ASSEMBLY LANGUAGE PROGRAMMING Given arrays A and B, of byte values below: Matrix

Question

ASSEMBLY LANGUAGE PROGRAMMING

Given arrays A and B, of byte values below:

Matrix A:

Matrix B =

1. Initialize Matrix A & B at the specified memory address.

2. Initialize Matrix C (same dimension) with all zero's at location 0x1300.

3. Compute C = A + B. (The result should be stored at location 0x1300).

For submission, include the followings:

- Screen shot of data memory showing contents of matrices A, B, and C.

- Source file (.s)

Address   Value 0x1000 2 0x1001 14 0x1002 26 0x1003 38 ASSEMBLY LANGUAGE PROGRAMMING Given arrays A and B, of byte values below: Matrix A: Address Ox1000 Ox1001 0x1002 0x1003 Value 2 14 26 38 Matrix B- Value Address Ox1061 0x1062 Ox1063 0x1064 13 25 37 1. Initialize Matrix A & B at the specified memory address. 2. Initialize Matrix C (same dimension) with all zero's at location 0x1300. 3. Compute C = A + B. (The result should be stored at location 0x1300) For submission, include the followings: Screen shot of data memory showing contents of matrices A, B, and C. Source file (s)

Explanation / Answer

.extern printf
.extern scanf
.global main

.text

main:
push {ip, lr}

@--read lines and columns of matrix A
ldr r0, =scanf2
ldr r1, =linesA
ldr r2, =columnsA
bl scanf

@--read all values of matrix A
ldr r4, =linesA
ldr r4, [r4]
ldr r5, =columnsA
ldr r5, [r5]
mul r6, r4, r5
ldr r7, =matrixA
loop1:
cmp r6, #0
ble endloop1
ldr r0, =scanf1
mov r1, r7
bl scanf
sub r6, r6, #1
add r7, r7, #4
b loop1
endloop1:

@--read lines and columns of matrix B
ldr r0, =scanf2
ldr r1, =linesB
ldr r2, =columnsB
bl scanf

@--check if matrices are compatible
ldr r6, = linesB
ldr r6, [r6]
ldr r7, = columnsB
ldr r7, [r7]
cmp r5, r6
bne abort
  
@--read all values of matrix B
ldr r4, =linesB
ldr r4, [r4]
ldr r5, =columnsB
ldr r5, [r5]
mul r6, r4, r5
ldr r7, =matrixB
loop2:
cmp r6, #0
ble endloop2
ldr r0, =scanf1
mov r1, r7
bl scanf
sub r6, r6, #1
add r7, r7, #4
b loop2
endloop2:
  
@--load all the necessary numbers on registers r4-r9
ldr r4, =matrixA
ldr r5, =linesA
ldr r5, [r5]
ldr r6, =columnsA
ldr r6, [r6]
ldr r7, =matrixB
ldr r8, =linesB
ldr r8, [r8]
ldr r9, =columnsB
ldr r9, [r9]

@--perform calculations and output result
mov r0, #0
forLinesA:
cmp r0, r5
bge endForLinesA
mov r1, #0
forColumnsB:
cmp r1, r9
bge endForColumnsB
mov r2, #0
mov r3, #0
multiply:
mov r12, #4
cmp r3, r6
bge endMultiply
@--load first element, from matrixA
mul r10, r0, r6
add r10, r10, r3
mul r11, r10, r12
add r11, r11, r4
ldr r10, [r11]
@--load second elements, from matrixB
mul r11, r9, r3
add r11, r11, r1
push {r0}
mul r0, r11, r12
add r0, r0, r7
ldr r11, [r0]
pop {r0}
@--multiply and add to result variable
mul r12, r10, r11
add r2, r2, r12
@--loop
add r3, r3, #1
b multiply
endMultiply:
@--printf result
push {r0-r12}
ldr r0, =printfResult
mov r1, r2
bl printf
pop {r0-r12}
@--if necessary print white space
sub r10, r9, #1
cmp r1, r10
bge endif
push {r0-r12}
ldr r0, =printfSpace
bl printf
pop {r0-r12}
endif:
@--loop
add r1, r1, #1
b forColumnsB
endForColumnsB:
@--loop
sub r10, r5, #1
cmp r0, r10
bge endif2
push {r0-r12}
ldr r0, =printfNewline
bl printf
pop {r0-r12}
endif2:
add r0, r0, #1
b forLinesA
endForLinesA:

b end

@--abort, imcompatible matrices
abort:
ldr r0, =printfError
bl printf

@--normal end of program
end:

mov r0, #0
pop {ip, pc}

  
.data
linesA: .word 0
columnsA: .word 0
linesB: .word 0
columnsB: .word 0
matrixA: .space 400
matrixB: .space 400
scanf1: .asciz "%d"
scanf2: .asciz "%d %d"
printfError: .asciz "Matrizes Incompativeis.n"
printfResult: .asciz "%05d"
printfSpace: .asciz " "
printfNewline: .asciz "n"
debug: .asciz "elemento = %dn"
debug2: .asciz "offset = %dn"

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