How to use Encode method of powerpc Package

Best Syzkaller code snippet using powerpc.Encode

powerpc_encoding.go

Source:powerpc_encoding.go

...73		}74	}75	return result76}77// EncodeInstrBForm handles encoding a given opcode, BO, BI, BD, AA and LK.78// I-form assumes:79//   - 6 bits for the opcode80//   - 5 bits for BO81//   - 5 bits for BI82//   - 24 bits for BD83//   - 1 bit for absolute (AA)84//   - 1 bit for should store in link register (LK)85func EncodeInstrBForm(opcode byte, BO Register, BI Register, BD [3]byte, AA bool, LK bool) Instruction {86	opBits := getBits(opcode)87	bOBits := getBits(byte(BO))88	bIBits := getBits(byte(BI))89	bDTwo := getBits(BD[1])90	bDThree := getBits(BD[2])91	instr := [4]Bits{92		{93			// We need the upper six bits for our opcode.94			opBits[2], opBits[3], opBits[4], opBits[5], opBits[6], opBits[7],95			// We need the upper five bits for BO and BI.96			bOBits[3], bOBits[4],97		},98		{99			bOBits[5], bOBits[6], bOBits[7], bIBits[3], bIBits[4], bIBits[5], bIBits[6], bIBits[7],100		},101		{102			// We need the upper 14 bits for the destination branch (BD).103			bDTwo[2], bDTwo[3], bDTwo[4], bDTwo[5], bDTwo[6], bDTwo[7], bDThree[0], bDThree[1],104		},105		{106			bDThree[2], bDThree[3], bDThree[4], bDThree[5], bDThree[6], bDThree[7],107			AA,108			LK,109		},110	}111	return Instruction{instr[0].getByte(), instr[1].getByte(), instr[2].getByte(), instr[3].getByte()}112}113// EncodeInstrDForm handles encoding a given opcode, RT, RA and SI.114// D-form assumes:115//  - 6 bits for the opcode116//  - 5 for rT117//  - 5 for rA118//  - 16 for SI119func EncodeInstrDForm(opcode byte, rT Register, rA Register, value uint16) Instruction {120	var instr [2]Bits121	opBits := getBits(opcode)122	rTBits := getBits(byte(rT))123	rABits := getBits(byte(rA))124	instr[0] = Bits{125		// We need the upper six bits for our opcode.126		opBits[2],127		opBits[3],128		opBits[4],129		opBits[5],130		opBits[6],131		opBits[7],132		// Next, the lower two bits for rT.133		rTBits[3],134		rTBits[4],135	}136	instr[1] = Bits{137		// Third, the lower three bits for rT.138		rTBits[5],139		rTBits[6],140		rTBits[7],141		// Finally, all five lowest bits for rA.142		rABits[3],143		rABits[4],144		rABits[5],145		rABits[6],146		rABits[7],147	}148	firstInstr := instr[0].getByte()149	secondInstr := instr[1].getByte()150	valByte := twoByte(value)151	return Instruction{firstInstr, secondInstr, valByte[0], valByte[1]}152}153// EncodeInstrIForm handles encoding a given opcode, LI, AA and LK.154// I-form assumes:155//   - 6 bits for the opcode156//   - 24 bits for LI157//   - 1 bit for absolute (AA)158//   - 1 bit for should store in link register (LK)159func EncodeInstrIForm(opcode byte, LI [3]byte, AA bool, LK bool) Instruction {160	opBits := getBits(opcode)161	liOne := getBits(LI[0])162	liTwo := getBits(LI[1])163	liThree := getBits(LI[2])164	instr := [4]Bits{165		{166			// We need the upper six