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
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
Section: Chapter Questions
Problem 1PE
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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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