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Slightly improved the handling of the I/N bit in Address Error

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This commit is contained in:
transistor 2022-09-16 20:49:44 -07:00
parent ef6fde2a4f
commit 71c10ff0f0
4 changed files with 75 additions and 48 deletions
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71
src/cpus/m68k/execute.rs
View File

@ -133,6 +133,21 @@ impl M68k {
pub fn exception(&mut self, number: u8, is_interrupt: bool) -> Result<(), Error> {
debug!("{}: raising exception {}", DEV_NAME, number);
if number == Exceptions::BusError as u8 || number == Exceptions::AddressError as u8 {
let result = self.setup_group0_exception(number);
if let Err(err) = result {
self.state.status = Status::Stopped;
return Err(err);
}
} else {
self.setup_normal_exception(number, is_interrupt)?;
}
Ok(())
}
pub fn setup_group0_exception(&mut self, number: u8) -> Result<(), Error> {
let ins_word = self.decoder.instruction_word;
let extra_code = self.state.request.get_type_code();
let fault_size = self.state.request.size.in_bytes();
@ -143,17 +158,32 @@ impl M68k {
self.push_word(offset)?;
}
// If BusError or AddressError
if number == 2 || number == 3 {
self.push_long(self.state.pc - fault_size)?;
self.push_word(self.state.sr)?;
self.push_word(ins_word)?;
self.push_long(fault_address)?;
self.push_word((ins_word & 0xFFF0) | extra_code)?;
} else {
self.push_long(self.state.pc)?;
self.push_word(self.state.sr)?;
self.push_long(self.state.pc - fault_size)?;
self.push_word(self.state.sr)?;
self.push_word(ins_word)?;
self.push_long(fault_address)?;
self.push_word((ins_word & 0xFFF0) | extra_code)?;
// Changes to the flags must happen after the previous value has been pushed to the stack
self.set_flag(Flags::Supervisor, true);
self.set_flag(Flags::Tracing, false);
let vector = self.state.vbr + offset as u32;
let addr = self.port.read_beu32(vector as Address)?;
self.set_pc(addr)?;
Ok(())
}
pub fn setup_normal_exception(&mut self, number: u8, is_interrupt: bool) -> Result<(), Error> {
self.state.request.i_n_bit = true;
let offset = (number as u16) << 2;
if self.cputype >= M68kType::MC68010 {
self.push_word(offset)?;
}
self.push_long(self.state.pc)?;
self.push_word(self.state.sr)?;
// Changes to the flags must happen after the previous value has been pushed to the stack
self.set_flag(Flags::Supervisor, true);
@ -164,15 +194,7 @@ impl M68k {
let vector = self.state.vbr + offset as u32;
let addr = self.port.read_beu32(vector as Address)?;
let result = self.set_pc(addr);
// If BusError or AddressError, and another AddressError occurs, then halt
if number == 2 || number == 3 {
if let Err(err) = result {
self.state.status = Status::Stopped;
return Err(err);
}
}
self.set_pc(addr)?;
Ok(())
}
@ -398,7 +420,12 @@ impl M68k {
}
},
Instruction::CLR(target, size) => {
self.set_target_value(target, 0, size, Used::Once)?;
if self.cputype == M68kType::MC68000 {
self.get_target_value(target, size, Used::Twice)?;
self.set_target_value(target, 0, size, Used::Twice)?;
} else {
self.set_target_value(target, 0, size, Used::Once)?;
}
// Clear flags except Zero flag
self.state.sr = (self.state.sr & 0xFFF0) | (Flags::Zero as u16);
},
@ -1142,7 +1169,7 @@ impl M68k {
}
pub fn start_instruction_request(&mut self, addr: u32) -> Result<u32, Error> {
self.state.request.is_instruction = true;
self.state.request.i_n_bit = false;
self.state.request.code = FunctionCode::program(self.state.sr);
self.state.request.access = MemAccess::Read;
self.state.request.address = addr;
@ -1151,7 +1178,7 @@ impl M68k {
}
pub fn start_request(&mut self, addr: u32, size: Size, access: MemAccess, mtype: MemType) -> Result<u32, Error> {
self.state.request.is_instruction = false;
self.state.request.i_n_bit = false;
self.state.request.code = match mtype {
MemType::Program => FunctionCode::program(self.state.sr),
MemType::Data => FunctionCode::data(self.state.sr),

6
src/cpus/m68k/state.rs
View File

@ -98,7 +98,7 @@ pub enum MemAccess {
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct MemoryRequest {
pub is_instruction: bool,
pub i_n_bit: bool,
pub access: MemAccess,
pub code: FunctionCode,
pub size: Size,
@ -229,7 +229,7 @@ impl FunctionCode {
impl MemoryRequest {
pub fn new() -> Self {
Self {
is_instruction: false,
i_n_bit: false,
access: MemAccess::Read,
code: FunctionCode::Reserved0,
size: Size::Word,
@ -238,7 +238,7 @@ impl MemoryRequest {
}
pub fn get_type_code(&self) -> u16 {
let ins = match self.is_instruction {
let ins = match self.i_n_bit {
false => 0x0000,
true => 0x0008,
};

