// get Processor Feature Register 0 into x0
	// mrs x0, ID_AA64PFR0_EL1 = d5380400
	WORD	$0xd5380400
	MOVD	R0, ret+0(FP)
	RET

// func getzfr0() uint64
TEXT ·getzfr0(SB),NOSPLIT,$0-8
	// get SVE Feature Register 0 into x0
	// mrs	x0, ID_AA64ZFR0_EL1 = d5380480
	WORD $0xd5380480
	MOVD	R0, ret+0(FP)

		{Name: "sha2", Feature: &ARM64.HasSHA2},
		{Name: "sha3", Feature: &ARM64.HasSHA3},
		{Name: "sha512", Feature: &ARM64.HasSHA512},
		{Name: "sm3", Feature: &ARM64.HasSM3},
		{Name: "sm4", Feature: &ARM64.HasSM4},
		{Name: "sve", Feature: &ARM64.HasSVE},
		{Name: "sve2", Feature: &ARM64.HasSVE2},
		{Name: "crc32", Feature: &ARM64.HasCRC32},
		{Name: "atomics", Feature: &ARM64.HasATOMICS},
		{Name: "asimdhp", Feature: &ARM64.HasASIMDHP},