The University of Alabama in Huntsville

ECE Department

CPE $22101$

Spring $2021$

ARM Basics

Due February $18,2021$

$1\mathrm{.}0(20),2\mathrm{.}0(5),3\mathrm{.}0(15),4\mathrm{.}0(5),5\mathrm{.}0(20),6\mathrm{.}0(15),7\mathrm{.}0(30)$ All assembly language programs must run without errors on the simulator

$1\mathrm{.}0$ For each of the following $8-$bit operations, calculate the values of the $C,Z,V,$ and $N$ flags.

$($a$)1010\_1101+1010\_1101$

$($b$)1111\_1111+0100\_0001$

$($c$)0110\_0100-1110\_1101$

$($d$){0010}_{1111}+{0110}_{1111}$

$($e$)0100\_1000-1110\_1001$

$2\mathrm{.}0$ If R$1=01010011000111100001111000001111$ and R$2=00000000111111111100111100001111,$ what is the value of $R3$ after executing ORR R$3,$ R$1,$ R$2?$

$3\mathrm{.}0$ If $R1=0AC_{89}$ and $R2=8,$ what is the value of $RO$ after each of the following instructions has been executed $($assume that each instruction uses the same data$)?$

$($a$)$ ADD R$0,$ R$1,$ R$1,$ LSL #$4$

$($b$)$ ADD R$0,$ R$1,$ R$1,$ ASR #$8$

$($c$)$ ADD R$0,$ R$1,$ R$1,$ ROR #$7$