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How to use validate method of prog Package

Best Syzkaller code snippet using prog.validate

obj.go

Source:obj.go

...767		}768	}769	// Validate all instructions - this provides nice error messages.770	for p := cursym.Func.Text; p != nil; p = p.Link {771		encodingForProg(p).validate(p)772	}773}774// signExtend sign extends val starting at bit bit.775func signExtend(val int64, bit uint) int64 {776	return val << (64 - bit) >> (64 - bit)777}778// Split32BitImmediate splits a signed 32-bit immediate into a signed 20-bit779// upper immediate and a signed 12-bit lower immediate to be added to the upper780// result. For example, high may be used in LUI and low in a following ADDI to781// generate a full 32-bit constant.782func Split32BitImmediate(imm int64) (low, high int64, err error) {783	if !immIFits(imm, 32) {784		return 0, 0, fmt.Errorf("immediate does not fit in 32-bits: %d", imm)785	}786	// Nothing special needs to be done if the immediate fits in 12-bits.787	if immIFits(imm, 12) {788		return imm, 0, nil789	}790	high = imm >> 12791	// The bottom 12 bits will be treated as signed.792	//793	// If that will result in a negative 12 bit number, add 1 to794	// our upper bits to adjust for the borrow.795	//796	// It is not possible for this increment to overflow. To797	// overflow, the 20 top bits would be 1, and the sign bit for798	// the low 12 bits would be set, in which case the entire 32799	// bit pattern fits in a 12 bit signed value.800	if imm&(1<<11) != 0 {801		high++802	}803	low = signExtend(imm, 12)804	high = signExtend(high, 20)805	return low, high, nil806}807func regVal(r, min, max int16) uint32 {808	if r < min || r > max {809		panic(fmt.Sprintf("register out of range, want %d < %d < %d", min, r, max))810	}811	return uint32(r - min)812}813// regI returns an integer register.814func regI(r int16) uint32 {815	return regVal(r, REG_X0, REG_X31)816}817// regF returns a float register.818func regF(r int16) uint32 {819	return regVal(r, REG_F0, REG_F31)820}821// regAddr extracts a register from an Addr.822func regAddr(a obj.Addr, min, max int16) uint32 {823	if a.Type != obj.TYPE_REG {824		panic(fmt.Sprintf("ill typed: %+v", a))825	}826	return regVal(a.Reg, min, max)827}828// regIAddr extracts the integer register from an Addr.829func regIAddr(a obj.Addr) uint32 {830	return regAddr(a, REG_X0, REG_X31)831}832// regFAddr extracts the float register from an Addr.833func regFAddr(a obj.Addr) uint32 {834	return regAddr(a, REG_F0, REG_F31)835}836// immIFits reports whether immediate value x fits in nbits bits837// as a signed integer.838func immIFits(x int64, nbits uint) bool {839	nbits--840	var min int64 = -1 << nbits841	var max int64 = 1<<nbits - 1842	return min <= x && x <= max843}844// immUFits reports whether immediate value x fits in nbits bits845// as an unsigned integer.846func immUFits(x int64, nbits uint) bool {847	var max int64 = 1<<nbits - 1848	return 0 <= x && x <= max849}850// immI extracts the signed integer literal of the specified size from an Addr.851func immI(a obj.Addr, nbits uint) uint32 {852	if a.Type != obj.TYPE_CONST {853		panic(fmt.Sprintf("ill typed: %+v", a))854	}855	if !immIFits(a.Offset, nbits) {856		panic(fmt.Sprintf("signed immediate %d in %v cannot fit in %d