Implementing disassembler interface
This commit is contained in:
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76c95b0523
commit
f8f4005e02
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@ -27,13 +27,13 @@ static const int8_t LOOKUP_OPCODE[] = {
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VUE_SHL_REG, 1, VUE_SHR_REG, 1, VUE_JMP , 1, VUE_SAR_REG, 1,
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VUE_MUL , 1, VUE_DIV , 1, VUE_MULU , 1, VUE_DIVU , 1,
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VUE_OR , 1, VUE_AND , 1, VUE_XOR , 1, VUE_NOT , 1,
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-VUE_MOV_IMM, 2,-VUE_ADD_IMM, 2, VUE_SETF , 2,-VUE_CMP_IMM, 2,
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VUE_MOV_IMM,-2, VUE_ADD_IMM,-2, VUE_SETF , 2, VUE_CMP_IMM,-2,
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VUE_SHL_IMM, 2, VUE_SHR_IMM, 2, VUE_CLI , 2, VUE_SAR_IMM, 2,
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VUE_TRAP , 2, VUE_RETI , 2, VUE_HALT , 2, VUE_ILLEGAL, 0,
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VUE_LDSR , 2, VUE_STSR , 2, VUE_SEI , 2, BITSTRING , 2,
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VUE_BCOND , 3, VUE_BCOND , 3, VUE_BCOND , 3, VUE_BCOND , 3,
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VUE_BCOND , 3, VUE_BCOND , 3, VUE_BCOND , 3, VUE_BCOND , 3,
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-VUE_MOVEA , 5,-VUE_ADDI , 5, VUE_JR , 4, VUE_JAL , 4,
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VUE_MOVEA ,-5, VUE_ADDI ,-5, VUE_JR , 4, VUE_JAL , 4,
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VUE_ORI , 5, VUE_ANDI , 5, VUE_XORI , 5, VUE_MOVHI , 5,
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VUE_LD_B , 6, VUE_LD_H , 6, VUE_ILLEGAL, 0, VUE_LD_W , 6,
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VUE_ST_B , 6, VUE_ST_H , 6, VUE_ILLEGAL, 0, VUE_ST_W , 6,
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@ -71,10 +71,10 @@ static void cpuDecode(VUE_INST *inst, int32_t bits) {
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/* Configure instance fields */
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inst->bits = bits;
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inst->opcode = bits >> 26 & 63;
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x = inst->opcode << 1 | 1;
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extend = LOOKUP_OPCODE[x];
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inst->format = LOOKUP_OPCODE[x + 1];
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inst->id = extend < 0 ? -extend : extend;
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x = inst->opcode << 1;
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inst->id = LOOKUP_OPCODE[x ];
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extend = LOOKUP_OPCODE[x + 1];
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inst->format = extend < 0 ? -extend : extend;
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inst->size = inst->format < 4 ? 2 : 4;
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/* Decode by format */
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@ -13,15 +13,13 @@ import vue.*;
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// CPU window
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class CPUWindow extends ChildWindow {
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// Instance fields
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private int expandWidth; // Width of expand buttons
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private boolean shown; // Window has been shown
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private int systemHeight; // Initial height of system register list
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// Package fields
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MainWindow parent; // Containing window
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// UI components
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private JPanel dasm; // Disassembler
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private RegisterList lstProgram; // Program register list
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private RegisterList lstSystem; // System register list
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private DisassemblerPane panDasm; // Disassembler client
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private RegisterList lstProgram; // Program register list
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private RegisterList lstSystem; // System register list
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@ -29,6 +27,8 @@ class CPUWindow extends ChildWindow {
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// Global Settings //
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///////////////////////////////////////////////////////////////////////////
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static Font dasmFont; // Disassembler font
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static int dasmFontHeight; // Disassembler font line height
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static int regExpandWidth; // Width of register list expand button
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static Font regHexFont; // Register list hex font
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static Dimension regHexFontSize; // Max dimensions
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@ -64,7 +64,19 @@ class CPUWindow extends ChildWindow {
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regExpandWidth = label.getPreferredSize().width;
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label.setText("-");
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regExpandWidth = Math.max(regExpandWidth,
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label.getPreferredSize().width);
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label.getPreferredSize().width) + 4;
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// Disassembler font
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setDasmFont(new Font(Util.fontFamily(new String[]
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{ "Consolas", Font.MONOSPACED } ), Font.PLAIN, 14));
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}
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// Specify a font to use as the disassembler font
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static void setDasmFont(Font font) {
