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chore: Document prefixed opcode decoding

This commit is contained in:
Rekai Nyangadzayi Musuka 2020-09-07 21:22:26 -05:00
parent 7538f946d4
commit eb90ac31e2
1 changed files with 11 additions and 11 deletions
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22
src/instruction.rs
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@ -1376,9 +1376,9 @@ impl Instruction {
match x {
0 => Table::rot(y, z),
1 => Self::BIT(y, Table::r(z)),
2 => Self::BIT(y, Table::r(z)),
3 => Self::BIT(y, Table::r(z)),
1 => Self::BIT(y, Table::r(z)), // BIT y, r[z]
2 => Self::RES(y, Table::r(z)), // RES y, r[z]
3 => Self::SET(y, Table::r(z)), // SET y, r[z]
_ => panic!(
"Unknown Prefixed Opcode: 0xCB {:#x?}\n x: {}, z: {}, q: {}, y: {}, p: {}",
opcode, x, z, q, y, p
@ -1612,14 +1612,14 @@ impl Table {
pub fn rot(index: u8, r_index: u8) -> Instruction {
match index {
0 => Instruction::RLC(Self::r(r_index)),
1 => Instruction::RRC(Self::r(r_index)),
2 => Instruction::RL(Self::r(r_index)),
3 => Instruction::RR(Self::r(r_index)),
4 => Instruction::SLA(Self::r(r_index)),
5 => Instruction::SRA(Self::r(r_index)),
6 => Instruction::SWAP(Self::r(r_index)),
7 => Instruction::SRL(Self::r(r_index)),
0 => Instruction::RLC(Self::r(r_index)), // RLC r[z]
1 => Instruction::RRC(Self::r(r_index)), // RRC r[z]
2 => Instruction::RL(Self::r(r_index)), // RL r[z]
3 => Instruction::RR(Self::r(r_index)), // RR r[z]
4 => Instruction::SLA(Self::r(r_index)), // SLA r[z]
5 => Instruction::SRA(Self::r(r_index)), // SRA r[z]
6 => Instruction::SWAP(Self::r(r_index)), // SWAP r[z]
7 => Instruction::SRL(Self::r(r_index)), // SRL r[z]
_ => unreachable!("Index {} is out of bounds in rot[]"),
}
}