bits", a.Offset, a, nbits))857	}858	return uint32(a.Offset)859}860// immU extracts the unsigned integer literal of the specified size from an Addr.861func immU(a obj.Addr, nbits uint) uint32 {862	if a.Type != obj.TYPE_CONST {863		panic(fmt.Sprintf("ill typed: %+v", a))864	}865	if !immUFits(a.Offset, nbits) {866		panic(fmt.Sprintf("unsigned immediate %d in %v cannot fit in %d bits", a.Offset, a, nbits))867	}868	return uint32(a.Offset)869}870func wantImmI(p *obj.Prog, pos string, a obj.Addr, nbits uint) {871	if a.Type != obj.TYPE_CONST {872		p.Ctxt.Diag("%v\texpected immediate in %s position but got %s", p, pos, obj.Dconv(p, &a))873		return874	}875	if !immIFits(a.Offset, nbits) {876		p.Ctxt.Diag("%v\tsigned immediate in %s position cannot be larger than %d bits but got %d", p, pos, nbits, a.Offset)877	}878}879func wantImmU(p *obj.Prog, pos string, a obj.Addr, nbits uint) {880	if a.Type != obj.TYPE_CONST {881		p.Ctxt.Diag("%v\texpected immediate in %s position but got %s", p, pos, obj.Dconv(p, &a))882		return883	}884	if !immUFits(a.Offset, nbits) {885		p.Ctxt.Diag("%v\tunsigned immediate in %s position cannot be larger than %d bits but got %d", p, pos, nbits, a.Offset)886	}887}888func wantReg(p *obj.Prog, pos string, descr string, r, min, max int16) {889	if r < min || r > max {890		p.Ctxt.Diag("%v\texpected %s register in %s position but got non-%s register %s", p, descr, pos, descr, regName(int(r)))891	}892}893// wantIntReg checks that r is an integer register.894func wantIntReg(p *obj.Prog, pos string, r int16) {895	wantReg(p, pos, "integer", r, REG_X0, REG_X31)896}897// wantFloatReg checks that r is a floating-point register.898func wantFloatReg(p *obj.Prog, pos string, r int16) {899	wantReg(p, pos, "float", r, REG_F0, REG_F31)900}901func wantRegAddr(p *obj.Prog, pos string, a *obj.Addr, descr string, min int16, max int16) {902	if a == nil {903		p.Ctxt.Diag("%v\texpected register in %s position but got nothing", p, pos)904		return905	}906	if a.Type != obj.TYPE_REG {907		p.Ctxt.Diag("%v\texpected register in %s position but got %s", p, pos, obj.Dconv(p, a))908		return909	}910	if a.Reg < min || a.Reg > max {911		p.Ctxt.Diag("%v\texpected %s register in %s position but got non-%s register %s", p, descr, pos, descr, obj.Dconv(p, a))912	}913}914// wantIntRegAddr checks that a contains an integer register.915func wantIntRegAddr(p *obj.Prog, pos string, a *obj.Addr) {916	wantRegAddr(p, pos, a, "integer", REG_X0, REG_X31)917}918// wantFloatRegAddr checks that a contains a floating-point register.919func wantFloatRegAddr(p *obj.Prog, pos string, a *obj.Addr) {920	wantRegAddr(p, pos, a, "float", REG_F0, REG_F31)921}922// wantEvenJumpOffset checks that the jump offset is a multiple of two.923func wantEvenJumpOffset(p *obj.Prog) {924	if p.To.Offset%1 != 0 {925		p.Ctxt.Diag("%v\tjump offset %v must be even", p, obj.Dconv(p, &p.To))926	}927}928func validateRIII(p *obj.Prog) {929	wantIntRegAddr(p, "from", &p.From)930	wantIntReg(p, "reg", p.Reg)931	wantIntRegAddr(p, "to", &p.To)932}933func validateRFFF(p *obj.Prog) {934	wantFloatRegAddr(p, "from", &p.From)935	wantFloatReg(p, "reg", p.Reg)936	wantFloatRegAddr(p, "to", &p.To)937}938func validateRFFI(p *obj.Prog) {939	wantFloatRegAddr(p, "from", &p.From)940	wantFloatReg(p, "reg", p.Reg)941	