bits for our opcode.167			opBits[2], opBits[3], opBits[4], opBits[5], opBits[6], opBits[7],168			// Otherwise, copy LI as-is.169			liOne[0], liOne[1],170		},171		{172			liOne[2], liOne[3], liOne[4], liOne[5], liOne[6], liOne[7], liTwo[0], liTwo[1],173		},174		{175			liTwo[2], liTwo[3], liTwo[4], liTwo[5], liTwo[6], liTwo[7], liThree[0], liThree[1],176		},177		{178			liThree[2], liThree[3], liThree[4], liThree[5], liThree[6], liThree[7],179			// Copy AA and LK as-is.180			AA,181			LK,182		},183	}184	return Instruction{instr[0].getByte(), instr[1].getByte(), instr[2].getByte(), instr[3].getByte()}185}186// EncodeInstrXForm handles encoding a given opcode, rS, rA, rB, an extended opcode and rC.187// X-form assumes:188//   - 6 bits for the opcode189//   - 5 bits for rS190//   - 5 bits for rA191//   - 5 bits for rB192//   - 10 bits for XO (extended opcode)193//   - 1 bit for rC (dependent on the condition register)194func EncodeInstrXForm(opcode byte, rS Register, rA Register, rB Register, XO uint16, rC bool) Instruction {195	opBits := getBits(opcode)196	rSBits := getBits(byte(rS))197	rABits := getBits(byte(rA))198	rBBits := getBits(byte(rB))199	extendedOP1 := getBits(twoByte(XO)[0])200	extendedOP2 := getBits(twoByte(XO)[1])201	instr := [4]Bits{202		{203			// We need the upper six bits for our opcode.204			opBits[2], opBits[3], opBits[4], opBits[5], opBits[6], opBits[7],205			// We need the upper five bits for rS, rA and rB.206			rSBits[3], rSBits[4],207		},208		{209			rSBits[5], rSBits[6], rSBits[7], rABits[3], rABits[4], rABits[5], rABits[6], rABits[7],210		},211		{212			// We need the upper 10 bits for the extended opcode.213			rBBits[3], rBBits[4], rBBits[5], rBBits[6], rBBits[7], extendedOP1[6], extendedOP1[7], extendedOP2[0],214		},215		{216			extendedOP2[1], extendedOP2[2], extendedOP2[3], extendedOP2[4], extendedOP2[5], extendedOP2[6], extendedOP2[7], rC,217		},218	}219	return Instruction{instr[0].getByte(), instr[1].getByte(), instr[2].getByte(), instr[3].getByte()}220}221// EncodeInstrXFXForm handles encoding a given opcode, rS, spr, an extended opcode and rC.222// XFX-form assumes:223//   - 6 bits for the opcode224//   - 5 bits for rS225//   - 10 bits for spr (special-purpose register)226//   - 10 bits for XO (extended opcode)227//   - 1 bit for rC (dependent on the condition register)228func EncodeInstrXFXForm(opcode byte, rS Register, spr SpecialRegister, XO uint16, rC bool) Instruction {229	opBits := getBits(opcode)230	rSBits := getBits(byte(rS))231	sprBytes := twoByte(uint16(spr))232	sprBitsOne := getBits(sprBytes[0])233	sprBitsTwo := getBits(sprBytes[1])234	extendedOP1 := getBits(twoByte(XO)[0])235	extendedOP2 := getBits(twoByte(XO)[1])236	instr := [4]Bits{237		{238			// We need the upper six bits for our opcode.239			opBits[2], opBits[3], opBits[4], opBits[5], opBits[6], opBits[7],240			// We need the upper five bits for rS.241			rSBits[3], rSBits[4],242		},...

