luaur_code_gen/methods/
assembly_builder_x_64_jcc.rs

1use crate::enums::condition_x_64::ConditionX64;
2use crate::records::assembly_builder_x_64::AssemblyBuilderX64;
3use crate::records::label::Label;
4
5impl AssemblyBuilderX64 {
6    pub fn jcc(&mut self, cond: ConditionX64, label: &mut Label) {
7        let cc = match cond {
8            ConditionX64::Overflow => 0x70,
9            ConditionX64::NoOverflow => 0x71,
10            ConditionX64::Carry => 0x72,
11            ConditionX64::NoCarry => 0x73,
12            ConditionX64::Below => 0x72,
13            ConditionX64::BelowEqual => 0x76,
14            ConditionX64::Above => 0x77,
15            ConditionX64::AboveEqual => 0x73,
16            ConditionX64::Equal => 0x74,
17            ConditionX64::Less => 0x7c,
18            ConditionX64::LessEqual => 0x7e,
19            ConditionX64::Greater => 0x7f,
20            ConditionX64::GreaterEqual => 0x7d,
21            ConditionX64::NotBelow => 0x73,
22            ConditionX64::NotBelowEqual => 0x77,
23            ConditionX64::NotAbove => 0x76,
24            ConditionX64::NotAboveEqual => 0x72,
25            ConditionX64::NotEqual => 0x75,
26            ConditionX64::NotLess => 0x7d,
27            ConditionX64::NotLessEqual => 0x7f,
28            ConditionX64::NotGreater => 0x7e,
29            ConditionX64::NotGreaterEqual => 0x7c,
30            ConditionX64::Zero => 0x74,
31            ConditionX64::NotZero => 0x75,
32            ConditionX64::Parity => 0x7a,
33            ConditionX64::NotParity => 0x7b,
34            ConditionX64::Count => 0x70,
35        };
36        // C++ passes `jccTextForCondition[cond]` as the disassembler mnemonic — NOT
37        // null, which would `strlen(NULL)` in the log path. Order matches the
38        // `ConditionX64` discriminants (same order as `codeForCondition`).
39        let jcc_text = [
40            c"jo", c"jno", c"jc", c"jnc", c"jb", c"jbe", c"ja", c"jae", c"je", c"jl", c"jle",
41            c"jg", c"jge", c"jnb", c"jnbe", c"jna", c"jnae", c"jne", c"jnl", c"jnle", c"jng",
42            c"jnge", c"jz", c"jnz", c"jp", c"jnp",
43        ];
44        let name = jcc_text[cond as usize].as_ptr();
45
46        // C++ passes `codeForCondition[cond]` (the 0-15 condition code); this match
47        // holds the full rel8 opcodes (0x70|cc), so `place_jcc` (which does
48        // `0x80 | code`) needs just the low-nibble condition code.
49        self.place_jcc(name, label, (cc & 0x0F) as u8);
50    }
51}
luaur_code_gen/methods/assembly_builder_x_64_jcc.rs

luaur_code_gen/methods/
assembly_builder_x_64_jcc.rs