wantIntRegAddr(p, "to", &p.To)942}943func validateRFI(p *obj.Prog) {944	wantFloatRegAddr(p, "from", &p.From)945	wantIntRegAddr(p, "to", &p.To)946}947func validateRIF(p *obj.Prog) {948	wantIntRegAddr(p, "from", &p.From)949	wantFloatRegAddr(p, "to", &p.To)950}951func validateRFF(p *obj.Prog) {952	wantFloatRegAddr(p, "from", &p.From)953	wantFloatRegAddr(p, "to", &p.To)954}955func validateII(p *obj.Prog) {956	wantImmI(p, "from", p.From, 12)957	wantIntReg(p, "reg", p.Reg)958	wantIntRegAddr(p, "to", &p.To)959}960func validateIF(p *obj.Prog) {961	wantImmI(p, "from", p.From, 12)962	wantIntReg(p, "reg", p.Reg)963	wantFloatRegAddr(p, "to", &p.To)964}965func validateSI(p *obj.Prog) {966	wantImmI(p, "from", p.From, 12)967	wantIntReg(p, "reg", p.Reg)968	wantIntRegAddr(p, "to", &p.To)969}970func validateSF(p *obj.Prog) {971	wantImmI(p, "from", p.From, 12)972	wantFloatReg(p, "reg", p.Reg)973	wantIntRegAddr(p, "to", &p.To)974}975func validateB(p *obj.Prog) {976	// Offsets are multiples of two, so accept 13 bit immediates for the977	// 12 bit slot. We implicitly drop the least significant bit in encodeB.978	wantEvenJumpOffset(p)979	wantImmI(p, "to", p.To, 13)980	wantIntReg(p, "reg", p.Reg)981	wantIntRegAddr(p, "from", &p.From)982}983func validateU(p *obj.Prog) {984	if p.As == AAUIPC && p.Mark&(NEED_PCREL_ITYPE_RELOC|NEED_PCREL_STYPE_RELOC) != 0 {985		// TODO(sorear): Hack.  The Offset is being used here to temporarily986		// store the relocation addend, not as an actual offset to assemble,987		// so it's OK for it to be out of range.  Is there a more valid way988		// to represent this state?989		return990	}991	wantImmU(p, "from", p.From, 20)992	wantIntRegAddr(p, "to", &p.To)993}994func validateJ(p *obj.Prog) {995	// Offsets are multiples of two, so accept 21 bit immediates for the996	// 20 bit slot. We implicitly drop the least significant bit in encodeJ.997	wantEvenJumpOffset(p)998	wantImmI(p, "to", p.To, 21)999	wantIntRegAddr(p, "from", &p.From)1000}1001func validateRaw(p *obj.Prog) {1002	// Treat the raw value specially as a 32-bit unsigned integer.1003	// Nobody wants to enter negative machine code.1004	a := p.From1005	if a.Type != obj.TYPE_CONST {1006		p.Ctxt.Diag("%v\texpected immediate in raw position but got %s", p, obj.Dconv(p, &a))1007		return1008	}1009	if a.Offset < 0 || 1<<32 <= a.Offset {1010		p.Ctxt.Diag("%v\timmediate in raw position cannot be larger than 32 bits but got %d", p, a.Offset)1011	}1012}1013// encodeR encodes an R-type RISC-V instruction.1014func encodeR(p *obj.Prog, rs1 uint32, rs2 uint32, rd uint32) uint32 {1015	ins := encode(p.As)1016	if ins == nil {1017		panic("encodeR: could not encode instruction")1018	}1019	if ins.rs2 != 0 && rs2 != 0 {1020		panic("encodeR: instruction uses rs2, but rs2 was nonzero")1021	}1022	// Use Scond for the floating-point rounding mode override.1023	// TODO(sorear): Is there a more appropriate way to handle opcode extension bits like this?1024	return ins.funct7<<25 | ins.rs2<<20 | rs2<<20 | rs1<<15 | ins.funct3<<12 | uint32(p.Scond)<<12 | rd<<7 | ins.opcode1025}1026func encodeRIII(p *obj.Prog) uint32 {1027	return encodeR(p, regI(p.Reg), regIAddr(p.From), regIAddr(p.To))1028}1029func encodeRFFF(p *obj.Prog) uint32 {1030	return encodeR(p, regF(p.Reg), regFAddr(p.From), regFAddr(p.To))1031}1032func