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-rw-r--r--src/instruction.ts726
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diff --git a/src/instruction.ts b/src/instruction.ts
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@@ -1,726 +0,0 @@
-/**
- * AVR-8 Instruction Simulation
- * Part of AVR8js
- * Reference: http://ww1.microchip.com/downloads/en/devicedoc/atmel-0856-avr-instruction-set-manual.pdf
- *
- * Copyright (C) 2019, Uri Shaked
- */
-
-import { ICPU } from './cpu';
-import { u16 } from './types';
-
-function isTwoWordInstruction(opcode: u16) {
- return (
- /* LDS */
- (opcode & 0xfe0f) === 0x9000 ||
- /* STS */
- (opcode & 0xfe0f) === 0x9200 ||
- /* CALL */
- (opcode & 0xfe0e) === 0x940e ||
- /* JMP */
- (opcode & 0xfe0e) === 0x940c
- );
-}
-
-export function avrInstruction(cpu: ICPU) {
- const opcode = cpu.progMem[cpu.pc];
-
- if ((opcode & 0xfc00) === 0x1c00) {
- /* ADC, 0001 11rd dddd rrrr */
- const d = cpu.data[(opcode & 0x1f0) >> 4];
- const r = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- const sum = d + r + (cpu.data[95] & 1);
- const R = sum & 255;
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= (R ^ r) & (d ^ R) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= sum & 256 ? 1 : 0;
- sreg |= 1 & ((d & r) | (r & ~R) | (~R & d)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0xc00) {
- /* ADD, 0000 11rd dddd rrrr */
- const d = cpu.data[(opcode & 0x1f0) >> 4];
- const r = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- const R = (d + r) & 255;
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= (R ^ r) & (R ^ d) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= (d + r) & 256 ? 1 : 0;
- sreg |= 1 & ((d & r) | (r & ~R) | (~R & d)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xff00) === 0x9600) {
- /* ADIW, 1001 0110 KKdd KKKK */
- const addr = 2 * ((opcode & 0x30) >> 4) + 24;
- const value = cpu.dataView.getUint16(addr, true);
- const R = (value + ((opcode & 0xf) | ((opcode & 0xc0) >> 2))) & 0xffff;
- cpu.dataView.setUint16(addr, R, true);
- let sreg = cpu.data[95] & 0xe0;
- sreg |= R ? 0 : 2;
- sreg |= 0x8000 & R ? 4 : 0;
- sreg |= ~value & R & 0x8000 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= ~R & value & 0x8000 ? 1 : 0;
- cpu.data[95] = sreg;
- cpu.cycles++;
- } else if ((opcode & 0xfc00) === 0x2000) {
- /* AND, 0010 00rd dddd rrrr */
- const R = cpu.data[(opcode & 0x1f0) >> 4] & cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf000) === 0x7000) {
- /* ANDI, 0111 KKKK dddd KKKK */
- const R = cpu.data[((opcode & 0xf0) >> 4) + 16] & ((opcode & 0xf) | ((opcode & 0xf00) >> 4));
- cpu.data[((opcode & 0xf0) >> 4) + 16] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfe0f) === 0x9405) {
- /* ASR, 1001 010d dddd 0101 */
- const value = cpu.data[(opcode & 0x1f0) >> 4];
- const R = (value >>> 1) | (128 & value);
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= value & 1;
- sreg |= ((sreg >> 2) & 1) ^ (sreg & 1) ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xff8f) === 0x9488) {
- /* BCLR, 1001 0100 1sss 1000 */
- cpu.data[95] &= ~(1 << ((opcode & 0x70) >> 4));
- } else if ((opcode & 0xfe08) === 0xf800) {
- /* BLD, 1111 100d dddd 0bbb */
- const b = opcode & 7;
- const d = (opcode & 0x1f0) >> 4;
- cpu.data[d] = (~(1 << b) & cpu.data[d]) | (((cpu.data[95] >> 6) & 1) << b);
