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transistor 2022-09-13 22:00:34 -07:00
parent 575501599a
commit 42ca95ef5a
1 changed files with 19 additions and 19 deletions
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38
src/cpus/m68k/execute.rs
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@ -448,7 +448,7 @@ impl M68k {
} else {
self.set_flag(Flags::Carry, true);
self.set_flag(Flags::Overflow, true);
self.set_flag(Flags::Negative, quotient < 0);
self.set_flag(Flags::Negative, (quotient as i32) < 0);
}
},
Instruction::DIVL(src, dest_h, dest_l, sign) => {
@ -1118,6 +1118,24 @@ impl M68k {
*reg_addr
}
pub fn get_address_sized(&mut self, addr: Address, size: Size) -> Result<u32, Error> {
self.start_request(addr as u32, size, MemAccess::Read, MemType::Data)?;
match size {
Size::Byte => self.port.read_u8(addr).map(|value| value as u32),
Size::Word => self.port.read_beu16(addr).map(|value| value as u32),
Size::Long => self.port.read_beu32(addr),
}
}
pub fn set_address_sized(&mut self, addr: Address, value: u32, size: Size) -> Result<(), Error> {
self.start_request(addr as u32, size, MemAccess::Write, MemType::Data)?;
match size {
Size::Byte => self.port.write_u8(addr, value as u8),
Size::Word => self.port.write_beu16(addr, value as u16),
Size::Long => self.port.write_beu32(addr, value),
}
}
pub fn start_instruction_request(&mut self, addr: u32) -> Result<u32, Error> {
self.state.request.is_instruction = true;
self.state.request.code = FunctionCode::program(self.state.sr);
@ -1144,24 +1162,6 @@ impl M68k {
}
}
pub fn get_address_sized(&mut self, addr: Address, size: Size) -> Result<u32, Error> {
self.start_request(addr as u32, size, MemAccess::Read, MemType::Data)?;
match size {
Size::Byte => self.port.read_u8(addr).map(|value| value as u32),
Size::Word => self.port.read_beu16(addr).map(|value| value as u32),
Size::Long => self.port.read_beu32(addr),
}
}
pub fn set_address_sized(&mut self, addr: Address, value: u32, size: Size) -> Result<(), Error> {
self.start_request(addr as u32, size, MemAccess::Write, MemType::Data)?;
match size {
Size::Byte => self.port.write_u8(addr, value as u8),
Size::Word => self.port.write_beu16(addr, value as u16),
Size::Long => self.port.write_beu32(addr, value),
}
}
fn push_word(&mut self, value: u16) -> Result<(), Error> {
*self.get_stack_pointer_mut() -= 2;
let addr = *self.get_stack_pointer_mut();