Question

In: Computer Science

Please convert the following C program into the RISC-V assembly code 1) #include <stdio.h> int main()...

Please convert the following C program into the RISC-V assembly code

1)

#include <stdio.h>

int main()

{

int i = 2, j = 2 + i, k;

k = i * j;

printf("%d\n", k + j);

return 0;

}

2)

#include <stdio.h>

int main()

{

int i = 2, j = 2 + i, k = j / 2;

if (k == 1)

{

printf("%d\n", j)

k = k * 2;

if ( k == j)

{

printf("%d\n|, j);

}

else

printf("%d\n", k);

return 0;

}

Expert Solution

This conversion can be done in several ways and the best mode of converting the C code into RISC-V assembly code is using a gcc compiler and follow this command.Let suppose the name of the c program file is program.c,in ur gcc compiler type

gcc -S program.c

This will generate you program.s file that is your assembly code for the C code.Anyways C language does the same process in the background.Here is the assembly code for C programs.

1)

.LC0:
        .string "%d\n"
main:
        addi    sp,sp,-32
        sd      ra,24(sp)
        sd      s0,16(sp)
        addi    s0,sp,32
        li      a5,2
        sw      a5,-20(s0)
        lw      a5,-20(s0)
        addiw   a5,a5,2
        sw      a5,-24(s0)
        lw      a4,-20(s0)
        lw      a5,-24(s0)
        mulw    a5,a4,a5
        sw      a5,-28(s0)
        lw      a4,-28(s0)
        lw      a5,-24(s0)
        addw    a5,a4,a5
        sext.w  a5,a5
        mv      a1,a5
        lui     a5,%hi(.LC0)
        addi    a0,a5,%lo(.LC0)
        call    printf
        li      a5,0
        mv      a0,a5
        ld      ra,24(sp)
        ld      s0,16(sp)
        addi    sp,sp,32
        jr      ra

2)

.LC0:
        .string "%d\n"
.LC1:
        .string "%d\n|"
main:
        addi    sp,sp,-32
        sd      ra,24(sp)
        sd      s0,16(sp)
        addi    s0,sp,32
        li      a5,2
        sw      a5,-20(s0)
        lw      a5,-20(s0)
        addiw   a5,a5,2
        sw      a5,-24(s0)
        lw      a5,-24(s0)
        srliw   a4,a5,31
        addw    a5,a4,a5
        sraiw   a5,a5,1
        sw      a5,-28(s0)
        lw      a5,-28(s0)
        sext.w  a4,a5
        li      a5,1
        bne     a4,a5,.L2
        lw      a5,-24(s0)
        mv      a1,a5
        lui     a5,%hi(.LC0)
        addi    a0,a5,%lo(.LC0)
        call    printf
        lw      a5,-28(s0)
        slliw   a5,a5,1
        sw      a5,-28(s0)
        lw      a4,-28(s0)
        lw      a5,-24(s0)
        sext.w  a4,a4
        sext.w  a5,a5
        bne     a4,a5,.L3
        lw      a5,-24(s0)
        mv      a1,a5
        lui     a5,%hi(.LC1)
        addi    a0,a5,%lo(.LC1)
        call    printf
        j       .L4
.L3:
        lw      a5,-28(s0)
        mv      a1,a5
        lui     a5,%hi(.LC0)
        addi    a0,a5,%lo(.LC0)
        call    printf
.L4:
        li      a5,0
        j       .L5
.L2:
        li      a5,0
.L5:
        mv      a0,a5
        ld      ra,24(sp)
        ld      s0,16(sp)
        addi    sp,sp,32
        jr      ra

For any queries please comment.

venereology answered 1 year ago

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