I'm trying to learn Assembly. I tried to sum float numbers, then I wanted to print result to. But I couldn't. How can I do it;

section .data
    float1 dd 3.14
    float2 dd 1.59
    float3 dd 0.0
    prompt db 'Result: ', 0

section .text
    global _start

_start:
    movss xmm0, [float1]
    movss xmm1, [float2]

    addss xmm0, xmm1

    movss [float3], xmm0

    mov rax, 1
    mov rdi, 1
    mov rsi, prompt
    mov rdx, 9
    syscall

    fistp dword [float3]

    mov rax, 1
    mov rdi, 1
    mov rsi, float3
    mov rdx, 5
    syscall

    mov rax, 60
    xor rdi, rdi
    syscall

Current output is 'Result: �R%', when I run with 'cat -e': 'Result: ^@^@^@^@M-^@R%'. How can I print my float value?