| 1 | package com.rox.debug.cpu; | |
| 2 | ||
| 3 | import com.rox.cpu.mos6502.MOS6502Snapshot; | |
| 4 | import com.rox.cpu.mos6502.assembler.DisassembledInstruction; | |
| 5 | ||
| 6 | import java.util.List; | |
| 7 | import java.util.Optional; | |
| 8 | import java.util.Locale; | |
| 9 | ||
| 10 | /** | |
| 11 | * One-line text renderings of CPU state, shared by every CPU view - the flagged-issue {@code state.txt} | |
| 12 | * and the live CPU state panel - so both read the same way. | |
| 13 | */ | |
| 14 | public final class CpuStateText { | |
| 15 | /** Where a line's state starts: wide enough for the longest instruction, {@code $FFFF ORA ($40),Y}. */ | |
| 16 | private static final int STATE_COLUMN = 24; | |
| 17 | ||
| 18 | private CpuStateText(){ | |
| 19 | } | |
| 20 | ||
| 21 | /** {@code PC: $8123 A: $01 X: $02 Y: $03 SP: $FD} */ | |
| 22 | public static String registers(final MOS6502Snapshot cpu){ | |
| 23 |
1
1. registers : replaced return value with "" for com/rox/debug/cpu/CpuStateText::registers → KILLED |
return String.format("PC: $%04X A: $%02X X: $%02X Y: $%02X SP: $%02X", |
| 24 | cpu.pc(), cpu.a(), cpu.x(), cpu.y(), cpu.stackPointer()); | |
| 25 | } | |
| 26 | ||
| 27 | /** {@code Nv-BdIzC} - the status register's {@code NV-BDIZC} bits, uppercase when set. */ | |
| 28 | public static String flags(final MOS6502Snapshot cpu){ | |
| 29 |
1
1. flags : replaced return value with "" for com/rox/debug/cpu/CpuStateText::flags → KILLED |
return new StringBuilder() |
| 30 |
1
1. flags : negated conditional → KILLED |
.append(cpu.negative() ? 'N' : 'n') |
| 31 |
1
1. flags : negated conditional → KILLED |
.append(cpu.signedOverflow() ? 'V' : 'v') |
| 32 | .append('-') | |
| 33 |
1
1. flags : negated conditional → KILLED |
.append(cpu.breakFlag() ? 'B' : 'b') |
| 34 |
1
1. flags : negated conditional → KILLED |
.append(cpu.decimal() ? 'D' : 'd') |
| 35 |
1
1. flags : negated conditional → KILLED |
.append(cpu.interruptDisable() ? 'I' : 'i') |
| 36 |
1
1. flags : negated conditional → KILLED |
.append(cpu.zero() ? 'Z' : 'z') |
| 37 |
1
1. flags : negated conditional → KILLED |
.append(cpu.carry() ? 'C' : 'c') |
| 38 | .toString(); | |
| 39 | } | |
| 40 | ||
| 41 | /** {@code IRQ line: clear NMI pending: yes} */ | |
| 42 | public static String interruptLines(final MOS6502Snapshot cpu){ | |
| 43 |
3
1. interruptLines : replaced return value with "" for com/rox/debug/cpu/CpuStateText::interruptLines → KILLED 2. interruptLines : negated conditional → KILLED 3. interruptLines : negated conditional → KILLED |
return "IRQ line: " + (cpu.irqLineAsserted() ? "asserted" : "clear") + " NMI pending: " + (cpu.nmiPending() ? "yes" : "no"); |
| 44 | } | |
| 45 | ||
| 46 | /** | |
| 47 | * {@code > $E45B JMP $E45B A:B0 X:0F Y:26 SP:FF Nv-bdIzc} - the instruction, then the state it started | |
| 48 | * with (no PC: that's the instruction's own address), plus {@code irq}/{@code nmi} when active. | |
| 49 | */ | |
| 50 | public static String instruction(final DisassembledInstruction instruction, final boolean atPc, final MOS6502Snapshot before){ | |
| 51 |
1
1. instruction : replaced return value with "" for com/rox/debug/cpu/CpuStateText::instruction → KILLED |
return String.format("%-" + STATE_COLUMN + "s%s", instruction(instruction, atPc), state(before)); |
| 52 | } | |
| 53 | ||
| 54 | /** {@code A:B0 X:0F Y:26 SP:FF Nv-bdIzc}, plus {@code irq}/{@code nmi} when active. */ | |
| 55 | public static String state(final MOS6502Snapshot cpu){ | |
| 56 |
1
1. state : replaced return value with "" for com/rox/debug/cpu/CpuStateText::state → KILLED |
return String.format("A:%02X X:%02X Y:%02X SP:%02X %s%s%s", cpu.a(), cpu.x(), cpu.y(), cpu.stackPointer(), flags(cpu), |
| 57 |
2
1. state : negated conditional → KILLED 2. state : negated conditional → KILLED |
cpu.irqLineAsserted() ? " irq" : "", cpu.nmiPending() ? " nmi" : ""); |
| 58 | } | |
| 59 | ||
| 60 | /** {@code > $8123 JMP $9000} for the instruction at the PC, {@code $8126 INX} otherwise. */ | |
| 61 | public static String instruction(final DisassembledInstruction instruction, final boolean atPc){ | |
| 62 |
2
1. instruction : replaced return value with "" for com/rox/debug/cpu/CpuStateText::instruction → KILLED 2. instruction : negated conditional → KILLED |
return (atPc ? "> " : " ") + String.format("$%04X %s", instruction.address(), instruction.formatted()); |
| 63 | } | |
| 64 | ||
| 65 | /** | |
| 66 | * {@code Clock: 1,789,773 Hz of 1,789,773 Hz (100.0%)} - below 100% while a game slows down means the | |
| 67 | * emulator can't keep up; near 100% means the slowdown is the game's own. | |
| 68 | */ | |
| 69 | public static String clockRate(final double measuredHz, final long intendedHz){ | |
