Question

Convert the following C program into the RISC-V assembly code. You should look up a table to convert the lines manually and you can use "ecall" when appropriate (Don't make it too complicated than it needs to be):

#include

int main()

{

int x = 30, y = 17;

printf("x * y = ");

printf("%d\n", x*y);

return 0;

}

Answer 1

the above mentioned c program is converted into RISC - V assembly code as follows :

.LC0:

        .string "x * y = "

.LC1:

        .string "%d\n"

main:

        addi    sp,sp,-32

        sd      ra,24(sp)

        sd      s0,16(sp)

        addi    s0,sp,32

        li      a5,30

        sw      a5,-20(s0)

        li      a5,17

        sw      a5,-24(s0)

        lui     a5,%hi(.LC0)

        addi    a0,a5,%lo(.LC0)

        call    printf

        lw      a4,-20(s0)

        lw      a5,-24(s0)

        mulw    a5,a4,a5

        sext.w  a5,a5

        mv      a1,a5

        lui     a5,%hi(.LC1)

        addi    a0,a5,%lo(.LC1)

        call    printf

        li      a5,0

        mv      a0,a5

        ld      ra,24(sp)

        ld      s0,16(sp)

        addi    sp,sp,32

        jr      ra