#include "opcode.h"
#include <string.h>
#define SETOP(num, _mne, _IMM, _ZM, _ZMX, _ZMY, _ABS, _IMPL) \
{opcodes[num].mnemonic[3] = '\0'; strncpy(opcodes[num].mnemonic, _mne, 3); \
opcodes[num].imm = _IMM; \
opcodes[num].zm = _ZM; opcodes[num].zmx = _ZMX; opcodes[num].zmy = _ZMY; \
opcodes[num].abs = _ABS; opcodes[num].impl = _IMPL;}
int asmmon() {
opent opcodes[79];
SETOP(0, "CPS", 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(1, "ADC", 0x01, 0x05, 0x00, 0x00, 0x03, 0x00);
SETOP(2, "PHP", 0x08, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(3, "PHA", 0x09, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(4, "PHY", 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(5, "PHX", 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(6, "JMP", 0x00, 0xD0, 0x00, 0x00, 0x10, 0x00);
SETOP(7, "SBC", 0x11, 0x15, 0x00, 0x00, 0x13, 0x00);
SETOP(8, "PLP", 0x18, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(9, "PLA", 0x19, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(10, "PLY", 0x1A, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(11, "PLX", 0x1C, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(12, "JSR", 0x00, 0x20, 0x00, 0x00, 0x00, 0x00);
SETOP(13, "AND", 0x21, 0x2B, 0x00, 0x00, 0x29, 0x00);
SETOP(14, "ANY", 0x22, 0x82, 0x00, 0x00, 0x52, 0x00);
SETOP(15, "AAY", 0x00, 0x00, 0x00, 0x00, 0x00, 0x23);
SETOP(16, "ANX", 0x24, 0x84, 0x00, 0x00, 0x54, 0x00);
SETOP(17, "AAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0x25);
SETOP(18, "STT", 0x28, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(19, "BPO", 0x00, 0x00, 0x00, 0x00, 0x30, 0x00);
SETOP(20, "ORA", 0x31, 0x3B, 0x00, 0x00, 0x39, 0x00);
SETOP(21, "ORY", 0x32, 0x00, 0x00, 0x00, 0x62, 0x00);
SETOP(22, "OAY", 0x00, 0x00, 0x00, 0x00, 0x00, 0x33);
SETOP(23, "ORX", 0x34, 0x94, 0x00, 0x00, 0x64, 0x00);
SETOP(24, "OAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0x35);
SETOP(25, "SEI", 0x00, 0x00, 0x00, 0x00, 0x00, 0x38);
SETOP(26, "BNG", 0x00, 0x00, 0x00, 0x00, 0x40, 0x00);
SETOP(27, "XOR", 0x41, 0x4B, 0x00, 0x00, 0x49, 0x00);
SETOP(28, "XRY", 0x42, 0xA2, 0x00, 0x00, 0x72, 0x00);
SETOP(29, "XAY", 0x00, 0x00, 0x00, 0x00, 0x00, 0x43);
SETOP(30, "XRX", 0x44, 0xA4, 0x00, 0x00, 0x74, 0x00);
SETOP(31, "XAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0x45);
SETOP(32, "CLI", 0x00, 0x00, 0x00, 0x00, 0x00, 0x48);
SETOP(33, "BCS", 0x00, 0x00, 0x00, 0x00, 0x50, 0x00);
SETOP(34, "LSL", 0x51, 0x55, 0x00, 0x00, 0x53, 0x00);
SETOP(35, "SEC", 0x00, 0x00, 0x00, 0x00, 0x00, 0x58);
SETOP(36, "STA", 0x00, 0x7B, 0x8B, 0x9B, 0x5B, 0x00);
SETOP(37, "STY", 0x00, 0x7D, 0x8D, 0x00, 0x5D, 0x00);
SETOP(38, "STX", 0x00, 0x7E, 0x00, 0x9E, 0x5E, 0x00);
SETOP(39, "BCC", 0x00, 0x00, 0x00, 0x00, 0x60, 0x00);
SETOP(40, "LSR", 0x61, 0x65, 0x00, 0x00, 0x63, 0x00);
SETOP(41, "CLC", 0x00, 0x00, 0x00, 0x00, 0x00, 0x68);
SETOP(42, "LDA", 0x69, 0x79, 0x89, 0x99, 0x59, 0x00);
SETOP(43, "LDY", 0x6A, 0x7A, 0x8A, 0x00, 0x5A, 0x00);
SETOP(44, "LDX", 0x6C, 0x7C, 0x00, 0x9C, 0x5C, 0x00);
SETOP(45, "BEQ", 0x00, 0x00, 0x00, 0x00, 0x70, 0x00);
SETOP(46, "ROL", 0x71, 0x75, 0x00, 0x00, 0x73, 0x00);
SETOP(47, "SSP", 0x00, 0x00, 0x00, 0x00, 0x00, 0x78);
SETOP(48, "BNE", 0x00, 0x00, 0x00, 0x00, 0x80, 0x00);
SETOP(49, "ROL", 0x81, 0x85, 0x00, 0x00, 0x83, 0x00);
SETOP(50, "CSP", 0x00, 0x00, 0x00, 0x00, 0x00, 0x88);
SETOP(51, "BVS", 0x00, 0x00, 0x00, 0x00, 0x90, 0x00);
SETOP(52, "MUL", 0x91, 0x95, 0x00, 0x00, 0x93, 0x00);
SETOP(53, "SEV", 0x00, 0x00, 0x00, 0x00, 0x00, 0x98);
