extern "C" int f(int *,int,int); int a[2][2] = {{11,12},{21,22}}; void setup() {   Serial.begin(115200);   while(!Serial);   delay(500);     int *arr = (int*)a;    Serial.println(f(arr,2,2)); } void loop() { } .global f f:  ldr r3,[r0] // get first element mov r2,#0 add r2,r3 mov r1, #3 lp: add r0,#4 // add next element ldr r3,[r0] add r2,r3 sub r1,#1 bgt lp mov r0,r2  bx lr Describe what operation is being performed in this code

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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extern "C" int f(int *,int,int);

int a[2][2] = {{11,12},{21,22}};

void setup()
{
  Serial.begin(115200);
  while(!Serial);
  delay(500);
 
  int *arr = (int*)a;
   Serial.println(f(arr,2,2));

}

void loop()
{

}

.global f

f:
 ldr r3,[r0] // get first element

mov r2,#0
add r2,r3

mov r1, #3

lp:

add r0,#4 // add next element
ldr r3,[r0]
add r2,r3
sub r1,#1

bgt lp


mov r0,r2

 bx lr

Describe what operation is being performed in this code

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