powerpc.go

Source:powerpc.go

...44	return [4]byte{0x4c, 0xc6, 0x31, 0x82}45}46// ADDI represents the addi PowerPC instruction.47func ADDI(rT Register, rA Register, value uint16) Instruction {48	return EncodeInstrDForm(14, rT, rA, value)49}50// LI represents the li mnemonic on PowerPC.51func LI(rT Register, value uint16) Instruction {52	return ADDI(rT, 0, value)53}54// SUBI represents the subi mnemonic on PowerPC.55// TODO: handle negative values properly?56func SUBI(rT Register, rA Register, value uint16) Instruction {57	return ADDI(rT, 0, -value)58}59// ADDIS represents the addis PowerPC instruction.60func ADDIS(rT Register, rA Register, value uint16) Instruction {61	return EncodeInstrDForm(15, rT, rA, value)62}63// LIS represents the lis mnemonic on PowerPC.64func LIS(rT Register, value uint16) Instruction {65	return ADDIS(rT, 0, value)66}67// OR represents the or PowerPC instruction.68func OR(rS Register, rA Register, rB Register, rC bool) Instruction {69	return EncodeInstrXForm(31, rS, rA, rB, 444, rC)70}71// ORI represents the ori PowerPC instruction.72func ORI(rS Register, rA Register, value uint16) Instruction {73	return EncodeInstrDForm(24, rS, rA, value)74}75// STH represents the sth PowerPC instruction.76func STH(rS Register, offset uint16, rA Register) Instruction {77	return EncodeInstrDForm(44, rS, rA, offset)78}79// EIEIO represents the eieio PowerPC instruction.80func EIEIO() Instruction {81	return EncodeInstrXForm(31, 0, 0, 0, 854, false)82}83// STW represents the stw PowerPC instruction.84func STW(rS Register, offset uint16, rA Register) Instruction {85	return EncodeInstrDForm(36, rS, rA, offset)86}87// STB represents the stb PowerPC instruction.88func STB(rS Register, offset uint16, rA Register) Instruction {89	return EncodeInstrDForm(38, rS, rA, offset)90}91// LWZ represents the lwz PowerPC instruction.92func LWZ(rT Register, offset uint16, rA Register) Instruction {93	return EncodeInstrDForm(32, rT, rA, offset)94}95// NOP represents the nop mnemonic for PowerPC.96func NOP() Instruction {97	return ORI(R0, R0, 0)98}99// CMPWI represents the cmpwi mnemonic for PowerPC.100// It does not support any other CR fields asides from 0.101func CMPWI(rA Register, value uint16) Instruction {102	return EncodeInstrDForm(11, 0, rA, value)103}104// SYNC represents the sync PowerPC instruction.105func SYNC() Instruction {106	return EncodeInstrXForm(31, 0, 0, 0, 598, false)107}108// MTSPR represents the mtspr PowerPC instruction.109func MTSPR(spr SpecialRegister, rS Register) Instruction {110	return EncodeInstrXFXForm(31, rS, spr, 467, false)111}112// MFSPR represents the mfspr PowerPC instruction.113func MFSPR(rS Register, spr SpecialRegister) Instruction {114	return EncodeInstrXFXForm(31, rS, spr, 339, false)115}116// STWU represents the stwu PowerPC instruction.117func STWU(rS Register, rA Register, offset uint16) Instruction {118	return EncodeInstrDForm(37, rS, rA, offset)119}120// calcDestination determines the proper offset from a given121// calling address and target address.122func calcDestination(from uint, target uint) [3]byte {123	offset := target - from124	if offset > 0x00FFFFFF {125		offset = 0x10001 - (uint(int(from) - int(target)))126	}127	// Sign-extend by two bytes128	calc := uint32(offset >> 2)129	return uint24(calc)130}131// BL represents the bl PowerPC instruction.132// It calculates the offset from the given current address and the given133// target address, saving the current address in the link register. It then branches.134func BL(current uint, target uint) Instruction {135	return EncodeInstrIForm(18, calcDestination(current, target), false, true)136}137// B represents the b PowerPC instruction.138// It calculates the offset from the given current address139// and the given target address, and then branches.140func B(current uint, target uint) Instruction {141	return EncodeInstrIForm(18, calcDestination(current, target), false, false)142}143// BNE represents the bne PowerPC instruction.144// It calculates the offset from the given current address145// and the given target address, and then branches.146func BNE(current uint, target uint) Instruction {147	return EncodeInstrBForm(16, 4, 2, calcDestination(current, target), false, false)148}...

pseudo.go

Source:pseudo.go

...61	//	ori     rn,rn,name##@higher62	//	rldicr  rn,rn,32,3163	//	oris    rn,rn,name##@h64	//	ori     rn,rn,name##@l65	gen.byte(gen.imap["addis"].EncodeParam(map[string]uint{66		"RT": reg,67		"RA": 0, // In "addis", '0' means 0, not GPR0 .68		"SI": uint((v >> 48) & 0xffff)},69		nil))70	gen.byte(gen.imap["ori"].EncodeParam(map[string]uint{71		"RA": reg,72		"RS": reg,73		"UI": uint((v >> 32) & 0xffff)},74		nil))75	gen.byte(gen.imap["rldicr"].EncodeParam(map[string]uint{76		"RA": reg,77		"RS": reg,78		"SH": 32,79		"ME": 31},80		nil))81	gen.byte(gen.imap["oris"].EncodeParam(map[string]uint{82		"RA": reg,83		"RS": reg,84		"UI": uint((v >> 16) & 0xffff)},85		nil))86	gen.byte(gen.imap["ori"].EncodeParam(map[string]uint{87		"RA": reg,88		"RS": reg,89		"UI": uint(v & 0xffff)},90		nil))91}92func (gen *generator) sc(lev uint) {93	n := gen.r.Intn(9)94	// Valid hcall humbers at the momemt are: 4..0x45095	gen.ld64(3, uint64(gen.r.Intn(4+(0x450-4)/4)))96	for i := 4; i < n+4; i++ {97		gen.ld64(uint(i), gen.r.Uint64())98	}99	gen.byte(gen.imap["sc"].EncodeParam(map[string]uint{"LEV": lev}, nil))100}...