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dasmFont = font;
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var label = new JLabel("!");
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label.setFont(font);
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dasmFontHeight = label.getPreferredSize().height;
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}
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// Specify a font to use as the register list hex font
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@ -84,25 +96,25 @@ class CPUWindow extends ChildWindow {
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super(parent, "cpu.title");
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instances.add(this);
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var client = getContentPane();
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// Configure instance fields
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this.parent = parent;
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dasm = new JPanel(null);
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dasm.setBackground(SystemColor.window);
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dasm.setFocusable(true);
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lstSystem = new RegisterList(this, true);
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// Configure child panes
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panDasm = new DisassemblerPane(this);
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lstSystem = new RegisterList(this, true);
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lstProgram = new RegisterList(this, false);
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// Configure layout
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var inner = Util.splitPane(JSplitPane.VERTICAL_SPLIT);
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inner.setTopComponent(lstSystem);
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inner.setBottomComponent(lstProgram);
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var outer = Util.splitPane(JSplitPane.HORIZONTAL_SPLIT);
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outer.setLeftComponent(new JScrollPane(dasm,
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JScrollPane.VERTICAL_SCROLLBAR_NEVER,
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JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED));
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outer.setLeftComponent(panDasm);
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outer.setRightComponent(inner);
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outer.setResizeWeight(1);
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// Configure component
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var client = getContentPane();
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client.add(outer);
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client.setPreferredSize(new Dimension(480, 300));
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configure();
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@ -128,13 +140,15 @@ class CPUWindow extends ChildWindow {
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// Apply configuration settings
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void configure() {
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panDasm .configure();
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lstProgram.configure();
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lstSystem .configure();
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}
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// Update the display
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void refresh() {
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lstSystem.refresh();
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panDasm .refresh();
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lstSystem .refresh();
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lstProgram.refresh();
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}
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@ -172,7 +172,7 @@ class Disassembler {
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row.mnemonic = "SETF" + CONDITIONS[inst.imm];
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// All other mnemonics
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else row.mnemonic = MNEMONICS[inst.id];
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else row.mnemonic = MNEMONICS[inst.id + 1];
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// Adjust mnemonic case
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if (!mnemonicCaps)
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@ -200,7 +200,7 @@ class Disassembler {
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// Format the destination of a branch or jump
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private static String destination(Instruction inst, int address) {
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return !dispDest ? toHex(inst.disp, 1, immNumber) :
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return !dispDest ? toHex(inst.disp, 1, false) :
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String.format("%08" + (hexCaps ? "X" : "x"), address + inst.disp);
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}
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@ -272,6 +272,13 @@ class Disassembler {
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break;
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}
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// LDSR
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if (inst.id == VUE.LDSR) {
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String temp = imm;
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imm = reg2;
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reg2 = temp;
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}
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// Generic
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return String.format("%s, %s",
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destLast ? imm : reg2,
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@ -328,10 +335,10 @@ class Disassembler {
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"[%s %s %s]",
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src,
