Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

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}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.