Q1. Write an SRC assembly language program to evaluate the following expression:
f = 4(k+32) + 16(g-h)
Note that your code should not change the source operands and also keep in mind that the SRC does not have a multiply instruction
Part b: 5 marks
Draw memory map table for the above program using the following scenario and assume that SRC uses 16-bit memory in this case.
.ORG 300 ; start the next line at address 300
k: .DW 1 ;
g: .DW 1 ;
h: .DW 1 ;
f: .DW 1 ;
;
.ORG 400 ; start the code at address 400
The code starts at address 400 and each instruction takes 16-bits in the memory.
Solution:
Write an SRC assembly language program to evaluate the following expression:
f = 4(k+32) + 16(g-h)
Note that your code should not change the source operands and also keep in mind that the SRC does not have a multiply instruction
Solution
ld R1,g ;
ld R3,h ;
sub R5,R3,R1 ;
shl R4,R5,4 ; l
addi R7,R6,32 ;
shl R8,R7,2 ;
add R9,R8,R4
st R9,f
Part b: 5 marks
Draw memory map table for the above program using the following scenario and assume that SRC uses 16-bit memory in this case.
.ORG 300 ; start the next line at address 300
k: .DW 1 ;
g: .DW 1 ;
h: .DW 1 ;
f: .DW 1 ;
;
.ORG 400 ; start the code at address 400
The code starts at address 400 and each instruction takes 16-bits in the memory.
Solution
f = 4(k+32) + 16(g-h)
Note that your code should not change the source operands and also keep in mind that the SRC does not have a multiply instruction
Part b: 5 marks
Draw memory map table for the above program using the following scenario and assume that SRC uses 16-bit memory in this case.
.ORG 300 ; start the next line at address 300
k: .DW 1 ;
g: .DW 1 ;
h: .DW 1 ;
f: .DW 1 ;
;
.ORG 400 ; start the code at address 400
The code starts at address 400 and each instruction takes 16-bits in the memory.
Solution:
Write an SRC assembly language program to evaluate the following expression:
f = 4(k+32) + 16(g-h)
Note that your code should not change the source operands and also keep in mind that the SRC does not have a multiply instruction
Solution
ld R1,g ;
ld R3,h ;
sub R5,R3,R1 ;
shl R4,R5,4 ; l
addi R7,R6,32 ;
shl R8,R7,2 ;
add R9,R8,R4
st R9,f
Part b: 5 marks
Draw memory map table for the above program using the following scenario and assume that SRC uses 16-bit memory in this case.
.ORG 300 ; start the next line at address 300
k: .DW 1 ;
g: .DW 1 ;
h: .DW 1 ;
f: .DW 1 ;
;
.ORG 400 ; start the code at address 400
The code starts at address 400 and each instruction takes 16-bits in the memory.
Solution
Memory Map
Memory Address
|
Memory Contents
|
300
|
unknown
|
304
|
unknown
|
308
|
unknown
|
312
|
unknown
|
…..
|
|
400
|
ld R1,g
|
402
|
ld R3,h
|
404
|
sub R4,R3,R1
|
406
|
shl R4,R5,4
|
408
|
addi R7,R6,32
|
410
|
shl R8,R7,2
|
412
|
add R9,R8,R4
|
414
|
st R9,f
|