encodeRFFI(p *obj.Prog) uint32 {1033	return encodeR(p, regF(p.Reg), regFAddr(p.From), regIAddr(p.To))1034}1035func encodeRFI(p *obj.Prog) uint32 {1036	return encodeR(p, regFAddr(p.From), 0, regIAddr(p.To))1037}1038func encodeRIF(p *obj.Prog) uint32 {1039	return encodeR(p, regIAddr(p.From), 0, regFAddr(p.To))1040}1041func encodeRFF(p *obj.Prog) uint32 {1042	return encodeR(p, regFAddr(p.From), 0, regFAddr(p.To))1043}1044// encodeI encodes an I-type RISC-V instruction.1045func encodeI(p *obj.Prog, rd uint32) uint32 {1046	imm := immI(p.From, 12)1047	rs1 := regI(p.Reg)1048	ins := encode(p.As)1049	if ins == nil {1050		panic("encodeI: could not encode instruction")1051	}1052	imm |= uint32(ins.csr)1053	return imm<<20 | rs1<<15 | ins.funct3<<12 | rd<<7 | ins.opcode1054}1055func encodeII(p *obj.Prog) uint32 {1056	return encodeI(p, regIAddr(p.To))1057}1058func encodeIF(p *obj.Prog) uint32 {1059	return encodeI(p, regFAddr(p.To))1060}1061// encodeS encodes an S-type RISC-V instruction.1062func encodeS(p *obj.Prog, rs2 uint32) uint32 {1063	imm := immI(p.From, 12)1064	rs1 := regIAddr(p.To)1065	ins := encode(p.As)1066	if ins == nil {1067		panic("encodeS: could not encode instruction")1068	}1069	return (imm>>5)<<25 | rs2<<20 | rs1<<15 | ins.funct3<<12 | (imm&0x1f)<<7 | ins.opcode1070}1071func encodeSI(p *obj.Prog) uint32 {1072	return encodeS(p, regI(p.Reg))1073}1074func encodeSF(p *obj.Prog) uint32 {1075	return encodeS(p, regF(p.Reg))1076}1077// encodeB encodes a B-type RISC-V instruction.1078func encodeB(p *obj.Prog) uint32 {1079	imm := immI(p.To, 13)1080	rs2 := regI(p.Reg)1081	rs1 := regIAddr(p.From)1082	ins := encode(p.As)1083	if ins == nil {1084		panic("encodeB: could not encode instruction")1085	}1086	return (imm>>12)<<31 | ((imm>>5)&0x3f)<<25 | rs2<<20 | rs1<<15 | ins.funct3<<12 | ((imm>>1)&0xf)<<8 | ((imm>>11)&0x1)<<7 | ins.opcode1087}1088// encodeU encodes a U-type RISC-V instruction.1089func encodeU(p *obj.Prog) uint32 {1090	// The immediates for encodeU are the upper 20 bits of a 32 bit value.1091	// Rather than have the user/compiler generate a 32 bit constant, the1092	// bottommost bits of which must all be zero, instead accept just the1093	// top bits.1094	imm := immU(p.From, 20)1095	rd := regIAddr(p.To)1096	ins := encode(p.As)1097	if ins == nil {1098		panic("encodeU: could not encode instruction")1099	}1100	return imm<<12 | rd<<7 | ins.opcode1101}1102// encodeJ encodes a J-type RISC-V instruction.1103func encodeJ(p *obj.Prog) uint32 {1104	imm := immI(p.To, 21)1105	rd := regIAddr(p.From)1106	ins := encode(p.As)1107	if ins == nil {1108		panic("encodeJ: could not encode instruction")1109	}1110	return (imm>>20)<<31 | ((imm>>1)&0x3ff)<<21 | ((imm>>11)&0x1)<<20 | ((imm>>12)&0xff)<<12 | rd<<7 | ins.opcode1111}1112// encodeRaw encodes a raw instruction value.1113func encodeRaw(p *obj.Prog) uint32 {1114	// Treat the raw value specially as a 32-bit unsigned integer.1115	// Nobody wants to enter negative machine code.1116	a := p.From1117	if a.Type != obj.TYPE_CONST {1118		panic(fmt.Sprintf("ill typed: %+v", a))1119	}1120	if a.Offset < 0 || 1<<32 <= a.Offset {1121		panic(fmt.Sprintf("immediate %d in %v cannot fit in 32 bits", a.Offset, a))1122	}1123	return uint32(a.Offset)1124}1125func EncodeIImmediate(imm int64) (int64, error) {1126	if !immIFits(imm, 