Risc-V-Asm/main.s

# Define variables
.data
.align 4
    num1: .word 5     # First number
    num2: .word 7     # Second number
    result: .word 0   # Variable to store the result
    msg: .ascii "Hello, World!\n"

# Main program entry point
.text
.global _start
.align 4
test_routine:
    la a0, num1    # Load the address of num1 into register a6
    li a1, 10      # Load the value 10 into register a5
    xori a2, a1, 0x1  # Calculate the value of a2
    sw a1, 0(a0)    # Store the value in memory
    ret

_start:
    call h2
    call test_routine
    call hello

    # Load the first number into register t0
    lw t0, num1

    # Load the second number into register t1
    lw t1, num2

    # Add the two numbers and store the result in register t2
    add t2, t0, t1

    # Store the result in memory
    la t3, result
    sw t2, 0(t3)

    # Call _hello
    la a0, result

    # End program
    ecall

h2:
    addi a0, x0, 0x68
	li a1, 0x10000000
	sb a0, (a1) # 'h'

	addi a0, x0, 0x65
	sb a0, (a1) # 'e'

	addi a0, x0, 0x6C
	sb a0, (a1) # 'l'

	addi a0, x0, 0x6C
	sb a0, (a1) # 'l'

	addi a0, x0, 0x6F
	sb a0, (a1) # 'o'
    ret

hello:
    # Write the string "Hello, World!\n" to stdout
    la a0, msg              # Load the address of the string into a0
    li a7, 4                # syscall number for write
    li a1, 13               # Length of the string
    li a2, 1                # File descriptor: stdout
    ecall                   # Make the system call to write
    ret                     # Return from the function

# To avoid the program from exiting
loop: j loop