- } else if ((opcode & 0xfc00) === 0xf400) {
- /* BRBC, 1111 01kk kkkk ksss */
- if (!(cpu.data[95] & (1 << (opcode & 7)))) {
- cpu.pc = cpu.pc + (((opcode & 0x1f8) >> 3) - (opcode & 0x200 ? 0x40 : 0));
- cpu.cycles++;
- }
- } else if ((opcode & 0xfc00) === 0xf000) {
- /* BRBS, 1111 00kk kkkk ksss */
- if (cpu.data[95] & (1 << (opcode & 7))) {
- cpu.pc = cpu.pc + (((opcode & 0x1f8) >> 3) - (opcode & 0x200 ? 0x40 : 0));
- cpu.cycles++;
- }
- } else if ((opcode & 0xff8f) === 0x9408) {
- /* BSET, 1001 0100 0sss 1000 */
- cpu.data[95] |= 1 << ((opcode & 0x70) >> 4);
- } else if ((opcode & 0xfe08) === 0xfa00) {
- /* BST, 1111 101d dddd 0bbb */
- const d = cpu.data[(opcode & 0x1f0) >> 4];
- const b = opcode & 7;
- cpu.data[95] = (cpu.data[95] & 0xbf) | ((d >> b) & 1 ? 0x40 : 0);
- } else if ((opcode & 0xfe0e) === 0x940e) {
- /* CALL, 1001 010k kkkk 111k kkkk kkkk kkkk kkkk */
- const k = cpu.progMem[cpu.pc + 1] | ((opcode & 1) << 16) | ((opcode & 0x1f0) << 13);
- const ret = cpu.pc + 2;
- const sp = cpu.dataView.getUint16(93, true);
- cpu.data[sp] = 255 & ret;
- cpu.data[sp - 1] = (ret >> 8) & 255;
- cpu.dataView.setUint16(93, sp - 2, true);
- cpu.pc = k - 1;
- cpu.cycles += 4;
- } else if ((opcode & 0xff00) === 0x9800) {
- /* CBI, 1001 1000 AAAA Abbb */
- const A = opcode & 0xf8;
- const b = opcode & 7;
- const R = cpu.readData((A >> 3) + 32);
- cpu.writeData((A >> 3) + 32, R & ~(1 << b));
- } else if ((opcode & 0xfe0f) === 0x9400) {
- /* COM, 1001 010d dddd 0000 */
- const d = (opcode & 0x1f0) >> 4;
- const R = 255 - cpu.data[d];
- cpu.data[d] = R;
- let sreg = (cpu.data[95] & 0xe1) | 1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x1400) {
- /* CP, 0001 01rd dddd rrrr */
- const val1 = cpu.data[(opcode & 0x1f0) >> 4];
- const val2 = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- const R = val1 - val2;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= 0 !== ((val1 ^ val2) & (val1 ^ R) & 128) ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= val2 > val1 ? 1 : 0;
- sreg |= 1 & ((~val1 & val2) | (val2 & R) | (R & ~val1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x400) {
- /* CPC, 0000 01rd dddd rrrr */
- const arg1 = cpu.data[(opcode & 0x1f0) >> 4];
- const arg2 = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- let sreg = cpu.data[95];
- const r = arg1 - arg2 - (sreg & 1);
- sreg = (sreg & 0xc0) | (!r && (sreg >> 1) & 1 ? 2 : 0) | (arg2 + (sreg & 1) > arg1 ? 1 : 0);
- sreg |= 128 & r ? 4 : 0;
- sreg |= (arg1 ^ arg2) & (arg1 ^ r) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= 1 & ((~arg1 & arg2) | (arg2 & r) | (r & ~arg1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf000) === 0x3000) {
- /* CPI, 0011 KKKK dddd KKKK */
- const arg1 = cpu.data[((opcode & 0xf0) >> 4) + 16];
- const arg2 = (opcode & 0xf) | ((opcode & 0xf00) >> 4);
- const r = arg1 - arg2;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= r ? 0 : 2;
- sreg |= 128 & r ? 4 : 0;
- sreg |= (arg1 ^ arg2) & (arg1 ^ r) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= arg2 > arg1 ? 1 : 0;
- sreg |= 1 & ((~arg1 & arg2) | (arg2 & r) | (r & ~arg1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x1000) {
- /* CPSE, 0001 00rd dddd rrrr */
- if (cpu.data[(opcode & 0x1f0) >> 4] === cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)]) {
