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(P$POGFSFODF5PLZP
(PͰͭ͘Δ(BNF#PZΤϛϡϨʔλ
·ͨϒϥβͰͷಈ͔͠ํ
!CPLVXFC
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!CPLVXFC
IUUQCMPHCPLVXFCNF
w 8FCϑϩϯτΤϯυΤϯδχΞ
w ΈࠐΈϋʔυΣΞΤϯδχΞ
w ࢁʹੜଉ
CPLVXFC
ࣗݾհ
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ΰʔϧ
ΤϛϡϨʔλͷ࣮ͷجຊ
8FC"TTFNCMZͷมํ๏
ΛΔ͜ͱͰָͦ͠͏ͩͳͱ
ࢥͬͯΒ͑Δͱخ͍͠Ͱ͢
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%&.0
IUUQTCPLVXFCHJUIVCJPHPQIFSCPZ
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جຊεϖοΫ
߲ ֓ཁ
CPU LR35902 4.19MHz 8bit
RAM 8kB
VRAM 8kB
ROM 256k~32MBit
Display 4֊ௐϞϊΫϩɺ160×144υοτ
εϓϥΠτ 8×8 ࠷େ40ݸදࣔ / 1ϥΠϯ্ʹ ࠷େ10ݸදࣔ
എܠ 256×256υοτ
αϯυ ۣܗ2ch+ܗϝϞϦԻݯ1ch+ϊΠζ1ch
௨৴ϙʔτ γϦΞϧ௨৴ϙʔτࡌ
ׂࠐΈػೳ
ύουೖྗׂࠐΈɺγϦΞϧ௨৴ׂࠐΈɺλΠϚʔׂࠐΈ
LCDCׂࠐΈɺVblankׂࠐΈ
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-$%
Y
(16
"16 $16
73".
L#
83".
L#
$BSUSJEHF
CJUόε
30. 3".
ϒϩοΫਤ
-3
.)[
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$16
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Ϩδελ
CJU CJU ֓ཁ
" ' ൚༻ϑϥάϨδελ
# $ ൚༻Ϩδελ
% & ʏ
) - ʏ
41 ελοΫϙΠϯλ
1$ ϓϩάϥϜΧϯλ
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ϑϥάʢ'ʣϨδελ
CJU ུশ ໊শ ৄࡉ
; θϩ ԋࢉ݁Ռ͕̌ͳΒ̍
/ αϒτϥΫτ Ճࢉ໋ྩͳΒ̌ݮࢉ໋ྩͳΒ̍
) ϋʔϑΩϟϦʔ
ԼҐ̐ϏοτͰ͔Β܁Γ্͛
্Ґ̐Ϗοτ͔Β܁ΓԼ͕͛ൃੜͨ͠
Β̍
$ ΩϟϦʔ ԋࢉͰΦʔόʔϑϩʔ͕ൃੜͨ͠Β̍
ະ༻
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Ϩδελ
type Registers struct {
A byte
B byte
C byte
D byte
E byte
H byte
L byte
F byte
}
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Ϩδελ
type CPU struct {
PC types.Word
SP types.Word
Regs Registers
…omitted…
}
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ϑΣον
σίʔυ
࣮ߦ
$16ͷجຊಈ࡞
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$16ͷجຊಈ࡞
func (cpu *CPU) Step() Cycle {
opcode := cpu.fetch()
inst := instructions[opcode]
operands := cpu.fetchOperands(
inst.OperandsSize
)
inst.Execute(cpu, operands)
return inst.Cycles
}
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$16ͷجຊಈ࡞
func (cpu *CPU) Step() Cycle {
opcode := cpu.fetch()
inst := instructions[opcode]
operands := cpu.fetchOperands(
inst.OperandsSize
)
inst.Execute(cpu, operands)
return inst.Cycles
}
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ϑΣον
func (cpu *CPU) fetch() byte {
d := cpu.bus.ReadByte(cpu.PC)
cpu.PC++
return d
}
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ϑΣον
func (cpu *CPU) fetch() byte {
d := cpu.bus.ReadByte(cpu.PC)
cpu.PC++
return d
}
1$ʹ֨ೲ͞ΕͨΞυϨε
͔ΒσʔλΛऔಘ
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Y
Y
Y
Y
Y''
1$ ϓϩάϥϜΧϯλ
ʜ
Y
-%#
O
Y"
ʜ
ϝϞϦ
ϑΣον
1$Yͷ߹
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ϑΣον
func (cpu *CPU) fetch() byte {
d := cpu.bus.ReadByte(cpu.PC)
cpu.PC++
return d
}
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1$ ϓϩάϥϜΧϯλ
ϑΣον
Y
Y
Y
Y
Y'' ʜ
Y
-%#
O
Y"
ʜ
ϝϞϦ