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inst.disp < 0 ? "-" : "+",
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toHex(Math.abs(inst.disp), 1, immNumber)
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toHex(Math.abs(inst.disp), 1, false)
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) : String.format(
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"%s[%s]",
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toHex(inst.disp, 1, immNumber),
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toHex(inst.disp, 1, false),
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src
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)
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;
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@ -0,0 +1,373 @@
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package app;
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// Java imports
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import java.awt.*;
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import java.awt.event.*;
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import java.util.*;
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import javax.swing.*;
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// Project imports
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import util.*;
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import vue.*;
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// Disassembler UI
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class DisassemblerPane extends JScrollPane {
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// Instance fields
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private int address; // Address of top row of output
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private CPUWindow parent; // Containing CPU window
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private boolean showBytes; // Display the bytes column
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private boolean shown; // Component has been shown
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private int[] widths; // Column widths
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// UI components
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private JPanel client; // Client area
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private ArrayList<Row> rows; // Disassembler output
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///////////////////////////////////////////////////////////////////////////
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// Classes //
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///////////////////////////////////////////////////////////////////////////
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// One row of disassembler output
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private class Row extends Disassembler.Row {
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Instruction inst; // Decoded instruction
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JLabel[] labels; // Display text
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}
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///////////////////////////////////////////////////////////////////////////
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// Constructors //
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///////////////////////////////////////////////////////////////////////////
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// Default constructor
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DisassemblerPane(CPUWindow parent) {
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super(VERTICAL_SCROLLBAR_NEVER, HORIZONTAL_SCROLLBAR_AS_NEEDED);
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// Configure instance fields
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this.parent = parent;
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rows = new ArrayList<Row>();
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showBytes = true;
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widths = new int[5];
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// Configure client area
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client = new JPanel(null) {
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public void paintComponent(Graphics g) {
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super.paintComponent(g);
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onPaint((Graphics2D) g, getWidth(), getHeight());
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}
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};
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client.addFocusListener(
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Util.onFocus(e->client.repaint(), e->client.repaint()));
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client.addKeyListener(Util.onKey(e->onKeyDown(e), null));
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client.addMouseListener(Util.onMouse(e->client.requestFocus(), null));
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client.setBackground(SystemColor.window);
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client.setFocusable(true);
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// Configure component
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setViewportView(client);
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configure();
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}
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///////////////////////////////////////////////////////////////////////////
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// Package Methods //
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///////////////////////////////////////////////////////////////////////////
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// Apply configuration settings
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void configure() {
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client.repaint();
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}
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// Update the display
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void refresh() {
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client.repaint();
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}