- const nextOpcode = cpu.progMem[cpu.pc + 1];
- const skipSize = isTwoWordInstruction(nextOpcode) ? 2 : 1;
- cpu.pc += skipSize;
- cpu.cycles += skipSize;
- }
- } else if ((opcode & 0xfe0f) === 0x940a) {
- /* DEC, 1001 010d dddd 1010 */
- const value = cpu.data[(opcode & 0x1f0) >> 4];
- const R = value - 1;
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= 128 === value ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x2400) {
- /* EOR, 0010 01rd dddd rrrr */
- const R = cpu.data[(opcode & 0x1f0) >> 4] ^ cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xff88) === 0x308) {
- /* FMUL, 0000 0011 0ddd 1rrr */
- const v1 = cpu.data[((opcode & 0x70) >> 4) + 16];
- const v2 = cpu.data[(opcode & 7) + 16];
- const R = (v1 * v2) << 1;
- cpu.dataView.setUint16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 0 : 2) | ((v1 * v2) & 0x8000 ? 1 : 0);
- cpu.cycles++;
- } else if ((opcode & 0xff88) === 0x380) {
- /* FMULS, 0000 0011 1ddd 0rrr */
- const v1 = cpu.dataView.getInt8(((opcode & 0x70) >> 4) + 16);
- const v2 = cpu.dataView.getInt8((opcode & 7) + 16);
- const R = (v1 * v2) << 1;
- cpu.dataView.setInt16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 0 : 2) | ((v1 * v2) & 0x8000 ? 1 : 0);
- cpu.cycles++;
- } else if ((opcode & 0xff88) === 0x388) {
- /* FMULSU, 0000 0011 1ddd 1rrr */
- const v1 = cpu.dataView.getInt8(((opcode & 0x70) >> 4) + 16);
- const v2 = cpu.data[(opcode & 7) + 16];
- const R = (v1 * v2) << 1;
- cpu.dataView.setInt16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 2 : 0) | ((v1 * v2) & 0x8000 ? 1 : 0);
- cpu.cycles++;
- } else if (opcode === 0x9509) {
- /* ICALL, 1001 0101 0000 1001 */
- const retAddr = cpu.pc + 1;
- const sp = cpu.dataView.getUint16(93, true);
- cpu.data[sp] = retAddr & 255;
- cpu.data[sp - 1] = (retAddr >> 8) & 255;
- cpu.dataView.setUint16(93, sp - 2, true);
- cpu.pc = cpu.dataView.getUint16(30, true) - 1;
- cpu.cycles += 2;
- } else if (opcode === 0x9409) {
- /* IJMP, 1001 0100 0000 1001 */
- cpu.pc = cpu.dataView.getUint16(30, true) - 1;
- cpu.cycles++;
- } else if ((opcode & 0xf800) === 0xb000) {
- /* IN, 1011 0AAd dddd AAAA */
- const i = cpu.readData(((opcode & 0xf) | ((opcode & 0x600) >> 5)) + 32);
- cpu.data[(opcode & 0x1f0) >> 4] = i;
- } else if ((opcode & 0xfe0f) === 0x9403) {
- /* INC, 1001 010d dddd 0011 */
- const d = cpu.data[(opcode & 0x1f0) >> 4];
- const r = (d + 1) & 255;
- cpu.data[(opcode & 0x1f0) >> 4] = r;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= r ? 0 : 2;
- sreg |= 128 & r ? 4 : 0;
- sreg |= 127 === d ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfe0e) === 0x940c) {
- /* JMP, 1001 010k kkkk 110k kkkk kkkk kkkk kkkk */
- cpu.pc = (cpu.progMem[cpu.pc + 1] | ((opcode & 1) << 16) | ((opcode & 0x1f0) << 13)) - 1;
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x9206) {
- /* LAC, 1001 001r rrrr 0110 */
- const r = (opcode & 0x1f0) >> 4;
- const clear = cpu.data[r];
- const value = cpu.readData(cpu.dataView.getUint16(30, true));
- cpu.writeData(cpu.dataView.getUint16(30, true), value & (255 - clear));
- cpu.data[r] = value;
- } else if ((opcode & 0xfe0f) === 0x9205) {
- /* LAS, 1001 001r rrrr 0101 */
- const r = (opcode & 0x1f0) >> 4;
- const set = cpu.data[r];
- const value = cpu.readData(cpu.dataView.getUint16(30, true));
- cpu.writeData(cpu.dataView.getUint16(30, true), value | set);
