Question

Problem 3) Write a Motorola program that calculates X (a 16bit number stored in memory) raised to the Y (a 8bit number stored in memory) power. The prograri should have a while repetition control structure.

Motorola MC68000 Please

Answer 1

Question:

Write a Motorola program that calculates X (a 16bit number stored in memory) raised to the Y (a 8bit number stored in memory) power. The program should have a whilerepetition control structure.

Answer:

Step 1: Write C Program to operation power(x,y) create file find_pow_of_x_y.c and below is the code

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$ cat find_pow_of_x_y.c
#include <stdio.h>
#include <math.h>
int main()
{
double base, power, result;
printf("Enter the base number: ");
scanf("%lf", &base);
printf("Enter the power raised: ");
scanf("%lf",&power);
result = pow(base,power);
printf("%.1lf^%.1lf = %.2lf\n", base, power, result);
return 0;
}

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Step 2: Convert the C program into ASM68K Code using linux command

$ gcc -O2 -S -c find_pow_of_x_y.c

Step 3: Above Linux Command will generate .s file-name find_pow_of_x_y.s and below is the ASM68K language code

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$ cat find_pow_of_x_y.s
.file "find_pow_of_x_y.c"
.section .rodata.str1.1,"aMS",@progbits,1
.LC0:
.string "Enter the base number: "
.LC1:
.string "%lf"
.LC2:
.string "Enter the power raised: "
.LC3:
.string "%.1lf^%.1lf = %.2lf\n"
.text
.p2align 4,,15
.globl main
.type main, @function
main:
.LFB14:
.cfi_startproc
subq $24, %rsp
.cfi_def_cfa_offset 32
movl $.LC0, %edi
xorl %eax, %eax
call printf
leaq 8(%rsp), %rsi
movl $.LC1, %edi
xorl %eax, %eax
call __isoc99_scanf
movl $.LC2, %edi
xorl %eax, %eax
call printf
movq %rsp, %rsi
movl $.LC1, %edi
xorl %eax, %eax
call __isoc99_scanf
movsd (%rsp), %xmm1
movsd 8(%rsp), %xmm0
call pow
movsd (%rsp), %xmm1
movl $.LC3, %edi
movapd %xmm0, %xmm2
movl $3, %eax
movsd 8(%rsp), %xmm0
call printf
xorl %eax, %eax
addq $24, %rsp
.cfi_def_cfa_offset 8
ret
.cfi_endproc
.LFE14:
.size main, .-main
.ident "GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-3)"
.section .note.GNU-stack,"",@progbits

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Compile and Execute the above ASM68K language in MC68000 Machine operating system and validate,verify the output.