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package com.rox.ppu; |
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import static com.rox.ByteUtil.BYTE_MASK; |
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/** |
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6
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* VPHB SINN |
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7
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* V (bit 7): NMI enable |
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8
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* P (bit 6): PPU master/slave select - unmodeled |
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9
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* H (bit 5): sprite size (0=8x8, 1=8x16) |
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10
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* B (bit 4): background pattern table select (0=$0000, 1=$1000) |
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11
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* S (bit 3): sprite pattern table select for 8x8 sprites - ignored in 8x16 mode, where the tile |
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12
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* index's own low bit selects the table instead (0=$0000, 1=$1000) |
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13
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* I (bit 2): VRAM address increment per $2007 access (0=+1, 1=+32) |
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14
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* NN (bits 1-0): base nametable select (0-3) |
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*/ |
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public class PPUControlRegister { |
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private static final int NMI_ENABLE_BIT = 0x80; |
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private static final int SPRITE_SIZE_BIT = 0x20; |
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private static final int BACKGROUND_PATTERN_TABLE_SELECT_BIT = 0x10; |
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20
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private static final int SPRITE_PATTERN_TABLE_SELECT_BIT = 0x08; |
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private static final int VRAM_INCREMENT_BIT = 0x04; |
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private static final int NAMETABLE_SELECT_MASK = 0x03; |
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private static final int PATTERN_TABLE_SIZE = 0x1000; |
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private static final int VRAM_INCREMENT_32 = 32; |
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private static final int VRAM_INCREMENT_1 = 1; |
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private final int value; |
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PPUControlRegister(final int registerValue){ |
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31
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1
1. <init> : Replaced bitwise AND with OR → KILLED
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value = registerValue & BYTE_MASK; |
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32
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} |
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public boolean nmiEnabled(){ |
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35
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3
1. nmiEnabled : negated conditional → KILLED
2. nmiEnabled : replaced boolean return with true for com/rox/ppu/PPUControlRegister::nmiEnabled → KILLED
3. nmiEnabled : Replaced bitwise AND with OR → KILLED
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return (value & NMI_ENABLE_BIT) != 0; |
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} |
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public boolean tallSprites(){ |
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3
1. tallSprites : replaced boolean return with true for com/rox/ppu/PPUControlRegister::tallSprites → KILLED
2. tallSprites : Replaced bitwise AND with OR → KILLED
3. tallSprites : negated conditional → KILLED
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return (value & SPRITE_SIZE_BIT) != 0; |
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} |
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public int backgroundPatternTableBase(){ |
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2
1. backgroundPatternTableBase : Replaced bitwise AND with OR → KILLED
2. backgroundPatternTableBase : negated conditional → KILLED
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return (value & BACKGROUND_PATTERN_TABLE_SELECT_BIT) != 0 ? PATTERN_TABLE_SIZE : 0; |
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} |
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/** Only meaningful for 8x8 sprites - 8x16 sprites pick their table from the tile index's own low bit instead. */ |
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public int spritePatternTableBase(){ |
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2
1. spritePatternTableBase : negated conditional → KILLED
2. spritePatternTableBase : Replaced bitwise AND with OR → KILLED
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return (value & SPRITE_PATTERN_TABLE_SELECT_BIT) != 0 ? PATTERN_TABLE_SIZE : 0; |
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} |
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public int vramIncrement(){ |
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3
1. vramIncrement : replaced int return with 0 for com/rox/ppu/PPUControlRegister::vramIncrement → KILLED
2. vramIncrement : negated conditional → KILLED
3. vramIncrement : Replaced bitwise AND with OR → KILLED
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return (value & VRAM_INCREMENT_BIT) != 0 ? VRAM_INCREMENT_32 : VRAM_INCREMENT_1; |
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} |
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public int nametableSelect(){ |
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2
1. nametableSelect : replaced int return with 0 for com/rox/ppu/PPUControlRegister::nametableSelect → KILLED
2. nametableSelect : Replaced bitwise AND with OR → KILLED
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return value & NAMETABLE_SELECT_MASK; |
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} |
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public int rawValue(){ |
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1
1. rawValue : replaced int return with 0 for com/rox/ppu/PPUControlRegister::rawValue → KILLED
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return value; |
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} |
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} |
| | Mutations |
| 31 |
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1.1
Location : <init>
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:constructorMasksToASingleByte()] Replaced bitwise AND with OR → KILLED
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| 35 |
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1.1
Location : nmiEnabled
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:nmiEnabledReflectsBitSeven()] negated conditional → KILLED
2.2
Location : nmiEnabled
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:nmiEnabledReflectsBitSeven()] replaced boolean return with true for com/rox/ppu/PPUControlRegister::nmiEnabled → KILLED
3.3
Location : nmiEnabled
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:nmiEnabledReflectsBitSeven()] Replaced bitwise AND with OR → KILLED
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| 39 |
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1.1
Location : tallSprites
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:tallSpritesReflectsBitFive()] replaced boolean return with true for com/rox/ppu/PPUControlRegister::tallSprites → KILLED
2.2
Location : tallSprites
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:tallSpritesReflectsBitFive()] Replaced bitwise AND with OR → KILLED
3.3
Location : tallSprites
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:tallSpritesReflectsBitFive()] negated conditional → KILLED
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| 43 |
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1.1
Location : backgroundPatternTableBase
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:backgroundPatternTableBaseSelectsBetweenZeroAndOneThousand()] Replaced bitwise AND with OR → KILLED
2.2
Location : backgroundPatternTableBase
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:backgroundPatternTableBaseSelectsBetweenZeroAndOneThousand()] negated conditional → KILLED
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| 48 |
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1.1
Location : spritePatternTableBase
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:spritePatternTableBaseSelectsBetweenZeroAndOneThousand()] negated conditional → KILLED
2.2
Location : spritePatternTableBase
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:spritePatternTableBaseSelectsBetweenZeroAndOneThousand()] Replaced bitwise AND with OR → KILLED
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| 52 |
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1.1
Location : vramIncrement
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:vramIncrementIsThirtyTwoWhenBitSetOtherwiseOne()] replaced int return with 0 for com/rox/ppu/PPUControlRegister::vramIncrement → KILLED
2.2
Location : vramIncrement
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:vramIncrementIsThirtyTwoWhenBitSetOtherwiseOne()] negated conditional → KILLED
3.3
Location : vramIncrement
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:vramIncrementIsThirtyTwoWhenBitSetOtherwiseOne()] Replaced bitwise AND with OR → KILLED
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| 56 |
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1.1
Location : nametableSelect
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:nametableSelectReflectsTheLowTwoBitsOnly()] replaced int return with 0 for com/rox/ppu/PPUControlRegister::nametableSelect → KILLED
2.2
Location : nametableSelect
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:nametableSelectReflectsTheLowTwoBitsOnly()] Replaced bitwise AND with OR → KILLED
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| 60 |
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1.1
Location : rawValue
Killed by : com.rox.ppu.PPUControlRegisterTest.[engine:junit-jupiter]/[class:com.rox.ppu.PPUControlRegisterTest]/[method:rawValueReturnsExactlyWhatWasConstructedWith()] replaced int return with 0 for com/rox/ppu/PPUControlRegister::rawValue → KILLED
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