- cpu.data[r] = value;
- } else if ((opcode & 0xfe0f) === 0x9207) {
- /* LAT, 1001 001r rrrr 0111 */
- const r = cpu.data[(opcode & 0x1f0) >> 4];
- const R = cpu.readData(cpu.dataView.getUint16(30, true));
- cpu.writeData(cpu.dataView.getUint16(30, true), r ^ R);
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- } else if ((opcode & 0xf000) === 0xe000) {
- /* LDI, 1110 KKKK dddd KKKK */
- cpu.data[((opcode & 0xf0) >> 4) + 16] = (opcode & 0xf) | ((opcode & 0xf00) >> 4);
- } else if ((opcode & 0xfe0f) === 0x9000) {
- /* LDS, 1001 000d dddd 0000 kkkk kkkk kkkk kkkk */
- const value = cpu.readData(cpu.progMem[cpu.pc + 1]);
- cpu.data[(opcode & 0x1f0) >> 4] = value;
- cpu.pc++;
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x900c) {
- /* LDX, 1001 000d dddd 1100 */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(cpu.dataView.getUint16(26, true));
- } else if ((opcode & 0xfe0f) === 0x900d) {
- /* LDX(INC), 1001 000d dddd 1101 */
- const x = cpu.dataView.getUint16(26, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(x);
- cpu.dataView.setUint16(26, x + 1, true);
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x900e) {
- /* LDX(DEC), 1001 000d dddd 1110 */
- const x = cpu.dataView.getUint16(26, true) - 1;
- cpu.dataView.setUint16(26, x, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(x);
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x8008) {
- /* LDY, 1000 000d dddd 1000 */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(cpu.dataView.getUint16(28, true));
- } else if ((opcode & 0xfe0f) === 0x9009) {
- /* LDY(INC), 1001 000d dddd 1001 */
- const y = cpu.dataView.getUint16(28, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(y);
- cpu.dataView.setUint16(28, y + 1, true);
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x900a) {
- /* LDY(DEC), 1001 000d dddd 1010 */
- const y = cpu.dataView.getUint16(28, true) - 1;
- cpu.dataView.setUint16(28, y, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(y);
- cpu.cycles += 2;
- } else if (
- (opcode & 0xd208) === 0x8008 &&
- (opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)
- ) {
- /* LDDY, 10q0 qq0d dddd 1qqq */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(
- cpu.dataView.getUint16(28, true) +
- ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8))
- );
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x8000) {
- /* LDZ, 1000 000d dddd 0000 */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(cpu.dataView.getUint16(30, true));
- } else if ((opcode & 0xfe0f) === 0x9001) {
- /* LDZ(INC), 1001 000d dddd 0001 */
- const z = cpu.dataView.getUint16(30, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(z);
- cpu.dataView.setUint16(30, z + 1, true);
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x9002) {
- /* LDZ(DEC), 1001 000d dddd 0010 */
- const z = cpu.dataView.getUint16(30, true) - 1;
- cpu.dataView.setUint16(30, z, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(z);
- cpu.cycles += 2;
- } else if (
- (opcode & 0xd208) === 0x8000 &&
- (opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)
- ) {
- /* LDDZ, 10q0 qq0d dddd 0qqq */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.readData(
- cpu.dataView.getUint16(30, true) +
- ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8))
- );
- cpu.cycles += 2;
