Question

In: Computer Science

Translate following function from C into RISC-V: Display Prime Numbers Between Two Intervals #include<stdio.h> int main(){...

Translate following function from C into RISC-V: Display Prime Numbers Between Two Intervals

#include<stdio.h>

int main(){

int low, high, i, flag;

printf("Entertwonumbers(intervals):");

scanf("%d%d",&low,&high);

printf("Primenumbersbetween%dand%dare:",low,high);

//iteration until low is not equal to high

while(low<high)

{

flag=0;

//ignore numbers less than 2

if(low<=1)

{

++low;

continue;

}

//if low is a non-prime number, flag will be 1

for(i=2;i<=low/2;++i)

{

if(low%i==0)

{

flag=1;

break;

}

}

if(flag==0)

printf("%d",low);

//to check prime for the next number

//increase low by 1

++low;

}

return0;

}

Solutions

Expert Solution

C to RISC-V :

.LC0:

        .string "Entertwonumbers(intervals):"

.LC1:

        .string "%d%d"

.LC2:

        .string "Primenumbersbetween%dand%dare:"

.LC3:

        .string "%d"

main:

        addi    sp,sp,-32

        sd      ra,24(sp)

        sd      s0,16(sp)

        addi    s0,sp,32

        lui     a5,%hi(.LC0)

        addi    a0,a5,%lo(.LC0)

        call    printf

        addi    a4,s0,-32

        addi    a5,s0,-28

        mv      a2,a4

        mv      a1,a5

        lui     a5,%hi(.LC1)

        addi    a0,a5,%lo(.LC1)

        call    scanf

        lw      a5,-28(s0)

        lw      a4,-32(s0)

        mv      a2,a4

        mv      a1,a5

        lui     a5,%hi(.LC2)

        addi    a0,a5,%lo(.LC2)

        call    printf

.L9:

        lw      a4,-28(s0)

        lw      a5,-32(s0)

        bge     a4,a5,.L2

        sw      zero,-24(s0)

        lw      a5,-28(s0)

        mv      a4,a5

        li      a5,1

        bgt     a4,a5,.L3

        lw      a5,-28(s0)

        addiw   a5,a5,1

        sext.w  a5,a5

        sw      a5,-28(s0)

        j       .L4

.L3:

        li      a5,2

        sw      a5,-20(s0)

.L7:

        lw      a5,-28(s0)

        srliw   a4,a5,31

        addw    a5,a4,a5

        sraiw   a5,a5,1

        sext.w  a4,a5

        lw      a5,-20(s0)

        sext.w  a5,a5

        bgt     a5,a4,.L5

        lw      a5,-28(s0)

        mv      a4,a5

        lw      a5,-20(s0)

        remw    a5,a4,a5

        sext.w  a5,a5

        bnez    a5,.L6

        li      a5,1

        sw      a5,-24(s0)

        j       .L5

.L6:

        lw      a5,-20(s0)

        addiw   a5,a5,1

        sw      a5,-20(s0)

        j       .L7

.L5:

        lw      a5,-24(s0)

        sext.w  a5,a5

        bnez    a5,.L8

        lw      a5,-28(s0)

        mv      a1,a5

        lui     a5,%hi(.LC3)

        addi    a0,a5,%lo(.LC3)

        call    printf

.L8:

        lw      a5,-28(s0)

        addiw   a5,a5,1

        sext.w  a5,a5

        sw      a5,-28(s0)

.L4:

        j       .L9

.L2:

        li      a5,0

        mv      a0,a5

        ld      ra,24(sp)

        ld      s0,16(sp)

        addi    sp,sp,32

        jr      ra

venereology answered 2 months ago
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