| 70 | //Locale.ROOT: the same ',' grouping and '.' decimal point whatever the machine's locale | |
| 71 |
3
1. clockRate : Replaced double multiplication with division → KILLED 2. clockRate : replaced return value with "" for com/rox/debug/cpu/CpuStateText::clockRate → KILLED 3. clockRate : Replaced double division with multiplication → KILLED |
return String.format(Locale.ROOT, "Clock: %,.0f Hz of %,d Hz (%.1f%%)", measuredHz, intendedHz, 100.0 * measuredHz / intendedHz); |
| 72 | } | |
| 73 | ||
| 74 | /** | |
| 75 | * The whole CPU state view as text: run state and clock rate, registers, flags, interrupt lines, | |
| 76 | * then the instructions on one time axis running bottom to top - the oldest recent instruction at | |
| 77 | * the bottom, the latest above it, then the current one ({@code >}) and the next | |
| 78 | * {@code upcomingCount - 1} above that, furthest ahead at the top. | |
| 79 | */ | |
| 80 | public static String panel(final CpuDebugSource source, final int upcomingCount){ | |
| 81 |
1
1. panel : replaced return value with "" for com/rox/debug/cpu/CpuStateText::panel → KILLED |
return panel(source.state(), source, upcomingCount); |
| 82 | } | |
| 83 | ||
| 84 | /** As {@link #panel(CpuDebugSource, int)}, for a CPU state already read - so a caller can use the same read elsewhere. */ | |
| 85 | public static String panel(final MOS6502Snapshot cpu, final CpuDebugSource source, final int upcomingCount){ | |
| 86 | final StringBuilder out = new StringBuilder(); | |
| 87 |
1
1. panel : negated conditional → KILLED |
out.append(source.isPaused() ? "PAUSED" : "Running").append(" ") |
| 88 | .append(clockRate(source.measuredHz(), source.intendedHz())).append('\n'); | |
| 89 | out.append(registers(cpu)).append('\n'); | |
| 90 | out.append("Flags: ").append(flags(cpu)).append(" (NV-BDIZC)\n"); | |
| 91 | out.append(interruptLines(cpu)).append("\n\n"); | |
| 92 | out.append("--- Next (furthest ahead at top) ---\n"); | |
| 93 | final List<DisassembledInstruction> upcoming = source.upcomingInstructions(upcomingCount); | |
| 94 | final Optional<MOS6502Snapshot> currentState = source.currentInstructionState(); | |
| 95 |
3
1. panel : negated conditional → KILLED 2. panel : changed conditional boundary → KILLED 3. panel : Replaced integer subtraction with addition → KILLED |
for (int i = upcoming.size() - 1; i >= 0; i--){ |
| 96 | //only the current instruction has a state - the rest haven't run yet | |
| 97 |
2
1. panel : negated conditional → KILLED 2. panel : negated conditional → KILLED |
final String line = i == 0 && currentState.isPresent() |
| 98 | ? instruction(upcoming.get(i), true, currentState.get()) | |
| 99 |
1
1. panel : negated conditional → KILLED |
: instruction(upcoming.get(i), i == 0); |
| 100 | out.append(line).append('\n'); | |
| 101 | } | |
| 102 | out.append("--- Recent (latest at top) ---\n"); | |
| 103 | final List<TracedInstruction> recent = source.recentInstructions(); | |
| 104 |
3
1. panel : changed conditional boundary → KILLED 2. panel : negated conditional → KILLED 3. panel : Replaced integer subtraction with addition → KILLED |
for (int i = recent.size() - 1; i >= 0; i--){ |
| 105 | out.append(instruction(recent.get(i).instruction(), false, recent.get(i).before())).append('\n'); | |
| 106 | } | |
| 107 |
1
1. panel : replaced return value with "" for com/rox/debug/cpu/CpuStateText::panel → KILLED |
return out.toString(); |
| 108 | } | |
| 109 | } | |
Mutations | ||
| 23 |
1.1 |
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| 29 |
1.1 |
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| 30 |
1.1 |
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| 31 |
1.1 |
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| 33 |
1.1 |
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| 34 |
1.1 |
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| 35 |
1.1 |
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| 36 |
1.1 |
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| 37 |
1.1 |
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| 43 |
1.1 2.2 3.3 |
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| 51 |
1.1 |
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| 56 |
1.1 |
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| 57 |
1.1 2.2 |
|
| 62 |
1.1 2.2 |
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| 71 |
1.1 2.2 3.3 |
|
| 81 |
1.1 |
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| 87 |
1.1 |
|
| 95 |
1.1 2.2 3.3 |
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| 97 |
1.1 2.2 |
|
| 99 |
1.1 |
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| 104 |
1.1 2.2 3.3 |
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| 107 |
1.1 |