func parseARM64SystemRegisters()

in cpu/cpu_arm64.go [68:168]
82 lines of code
22 McCabe index (conditional complexity)

func parseARM64SystemRegisters(isar0, isar1, pfr0 uint64) {
	// ID_AA64ISAR0_EL1
	switch extractBits(isar0, 4, 7) {
	case 1:
		ARM64.HasAES = true
	case 2:
		ARM64.HasAES = true
		ARM64.HasPMULL = true
	}

	switch extractBits(isar0, 8, 11) {
	case 1:
		ARM64.HasSHA1 = true
	}

	switch extractBits(isar0, 12, 15) {
	case 1:
		ARM64.HasSHA2 = true
	case 2:
		ARM64.HasSHA2 = true
		ARM64.HasSHA512 = true
	}

	switch extractBits(isar0, 16, 19) {
	case 1:
		ARM64.HasCRC32 = true
	}

	switch extractBits(isar0, 20, 23) {
	case 2:
		ARM64.HasATOMICS = true
	}

	switch extractBits(isar0, 28, 31) {
	case 1:
		ARM64.HasASIMDRDM = true
	}

	switch extractBits(isar0, 32, 35) {
	case 1:
		ARM64.HasSHA3 = true
	}

	switch extractBits(isar0, 36, 39) {
	case 1:
		ARM64.HasSM3 = true
	}

	switch extractBits(isar0, 40, 43) {
	case 1:
		ARM64.HasSM4 = true
	}

	switch extractBits(isar0, 44, 47) {
	case 1:
		ARM64.HasASIMDDP = true
	}

	// ID_AA64ISAR1_EL1
	switch extractBits(isar1, 0, 3) {
	case 1:
		ARM64.HasDCPOP = true
	}

	switch extractBits(isar1, 12, 15) {
	case 1:
		ARM64.HasJSCVT = true
	}

	switch extractBits(isar1, 16, 19) {
	case 1:
		ARM64.HasFCMA = true
	}

	switch extractBits(isar1, 20, 23) {
	case 1:
		ARM64.HasLRCPC = true
	}

	// ID_AA64PFR0_EL1
	switch extractBits(pfr0, 16, 19) {
	case 0:
		ARM64.HasFP = true
	case 1:
		ARM64.HasFP = true
		ARM64.HasFPHP = true
	}

	switch extractBits(pfr0, 20, 23) {
	case 0:
		ARM64.HasASIMD = true
	case 1:
		ARM64.HasASIMD = true
		ARM64.HasASIMDHP = true
	}

	switch extractBits(pfr0, 32, 35) {
	case 1:
		ARM64.HasSVE = true
	}
}