Question

Translate function f into RISC-V assembly language. Assume the function declaration for g is int g(int a, int b). e code for function f is as follows: int f(int a, int b, int c, int d){ return g(g(a,b), c d); }

Answer 1

Answer:

int f(int a, int b, int c) {

return func(func(a, b), c);

}

f: addiu $sp, $sp, -8 # allocate frame = 8 bytes

sw $ra, 0($sp) # save return address

sw $a2, 4($sp) # save c

jal func # call func(a,b)

move $a0, $v0 # $a0 = result of func(a,b)

lw $a1, 4($sp) # $a1 = c

jal func # call func(func(a,b),c)

lw $ra, 0($sp) # restore return address

addiu $sp, $sp, 8 # free stack frame

jr $ra # return to caller