Reverse The Values In The Array

The test function accepts two arguments, arr, the start address of an array, and n the size of the array. Reverse all the elements in the array. Thus, if the array contained:

$183100$

the reversed array would contain:

$100381$

Register, r$12,$ can also be used as temporary variable. r$0$ contains the start of arr, r$1$ contains n$.$ No value is returned.

$.$arch armv$4$

$.$syntax unified

$.$arm

$.$text

$.$align $2$

$.$type test, $\%$function

$.$global test

test:

mov r$12,$ r$0$

sub r$2,$r$1,$#$1$

top:

cmp r$12,$ r$2$

bge done

ldr r$3,[$r$0,$ r$12,$ lsl #$2]$

ldr r$4,[$r$0,$ r$2,$ lsl #$2]$

str r$3,[$r$0,$ r$2,$ lsl #$2]$

str r$4,[$r$0,$ r$12,$ lsl #$2]$

add r$12,$ r$12,$ #$1$

sub r$2,$r$2,$ #$1$

b top

done:

mov pc$,$ lr

correct this code of mine $,$ not working

test bench:

#include

#include

static void my$\_$test$($int arr$[],$ int n$)$

$\{$

int i $=0$;

n $=$ n $-1$;

int t$1,$ t$2$;

while $($ i $<$ n $)\{$

t$1=$ arr$[$i$]$;

t$2=$ arr$[$n$]$;

arr$[$i$]=$ t$2$;

arr$[$n$]=$ t$1$;

i$++$;

n$--$;

$\}$

$\}$

extern void test$($int arr$[],$ int n$)$;

int test$\_$harness$($ void $)$

$\{$

int arr$1[20],$ arr$2[20]$;

int res, expected;

for$($ int i $=0$; i $<20$; i$++)\{$

arr$1[$i$]=$ arr$2[$i$]=$ rand$()\%20$;

$\}$

test$($arr$1,8)$;

my$\_$test$($arr$2,8)$;

for$($ int i $=0$; i $<8$; i$++)\{$

res $=$ arr$1[$i$]$;

expected $=$ arr$2[$i$]$;

if $($ res $!=$ expected $)\{$

printf$("$at i$=\%$d expected $\%$d$,$ got $\%$d

$",$ i$,$ expected, res $)$;

return $1$;

$\}$

$\}$

printf$("$passed test$1$

$")$;

for$($ int i $=0$; i $<20$; i$++)\{$

arr$1[$i$]=$ arr$2[$i$]=$ rand$()\%20$;

$\}$

test$($arr$1,17)$;

my$\_$test$($arr$2,17)$;

for$($ int i $=0$; i $<17$; i$++)\{$

res $=$ arr$1[$i$]$;

expected $=$ arr$2[$i$]$;

if $($ res $!=$ expected $)\{$

printf$("$at i$=\%$d expected $\%$d$,$ got $\%$d

$",$ i$,$ expected, res $)$;

return $1$;

$\}$

$\}$

printf$("$passed test$2$

$")$;

return $0$;

$\}$

Recursive Maximum