- } else if (opcode === 0x95c8) {
- /* LPM, 1001 0101 1100 1000 */
- cpu.data[0] = cpu.progBytes[cpu.dataView.getUint16(30, true)];
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x9004) {
- /* LPM(REG), 1001 000d dddd 0100 */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.progBytes[cpu.dataView.getUint16(30, true)];
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x9005) {
- /* LPM(INC), 1001 000d dddd 0101 */
- const i = cpu.dataView.getUint16(30, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.progBytes[i];
- cpu.dataView.setUint16(30, i + 1, true);
- cpu.cycles += 2;
- } else if ((opcode & 0xfe0f) === 0x9406) {
- /* LSR, 1001 010d dddd 0110 */
- const value = cpu.data[(opcode & 0x1f0) >> 4];
- const R = value >>> 1;
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe0;
- sreg |= R ? 0 : 2;
- sreg |= value & 1;
- sreg |= ((sreg >> 2) & 1) ^ (sreg & 1) ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x2c00) {
- /* MOV, 0010 11rd dddd rrrr */
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- } else if ((opcode & 0xff00) === 0x100) {
- /* MOVW, 0000 0001 dddd rrrr */
- const r2 = 2 * (opcode & 0xf);
- const d2 = 2 * ((opcode & 0xf0) >> 4);
- cpu.data[d2] = cpu.data[r2];
- cpu.data[d2 + 1] = cpu.data[r2 + 1];
- } else if ((opcode & 0xfc00) === 0x9c00) {
- /* MUL, 1001 11rd dddd rrrr */
- const R = cpu.data[(opcode & 0x1f0) >> 4] * cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- cpu.dataView.setUint16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 0 : 2) | (0x8000 & R ? 1 : 0);
- cpu.cycles++;
- } else if ((opcode & 0xff00) === 0x200) {
- /* MULS, 0000 0010 dddd rrrr */
- const R =
- cpu.dataView.getInt8(((opcode & 0xf0) >> 4) + 16) * cpu.dataView.getInt8((opcode & 0xf) + 16);
- cpu.dataView.setInt16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 0 : 2) | (0x8000 & R ? 1 : 0);
- cpu.cycles++;
- } else if ((opcode & 0xff88) === 0x300) {
- /* MULSU, 0000 0011 0ddd 0rrr */
- const R = cpu.dataView.getInt8(((opcode & 0x70) >> 4) + 16) * cpu.data[(opcode & 7) + 16];
- cpu.dataView.setInt16(0, R, true);
- cpu.data[95] = (cpu.data[95] & 0xfc) | (0xffff & R ? 0 : 2) | (0x8000 & R ? 1 : 0);
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x9401) {
- /* NEG, 1001 010d dddd 0001 */
- const d = (opcode & 0x1f0) >> 4;
- const value = cpu.data[d];
- const R = 0 - value;
- cpu.data[d] = R;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= 128 === R ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= R ? 1 : 0;
- sreg |= 1 & (R | value) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if (opcode === 0) {
- /* NOP, 0000 0000 0000 0000 */
- /* NOP */
- } else if ((opcode & 0xfc00) === 0x2800) {
- /* OR, 0010 10rd dddd rrrr */
- const R = cpu.data[(opcode & 0x1f0) >> 4] | cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf000) === 0x6000) {
- /* SBR, 0110 KKKK dddd KKKK */
- const R = cpu.data[((opcode & 0xf0) >> 4) + 16] | ((opcode & 0xf) | ((opcode & 0xf00) >> 4));
- cpu.data[((opcode & 0xf0) >> 4) + 16] = R;
- let sreg = cpu.data[95] & 0xe1;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf800) === 0xb800) {
- /* OUT, 1011 1AAr rrrr AAAA */
- cpu.writeData(((opcode & 0xf) | ((opcode & 0x600) >> 5)) + 32, cpu.data[(opcode & 0x1f0) >> 4]);
- } else if ((opcode & 0xfe0f) === 0x900f) {
- /* POP, 1001 000d dddd 1111 */