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///////////////////////////////////////////////////////////////////////////
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// Event Handlers //
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///////////////////////////////////////////////////////////////////////////
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// Key down
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private void onKeyDown(KeyEvent e) {
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int code = e.getKeyCode();
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int count = tall(false);
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int mods = e.getModifiersEx();
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boolean alt = (mods & InputEvent.ALT_DOWN_MASK ) != 0;
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boolean ctrl = (mods & InputEvent.CTRL_DOWN_MASK) != 0;
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// No Alt combinations
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if (alt) return;
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// Goto
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if (ctrl && code == KeyEvent.VK_G) {
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String addr = JOptionPane.showInputDialog(
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this, "Goto:", "Goto", JOptionPane.PLAIN_MESSAGE);
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if (addr != null && addr.trim().length() != 0) {
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try { seek((int) Long.parseLong(addr, 16), count / 3); }
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catch (Exception x) { }
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}
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return;
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}
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// Seek
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switch (code) {
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case KeyEvent.VK_UP : seek(address, 1); break;
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case KeyEvent.VK_DOWN : seek(address, -1); break;
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case KeyEvent.VK_PAGE_UP : seek(address, count); break;
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case KeyEvent.VK_PAGE_DOWN: seek(address, -count); break;
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}
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}
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// Client paint
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private void onPaint(Graphics2D g, int width, int height) {
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var vue = parent.parent.vue;
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int pc = vue.getRegister(VUE.PC, true);
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// The view is being shown for the first time
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if (!shown) {
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shown = true;
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seek(pc, tall(false) / 3);
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return;
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}
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// Configure working variables
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int address = this.address;
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int count = tall(true);
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var data = new byte[count * 4];
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int offset = 0;
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// Disassemble from the current address
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vue.read(address, data, 0, data.length);
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widths[3] = widths[4] = 0;
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for (int y = 0; y < count; y++) {
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var row = y < rows.size() ? rows.get(y) : addRow();
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var color = SystemColor.windowText;
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// Disassemble the instruction
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row.inst.decode(data, offset);
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Disassembler.disassemble(address, row.inst, row);
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updateRow(row);
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// Highlight PC
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if (address == pc) {
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Color bg = SystemColor.control;
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if (client.isFocusOwner()) {
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bg = SystemColor.textHighlight;
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color = SystemColor.textHighlightText;
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}
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g.setColor(bg);
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g.fillRect(
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0, y * CPUWindow.dasmFontHeight,
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width, CPUWindow.dasmFontHeight
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);
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}
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// Configure label text color
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for (var label : row.labels)
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label.setForeground(color);
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// Advance to the next instruction
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int size = address + 2 == pc ? 2 : row.inst.size;
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address += size;
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offset += size;
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}
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// Configure all rows
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for (int y = 0; y < rows.size(); y++) {
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var row = rows.get(y);
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int top = y * CPUWindow.dasmFontHeight;