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σίʔυ
func (cpu *CPU) Step() Cycle {
opcode := cpu.fetch()
inst := instructions[opcode]
operands := cpu.fetchOperands(
inst.OperandsSize
)
inst.Execute(cpu, operands)
return inst.Cycles
}
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σίʔυ
type inst struct {
Opcode byte //ɹ໋ྩίʔυɹ
Description string // ໋ྩ໊
OperandsSize uint // Ҿͷ
Cycles uint // ࣮ߦʹඞཁͳαΠΫϧ
Execute func(cpu *CPU, operands []byte)
}
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σίʔυ
var instructions = []*inst{
&inst{0x0, "NOP", 0, 1,
func(cpu *CPU, operands []byte) {
ɹɹ cpu.nop()
}
},
&inst{0x1, "LD BC,nn", 2, 3,
func(cpu *CPU, operands []byte) {
cpu.ldn_nn(…)
}
},
…omitted…
&inst{0x6, "LD B,n", 1, 2,
func(cpu *CPU, operands []byte) {
cpu.ldnn_n(&cpu.Regs.B, operands)
}
},
…omitted…
}
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σίʔυ
var instructions = []*inst{
&inst{0x0, "NOP", 0, 1,
func(cpu *CPU, operands []byte) {
ɹɹ cpu.nop()
}
},
&inst{0x1, "LD BC,nn", 2, 3,
func(cpu *CPU, operands []byte) {
cpu.ldn_nn(…)
}
},
…omitted…
&inst{0x6, "LD B,n", 1, 2,
func(cpu *CPU, operands []byte) {
cpu.ldnn_n(&cpu.Regs.B, operands)
}
},
…omitted…
}
-%#
O
Φϖϥϯυ
$16αΠΫϧ
MEOO@Oؔ
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σίʔυ
func (cpu *CPU) Step() Cycle {
opcode := cpu.fetch()
inst := instructions[opcode]
operands := cpu.fetchOperands(
inst.OperandsSize
)
inst.Execute(cpu, operands)
return inst.Cycles
}
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σίʔυ
func (cpu *CPU) fetchOperands(size uint) []byte {
operands := []byte{}
for i := 0; i < int(size); i++ {
operands = append(operands, cpu.fetch())
}
return operands
}
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1$ ϓϩάϥϜΧϯλ
Y
Y
Y
Y
Y'' ʜ
Y
-%#
O
Y"
ʜ
ϝϞϦ
σίʔυ
ΦϖϥϯυଈY"
͕Ϧʔυ͞ΕΔ
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࣮ߦ
func (cpu *CPU) Step() Cycle {
opcode := cpu.fetch()
inst := instructions[opcode]
operands := cpu.fetchOperands(
inst.OperandsSize
)
inst.Execute(cpu, operands)
return inst.Cycles
}
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࣮ߦ
// LD nn,n
// Description:
// Put value nn into n.
// Use with:
// nn = B,C,D,E,H,L,BC,DE,HL,SP
func (cpu *CPU) ldnn_n(reg *types.Register,
operands []byte) {
*reg = operands[0]
}
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#VT.FNPSZ
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ϝϞϦϚοϓ
L#30.CBOL
L#TXJUDIBCMF30.
L#73".
L#TXJUDIBCMF3".
L#83".
83".NJSSPS
0". 4QSJUF
3".
QFSJQIFSBM
*OUFSOBM3".
*32&OBCMF3FHJTUFS
Y
Y
Y
Y"
Y$
Y&
Y'&
Y'&"
Y''
Y''''
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ϝϞϦϚοϓ
L#30.CBOL
L#TXJUDIBCMF30.
L#73".
L#TXJUDIBCMF3".
L#83".
83".NJSSPS
0". 4QSJUF
3".
QFSJQIFSBM
*OUFSOBM3".
