Question

Write a function (subroutine) that inputs a data value in register r0 and returns value in r0. The function returns y = a + bx + cx2, where a, b, and c are parameters built into the function (i.e., they are not passed to it). The subroutine also performs clipping. If the output is greater than a value d, it is constrained to d (clipped). The input in r0 is a positive binary value in the range 0 to 0xFF. Apart from r0, no other registers may be modified by this subroutine. Write ARM code to implement the following C operation. Int s=0; for ( i = 0; i < 10; i++) { s = s + i*i;}

Name: write a function subroutine that inputs a data value in register r0 and returns value in r0 the function returns y 5 a 1 bx 1 cx2 where a b and c are parameters built into the function ie th 77725
Uploaded: 2023-09-19T05:17:44-08:00
Duration: 4 min 4 s
Channel: Supreeta N
Description: write a function subroutine that inputs a data value in register r0 and returns value in r0 the function returns y 5 a 1 bx 1 cx2 where a b and c are parameters built into the function ie th 77725

          Write a function (subroutine) that inputs a data value in
register r0 and returns value in r0. The function returns y = a +
bx + cx2, where a, b, and c are parameters built into the function
(i.e., they are not passed to it). The subroutine also performs
clipping. If the output is greater than a value d, it is
constrained to d (clipped). The input in r0 is a positive binary
value in the range 0 to 0xFF. Apart from r0, no other registers may
be modified by this subroutine.
Write ARM code to implement the following C operation.
Int  s=0;
for ( i = 0; i < 10; i++) {
s       
=       
s       
+        i*i;}

Added by Sierra G.

Computer Science and Information Technology

Trishna Knowledge Systems 2018 Edition

Instant Answer

Solved by Expert Supreeta N

09/19/2023

Step 1

For the sake of this example, let's assume a = 1, b = 2, c = 3, and d = 0xFF. Second, we need to calculate y = a + b*r0 + c*r0^2. Since we can't modify any register other than r0, we need to use r0 to store intermediate results. Third, we need to perform Show more…

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Write a function (subroutine) that inputs a data value in register r0 and returns value in r0. The function returns y = a + bx + cx2, where a, b, and c are parameters built into the function (i.e., they are not passed to it). The subroutine also performs clipping. If the output is greater than a value d, it is constrained to d (clipped). The input in r0 is a positive binary value in the range 0 to 0xFF. Apart from r0, no other registers may be modified by this subroutine. Write ARM code to implement the following C operation. Int s=0; for ( i = 0; i < 10; i++) { s = s + i*i;}