Question $1-2$:

Please provide the assembly code for the C$-$based array multiplication using the RV$64$I ISA. Your assembly code should be integrated into the arraymul$\_$baseline.c file within the arraymul$\_$baseline$()$ function in exercise $1-2.$c$.$ Specifically, you are tasked with writing assembly code for the for$-$loop section where each element y$[$i$]$ is calculated as h$[$i$]*$ x$[$i$]+$ c$.$

The header file arraymul.h specifies the constants$/$variables used in this assignment. You can adjust the arr$\_$size variable in arraymul.h to meet the exercise requirements, but please refrain from modifying the rest of the header file.

Variables$/$Constants defined in the header files used in this exercise:

x$[]$: Input array $1$

h$[]$: Input array $2$

y$[]$: Output array

arraymul$\_$baseline$\_$cycle$\_$count: Clock cycle count in arraymul$\_$baseline.c $($you need to calculate this$)$

cycle$\_$time: Given clock cycle time of the target RISC$-$V processor running at $2\mathrm{.}6$ GHz

arraymul$\_$baseline$\_$cpu$\_$time: CPU time in arraymul$\_$baseline.c $($you need to calculate this$)$

arr$\_$size: Size of the array

Your obtained scores for this exercise are determined by the correctness of your reported performance data and statistics.

The values of seven counters:

add$\_$cnt: Add counter

sub$\_$cnt: Subtract counter

mul$\_$cnt: Multiply counter

div$\_$cnt: Divide counter

lw$\_$cnt: Load counter

sw$\_$cnt: Store counter

others$\_$cnt: Other operations counter

The total cycle count $($arraymul$\_$baseline$\_$cycle$\_$count$).$

The CPU time $($arraymul$\_$baseline$\_$cpu$\_$time$).$

Choose any arr$\_$size, but log$2($arr$\_$size$)$ must be an integer and answer the question: Is this program CPU$-$bound or Memory$-$bound?

The arraymul$\_$baseline$()$ function in exercise $1-2.$c is provided below:

void arraymul$\_$baseline$()\{$

short int $*$p$\_$h $=$ h;

short int $*$p$\_$x $=$ x;

short int $*$p$\_$y $=$ y;

short int id $=$ student$\_$id;

asm volatile$($

#include "arraymul$\_$baseline.c$"$

: $[$h$]"+$r$"($p$\_$h$),$

$[$x$]"+$r$"($p$\_$x$),$

$[$y$]"+$r$"($p$\_$y$),$

$[$add$\_$cnt$]"+$r$"($add$\_$cnt$),$

$[$sub$\_$cnt$]"+$r$"($sub$\_$cnt$),$

$[$mul$\_$cnt$]"+$r$"($mul$\_$cnt$),$

$[$div$\_$cnt$]"+$r$"($div$\_$cnt$),$

$[$lw$\_$cnt$]"+$r$"($lw$\_$cnt$),$

$[$sw$\_$cnt$]"+$r$"($sw$\_$cnt$),$

$[$others$\_$cnt$]"+$r$"($others$\_$cnt$)$

: $[$id$]"$r$"($id$),$

$[$arr$\_$size$]"$r$"($arr$\_$size$)$

: $"$t$0","$t$1"$

$)$;

printf$("====$ Question $1-2====$

$")$;

printf$("$output: $")$;

for $($int i $=0$; i $<$ arr$\_$size; i$++)\{$

printf$("\%$d $",$ y$[$i$])$;

$\}$

printf$("$

$")$;

printf$("$add counter used: $\%$d

$",$ add$\_$cnt$)$;

printf$("$sub counter used: $\%$d

$",$ sub$\_$cnt$)$;

printf$("$mul counter used: $\%$d

$",$ mul$\_$cnt$)$;

printf$("$div counter used: $\%$d

$",$ div$\_$cnt$)$;

printf$("$lw counter used: $\%$d

$",$ lw$\_$cnt$)$;

printf$("$sw counter used: $\%$d

$",$ sw$\_$cnt$)$;

printf$("$others counter used: $\%$d

$",$ others$\_$cnt$)$;

macro$\_$arraymul$\_$baseline$\_$cycle$\_$count printf$("$The total cycle count in this program: $\%\mathrm{.}0$f

$",$ arraymul$\_$baseline$\_$cycle$\_$count$)$;

macro$\_$arraymul$\_$baseline$\_$cpu$\_$time printf$("$CPU time $=\%\mathrm{.}2$f us

$",$ arraymul$\_$baseline$\_$cpu$\_$time$)$;

macro$\_$calc$\_$arraymul$\_$baseline$\_$ratio if $($arraymul$\_$baseline$\_$ratio $>0\mathrm{.}5)$

printf$("$This program is a CPU bound task.

$")$;

else

printf$("$This program is a Memory bound task.

$")$;

$//$ Record the CPU time

FILE $*$fp;

fp $=$ fopen$("$arraymul$\_$baseline$\_$cpu$\_$time.txt$","$w$")$;

fprintf$($fp$,"\%\mathrm{.}2$f$",$ arraymul$\_$baseline$\_$cpu$\_$time$)$;

fclose$($fp$)$;

$\}$