srctree

Johan parent 91a197ec f1221d95 16e626fd
Merge pull request #367 from johnor/default-compare-operator-ppu

Default compare operator ppu

core/include/nes/core/ppu_registers.h added: 85, removed: 19, total 66

@@ -181,6 +181,9 @@ struct PpuRegisters {

uint8_t attribute_table_latch;

uint16_t attribute_table_shifter_low;

uint16_t attribute_table_shifter_hi;

[[nodiscard]] constexpr bool operator==(

const PpuRegisters &) const = default;

};

} // namespace n_e_s::core

core/src/ppu.cpp added: 85, removed: 19, total 66

@@ -215,7 +215,6 @@ void Ppu::increment_vram_address() {

void Ppu::execute_pre_render_scanline() {

fetch();

shift_registers();

increase_scroll_counters();

if (cycle() == 1) {

clear_vblank_flag();

@@ -224,7 +223,6 @@ void Ppu::execute_pre_render_scanline() {

void Ppu::execute_visible_scanline() {

fetch();

shift_registers();

increase_scroll_counters();

}

@@ -296,6 +294,7 @@ void Ppu::increase_scroll_counters() {

void Ppu::fetch() {

if ((cycle() >= 1 && cycle() <= 256) ||

(cycle() >= 321 && cycle() <= 336)) {

shift_registers();

const uint16_t background_pattern_table_base_address =

(registers_->ctrl & 0b0001'0000u) ? 0x1000u : 0x0000u;

const uint8_t fine_scroll_y = registers_->vram_addr.fine_scroll_y();

core/test/src/ippu_helpers.cpp added: 85, removed: 19, total 66

@@ -5,14 +5,6 @@

namespace n_e_s::core {

bool operator==(const PpuRegisters &a, const PpuRegisters &b) {

return a.scanline == b.scanline && a.cycle == b.cycle && a.ctrl == b.ctrl &&

a.mask == b.mask && a.status == b.status && a.oamaddr == b.oamaddr &&

a.fine_x_scroll == b.fine_x_scroll && a.vram_addr == b.vram_addr &&

a.temp_vram_addr == b.temp_vram_addr &&

a.write_toggle == b.write_toggle && a.odd_frame == b.odd_frame;

}

// Required by gtest to use pascal case.

// NOLINTNEXTLINE(readability-identifier-naming)

void PrintTo(const PpuRegisters &r, std::ostream *os) {

@@ -20,7 +12,10 @@ void PrintTo(const PpuRegisters &r, std::ostream *os) {

"Cycle: {} Scanline: {} Ctrl: {:#04x} ScrollX: {:#04x} Mask: "

"{:#04x} OamAddr: {:#04x} "

"Status: {:#04x} VramAddr: {:#06x} TmpVramAddr: {:#06x} "

"WriteToggle: {} OddFrame: {}\n",

"WriteToggle: {} OddFrame: {} NameTbl: {:#04x}[{:#04x}] "

"PatternTblHi: {:#06x}[{:#04x}] "

"PatternTblLow: {:#06x}[{:#04x}] "

"Attr: {:#06x}:{:#06x}[{:#04x}]\n",

r.cycle,

r.scanline,

r.ctrl,

@@ -31,7 +26,16 @@ void PrintTo(const PpuRegisters &r, std::ostream *os) {

r.vram_addr.value(),

r.temp_vram_addr.value(),

r.write_toggle,

r.odd_frame);

r.odd_frame,

r.name_table,

r.name_table_latch,

r.pattern_table_shifter_hi,

r.pattern_table_latch_hi,

r.pattern_table_shifter_low,

r.pattern_table_latch_low,

r.attribute_table_shifter_low,

r.attribute_table_shifter_hi,

r.attribute_table_latch);

}

} // namespace n_e_s::core

core/test/src/ippu_helpers.h added: 85, removed: 19, total 66

@@ -6,8 +6,6 @@

namespace n_e_s::core {

bool operator==(const PpuRegisters &a, const PpuRegisters &b);

// Required by gtest to use pascal case.

// NOLINTNEXTLINE(readability-identifier-naming)

void PrintTo(const PpuRegisters &r, std::ostream *os);

core/test/src/test_ppu.cpp added: 85, removed: 19, total 66

@@ -466,6 +466,15 @@ TEST_F(PpuTest, visible_two_sub_cycles) {

expected.cycle = 17;

// Vram should be increased at cycle 8 and 16

expected.vram_addr = PpuVram(0x0002);

expected.name_table = 0x02;

expected.name_table_latch = 0x03;

expected.pattern_table_shifter_hi = 0x4C80;

expected.pattern_table_latch_hi = 0x99;

expected.pattern_table_shifter_low = 0x4000;

expected.pattern_table_latch_low = 0x80;

expected.attribute_table_shifter_low = 0x7F80;

expected.attribute_table_shifter_hi = 0x7F80;

expected.attribute_table_latch = 0x03;

// Clear scrolling

ppu->write_byte(0x2005, 0);

@@ -519,6 +528,15 @@ TEST_F(PpuTest, visible_scanline) {

// Fine scroll should be increase once, and coarse x for each tile except

// the last (31x).