SETOP(54, "BVC", 0x00, 0x00, 0x00, 0x00, 0xA0, 0x00);
SETOP(55, "DIV", 0xA1, 0xA5, 0x00, 0x00, 0xA3, 0x00);
SETOP(56, "CLV", 0x00, 0x00, 0x00, 0x00, 0x00, 0xA8);
SETOP(57, "RTS", 0x00, 0x00, 0x00, 0x00, 0x00, 0xB0);
SETOP(58, "CMP", 0xB1, 0xF5, 0x00, 0x00, 0xE5, 0x00);
SETOP(59, "CPY", 0xB2, 0xF2, 0x00, 0x00, 0xE2, 0x00);
SETOP(60, "CAY", 0x00, 0x00, 0x00, 0x00, 0x00, 0xB3);
SETOP(61, "CPX", 0xB4, 0xF4, 0x00, 0x00, 0xE4, 0x00);
SETOP(62, "CAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0xB5);
SETOP(63, "ENT", 0xB8, 0x00, 0x00, 0x00, 0x00, 0x00);
SETOP(64, "RTI", 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0);
SETOP(65, "INC", 0x00, 0xE3, 0x00, 0x00, 0xE1, 0xC1);
SETOP(66, "INY", 0x00, 0x00, 0x00, 0x00, 0x00, 0xC2);
SETOP(67, "IAY", 0x00, 0x00, 0x00, 0x00, 0x00, 0xC3);
SETOP(68, "INX", 0x00, 0x00, 0x00, 0x00, 0x00, 0xC4);
SETOP(69, "IAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0xC5);
SETOP(70, "DEC", 0x00, 0x00, 0x00, 0x00, 0x00, 0xD1);
SETOP(71, "DEY", 0x00, 0x00, 0x00, 0x00, 0x00, 0xD2);
SETOP(72, "DAY", 0x00, 0xF3, 0x00, 0x00, 0xF1, 0xD3);
SETOP(73, "DEX", 0x00, 0x00, 0x00, 0x00, 0x00, 0xD4);
SETOP(74, "DAX", 0x00, 0x00, 0x00, 0x00, 0x00, 0xD5);
SETOP(75, "JSL", 0x00, 0x00, 0x00, 0x00, 0xE0, 0x00);
SETOP(76, "NOP", 0x00, 0x00, 0x00, 0x00, 0x00, 0xE8);
SETOP(77, "RTL", 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0);
SETOP(78, "BRK", 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8);
uint8_t done = 0;
uint64_t address = 0x0000;
while (!(done & 1)) {
char *buf = NULL;
char *ins;
char *postfix;
char mode[3];
opent op;
uint8_t addrmode = 0;
uint64_t value;
char *oprand;
char *cmd;
char *tmp = malloc(sizeof(char *)*128);
size_t size;
done &= ~6;
getline(&buf, &size, stdin);
cmd = strtok_r(buf, "\n", &tmp);
if (cmd != NULL) {
if (strcasecmp(cmd, "done") == 0) {
done |= 1;
} else {
ins = strtok(buf, " \n\t");
if (ins != NULL) {
oprand = strtok(NULL, "\t\n;, ");
strtok_r(ins, ".", &postfix);
}
if (strcasecmp(cmd, "quit") == 0 || strcasecmp(cmd, "q") == 0)
return 2;
if (strcasecmp(cmd, "viewmem") == 0) {
done |= 4;
printf("\t\t\t");
for (int ind = 0; ind < 0x10; ind++) {
printf("%02x", ind);
if (ind < 0x0F)
printf(" ");
}
printf("\n\n");
for (int hi = 0; hi < 0x10; hi++) {
printf("%016llx:\t", (address & ~0xF)+(hi*0x10));
for (int lo = 0; lo < 0x10; lo++) {
printf("%02x", addr[(address & ~0xF)+lo+(hi*0x10)]);
if (lo < 0x0F)
printf(" ");
}
printf("\n");
}
}
if (oprand == NULL && ins == NULL && postfix == NULL) {
done |= 2;
}
if (ins != NULL) {
for (int i = 0; i < strlen(ins); i++) {
if (ins[i] == ';') {
done |=6;
break;
}
}
if (strcasecmp(ins, ".org") == 0) {
done |= 6;
oprand = strtok(oprand, "$");
address = strtoull(oprand, NULL, 16);
printf("Origin for program code is now at address $%llx.\n", address);
}
if (strcasecmp(ins, ".byte") == 0 || strcasecmp(ins, ".word") == 0 || strcasecmp(ins, ".dword") == 0 || strcasecmp(ins, ".qword") == 0) {
done |= 6;
oprand = strtok(oprand, "$");
value = strtoull(oprand, NULL, 16);
if (strcasecmp(ins, ".byte") == 0)
addr[address++] = value & 0xFF;
if (strcasecmp(ins, ".word") == 0) {
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
address+=2;
}
if (strcasecmp(ins, ".dword") == 0) {
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
address+=4;
}
if (strcasecmp(ins, ".qword") == 0) {
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
addr[address+4] = value >> 32;
addr[address+5] = value >> 40;