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// Configure all labels
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for (int z = 0, x = 0; z < 5; z++) {
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var label = row.labels[z];
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// The label is not part of the output
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if (y >= count || widths[z] == 0) {
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label.setVisible(false);
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continue;
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}
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// Configure the label
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label.setLocation(x, top);
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label.setSize(label.getPreferredSize());
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x += widths[z] + CPUWindow.dasmFontHeight;
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}
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}
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// Update the client's size
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var size = client.getPreferredSize();
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width = -CPUWindow.dasmFontHeight + 1;
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for (int x = 0; x < 5; x++)
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if (widths[x] != 0 && (x != 2 || showBytes))
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width += CPUWindow.dasmFontHeight + widths[x];
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if (width == size.width)
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return;
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client.setPreferredSize(new Dimension(width, 0));
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revalidate();
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}
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///////////////////////////////////////////////////////////////////////////
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// Private Methods //
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///////////////////////////////////////////////////////////////////////////
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// Create a new row object
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private Row addRow() {
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var row = new Row();
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row.inst = new Instruction();
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row.labels = new JLabel[5];
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// Initialize columns
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for (int x = 0; x < 5; x++) {
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var label = row.labels[x] = new JLabel();
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if (x != 4)
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label.setFont(CPUWindow.dasmFont);
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client.add(label);
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}
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rows.add(row);
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return row;
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}
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// Determine whether the instruction at an address is in the client view
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private boolean isVisible(int target) {
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int count = Math.max(1, tall(false));
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var data = new byte[count * 4];
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int offset = 0;
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var vue = parent.parent.vue;
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int pc = vue.getRegister(VUE.PC, true);
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target &= 0xFFFFFFFE;
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// Load enough bytes to represent every fully visible instruction
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vue.read(address, data, 0, data.length);
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// Iterate through instructions
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for (int x = 0, address = this.address; x < count; x++) {
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// Determine the instruction's size
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int size = address + 2 == pc ? 2 :
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Instruction.size(data[offset + 1] >> 2 & 0x3F);
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// The current instruction is the target
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if (address == target || size == 4 && address + 2 == target)
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return true;
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// Advance to the next instruction
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address += size;
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offset += size;
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}
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// The instruction is not visible in the view
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return false;
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}
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// Determine the address of the top row of output
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private void seek(int target, int row) {
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var data = new byte[(Math.abs(row) + 9) * 4];
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int offset = 0;
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var vue = parent.parent.vue;
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int pc = vue.getRegister(VUE.PC, true);
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target &= 0xFFFFFFFE;
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// Scrolling down
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if (row <= 0) {
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// Load bytes starting up to 8 instructions prior to the target
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address = target - 32;
