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Add rfp register, remove debug message about intruction pointer == None

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This commit is contained in:
Ry 2022-09-18 16:30:52 -07:00
parent f7b2320138
commit eba264db70
1 changed files with 5 additions and 2 deletions
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7
src/cpu.rs
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@ -52,6 +52,7 @@ pub struct Cpu {
pub instruction_pointer: u32,
pub stack_pointer: u32,
pub exception_stack_pointer: u32,
pub frame_pointer: u32,
pub register: [u32; 32],
pub flag: Flag,
@ -66,6 +67,7 @@ impl Cpu {
instruction_pointer: 0xF0000000,
stack_pointer: 0x00000000,
exception_stack_pointer: 0x00000000,
frame_pointer: 0x00000000,
register: [0; 32],
flag: Flag { swap_sp: false, interrupt: false, carry: false, zero: false },
halted: false,
@ -139,6 +141,7 @@ impl Cpu {
0..=31 => self.register[register as usize],
32 => self.stack_pointer,
33 => self.exception_stack_pointer,
34 => self.frame_pointer,
_ => panic!("Invalid register: {}", register),
}
}
@ -147,6 +150,7 @@ impl Cpu {
0..=31 => self.register[register as usize] = word,
32 => self.stack_pointer = word,
33 => self.exception_stack_pointer = word,
34 => self.frame_pointer = word,
_ => panic!("Invalid register: {}", register),
};
}
@ -168,6 +172,7 @@ impl Cpu {
);
}
println!("rsp: {:#010X} | resp: {:#010X}", self.stack_pointer, self.exception_stack_pointer);
println!("rfp: {:#010X}", self.frame_pointer);
}
pub fn push_stack_8(&mut self, byte: u8) {
let decremented_stack_pointer = self.stack_pointer.overflowing_sub(1);
@ -324,8 +329,6 @@ impl Cpu {
let next_instruction_pointer = self.execute_instruction(instruction);
if let Some(next) = next_instruction_pointer {
self.instruction_pointer = next;
} else {
println!("next instruction pointer is None!")
}
} else {
let size = ((opcode & 0b1100000000000000) >> 14) as u8;