Question

In: Computer Science

Translate the following procedure to RISC-V assembly long long int myfun(long long int a, long long...

Translate the following procedure to RISC-V assembly

long long int myfun(long long int a, long long int b)
{
  return fun(fun(a-b), a+b);
}

Assume that function fun exists and accepts a single long long int argument and returns a long long int argument. Make use of the tail call optimization if possible, and use the least number of stack operations (reading and writing to the stack). You do not need to write comments or a main program. Submit a regular file called myfun.asm. You do not need to run it on the simulator.

Expert Solution

Hi, I guess there is bit wrong in quesion. If fun only accepts 1 arguement then in return statement outer fun function is accepting two arguements. So,I feel it would myfun over there I corrected that as return myfun(fun(a-b), a+b);

And, gave the code accordingly otherwise there would be compilation error

RISC Assembly Program :-

myfun:

addi sp,sp,-32

sd ra,24(sp)

sd s0,16(sp)

addi s0,sp,32

sd a0,-24(s0)

sd a1,-32(s0)

ld a4,-24(s0)

ld a5,-32(s0)

sub a5,a4,a5

mv a0,a5

call fun

mv a3,a0

ld a4,-24(s0)

ld a5,-32(s0)

add a5,a4,a5

mv a1,a5

mv a0,a3

call myfun

mv a5,a0

mv a0,a5

ld ra,24(sp)

ld s0,16(sp)

addi sp,sp,32

jr ra

venereology answered 1 week ago

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