expected.vram_addr = PpuVram(0b001'00'00000'11111);

expected.name_table = 0x1E;

expected.name_table_latch = 0x1F;

expected.pattern_table_shifter_hi = 0x8700;

expected.pattern_table_latch_hi = 0x0F;

expected.pattern_table_shifter_low = 0x8F00;

expected.pattern_table_latch_low = 0x1F;

expected.attribute_table_shifter_low = 0xFF80;

expected.attribute_table_shifter_hi = 0x8000;

expected.attribute_table_latch = 0x01;

// Clear scrolling

ppu->write_byte(0x2005, 0);

@@ -559,6 +577,7 @@ TEST_F(PpuTest, visible_scanline) {

// Cycle 258-320

// During cycle 280-304 the ppu is idle

expected.cycle = 321;

for (int i = 258; i <= 320; ++i) {

const auto pixel = ppu->execute();

EXPECT_FALSE(pixel.has_value());

@@ -569,6 +588,16 @@ TEST_F(PpuTest, visible_scanline) {

// Fetch first two tiles for next scanline (fine scroll y=1)

expected.vram_addr = PpuVram(0b001'00'00000'00010);

expected.cycle = 337;

expected.name_table = 0x02;

expected.name_table_latch = 0x03;

expected.pattern_table_shifter_hi = 0xCC80;

expected.pattern_table_latch_hi = 0x99;

expected.pattern_table_shifter_low = 0xC000;

expected.pattern_table_latch_low = 0x80;

expected.attribute_table_shifter_low = 0xFF80;

expected.attribute_table_shifter_hi = 0x7F80;

expected.attribute_table_latch = 0x03;

// Nametables

EXPECT_CALL(mmu, read_byte(0x2000)).WillOnce(Return(0x02));

EXPECT_CALL(mmu, read_byte(0x2001)).WillOnce(Return(0x03));

@@ -592,6 +621,8 @@ TEST_F(PpuTest, visible_scanline) {

// Two unused nametable fetches.

expected.scanline = 1;

expected.cycle = 0;

expected.name_table = 0x02;

expected.name_table_latch = 0x02;

EXPECT_CALL(mmu, read_byte(0x2000 + 2)).Times(2).WillRepeatedly(Return(2));

for (int i = 337; i <= 340; ++i) {

const auto pixel = ppu->execute();

@@ -608,6 +639,15 @@ TEST_F(PpuTest, pre_render_two_sub_cycles) {

expected.cycle = 17;

// Vram should be increased at cycle 8 and 16

expected.vram_addr = PpuVram(0x0002);

expected.name_table = 0x02;

expected.name_table_latch = 0x03;

expected.pattern_table_shifter_hi = 0x4C80;

expected.pattern_table_latch_hi = 0x99;

expected.pattern_table_shifter_low = 0x4000;

expected.pattern_table_latch_low = 0x80;

expected.attribute_table_shifter_low = 0x7F80;

expected.attribute_table_shifter_hi = 0x7F80;

expected.attribute_table_latch = 0x03;

// Clear scrolling

ppu->write_byte(0x2005, 0);

@@ -664,6 +704,15 @@ TEST_F(PpuTest, pre_render_scanline) {

// Fine scroll should be increase once, and coarse x for each tile except

// the last (31x).

expected.vram_addr = PpuVram(0b001'00'00000'11111);

expected.name_table = 0x1E;

expected.name_table_latch = 0x1F;

expected.pattern_table_shifter_hi = 0x8700;

expected.pattern_table_latch_hi = 0x0F;

expected.pattern_table_shifter_low = 0x8F00;

expected.pattern_table_latch_low = 0x1F;

expected.attribute_table_shifter_low = 0xFF80;

expected.attribute_table_shifter_hi = 0x8000;

expected.attribute_table_latch = 0x01;

// Clear scrolling

ppu->write_byte(0x2005, 0);

@@ -705,6 +754,7 @@ TEST_F(PpuTest, pre_render_scanline) {

// During cycle 280-304 the vertical scroll bits should be reloaded.

expected.vram_addr = PpuVram(0b000'00'00000'00000);

expected.cycle = 321;

for (int i = 258; i <= 320; ++i) {

const auto pixel = ppu->execute();

EXPECT_FALSE(pixel.has_value());

@@ -715,6 +765,16 @@ TEST_F(PpuTest, pre_render_scanline) {

// Fetch first two tiles for next scanline.

expected.vram_addr = PpuVram(0b000'00'00000'00010);

expected.cycle = 337;

expected.name_table = 0x02;

expected.name_table_latch = 0x03;

expected.pattern_table_shifter_hi = 0xCC80;

expected.pattern_table_latch_hi = 0x99;

expected.pattern_table_shifter_low = 0xC000;

expected.pattern_table_latch_low = 0x80;

expected.attribute_table_shifter_low = 0xFF80;

expected.attribute_table_shifter_hi = 0x7F80;

expected.attribute_table_latch = 0x03;

// Nametables

EXPECT_CALL(mmu, read_byte(0x2000)).WillOnce(Return(0x02));

EXPECT_CALL(mmu, read_byte(0x2001)).WillOnce(Return(0x03));

@@ -739,6 +799,8 @@ TEST_F(PpuTest, pre_render_scanline) {

expected.scanline = 0;

expected.cycle = 0;

expected.odd_frame = false;

expected.name_table = 0x02;

expected.name_table_latch = 0x02;

EXPECT_CALL(mmu, read_byte(0x2000 + 2)).Times(2).WillRepeatedly(Return(2));

for (int i = 337; i <= 340; ++i) {

const auto pixel = ppu->execute();