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use juicebox_asm::insn::Jmp;
use juicebox_asm::{Asm, Label};
#[test]
#[should_panic]
fn unbound_label() {
let _l = Label::new();
}
#[test]
#[should_panic]
fn unbound_label2() {
let mut lbl = Label::new();
let mut asm = Asm::new();
asm.jmp(&mut lbl);
}
#[test]
fn jmp_label() {
{
// Bind first.
let mut lbl = Label::new();
let mut asm = Asm::new();
asm.bind(&mut lbl);
asm.jmp(&mut lbl);
// 0xfffffffb -> -5
assert_eq!(asm.into_code(), [0xe9, 0xfb, 0xff, 0xff, 0xff]);
}
{
// Bind later.
let mut lbl = Label::new();
let mut asm = Asm::new();
asm.jmp(&mut lbl);
asm.bind(&mut lbl);
assert_eq!(asm.into_code(), [0xe9, 0x00, 0x00, 0x00, 0x00]);
}
}
#[test]
fn jmp_label2() {
{
let mut lbl = Label::new();
let mut asm = Asm::new();
asm.jmp(&mut lbl);
asm.nop();
asm.nop();
asm.bind(&mut lbl);
assert_eq!(asm.into_code(), [0xe9, 0x02, 0x00, 0x00, 0x00, 0x90, 0x90]);
}
{
let mut lbl = Label::new();
let mut asm = Asm::new();
asm.jmp(&mut lbl);
for _ in 0..0x1ff {
asm.nop();
}
asm.bind(&mut lbl);
assert_eq!(asm.into_code()[..5], [0xe9, 0xff, 0x01, 0x00, 0x00]);
}
}
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