12) {1127		return 0, fmt.Errorf("immediate %#x does not fit in 12 bits", imm)1128	}1129	return imm << 20, nil1130}1131func EncodeSImmediate(imm int64) (int64, error) {1132	if !immIFits(imm, 12) {1133		return 0, fmt.Errorf("immediate %#x does not fit in 12 bits", imm)1134	}1135	return ((imm >> 5) << 25) | ((imm & 0x1f) << 7), nil1136}1137func EncodeUImmediate(imm int64) (int64, error) {1138	if !immUFits(imm, 20) {1139		return 0, fmt.Errorf("immediate %#x does not fit in 20 bits", imm)1140	}1141	return imm << 12, nil1142}1143type encoding struct {1144	encode   func(*obj.Prog) uint32 // encode returns the machine code for an *obj.Prog1145	validate func(*obj.Prog)        // validate validates an *obj.Prog, calling ctxt.Diag for any issues1146	length   int                    // length of encoded instruction; 0 for pseudo-ops, 4 otherwise1147}1148var (1149	// Encodings have the following naming convention:1150	//1151	//  1. the instruction encoding (R/I/S/B/U/J), in lowercase1152	//  2. zero or more register operand identifiers (I = integer1153	//     register, F = float register), in uppercase1154	//  3. the word "Encoding"1155	//1156	// For example, rIIIEncoding indicates an R-type instruction with two1157	// integer register inputs and an integer register output; sFEncoding1158	// indicates an S-type instruction with rs2 being a float register.1159	rIIIEncoding = encoding{encode: encodeRIII, validate: validateRIII, length: 4}1160	rFFFEncoding = encoding{encode: encodeRFFF, validate: validateRFFF, length: 4}1161	rFFIEncoding = encoding{encode: encodeRFFI, validate: validateRFFI, length: 4}1162	rFIEncoding  = encoding{encode: encodeRFI, validate: validateRFI, length: 4}1163	rIFEncoding  = encoding{encode: encodeRIF, validate: validateRIF, length: 4}1164	rFFEncoding  = encoding{encode: encodeRFF, validate: validateRFF, length: 4}1165	iIEncoding = encoding{encode: encodeII, validate: validateII, length: 4}1166	iFEncoding = encoding{encode: encodeIF, validate: validateIF, length: 4}1167	sIEncoding = encoding{encode: encodeSI, validate: validateSI, length: 4}1168	sFEncoding = encoding{encode: encodeSF, validate: validateSF, length: 4}1169	bEncoding = encoding{encode: encodeB, validate: validateB, length: 4}1170	uEncoding = encoding{encode: encodeU, validate: validateU, length: 4}1171	jEncoding = encoding{encode: encodeJ, validate: validateJ, length: 4}1172	// rawEncoding encodes a raw instruction byte sequence.1173	rawEncoding = encoding{encode: encodeRaw, validate: validateRaw, length: 4}1174	// pseudoOpEncoding panics if encoding is attempted, but does no validation.1175	pseudoOpEncoding = encoding{encode: nil, validate: func(*obj.Prog) {}, length: 0}1176	// badEncoding is used when an invalid op is encountered.1177	// An error has already been generated, so let anything else through.1178	badEncoding = encoding{encode: func(*obj.Prog) uint32 { return 0 }, validate: func(*obj.Prog) {}, length: 0}1179)1180// encodingForAs contains the encoding for a RISC-V instruction.1181// Instructions are masked with obj.AMask to keep indices small.1182var encodingForAs = [ALAST & obj.AMask]encoding{1183	// Unprivileged ISA1184	// 2.4: Integer Computational Instructions1185	AADDI & obj.AMask:  iIEncoding,1186	ASLTI & obj.AMask:  iIEncoding,1187	ASLTIU & obj.AMask: iIEncoding,1188	AANDI & obj.AMask:  iIEncoding,1189	AORI & obj.AMask:   iIEncoding,1190	AXORI & obj.AMask:  iIEncoding,1191	ASLLI & obj.AMask:  iIEncoding,1192	ASRLI & obj.AMask:  iIEncoding,1193	ASRAI & obj.AMask:  iIEncoding,1194	ALUI & obj.AMask:   uEncoding,1195	AAUIPC & obj.AMask: uEncoding,1196	AADD & obj.AMask:   rIIIEncoding,1197	ASLT & obj.AMask:   rIIIEncoding,1198	ASLTU & obj.AMask:  rIIIEncoding,1199	AAND & obj.AMask:   rIIIEncoding,1200	AOR & obj.AMask:    rIIIEncoding,1201	AXOR & obj.AMask:   rIIIEncoding,1202	ASLL & obj.AMask:   rIIIEncoding,1203	ASRL & obj.AMask:   rIIIEncoding,1204	ASUB & obj.AMask:   rIIIEncoding,1205	ASRA & obj.AMask:   rIIIEncoding,1206	// 2.5: Control Transfer Instructions1207	AJAL & obj.AMask:  jEncoding,1208	AJALR & obj.AMask: iIEncoding,1209	ABEQ & obj.AMask:  bEncoding,1210	ABNE & obj.AMask:  bEncoding,1211	ABLT & obj.AMask:  bEncoding,1212	ABLTU & obj.AMask: bEncoding,1213	ABGE & obj.AMask:  bEncoding,1214	ABGEU & obj.AMask: bEncoding,1215	// 2.6: Load and Store Instructions1216	ALW & obj.AMask:  iIEncoding,1217	ALWU & obj.AMask: iIEncoding,1218	ALH & obj.AMask:  iIEncoding,1219	ALHU & obj.AMask: iIEncoding,1220	ALB & obj.AMask:  iIEncoding,1221	ALBU & obj.AMask: iIEncoding,1222	ASW & obj.AMask:  sIEncoding,1223	ASH & obj.AMask:  sIEncoding,1224	ASB & obj.AMask:  sIEncoding,1225	// 5.2: Integer Computational Instructions (RV64I)1226	AADDIW & obj.AMask: iIEncoding,1227	ASLLIW & obj.AMask: iIEncoding,1228	ASRLIW & obj.AMask: iIEncoding,1229	ASRAIW & obj.AMask: iIEncoding,1230	AADDW & obj.AMask:  rIIIEncoding,1231	ASLLW & obj.AMask:  rIIIEncoding,1232	ASRLW & obj.AMask:  rIIIEncoding,1233	ASUBW & obj.AMask:  rIIIEncoding,1234	ASRAW & obj.AMask:  rIIIEncoding,1235	// 5.3: Load and Store Instructions (RV64I)1236	ALD & obj.AMask: iIEncoding,1237	ASD & obj.AMask: sIEncoding,1238	// 7.1: Multiplication Operations1239	AMUL & obj.AMask:    rIIIEncoding,1240	AMULH & obj.AMask:   rIIIEncoding,1241	AMULHU & obj.AMask:  rIIIEncoding,1242	AMULHSU & obj.AMask: rIIIEncoding,1243	AMULW & obj.AMask:   rIIIEncoding,1244	ADIV & obj.AMask:    rIIIEncoding,1245	ADIVU & obj.AMask:   rIIIEncoding,1246	AREM & obj.AMask:    rIIIEncoding,1247	AREMU & obj.AMask:   rIIIEncoding,1248	ADIVW & obj.AMask:   rIIIEncoding,1249	ADIVUW & obj.AMask:  rIIIEncoding,1250	AREMW & obj.AMask:   rIIIEncoding,1251	AREMUW & obj.AMask:  rIIIEncoding,1252	// 10.1: Base Counters and Timers1253	ARDCYCLE & obj.AMask:   iIEncoding,1254	ARDTIME & obj.AMask:    iIEncoding,1255	ARDINSTRET & obj.AMask: iIEncoding,1256	// 11.5: Single-Precision Load and Store Instructions1257	AFLW & obj.AMask: iFEncoding,1258	AFSW & obj.AMask: sFEncoding,1259	// 11.6: Single-Precision Floating-Point Computational Instructions1260	AFADDS & obj.AMask:  rFFFEncoding,1261	AFSUBS & obj.AMask:  rFFFEncoding,1262	AFMULS & obj.AMask:  rFFFEncoding,1263	AFDIVS & obj.AMask:  rFFFEncoding,1264	AFMINS & obj.AMask:  rFFFEncoding,1265	AFMAXS & obj.AMask:  rFFFEncoding,1266	AFSQRTS & obj.AMask: rFFFEncoding,1267	// 11.7: Single-Precision Floating-Point Conversion and Move Instructions1268	AFCVTWS & obj.AMask:  rFIEncoding,1269	AFCVTLS & obj.AMask:  rFIEncoding,1270	AFCVTSW & obj.AMask:  rIFEncoding,1271	AFCVTSL & obj.AMask:  rIFEncoding,1272	AFCVTWUS & obj.AMask: rFIEncoding,1273	AFCVTLUS & obj.AMask: rFIEncoding,1274	AFCVTSWU & obj.AMask: rIFEncoding,1275	AFCVTSLU & obj.AMask: rIFEncoding,1276	AFSGNJS & obj.AMask:  rFFFEncoding,1277	AFSGNJNS & obj.AMask: rFFFEncoding,1278	AFSGNJXS & obj.AMask: rFFFEncoding,1279	AFMVXS & obj.AMask:   rFIEncoding,1280	AFMVSX & obj.AMask:   rIFEncoding,1281	AFMVXW & obj.AMask:   rFIEncoding,1282	AFMVWX & obj.AMask:   rIFEncoding,1283	// 11.8: Single-Precision Floating-Point Compare Instructions1284	AFEQS & obj.AMask: rFFIEncoding,1285	AFLTS & obj.AMask: rFFIEncoding,1286	AFLES & obj.AMask: rFFIEncoding,1287	// 12.3: Double-Precision Load and Store Instructions1288	AFLD & obj.AMask: iFEncoding,1289	AFSD & obj.AMask: sFEncoding,1290	// 12.4: Double-Precision Floating-Point Computational Instructions1291	AFADDD & obj.AMask:  rFFFEncoding,1292	AFSUBD & obj.AMask:  rFFFEncoding,1293	AFMULD & obj.AMask:  rFFFEncoding,1294	AFDIVD & obj.AMask:  rFFFEncoding,1295	AFMIND & obj.AMask:  rFFFEncoding,1296	AFMAXD & obj.AMask:  rFFFEncoding,1297	AFSQRTD & obj.AMask: rFFFEncoding,1298	// 12.5: Double-Precision Floating-Point Conversion and Move Instructions1299	AFCVTWD & obj.AMask:  rFIEncoding,1300	AFCVTLD & obj.AMask:  rFIEncoding,1301	AFCVTDW & obj.AMask:  rIFEncoding,1302	AFCVTDL & obj.AMask:  rIFEncoding,1303	AFCVTWUD & obj.AMask: rFIEncoding,1304	AFCVTLUD & obj.AMask: rFIEncoding,1305	AFCVTDWU & obj.AMask: rIFEncoding,1306	AFCVTDLU & obj.AMask: rIFEncoding,1307	AFCVTSD & obj.AMask:  rFFEncoding,1308	AFCVTDS & obj.AMask:  rFFEncoding,1309	AFSGNJD & obj.AMask:  rFFFEncoding,1310	AFSGNJND & obj.AMask: rFFFEncoding,1311	AFSGNJXD & obj.AMask: rFFFEncoding,1312	AFMVXD & obj.AMask:   rFIEncoding,1313	AFMVDX & obj.AMask:   rIFEncoding,1314	// 12.6: Double-Precision Floating-Point Compare Instructions1315	AFEQD & obj.AMask: rFFIEncoding,1316	AFLTD & obj.AMask: rFFIEncoding,1317	AFLED & obj.AMask: rFFIEncoding,1318	// Privileged ISA1319	// 3.2.1: Environment Call and Breakpoint1320	AECALL & obj.AMask:  iIEncoding,1321	AEBREAK & obj.AMask: iIEncoding,1322	// Escape hatch1323	AWORD & obj.AMask: rawEncoding,1324	// Pseudo-operations1325	obj.AFUNCDATA: pseudoOpEncoding,1326	obj.APCDATA:   pseudoOpEncoding,1327	obj.ATEXT:     pseudoOpEncoding,1328	obj.ANOP:      pseudoOpEncoding,1329}1330// encodingForProg returns the encoding (encode+validate funcs) for an *obj.Prog.1331func encodingForProg(p *obj.Prog) encoding {1332	if base := p.As &^ obj.AMask; base != obj.ABaseRISCV && base != 0 {1333		p.Ctxt.Diag("encodingForProg: not a RISC-V instruction %s", p.As)1334		return badEncoding1335	}1336	as := p.As & obj.AMask1337	if int(as) >= len(encodingForAs) {1338		p.Ctxt.Diag("encodingForProg: bad RISC-V instruction %s", p.As)1339		return badEncoding1340	}1341	enc := encodingForAs[as]1342	if enc.validate == nil {1343		p.Ctxt.Diag("encodingForProg: no encoding for instruction %s", p.As)1344		return badEncoding1345	}1346	return enc1347}1348// assemble emits machine code.1349// It is called at the very end of the assembly process.1350func assemble(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) {1351	var symcode []uint321352	for p := cursym.Func.Text; p != nil; p = p.Link {1353		switch p.As {1354		case AJALR:1355			if p.To.Sym != nil {1356				// This is a CALL/JMP. We add a relocation only...