- const value = cpu.dataView.getUint16(93, true) + 1;
- cpu.dataView.setUint16(93, value, true);
- cpu.data[(opcode & 0x1f0) >> 4] = cpu.data[value];
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x920f) {
- /* PUSH, 1001 001d dddd 1111 */
- const value = cpu.dataView.getUint16(93, true);
- cpu.data[value] = cpu.data[(opcode & 0x1f0) >> 4];
- cpu.dataView.setUint16(93, value - 1, true);
- cpu.cycles++;
- } else if ((opcode & 0xf000) === 0xd000) {
- /* RCALL, 1101 kkkk kkkk kkkk */
- const k = (opcode & 0x7ff) - (opcode & 0x800 ? 0x800 : 0);
- const retAddr = cpu.pc + 1;
- const sp = cpu.dataView.getUint16(93, true);
- cpu.data[sp] = 255 & retAddr;
- cpu.data[sp - 1] = (retAddr >> 8) & 255;
- cpu.dataView.setUint16(93, sp - 2, true);
- cpu.pc += k;
- cpu.cycles += 3;
- } else if (opcode === 0x9508) {
- /* RET, 1001 0101 0000 1000 */
- const i = cpu.dataView.getUint16(93, true) + 2;
- cpu.dataView.setUint16(93, i, true);
- cpu.pc = (cpu.data[i - 1] << 8) + cpu.data[i] - 1;
- cpu.cycles += 4;
- } else if (opcode === 0x9518) {
- /* RETI, 1001 0101 0001 1000 */
- const i = cpu.dataView.getUint16(93, true) + 2;
- cpu.dataView.setUint16(93, i, true);
- cpu.pc = (cpu.data[i - 1] << 8) + cpu.data[i] - 1;
- cpu.cycles += 4;
- cpu.data[95] |= 0x80; // Enable interrupts
- } else if ((opcode & 0xf000) === 0xc000) {
- /* RJMP, 1100 kkkk kkkk kkkk */
- cpu.pc = cpu.pc + ((opcode & 0x7ff) - (opcode & 0x800 ? 0x800 : 0));
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x9407) {
- /* ROR, 1001 010d dddd 0111 */
- const d = cpu.data[(opcode & 0x1f0) >> 4];
- const r = (d >>> 1) | ((cpu.data[95] & 1) << 7);
- cpu.data[(opcode & 0x1f0) >> 4] = r;
- let sreg = cpu.data[95] & 0xe0;
- sreg |= r ? 0 : 2;
- sreg |= 128 & r ? 4 : 0;
- sreg |= 1 & d ? 1 : 0;
- sreg |= ((sreg >> 2) & 1) ^ (sreg & 1) ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfc00) === 0x800) {
- /* SBC, 0000 10rd dddd rrrr */
- const val1 = cpu.data[(opcode & 0x1f0) >> 4];
- const val2 = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- let sreg = cpu.data[95];
- const R = val1 - val2 - (sreg & 1);
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- sreg = (sreg & 0xc0) | (!R && (sreg >> 1) & 1 ? 2 : 0) | (val2 + (sreg & 1) > val1 ? 1 : 0);
- sreg |= 128 & R ? 4 : 0;
- sreg |= (val1 ^ val2) & (val1 ^ R) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= 1 & ((~val1 & val2) | (val2 & R) | (R & ~val1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf000) === 0x4000) {
- /* SBCI, 0100 KKKK dddd KKKK */
- const val1 = cpu.data[((opcode & 0xf0) >> 4) + 16];
- const val2 = (opcode & 0xf) | ((opcode & 0xf00) >> 4);
- let sreg = cpu.data[95];
- const R = val1 - val2 - (sreg & 1);
- cpu.data[((opcode & 0xf0) >> 4) + 16] = R;
- sreg = (sreg & 0xc0) | (!R && (sreg >> 1) & 1 ? 2 : 0) | (val2 + (sreg & 1) > val1 ? 1 : 0);
- sreg |= 128 & R ? 4 : 0;
- sreg |= (val1 ^ val2) & (val1 ^ R) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= 1 & ((~val1 & val2) | (val2 & R) | (R & ~val1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xff00) === 0x9a00) {
- /* SBI, 1001 1010 AAAA Abbb */
- const target = ((opcode & 0xf8) >> 3) + 32;
- cpu.writeData(target, cpu.readData(target) | (1 << (opcode & 7)));
- cpu.cycles++;
- } else if ((opcode & 0xff00) === 0x9900) {
- /* SBIC, 1001 1001 AAAA Abbb */