*32&OBCMF3FHJTUFS
Y
Y
Y
Y"
Y$
Y&
Y'&
Y'&"
Y''
Y''''
ΧʔτϦοδ෦
ͷϝϞϦ
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Ϧʔυ
func (b *Bus) ReadByte(addr types.Word) byte {
switch {
case addr >= 0x0000 && addr <= 0x7FFF:
if b.bootmode && addr < 0x0100 {
return BIOS[addr]
}
return b.cartridge.ReadByte(addr)
// Video RAM
case addr >= 0x8000 && addr <= 0x9FFF:
return b.vRAM.Read(addr - 0x8000)
case addr >= 0xA000 && addr <= 0xBFFF:
return b.cartridge.ReadByte(addr)
// Working RAM
case addr >= 0xC000 && addr <= 0xDFFF:
return b.wRAM.Read(addr - 0xC000)
case … omitted …
default:
}
return 0
}
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(16
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MJOFQY
ࠨ͔Βӈʹ
ඳը͍ͯ͘͠
λΠϛϯά
-$%
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-$%
λΠϛϯά
MJOFQY
ը໘ӈ·Ͱ౸ୡͨ͠Β
࣍ͷϥΠϯͷࠨʹΔ
ʢ)CMBOL
͜ͷظؒΛؚΊΔͱ
MJOFDMPDL
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-$%
λΠϛϯά
MJOFQY
MJOF
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࣍ͷඳըͷͨΊʹઌ಄Δ
͜ͷͨΊͷظؒ7#MBOL
MJOFͷ࣌ؒ
-$%
λΠϛϯά
MJOFQY
ϑϨʔϜ
DMPDL
DMPDL
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(16ͷجຊಈ࡞
func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
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(16ͷجຊಈ࡞
func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
(16αΠΫϧ
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func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
(16ͷجຊಈ࡞
ΫϩοΫΛMJOF
ΧϯτΞοϓ
ඳըதϥΠϯΛࣔ͢
ϨδελΛΠϯΫϦϝϯτ
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(16ͷجຊಈ࡞
func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
දࣔൣғͰ͋Ε
എܠMJOFߏங
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(16ͷجຊಈ࡞
func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
࠷ऴϥΠϯͰ
εϓϥΠτΛඳը
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(16ͷجຊಈ࡞
func (g *GPU) Step(cycles uint) {
…omitted…
g.clock += cycles
if g.clock >= 456 {
if g.ly < 144 {
g.buildBGTile()
} else if g.ly == 144 {
g.buildSprites()
} else if g.ly >= 144+10 {
g.ly = 0
…omitted…
}
g.ly++
g.clock -= 456
}
}
7CMBOLظؒྃ
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̔#ZUFº#ZUFͰºαΠζͷը૾Λදݱ
"EESFTTT %BUB
Y Y
Y Y'
Y Y''
Y Y''
Y Y''
Y" Y&
Y$ Y$
Y& Y
"EESFTTT %BUB
Y Y
Y Y'
Y Y#'
Y Y#'
Y Y''
Y# Y&
Y% Y$
Y' Y
എܠͷඳը
̌ʙ̏ͷύϨοτ*%
̎CJUͷ৭ใ
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λΠϧσʔλ
Y
Y''
Y''
Y
λΠϧ൪߸͕̌ʙ·Ͱ
ׂΓͯΒΕΔ
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λΠϧϚοϓ
QY UJMF
QY
UJMF
Y
Y#''
YdY#''Λ
YλΠϧͷ
λΠϧ൪߸ͰຒΊΔ
QY UJMF
QY
UJMF
දࣔՄೳൣғ
දࣔൣғ
Slide 47
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λΠϧϚοϓ
4DSPMM:
Y''
4DSPMM9
Y''
QY
QY
දࣔൣғ
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σʔλͷՄࢹԽ
IUUQTCPLVXFCHJUIVCJPHPQIFSCPZEFCVHIUNM
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എܠͷඳը
func (g *GPU) buildBGTile() {
var tileID int
for x := 0; x < constants.ScreenWidth; x++ {
tileY := ((g.ly + uint(g.scrollY)) % 0x100) / 8 * 32
tileX := x+int(g.scrollX))/8%32
tileID = g.getTileID(
tileY, uint(tileX, g.getBGTilemapAddr()
)
paletteID := g.getBGPaletteID(
tileID, int(g.scrollX%8)+x, (g.ly+uint(g.scrollY))%8
)