programmer.go

Source:programmer.go

...18	jwt "github.com/form3tech-oss/jwt-go"19)20type Programmer struct {21	Id int `json:"id"`22	Name string `json:"name" validate:"required"`23	Email string `json:"email" validate:"required,email"`24	Password string `json:"password,omitempty"`25	Role string `json:"role" validate:"required"`26}27func (prog Programmer) ValidateStruct() map[string]string {28    validate := validator.New()29    err := validate.Struct(prog)30    if err != nil {31    	return utils.ParseValidator(err.(validator.ValidationErrors))32    }33    return nil34}35func GetProgrammer(c *fiber.Ctx) error {36	conn, err := pgx.Connect(context.Background(), os.Getenv("DATABASE_URL"))37	if err != nil {38		fmt.Println(err.Error())39		return fiber.NewError(500, "Cannot connect to the database!")40	}41	defer conn.Close(context.Background());42	rows, err := conn.Query(context.Background(), "select id, name, email, role from programmer where id <> 1")43	if err != nil {...

validate

Using AI Code Generation

1import (2func main() {3 fmt.Println("Enter a number")4 fmt.Scan(&a)5 prog.Validate(a)6}

validate

Using AI Code Generation

1import "fmt"2func main() {3        p := prog{val: 10}4        p.validate()5}6import "fmt"7func main() {8        p := prog{val: 10}9        p.validate()10}11import "fmt"12func main() {13        p := prog{val: 10}14        p.validate()15}16import "fmt"17func main() {18        p := prog{val: 10}19        p.validate()20}21import "fmt"22func main() {23        p := prog{val: 10}24        p.validate()25}26import "fmt"27func main() {28        p := prog{val: 10}29        p.validate()30}31import "fmt"32func main() {33        p := prog{val: 10}34        p.validate()35}36import "fmt"37func main() {38        p := prog{val: 10}39        p.validate()40}41import "fmt"42func main() {43        p := prog{val: 10}44        p.validate()45}46import "fmt"47func main() {48        p := prog{val: 10}49        p.validate()50}51import "fmt"52func main() {53        p := prog{val: 10}54        p.validate()55}56import "fmt"57func main() {58        p := prog{val: 10}59        p.validate()

validate

Using AI Code Generation

1import (2func main() {3	fmt.Println("Enter the number to be validated")4	fmt.Scanln(&num)5	if prog.Validate(num) {6		fmt.Println("The number is valid")7	} else {8		fmt.Println("The number is invalid")9	}10}

validate

Using AI Code Generation

1import (2func main() {3 fmt.Println("Enter a number")4 fmt.Scanf("%d", &a)5 prog := Prog{a}6 prog.Validate()7}

validate

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World!")4	prog.Validate()5}6import "fmt"7func Validate() {8	fmt.Println("I am in prog class")9}10The import path is the location of the package in the repository. For example, the import path for the fmt package is fmt. The

validate

Using AI Code Generation

1import "fmt"2import "path/to/Prog"3func main() {4    p := Prog.Prog{}5    if p.Validate() {6        fmt.Println("The program is valid")7    } else {8        fmt.Println("The program is invalid")9    }10}

validate

Using AI Code Generation

1import (2func main() {3    fmt.Println(prog.Validate("sdf"))4}5func Validate(str string) bool {6}7import (8func main() {9    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {10        fmt.Fprintf(w, "Hello, you've requested: %s11    })12    http.ListenAndServe(":8080", nil)13}14import (15func main() {16    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {17        fmt.Fprintf(w, "Hello, you've requested: %s18    })19    http.ListenAndServe(":8080", nil)20}

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.