- const value = cpu.readData(((opcode & 0xf8) >> 3) + 32);
- if (!(value & (1 << (opcode & 7)))) {
- const nextOpcode = cpu.progMem[cpu.pc + 1];
- const skipSize = isTwoWordInstruction(nextOpcode) ? 2 : 1;
- cpu.cycles += skipSize;
- cpu.pc += skipSize;
- }
- } else if ((opcode & 0xff00) === 0x9b00) {
- /* SBIS, 1001 1011 AAAA Abbb */
- const value = cpu.readData(((opcode & 0xf8) >> 3) + 32);
- if (value & (1 << (opcode & 7))) {
- const nextOpcode = cpu.progMem[cpu.pc + 1];
- const skipSize = isTwoWordInstruction(nextOpcode) ? 2 : 1;
- cpu.cycles += skipSize;
- cpu.pc += skipSize;
- }
- } else if ((opcode & 0xff00) === 0x9700) {
- /* SBIW, 1001 0111 KKdd KKKK */
- const i = 2 * ((opcode & 0x30) >> 4) + 24;
- const a = cpu.dataView.getUint16(i, true);
- const l = (opcode & 0xf) | ((opcode & 0xc0) >> 2);
- const R = a - l;
- cpu.dataView.setUint16(i, R, true);
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 0x8000 & R ? 4 : 0;
- sreg |= a & ~R & 0x8000 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= l > a ? 1 : 0;
- sreg |= 1 & ((~a & l) | (l & R) | (R & ~a)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- cpu.cycles++;
- } else if ((opcode & 0xfe08) === 0xfc00) {
- /* SBRC, 1111 110r rrrr 0bbb */
- if (!(cpu.data[(opcode & 0x1f0) >> 4] & (1 << (opcode & 7)))) {
- const nextOpcode = cpu.progMem[cpu.pc + 1];
- const skipSize = isTwoWordInstruction(nextOpcode) ? 2 : 1;
- cpu.cycles += skipSize;
- cpu.pc += skipSize;
- }
- } else if ((opcode & 0xfe08) === 0xfe00) {
- /* SBRS, 1111 111r rrrr 0bbb */
- if (cpu.data[(opcode & 0x1f0) >> 4] & (1 << (opcode & 7))) {
- const nextOpcode = cpu.progMem[cpu.pc + 1];
- const skipSize = isTwoWordInstruction(nextOpcode) ? 2 : 1;
- cpu.cycles += skipSize;
- cpu.pc += skipSize;
- }
- } else if (opcode === 0x9588) {
- /* SLEEP, 1001 0101 1000 1000 */
- /* not implemented */
- } else if (opcode === 0x95e8) {
- /* SPM, 1001 0101 1110 1000 */
- /* not implemented */
- } else if (opcode === 0x95f8) {
- /* SPM(INC), 1001 0101 1111 1000 */
- /* not implemented */
- } else if ((opcode & 0xfe0f) === 0x9200) {
- /* STS, 1001 001d dddd 0000 kkkk kkkk kkkk kkkk */
- const value = cpu.data[(opcode & 0x1f0) >> 4];
- const addr = cpu.progMem[cpu.pc + 1];
- cpu.writeData(addr, value);
- cpu.pc++;
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x920c) {
- /* STX, 1001 001r rrrr 1100 */
- cpu.writeData(cpu.dataView.getUint16(26, true), cpu.data[(opcode & 0x1f0) >> 4]);
- } else if ((opcode & 0xfe0f) === 0x920d) {
- /* STX(INC), 1001 001r rrrr 1101 */
- const x = cpu.dataView.getUint16(26, true);
- cpu.writeData(x, cpu.data[(opcode & 0x1f0) >> 4]);
- cpu.dataView.setUint16(26, x + 1, true);
- } else if ((opcode & 0xfe0f) === 0x920e) {
- /* STX(DEC), 1001 001r rrrr 1110 */
- const i = cpu.data[(opcode & 0x1f0) >> 4];
- const x = cpu.dataView.getUint16(26, true) - 1;
- cpu.dataView.setUint16(26, x, true);
- cpu.writeData(x, i);
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x8208) {
- /* STY, 1000 001r rrrr 1000 */
- cpu.writeData(cpu.dataView.getUint16(28, true), cpu.data[(opcode & 0x1f0) >> 4]);
- } else if ((opcode & 0xfe0f) === 0x9209) {
- /* STY(INC), 1001 001r rrrr 1001 */
- const i = cpu.data[(opcode & 0x1f0) >> 4];
- const y = cpu.dataView.getUint16(28, true);
- cpu.writeData(y, i);
- cpu.dataView.setUint16(28, y + 1, true);