Encode

Using AI Code Generation

1import (2func main() {3	fmt.Println(stringutil.Reverse("!oG ,olleH"))4}5import (6func main() {7	fmt.Println(my_package.Reverse("!oG ,olleH"))8}9import (10func main() {11	fmt.Println(my_package.Reverse("!oG ,olleH"))12}

Encode

Using AI Code Generation

1import (2type powerpc struct {3}4func (p powerpc) String() string {5	return fmt.Sprintf("PowerPC %s %d", p.model, p.year)6}7func (p powerpc) Encode() string {8	return fmt.Sprintf("%s-%s-%d", p.arch, p.model, p.year)9}10func main() {11	p := powerpc{"PowerPC", "G5", 2003}12	s := p.Encode()13	for _, r := range s {14		z01.PrintRune(r)15	}16	z01.PrintRune('\n')17}18import (19type powerpc struct {20}21func (p powerpc) String() string {22	return fmt.Sprintf("PowerPC %s %d", p.model, p.year)23}24func (p powerpc) Encode() string {25	return fmt.Sprintf("%s-%s-%d", p.arch, p.model, p.year)26}27func main() {28	p := powerpc{"PowerPC", "G5", 2003}29	s := p.Encode()30	for _, r := range s {31		z01.PrintRune(r)32	}33	z01.PrintRune('\n')34}35import (36type powerpc struct {37}38func (p powerpc) String() string {39	return fmt.Sprintf("PowerPC %s %d", p.model, p.year)40}41func (p powerpc) Encode() string {42	return fmt.Sprintf("%s-%s-%d", p.arch, p.model, p.year)43}44func main() {45	p := powerpc{"PowerPC", "G5", 2003}46	s := p.Encode()47	for _, r := range s {48		z01.PrintRune(r)49	}50	z01.PrintRune('\n')51}

Encode

Using AI Code Generation

1import (2func main() {3	p := powerpc.NewPowerPC()4	fmt.Println(p.Encode("Hello World"))5}6import (7func main() {8	p := powerpc.NewPowerPC()9	fmt.Println(p.Decode("Hello World"))10}11import (12type PowerPC struct {13}14func NewPowerPC() *PowerPC {15	return &PowerPC{}16}17func (p *PowerPC) Encode(msg string) string {18	return fmt.Sprintf("Encoded: %s", msg)19}20func (p *PowerPC) Decode(msg string) string {21	return fmt.Sprintf("Decoded: %s", msg)22}

Encode

Using AI Code Generation

1import (2func main() {3	obj := powerpc.Powerpc{}4	obj.Encode()5}6import (7func main() {8	obj := powerpc.Powerpc{}9	obj.Decode()10}11import (12func main() {13	obj := intel.Intel{}14	obj.Encode()15}16import (17func main() {18	obj := intel.Intel{}19	obj.Decode()20}

Encode

Using AI Code Generation

1func main() {2	powerpc := new(Powerpc)3	powerpc.Encode("Hi")4}5type Powerpc struct {6}7func (p *Powerpc) Encode(message string) {8	fmt.Println("Powerpc: " + message)9}10func main() {11	dog := new(Dog)12	dog.Speak()13	cat := new(Cat)14	cat.Speak()15}16type Dog struct {17}18func (d *Dog) Speak() {19	fmt.Println("Dog says woof")20}21type Cat struct {22}23func (c *Cat) Speak() {24	fmt.Println("Cat says meow")25}

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