ADD R2, R2, R1: Adds _____ _____ and places the result in ______ The instruction

Question

ADD R2, R2, R1: Adds _____ _____ and places the result in ______ The instruction is from(ARM/Intel times 86 circle one) The equivalent instruction in (ARM/Intel times 86 circle one) is ____ J some_subroutine:: _____ The instruction is from (ARM/Intel times 86 circle one) The equivalent instruction in (ARM/Intel times 86 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 times 86 circle one) The equivalent instruction in (ARM/Intel times 86 circle one) _____

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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