rgba := g.getBGPalette(uint(paletteID))
base := ((g.ly)*constants.ScreenWidth + uint(x)) * 4
g.imageData[base] = rgba.R
g.imageData[base+1] = rgba.G
g.imageData[base+2] = rgba.B
g.imageData[base+3] = rgba.A
}
}
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എܠͷඳը
func (g *GPU) buildBGTile() {
var tileID int
for x := 0; x < constants.ScreenWidth; x++ {
tileY := ((g.ly + uint(g.scrollY)) % 0x100) / 8 * 32
tileX := x+int(g.scrollX))/8%32
tileID = g.getTileID(
tileY, uint(tileX, g.getBGTilemapAddr()
)
paletteID := g.getBGPaletteID(
tileID, int(g.scrollX%8)+x, (g.ly+uint(g.scrollY))%8
)
rgba := g.getBGPalette(uint(paletteID))
base := ((g.ly)*constants.ScreenWidth + uint(x)) * 4
g.imageData[base] = rgba.R
g.imageData[base+1] = rgba.G
g.imageData[base+2] = rgba.B
g.imageData[base+3] = rgba.A
}
}
ϥΠϯ
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func (g *GPU) buildBGTile() {
var tileID int
for x := 0; x < constants.ScreenWidth; x++ {
tileY := ((g.ly + uint(g.scrollY)) % 0x100) / 8 * 32
tileX := x+int(g.scrollX))/8%32
tileID = g.getTileID(
tileY, uint(tileX, g.getBGTilemapAddr()
)
paletteID := g.getBGPaletteID(
tileID, int(g.scrollX%8)+x, (g.ly+uint(g.scrollY))%8
)
rgba := g.getBGPalette(uint(paletteID))
base := ((g.ly)*constants.ScreenWidth + uint(x)) * 4
g.imageData[base] = rgba.R
g.imageData[base+1] = rgba.G
g.imageData[base+2] = rgba.B
g.imageData[base+3] = rgba.A
}
}
എܠͷϥΠϯඳը
UJMFͷ9:࠲ඪ
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func (g *GPU) buildBGTile() {
var tileID int
for x := 0; x < constants.ScreenWidth; x++ {
tileY := ((g.ly + uint(g.scrollY)) % 0x100) / 8 * 32
tileX := x+int(g.scrollX))/8%32
tileID = g.getTileID(
tileY, uint(tileX, g.getBGTilemapAddr()
)
paletteID := g.getBGPaletteID(
tileID, int(g.scrollX%8)+x, (g.ly+uint(g.scrollY))%8
)
rgba := g.getBGPalette(uint(paletteID))
base := ((g.ly)*constants.ScreenWidth + uint(x)) * 4
g.imageData[base] = rgba.R
g.imageData[base+1] = rgba.G
g.imageData[base+2] = rgba.B
g.imageData[base+3] = rgba.A
}
}
എܠͷϥΠϯඳը
λΠϧ൪߸Λ
73".͔Βऔಘ
λΠϧ൪߸͔Β
ύϨοτ൪߸Λऔಘ
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എܠͷϥΠϯඳը
func (g *GPU) buildBGTile() {
var tileID int
for x := 0; x < constants.ScreenWidth; x++ {
tileY := ((g.ly + uint(g.scrollY)) % 0x100) / 8 * 32
tileX := x+int(g.scrollX))/8%32
tileID = g.getTileID(
tileY, uint(tileX, g.getBGTilemapAddr()
)
paletteID := g.getBGPaletteID(
tileID, int(g.scrollX%8)+x, (g.ly+uint(g.scrollY))%8
)
rgba := g.getBGPalette(uint(paletteID))
base := ((g.ly)*constants.ScreenWidth + uint(x)) * 4
g.imageData[base] = rgba.R
g.imageData[base+1] = rgba.G
g.imageData[base+2] = rgba.B
g.imageData[base+3] = rgba.A
}
}
όοϑΝʹ3(#"
Λ֨ೲ
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ΤϛϡϨʔλ
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func (g *GB) Next() []byte {
for {
cycles := g.cpu.Step() * 4
g.gpu.Step(cycles)
…omitted…
g.currentCycle += cycles
if g.currentCycle >= 70224 {
g.win.PollKey()
g.currentCycle -= 70224
return g.gpu.GetImageData()
}
}
}
ΤϛϡϨʔλͷجຊಈ࡞
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func (g *GB) Next() []byte {
