AArch64: "mov x0, #0x123400000000" vs "movz x0, #0x1234, lsl #32"

[JonathanSalwan]

Hey,

With capstone 4.0.2, the opcode \x80\x46\xc2\xd2 is disassembled as movz x0, #0x1234, lsl #32 while with Capstone 5 it's disassembled with mov x0, #0x123400000000. I agree that it's the same thing but we lost information with Capstone 5 like shift information, see below:

With Capstone 4.0.2:

$ cstool -d arm64 \x80\x46\xc2\xd2
 0  80 46 c2 d2  movz	x0, #0x1234, lsl #32
	ID: 191 (movz)
	op_count: 2
		operands[0].type: REG = x0
		operands[0].access: READ | WRITE
		operands[1].type: IMM = 0x1234
		operands[1].access: READ
			Shift: type = 1, value = 32      <--- this information is lost with capstone 5
	Registers read: x0
	Registers modified: x0

With Capstone 5.0

$ cstool -d arm64 \x80\x46\xc2\xd2
 0  80 46 c2 d2  mov	x0, #0x123400000000
	ID: 488 (mov)
	op_count: 2
		operands[0].type: REG = x0
		operands[0].access: READ | WRITE
		operands[1].type: IMM = 0x123400000000
	Registers read: x0
	Registers modified: x0

Is there a specific reason for this move except a better readability?

[Rot127]

Is closes with #2026. Shift info can be retrieved with -r option.