Spoz you have the following instructions below. Explain what the instruction is

Question

Spoz you have the following instructions below. Explain what the instruction is performing, as well as determining if the instruction is from an ARM assembly program, or from an Intel assembly program. Explain why and what the comparable command would be for the other processor (if the instruction given for Intel, provide the comparable ARM instruction). Note that each instruction is separate from any other instructions in this problem. a. ADD R2, R2, R1: Adds ______ and places the result in ______ The instruction is from (ARM/Intel x86 circle one) The equivalent instruction in (ARM/Intel x86 circle one) is ______ J some_subroutine:: ______ The instruction is from (ARM/Intel x86 circle one) The equivalent instruction in (ARM/Intel x86 circle one) is ______ CMP R0, 0: Compares ______ to ______ and places the result in (AX/R4/BX/R0/nothing since the result is discarded circle one). The instruction is from (ARM/Intel x86 circle one) The equivalent instruction in (ARM/Intel x86 circle one) is ______

Explanation / Answer

Adds R1 and R2

and places result in R2

ARM instruction

Equivalent Intel instruction- ADD destinationOperand, sourceOperand and performs destination=destination+source

some_subroutine is from Intel x86 which is used for calling functions.

The equivalent instruction in ARM is BL destination (branch and link) where destination is usually the label on the first instruction of the subroutine.

CMP R0, 0 compares the R0 value to 0 and the result is placed in nothing as it is discarded.

The instruction is from Intel x86.

The equivalent ARM instruction is CMP Rn, operand2 (Flags set to result of (Rn Operand2))

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