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vue.read(address, data, 0, data.length);
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// Iterate through instructions
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for (boolean found = false;;) {
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// Determine the instruction's size
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int size = address + 2 == pc ? 2 :
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Instruction.size(data[offset + 1] >> 2 & 0x3F);
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// The current instruction is the target
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if (address == target || size == 4 && address + 2 == target)
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found = true;
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if (found && row++ == 0)
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break;
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// Advance to the next instruction
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address += size;
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offset += size;
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}
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}
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// Scrolling up
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else {
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||||
// Load bytes starting up to 8 instructions prior to the top row
|
||||
address = target - data.length + 4;
|
||||
vue.read(address, data, 0, data.length);
|
||||
|
||||
// Iterate through instructions
|
||||
var addresses = new int[row]; // Circular buffer
|
||||
for (int index = 0;;) {
|
||||
|
||||
// Determine the instruction's size
|
||||
int size = pc == address + 2 ? 2 :
|
||||
Instruction.size(data[offset + 1] >> 2 & 63);
|
||||
|
||||
// The current instruction is the target
|
||||
if (address == target || size == 4 && address + 2 == target) {
|
||||
address = addresses[index];
|
||||
break;
|
||||
}
|
||||
|
||||
// Advance to the next instruction
|
||||
addresses[index] = address;
|
||||
if (++index == row)
|
||||
index = 0;
|
||||
address += size;
|
||||
offset += size;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// Common processing
|
||||
client.repaint();
|
||||
}
|
||||
|
||||
// Determine how many rows of output are visible
|
||||
private int tall(boolean partial) {
|
||||
return Math.max(1, (client.getHeight() +
|
||||
(partial ? CPUWindow.dasmFontHeight - 1 : 0)
|
||||
) / CPUWindow.dasmFontHeight);
|
||||
}
|
||||
|
||||
// Update a row with its text and measure the column widths
|
||||
private void updateRow(Row row) {
|
||||
|
||||
for (int x = 0; x < 5; x++) {
|
||||
var label = row.labels[x];
|
||||
|
||||
String text = null;
|
||||
switch (x) {
|
||||
case 0: text = row.address ; break;
|
||||
case 1: text = row.bytes ; break;
|
||||
case 2: text = row.mnemonic; break;
|
||||
case 3: text = row.operands; break;
|
||||
}
|
||||
|
||||
if (text != null) {
|
||||
label.setText(text);
|
||||
label.setVisible(x == 1 ? showBytes : true);
|
||||
widths[x] = Math.max(widths[x],label.getPreferredSize().width);
|
||||
} else label.setVisible(false);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
|
@ -6,6 +6,7 @@ import java.util.*;
|
|||
import javax.swing.*;
|
||||
|
||||
// Project imports
|
||||
import util.*;
|
||||
import vue.*;
|
||||
|
||||
// List of CPU registers
|
||||
|
|
@ -48,6 +49,7 @@ class RegisterList extends JScrollPane {
|
|||
super.paintComponent(g);
|
||||
}
|
||||
};
|
||||
client.addMouseListener(Util.onMouse(e->client.requestFocus(), null));
|
||||
client.setBackground(SystemColor.window);
|
||||
client.setFocusable(true);
|
||||
|
||||
|
|
|
|||
|
|
@ -32,13 +32,13 @@ public class Instruction {
|
|||
VUE.SHL_REG, 1, VUE.SHR_REG, 1, VUE.JMP , 1, VUE.SAR_REG, 1,
|
||||
VUE.MUL , 1, VUE.DIV , 1, VUE.MULU , 1, VUE.DIVU , 1,
|
||||
VUE.OR , 1, VUE.AND , 1, VUE.XOR , 1, VUE.NOT , 1,
|
||||
-VUE.MOV_IMM, 2,-VUE.ADD_IMM, 2, VUE.SETF , 2,-VUE.CMP_IMM, 2,
|
||||
VUE.MOV_IMM,-2, VUE.ADD_IMM,-2, VUE.SETF , 2, VUE.CMP_IMM,-2,
|
||||
VUE.SHL_IMM, 2, VUE.SHR_IMM, 2, VUE.CLI , 2, VUE.SAR_IMM, 2,
|
||||
VUE.TRAP , 2, VUE.RETI , 2, VUE.HALT , 2, VUE.ILLEGAL, 0,
|
||||
VUE.LDSR , 2, VUE.STSR , 2, VUE.SEI , 2, BITSTRING , 2,
|
||||
VUE.BCOND , 3, VUE.BCOND , 3, VUE.BCOND , 3, VUE.BCOND , 3,
|
||||
VUE.BCOND , 3, VUE.BCOND , 3, VUE.BCOND , 3, VUE.BCOND , 3,
|
||||
-VUE.MOVEA , 5,-VUE.ADDI , 5, VUE.JR , 4, VUE.JAL , 4,
|
||||
VUE.MOVEA ,-5, VUE.ADDI ,-5, VUE.JR , 4, VUE.JAL , 4,
|
||||
VUE.ORI , 5, VUE.ANDI , 5, VUE.XORI , 5, VUE.MOVHI , 5,
|
||||
VUE.LD_B , 6, VUE.LD_H , 6, VUE.ILLEGAL, 0, VUE.LD_W , 6,
|
||||
VUE.ST_B , 6, VUE.ST_H , 6, VUE.ILLEGAL, 0, VUE.ST_W , 6,
|
||||
|
|
@ -70,7 +70,7 @@ public class Instruction {
|
|||
|
||||
// Determine the size of an instruction given its opcode
|
||||
public static int size(int opcode) {
|
||||
return LOOKUP_OPCODE[opcode << 1 | 1] < 4 ? 2 : 4;
|
||||
return Math.abs(LOOKUP_OPCODE[opcode << 1 | 1]) < 4 ? 2 : 4;
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -80,7 +80,7 @@ public class Instruction {
|
|||
///////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// Default constructor
|
||||
Instruction() { }
|
||||
public Instruction() { }
|
||||
|
||||
|
||||
|
||||
|
|
@ -88,6 +88,14 @@ public class Instruction {
|
|||
// Public Methods //
|
||||
///////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// Decode an instruction from a byte array
|
||||
public void decode(byte[] data, int offset) {
|
||||
bits = (data[offset + 1] & 0xFF) << 24 | (data[offset] & 0xFF) << 16;
|
||||
if (size(bits >>> 26) == 4)
|
||||
bits |= (data[offset + 3] & 0xFF) << 8 | data[offset + 2] & 0xFF;
|
||||
decode(bits);
|
||||
}
|
||||
|
||||
// Decode an instruction from its binary encoding
|
||||
public void decode(int bits) {
|
||||
byte extend; // Sign-extend the immediate operand
|
||||
|
|
@ -96,10 +104,10 @@ public class Instruction {
|
|||
// Configure instance fields
|
||||
this.bits = bits;
|
||||
opcode = bits >> 26 & 63;
|
||||
x = opcode << 1 | 1;
|
||||
extend = LOOKUP_OPCODE[x];
|
||||
format = LOOKUP_OPCODE[x + 1];
|
||||
id = extend < 0 ? -extend : extend;
|
||||
x = opcode << 1;
|
||||
id = LOOKUP_OPCODE[x ];
|
||||
extend = LOOKUP_OPCODE[x + 1];
|
||||
format = extend < 0 ? -extend : extend;
|
||||
size = format < 4 ? 2 : 4;
|
||||
|
||||
// Decode by format
|
||||
|
|
|
|||
Loading…
Reference in New Issue