encode_arm64.s [200:209]:
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	// If those 8 bytes were not equal, XOR the two 8 byte values, and return
	// the index of the first byte that differs.
	// RBIT reverses the bit order, then CLZ counts the leading zeros, the
	// combination of which finds the least significant bit which is set.
	// The arm64 architecture is little-endian, and the shift by 3 converts
	// a bit index to a byte index.
	EOR  R3, R4, R4
	RBIT R4, R4
	CLZ  R4, R4
	ADD  R4>>3, R7, R7
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encode_arm64.s [534:543]:
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	// If those 8 bytes were not equal, XOR the two 8 byte values, and return
	// the index of the first byte that differs.
	// RBIT reverses the bit order, then CLZ counts the leading zeros, the
	// combination of which finds the least significant bit which is set.
	// The arm64 architecture is little-endian, and the shift by 3 converts
	// a bit index to a byte index.
	EOR  R3, R4, R4
	RBIT R4, R4
	CLZ  R4, R4
	ADD  R4>>3, R7, R7
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