for {
cycles := g.cpu.Step() * 4
g.gpu.Step(cycles)
…omitted…
g.currentCycle += cycles
if g.currentCycle >= 70224 {
g.win.PollKey()
g.currentCycle -= 70224
return g.gpu.GetImageData()
}
}
}
ΤϛϡϨʔλͷجຊಈ࡞
$16Λ໋ྩ࣮ߦ
$16ΫϩοΫप
ͳͷͰY
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func (g *GB) Next() []byte {
for {
cycles := g.cpu.Step() * 4
g.gpu.Step(cycles)
…omitted…
g.currentCycle += cycles
if g.currentCycle >= 70224 {
g.win.PollKey()
g.currentCycle -= 70224
return g.gpu.GetImageData()
}
}
}
ΤϛϡϨʔλͷجຊಈ࡞
(16ΛܦաΫϩοΫՔಇ
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ΤϛϡϨʔλͷجຊಈ࡞
func (g *GB) Next() []byte {
for {
cycles := g.cpu.Step() * 4
g.gpu.Step(cycles)
…omitted…
g.currentCycle += cycles
if g.currentCycle >= 70224 {
g.win.PollKey()
g.currentCycle -= 70224
return g.gpu.GetImageData()
}
}
}
ੵࢉΫϩοΫ͕̍ϑϨʔϜ
͑ͨΒը૾σʔλΛฦ͢
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func (g *GB) Start() {
t := time.NewTicker(16 * time.Millisecond)
for {
select {
case <-t.C:
buf := g.Next()
g.win.Render(buf)
}
}
}
ΤϛϡϨʔλͷجຊಈ࡞
NTपظͰը૾Λੜ
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ΤϛϡϨʔλͷجຊಈ࡞
func (w *Window) Render(buf []byte) {
imgData := make([]color.RGBA, constants.ScreenWidth*constants.ScreenHeight)
i := 0
for i*4 < len(buf) {
y := constants.ScreenHeight - (i / constants.ScreenWidth) - 1
d := color.RGBA{buf[i*4], buf[i*4+1], buf[i*4+2], buf[i*4+3]
imgData[y*constants.ScreenWidth+i%constants.ScreenWidth] = d
i++
}
w.image.Pix = imgData
bg := color.RGBA{R: 0x0F, G: 0x38, B: 0x0F, A: 0xFF}
w.win.Clear(bg)
spr := pixel.NewSprite(pixel.Picture(w.image),
pixel.R(0, 0, constants.ScreenWidth, constants.ScreenHeight))
spr.Draw(w.win, pixel.IM)
w.updateCamera()
w.win.Update()
}
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5FTUJOH
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ΤϛϡϨʔλͷςετ
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t.Run(tt.name, func(t *testing.T) {
emu := setup(“hello.gb”)
buf := skipFrame(emu, 100)
file, err := os.Create(“hello” + ".png")
defer file.Close()
…omitted…
img := image.NewRGBA(image.Rect(0, 0, 160, 144))
set(img, buf)
if err := png.Encode(file, img); err != nil {
…omitted…
}
})
ΤϛϡϨʔλͷςετ
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t.Run(tt.name, func(t *testing.T) {
emu := setup(“hello.gb”)
buf := skipFrame(emu, 100)
file, err := os.Create(“hello” + ".png")
defer file.Close()
…omitted…
img := image.NewRGBA(image.Rect(0, 0, 160, 144))
set(img, buf)
if err := png.Encode(file, img); err != nil {
…omitted…
}
})
ΤϛϡϨʔλͷςετ
ҙͷϑϨʔϜͷը૾Λ
औಘͰ͖ΔΑ͏ʹ͓ͯ͘͠
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t.Run(tt.name, func(t *testing.T) {
emu := setup(“hello.gb”)
buf := skipFrame(emu, 100)
file, err := os.Create(“hello” + ".png")
defer file.Close()
…omitted…
img := image.NewRGBA(image.Rect(0, 0, 160, 144))
set(img, buf)
if err := png.Encode(file, img); err != nil {
…omitted…
}
})
ΤϛϡϨʔλͷςετ
QOHͱͯ͠อଘ
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ΤϛϡϨʔλͷςετ
reg-cli ./test/actual ./test/expect ./test/diff -R ./report.html
SFHWJ[SFHDMJΛͬͯ
7JTVBM3FHSFTTJPO5FTU