- } else if ((opcode & 0xfe0f) === 0x920a) {
- /* STY(DEC), 1001 001r rrrr 1010 */
- const i = cpu.data[(opcode & 0x1f0) >> 4];
- const y = cpu.dataView.getUint16(28, true) - 1;
- cpu.dataView.setUint16(28, y, true);
- cpu.writeData(y, i);
- cpu.cycles++;
- } else if (
- (opcode & 0xd208) === 0x8208 &&
- (opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)
- ) {
- /* STDY, 10q0 qq1r rrrr 1qqq */
- cpu.writeData(
- cpu.dataView.getUint16(28, true) +
- ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)),
- cpu.data[(opcode & 0x1f0) >> 4]
- );
- cpu.cycles++;
- } else if ((opcode & 0xfe0f) === 0x8200) {
- /* STZ, 1000 001r rrrr 0000 */
- cpu.writeData(cpu.dataView.getUint16(30, true), cpu.data[(opcode & 0x1f0) >> 4]);
- } else if ((opcode & 0xfe0f) === 0x9201) {
- /* STZ(INC), 1001 001r rrrr 0001 */
- const z = cpu.dataView.getUint16(30, true);
- cpu.writeData(z, cpu.data[(opcode & 0x1f0) >> 4]);
- cpu.dataView.setUint16(30, z + 1, true);
- } else if ((opcode & 0xfe0f) === 0x9202) {
- /* STZ(DEC), 1001 001r rrrr 0010 */
- const i = cpu.data[(opcode & 0x1f0) >> 4];
- const z = cpu.dataView.getUint16(30, true) - 1;
- cpu.dataView.setUint16(30, z, true);
- cpu.writeData(z, i);
- cpu.cycles++;
- } else if (
- (opcode & 0xd208) === 0x8200 &&
- (opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)
- ) {
- /* STDZ, 10q0 qq1r rrrr 0qqq */
- cpu.writeData(
- cpu.dataView.getUint16(30, true) +
- ((opcode & 7) | ((opcode & 0xc00) >> 7) | ((opcode & 0x2000) >> 8)),
- cpu.data[(opcode & 0x1f0) >> 4]
- );
- cpu.cycles++;
- } else if ((opcode & 0xfc00) === 0x1800) {
- /* SUB, 0001 10rd dddd rrrr */
- const val1 = cpu.data[(opcode & 0x1f0) >> 4];
- const val2 = cpu.data[(opcode & 0xf) | ((opcode & 0x200) >> 5)];
- const R = val1 - val2;
-
- cpu.data[(opcode & 0x1f0) >> 4] = R;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= (val1 ^ val2) & (val1 ^ R) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= val2 > val1 ? 1 : 0;
- sreg |= 1 & ((~val1 & val2) | (val2 & R) | (R & ~val1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xf000) === 0x5000) {
- /* SUBI, 0101 KKKK dddd KKKK */
- const val1 = cpu.data[((opcode & 0xf0) >> 4) + 16];
- const val2 = (opcode & 0xf) | ((opcode & 0xf00) >> 4);
- const R = val1 - val2;
- cpu.data[((opcode & 0xf0) >> 4) + 16] = R;
- let sreg = cpu.data[95] & 0xc0;
- sreg |= R ? 0 : 2;
- sreg |= 128 & R ? 4 : 0;
- sreg |= (val1 ^ val2) & (val1 ^ R) & 128 ? 8 : 0;
- sreg |= ((sreg >> 2) & 1) ^ ((sreg >> 3) & 1) ? 0x10 : 0;
- sreg |= val2 > val1 ? 1 : 0;
- sreg |= 1 & ((~val1 & val2) | (val2 & R) | (R & ~val1)) ? 0x20 : 0;
- cpu.data[95] = sreg;
- } else if ((opcode & 0xfe0f) === 0x9402) {
- /* SWAP, 1001 010d dddd 0010 */
- const d = (opcode & 0x1f0) >> 4;
- const i = cpu.data[d];
- cpu.data[d] = ((15 & i) << 4) | ((240 & i) >>> 4);
- } else if (opcode === 0x95a8) {
- /* WDR, 1001 0101 1010 1000 */
- /* not implemented */
- } else if ((opcode & 0xfe0f) === 0x9204) {
- /* XCH, 1001 001r rrrr 0100 */
- const r = (opcode & 0x1f0) >> 4;
- const val1 = cpu.data[r];
- const val2 = cpu.data[cpu.dataView.getUint16(30, true)];
- cpu.data[cpu.dataView.getUint16(30, true)] = val1;
- cpu.data[r] = val2;
- }
-
- cpu.pc = (cpu.pc + 1) % cpu.progMem.length;
- cpu.cycles++;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2026-03-31 23:09:41 +0000