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remove unused function dec_x

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This commit is contained in:
Sam M W 2022-10-21 06:37:41 +01:00
parent 7500e8816e
commit 1d0fd6aad0
1 changed files with 8 additions and 14 deletions
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22
src/cpu.rs
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@ -707,12 +707,6 @@ impl CPU {
);
}
fn dec_x(&mut self) {
let mut r = self.registers.index_x;
CPU::decrement(&mut r, &mut self.registers.status);
self.load_x_register(r);
}
fn jump(&mut self, addr: Address) {
self.registers.program_counter = addr;
}
@ -1160,14 +1154,14 @@ mod tests {
fn dec_x_test() {
let mut cpu = CPU::new();
cpu.dec_x();
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
assert_eq!(cpu.registers.index_x, 0xff);
assert!(!cpu.registers.status.contains(Status::PS_CARRY));
assert!(!cpu.registers.status.contains(Status::PS_ZERO));
assert!(cpu.registers.status.contains(Status::PS_NEGATIVE));
assert!(!cpu.registers.status.contains(Status::PS_OVERFLOW));
cpu.dec_x();
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
assert_eq!(cpu.registers.index_x, 0xfe);
assert!(!cpu.registers.status.contains(Status::PS_CARRY));
assert!(!cpu.registers.status.contains(Status::PS_ZERO));
@ -1175,17 +1169,17 @@ mod tests {
assert!(!cpu.registers.status.contains(Status::PS_OVERFLOW));
cpu.load_x_register(5);
cpu.dec_x();
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
assert_eq!(cpu.registers.index_x, 4);
assert!(!cpu.registers.status.contains(Status::PS_CARRY));
assert!(!cpu.registers.status.contains(Status::PS_ZERO));
assert!(!cpu.registers.status.contains(Status::PS_NEGATIVE));
assert!(!cpu.registers.status.contains(Status::PS_OVERFLOW));
cpu.dec_x();
cpu.dec_x();
cpu.dec_x();
cpu.dec_x();
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
assert_eq!(cpu.registers.index_x, 0);
assert!(!cpu.registers.status.contains(Status::PS_CARRY));
@ -1193,7 +1187,7 @@ mod tests {
assert!(!cpu.registers.status.contains(Status::PS_NEGATIVE));
assert!(!cpu.registers.status.contains(Status::PS_OVERFLOW));
cpu.dec_x();
cpu.execute_instruction((Instruction::DEX, OpInput::UseImplied));
assert_eq!(cpu.registers.index_x, 0xff);
assert!(!cpu.registers.status.contains(Status::PS_CARRY));
assert!(!cpu.registers.status.contains(Status::PS_ZERO));