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ΤϛϡϨʔλͷςετ
ը૾ʹ͕ࠩ͋ͬͨΒ$*Λམͱ͢Α͏ʹ
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8FC"TTFNCMZ
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ɾϒϥβͰಈ͘όΠφϦϑΥʔϚοτ
ɾ͍ΖΜͳݴޠ͔ΒXBTNΛు͚Δ
ɾαΠζ͕খ͘͞ϩʔσΟϯά͍࣌ؒ
8FC"TTFNCMZ
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Slide 70 text
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
ϒϥβͰಈ࡞ͤ͞Δઓུ
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ϒϥβͰಈ࡞ͤ͞Δઓུ
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
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8BTN
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const go = new Go();
const res = await fetch("./main.wasm");
const bytes = await res.arrayBuffer();
const { instance } = await WebAssembly.instantiate(
bytes,
go.importObject
);
go.run(instance);
8BTN+4
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const go = new Go();
const res = await fetch("./main.wasm");
const bytes = await res.arrayBuffer();
const { instance } = await WebAssembly.instantiate(
bytes,
go.importObject
);
go.run(instance);
8BTN+4
XBTN@FYFDKTͰੜ͞ΕΔ
JNQPSUΦϒδΣΫτΛ͢
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Slide 75 text
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
ϒϥβͰಈ࡞ͤ͞Δઓུ
Slide 76
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func main() {
w := js.Global()
w.Set("GB", js.FuncOf(newGB))
select {}
}
8BTN(PMBOH
HMPCBMʹ(#Λੜ͢
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func newGB(this js.Value, args []js.Value) interface{} {
buf := []byte{}
for i := 0; i < args[0].Get("length").Int(); i++ {
buf = append(buf, byte(args[0].Index(i).Int()))
}
cart, err := cartridge.NewCartridge(buf)
…omitted…
}
8BTN(PMBOH
+4͔ΒΧʔτϦοδͷ
σʔλΛड͚औΔ
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func newGB(this js.Value, args []js.Value) interface{} {
…omitted…
this.Set("next", js.FuncOf(
func(this js.Value, args []js.Value) interface{} {
img := emu.Next()
return js.TypedArrayOf(img)
}
))
…omitted…
return this
}
8BTN(PMBOH
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func newGB(this js.Value, args []js.Value) interface{} {
…omitted…
this.Set("next", js.FuncOf(
func(this js.Value, args []js.Value) interface{} {
img := emu.Next()
return js.TypedArrayOf(img)
}
))
…omitted…
return this
}
8BTN(PMBOH
OFYUͱ͍͏ؔΛ+4ଆʹFYQPSU
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func newGB(this js.Value, args []js.Value) interface{} {
…omitted…
this.Set("next", js.FuncOf(
func(this js.Value, args []js.Value) interface{} {
img := emu.Next()
return js.TypedArrayOf(img)
}
))
…omitted…
return this
}
8BTN(PMBOH
࣍ͷϑϨʔϜΛ5ZQFE"SSBZͱͯ͠ฦ͢
Slide 81
Slide 81 text
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
ϒϥβͰಈ࡞ͤ͞Δઓུ
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const rom = await fetch("./tobu.gb");
const buf = await rom.arrayBuffer();
8BTN+4
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Slide 83 text
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
ϒϥβͰಈ࡞ͤ͞Δઓུ
Slide 84
Slide 84 text
let gb = new GB(new Uint8Array(buf));
8BTN+4
Slide 85
Slide 85 text
ᶃ8BTNͷॳظԽ
