & Xf);
}
}
function xg() {
function stringOp_STOSD() {
var Xf, Yf, ag;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5480,7 +5489,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 2)) & Xf);
}
}
function yg() {
function stringOp_CMPSD() {
var Xf, Yf, cg, ag, Sb, eg;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5524,7 +5533,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[7] = (Yf & ~Xf) | ((Yf + (cpu.df << 2)) & Xf);
}
}
function zg() {
function stringOp_LODSD() {
var Xf, cg, Sb, ag, x;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -5553,7 +5562,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
regs[6] = (cg & ~Xf) | ((cg + (cpu.df << 2)) & Xf);
}
}
function Ag() {
function stringOp_SCASD() {
var Xf, Yf, ag, x;
if (CS_flags & 0x0080)
Xf = 0xffff;
@ -7252,58 +7261,58 @@ CPU_X86.prototype.exec_internal = function(N_cycles, va) {
exit_code = 257;
break Bg;
case 0xa4://MOVS (DS:)[rSI] (ES:)[rDI] Move Data from String to String
dg();
stringOp_MOVSB();
break Fd;
case 0xa5://MOVS DS:[SI] ES:[DI] Move Data from String to String
sg();
stringOp_MOVSD();
break Fd;
case 0xaa://STOS AL (ES:)[rDI] Store String
fg();
stringOp_STOSB();
break Fd;
case 0xab://STOS AX ES:[DI] Store String
xg();
stringOp_STOSD();
break Fd;
case 0xa6://CMPS (ES:)[rDI] Compare String Operands
gg();
stringOp_CMPSB();
break Fd;
case 0xa7://CMPS ES:[DI] Compare String Operands
yg();
stringOp_CMPSD();
break Fd;
case 0xac://LODS (DS:)[rSI] AL Load String
hg();
stringOp_LODSB();
break Fd;
case 0xad://LODS DS:[SI] AX Load String
zg();
stringOp_LODSD();
break Fd;
case 0xae://SCAS (ES:)[rDI] Scan String
ig();
stringOp_SCASB();
break Fd;
case 0xaf://SCAS ES:[DI] Scan String
Ag();
stringOp_SCASD();
break Fd;
case 0x6c://INS DX (ES:)[rDI] Input from Port to String
Wf();
stringOp_INSB();
{
if (cpu.hard_irq != 0 && (cpu.eflags & 0x00000200))
break Bg;
}
break Fd;
case 0x6d://INS DX ES:[DI] Input from Port to String
qg();
stringOp_INSD();
{
if (cpu.hard_irq != 0 && (cpu.eflags & 0x00000200))
break Bg;
}
break Fd;
case 0x6e://OUTS (DS):[rSI] DX Output String to Port
bg();
stringOp_OUTSB();
{
if (cpu.hard_irq != 0 && (cpu.eflags & 0x00000200))
break Bg;
}
break Fd;
case 0x6f://OUTS DS:[SI] DX Output String to Port
rg();
stringOp_OUTSD();
{
if (cpu.hard_irq != 0 && (cpu.eflags & 0x00000200))
break Bg;
@ -9415,3 +9424,19 @@ CPU_X86.prototype.load_binary = function(Gg, mem8_loc) {
}
return tg;
};

20
readme.md
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@ -22,13 +22,19 @@ There's no alteration in the algorithmic content. I do check that that it still
### References
Some other helpful references for understanding what's going on:
http://ref.x86asm.net/coder32.html#xC4
http://en.wikibooks.org/wiki/X86_Assembly/X86_Architecture
http://en.wikipedia.org/wiki/X86
http://en.wikipedia.org/wiki/Control_register
http://en.wikipedia.org/wiki/X86_assembly_language
http://en.wikipedia.org/wiki/Translation_lookaside_buffer
http://en.wikibooks.org/wiki/Serial_Programming/8250_UART_Programming
#### x86
- http://ref.x86asm.net/coder32.html
- http://en.wikibooks.org/wiki/X86_Assembly/X86_Architecture
- http://en.wikipedia.org/wiki/X86
- http://en.wikipedia.org/wiki/Control_register
- http://en.wikipedia.org/wiki/X86_assembly_language
- http://en.wikipedia.org/wiki/Translation_lookaside_buffer
#### Bit Hacking
- http://graphics.stanford.edu/~seander/bithacks.html
#### Other devices
- http://en.wikibooks.org/wiki/Serial_Programming/8250_UART_Programming
[1]: http://bellard.org/jslinux/tech.html
[2]: http://sshaper.org