addr[address+6] = value >> 48;
addr[address+7] = value >> 56;
address+=8;
}
printf("The value $%llx was placed at address $%llx.\n", value, address);
}
}
if (!(done & 2) && oprand != NULL) {
if (oprand[0] == '#' || oprand[0] == '$') {
if(oprand[0] == '#' && (oprand[1] == '$' || oprand[1] == '%')) {
mode[1] = oprand[1];
mode[2] = '\0';
} else {
mode[1] = '\0';
}
mode[0] = oprand[0];
oprand = strtok(oprand, "#$%");
if (mode[0] == '#') {
addrmode = 1;
if (mode[1] == '$')
value = strtoull(oprand, NULL, 16);
if (mode[1] == '%')
value = strtoull(oprand, NULL, 2);
}
if (mode[0] == '$') {
value = strtoull(oprand, NULL, 16);
if (value & 0xFFFFFFFF) {
addrmode = 2;
} else if (value & 0xFFFFFFFF00000000) {
addrmode = 5;
}
}
}
}
if (postfix != NULL && !(done & 6)) {
if (strcasecmp(postfix, "w") == 0) {
addr[address++] = 1;
} else if (strcasecmp(postfix, "d") == 0) {
addr[address++] = 2;
} else if (strcasecmp(postfix, "q") == 0) {
addr[address++] = 3;
} else {
addr[address++] = 0;
}
} else if (postfix == NULL && !(done & 6)) {
addr[address++] = 0;
}
if (ins != NULL && !(done & 6)) {
uint8_t i;
for (i = 0; i < 77; i++) {
if (strcasecmp(opcodes[i].mnemonic, ins) == 0) {
op = opcodes[i];
break;
}
}
uint8_t r = addr[address-1] & 3;
switch (addrmode) {
case 0:
if (op.impl || op.impl == CPS) {
addr[address++] = op.impl;
break;
} else {
fprintf(stderr, "oof, %s requires an operand.\n", op.mnemonic);
}
break;
case 1:
if (op.imm) {
addr[address++] = op.imm;
switch (op.imm) {
case PHP:
case PHA:
case PHY:
case PHX:
case PLP:
case PLA:
case PLY:
case PLX:
case STT:
case LSL:
case LSR:
case ROL:
case ROR:
case ENT:
addr[address++] = value & 0xFF;
break;
default:
addr[address] = value & 0xFF;
if (r & 1)
addr[address+1] = value >> 8;
if (r & 2)
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
if (r & 3)
addr[address+4] = value >> 32;
addr[address+5] = value >> 40;
addr[address+6] = value >> 48;
addr[address+7] = value >> 56;
address+=(1 << (r & 3));
break;
}
break;
} else {
fprintf(stderr, "oof, %s does not use Immediate data.\n", op.mnemonic);
}
break;
case 2:
if (op.zm) {
addr[address++] = op.zm;
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
address+=4;
break;
} else {
fprintf(stderr, "oof, %s does not use Zero Matrix.\n", op.mnemonic);
}
break;
case 3:
if (op.zmx) {
addr[address++] = op.zmy;
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
address+=4;
break;
} else {
fprintf(stderr, "oof, %s does not use Zero Matrix, indexed with x.\n", op.mnemonic);
}
break;
case 4:
if (op.zmy) {
addr[address++] = op.zmy;
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
address+=4;
break;
} else {
fprintf(stderr, "oof, %s does not use Zero Matrix, indexed with y.\n", op.mnemonic);
}
break;
case 5:
if (op.abs) {
addr[address++] = op.abs;
addr[address] = value & 0xFF;
addr[address+1] = value >> 8;
addr[address+2] = value >> 16;
addr[address+3] = value >> 24;
addr[address+4] = value >> 32;
addr[address+5] = value >> 40;
addr[address+6] = value >> 48;
addr[address+7] = value >> 56;
address+=8;
break;
} else {
fprintf(stderr, "oof, %s cannot be an absolute dictator.\n", op.mnemonic);
}
break;
}
if (!(done & 6))
printf("instruction: %s, ", ins);
#if (!__GLIBC__) || (__TINYC__)
printf("Postfix: %s, ", (postfix != NULL) ? postfix : "none");
#else
printf("Postfix: %s, ", (postfix[0] != '\0') ? postfix : "none");
#endif
printf("Operand: %s, Address: $%llx\n", (oprand != NULL) ? oprand : "none", address);
}
}
}
}
return 0;
}