ᶄ+4ଆؔΛFYQPSU
ᶅ+4Ͱ30.σʔλΛऔಘ
ᶆ8BTNʹ30.σʔλΛ͠
ΤϛϡϨʔλ࡞
ᶇSFRVFTU"OJNBUJPO'SBNF
ͰඳըσʔλΛऔಘ͠$BOWBTʹ
ඳը
ϒϥβͰಈ࡞ͤ͞Δઓུ
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const frame = () => {
const img = gb.next();
image.data.set(img);
ctx.putImageData(image, 0, 0);
requestAnimationFrame(frame);
};
frame();
8BTN+4
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GOOS=js GOARCH=wasm go build -tags=wasm
-oɹ“main.wasm” "gopher-boy/wasm_main.go"
Ϗϧυ
Slide 88
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.#
αΠζ
wasm
,#
wasm_exec.js
Slide 89
Slide 89 text
ύϑΥʔϚϯε HP
ϒϥβ ̍'SBNF NT
$ISPNF NT
'JSF'PY NT
4BGBSJ NT
MacBook Air (Retina, 13-inch, 2018)
1.6 GHz Intel Core i5
16 GB 2133 MHz LPDDR3
go1.12.12
TobuTobuGirl
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ύϑΥʔϚϯε
19.11msec
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func (cpu *CPU) applyZeroBy(computed byte) {
if computed == 0 {
cpu.setFlag(Z)
} else {
cpu.clearFlag(Z)
}
}
BQQMZ;FSP#Z HP
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8BTNXBU
wasm2wat main.wasm -o main.wat
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BQQMZ;FSP#Z XBU
(func $github.com_bokuweb_gopher_boy_pkg_cpu.__CPU_.applyZeroBy (type 0) (result i32)
loop ;; label = @1
block ;; label = @2
block ;; label = @3
block ;; label = @4
block ;; label = @5
block ;; label = @6
block ;; label = @7
block ;; label = @8
global.get 1
br_table 0 (;@8;) 0 (;@8;) 1 (;@7;) 2 (;@6;) 3 (;@5;) 3 (;@5;) 4 (;@4;) 4 (;@4;) 5 (;@3;) 6 (;@2;)
end
global.get 2
global.get 4
i32.wrap_i64
i32.load offset=16
i32.le_u
if ;; label = @8
global.get 2
i32.const 8
i32.sub
global.set 2
global.get 2
i64.const 390397952
i64.store
i32.const 0
global.set 1
call $runtime.morestack_noctxt
if ;; label = @9
i32.const 1
return
end
end
global.get 2
i32.const 16
i32.sub
global.set 2
global.get 2
i64.load8_u offset=32
i64.const 56
i64.shl
i64.const 56
i64.shr_u
i64.eqz
i64.extend_i32_u
i32.wrap_i64
i32.eqz
if ;; label = @8
i32.const 6
global.set 1
br 7 (;@1;)
end
end
global.get 2
global.get 2
i64.load offset=24
i64.store
global.get 2
i64.const 4
i32.const 8
i32.sub
global.set 2
global.get 2
i64.const 390397955
i64.store
i32.const 0
global.set 1
call $github.com_bokuweb_gopher_boy_pkg_cpu.__CPU_.setFlag
if ;; label = @7
i32.const 1
return
end
end
end
global.get 2
i32.const 16
i32.add
global.set 2
global.get 2
i32.load16_u offset=2
global.set 0
global.get 2
i32.load16_u
global.set 1
global.get 2
i32.const 8
i32.add
global.set 2
i32.const 0
return
end
global.get 2
global.get 2
i64.load offset=24
i64.store
global.get 2
i64.const 4
i64.store offset=8
global.get 2
i32.const 8
i32.sub
global.set 2
global.get 2
i64.const 390397960
i64.store
i32.const 0
global.set 1
call $github.com_bokuweb_gopher_boy_pkg_cpu.__CPU_.clearFlag
if ;; label = @4
i32.const 1
return
end
end
i32.const 4
global.set 1
br 1 (;@1;)
end
end
unreachable)
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͍͞͝ʹ
ɾήʔϜϘʔΠ͕݁ߏγϯϓϧ
ɹͳͷͰ͓͢͢Ί
ɾ8BTNݱ࣌ͰαΠζ
ɹύϑΥʔϚϯεʹߟྀ͕ඞཁ
ɹ UJOZHPͳͲʹظ
ɾࣗͬͯΈΑ͏͔ͱ
ɹࢥ͍͚ͬͯͨͩͨΒ͍Ͱ͢
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͋Γ͕ͱ͏͍͟͝·ͨ͠✨