24
tests/harte_tests/latest.txt
View File

@ -1,4 +1,4 @@
Last run on 2022-09-14 at commit a3fbcc7c16f80dd7801ceacf1d4a22a7bf88e9e1
Last run on 2022-09-16 at commit ef6fde2a4f7e79310a749d2e10e470bca435e90c
ABCD.json completed: 301 passed, 7764 FAILED
ADD.b.json completed, all passed!
@ -28,8 +28,8 @@ BTST.json completed: 8052 passed, 13 FAILED
Bcc.json completed: 5865 passed, 2200 FAILED
CHK.json completed: 7744 passed, 321 FAILED
CLR.b.json completed, all passed!
CLR.l.json completed: 6882 passed, 1183 FAILED
CLR.w.json completed: 6862 passed, 1203 FAILED
CLR.l.json completed: 7472 passed, 593 FAILED
CLR.w.json completed: 7465 passed, 600 FAILED
CMP.b.json completed, all passed!
CMP.l.json completed, all passed!
CMP.w.json completed, all passed!
@ -50,12 +50,12 @@ JMP.json completed: 4259 passed, 3806 FAILED
JSR.json completed: 4183 passed, 3882 FAILED
LEA.json completed, all passed!
LINK.json completed, all passed!
LSL.b.json completed: 7774 passed, 291 FAILED
LSL.l.json completed: 7017 passed, 1048 FAILED
LSL.w.json completed: 7494 passed, 571 FAILED
LSR.b.json completed: 7797 passed, 268 FAILED
LSR.l.json completed: 7044 passed, 1021 FAILED
LSR.w.json completed: 7512 passed, 553 FAILED
LSL.b.json completed: 7809 passed, 256 FAILED
LSL.l.json completed: 7056 passed, 1009 FAILED
LSL.w.json completed: 7523 passed, 542 FAILED
LSR.b.json completed: 7817 passed, 248 FAILED
LSR.l.json completed: 7072 passed, 993 FAILED
LSR.w.json completed: 7541 passed, 524 FAILED
MOVE.b.json completed, all passed!
MOVE.l.json completed: 5827 passed, 2238 FAILED
MOVE.q.json completed, all passed!
@ -103,7 +103,7 @@ ROXL.w.json completed: 7892 passed, 173 FAILED
ROXR.b.json completed: 8037 passed, 28 FAILED
ROXR.l.json completed: 8022 passed, 43 FAILED
ROXR.w.json completed: 7880 passed, 185 FAILED
RTE.json completed: 2047 passed, 6018 FAILED
RTE.json completed: 4011 passed, 4054 FAILED
RTR.json completed: 4038 passed, 4027 FAILED
RTS.json completed: 4008 passed, 4057 FAILED
SBCD.json completed: 884 passed, 7181 FAILED
@ -125,5 +125,5 @@ TST.l.json completed, all passed!
TST.w.json completed, all passed!
UNLINK.json completed, all passed!
passed: 896112, failed: 103948, total 90%
completed in 15m 7s
passed: 899449, failed: 100611, total 90%
completed in 14m 6s

22
tests/harte_tests/previous.txt
View File

@ -1,4 +1,4 @@
Last run on 2022-09-13 at commit 099b2fcb559afef16c91a65d084c00595a637597
Last run on 2022-09-14 at commit a3fbcc7c16f80dd7801ceacf1d4a22a7bf88e9e1
ABCD.json completed: 301 passed, 7764 FAILED
ADD.b.json completed, all passed!
@ -14,12 +14,12 @@ AND.l.json completed: 7779 passed, 286 FAILED
AND.w.json completed: 7764 passed, 301 FAILED
ANDItoCCR.json completed, all passed!
ANDItoSR.json completed, all passed!
ASL.b.json completed: 7205 passed, 860 FAILED
ASL.l.json completed: 6446 passed, 1619 FAILED
ASL.w.json completed: 7035 passed, 1030 FAILED
ASR.b.json completed: 6316 passed, 1749 FAILED
ASR.l.json completed: 7007 passed, 1058 FAILED
ASR.w.json completed: 6740 passed, 1325 FAILED
ASL.b.json completed: 7238 passed, 827 FAILED
ASL.l.json completed: 6471 passed, 1594 FAILED
ASL.w.json completed: 7053 passed, 1012 FAILED
ASR.b.json completed: 6347 passed, 1718 FAILED
ASR.l.json completed: 7040 passed, 1025 FAILED
ASR.w.json completed: 6763 passed, 1302 FAILED
BCHG.json completed, all passed!
BCLR.json completed, all passed!
BSET.json completed, all passed!
@ -37,7 +37,7 @@ CMPA.l.json completed, all passed!
CMPA.w.json completed, all passed!
DBcc.json completed: 6101 passed, 1964 FAILED
DIVS.json completed: 3685 passed, 4380 FAILED
DIVU.json completed: 4368 passed, 3697 FAILED
DIVU.json completed: 5595 passed, 2470 FAILED
EOR.b.json completed, all passed!
EOR.l.json completed: 7519 passed, 546 FAILED
EOR.w.json completed: 7525 passed, 540 FAILED
@ -49,7 +49,7 @@ EXT.w.json completed, all passed!
JMP.json completed: 4259 passed, 3806 FAILED
JSR.json completed: 4183 passed, 3882 FAILED
LEA.json completed, all passed!
LINK.json completed: 7060 passed, 1005 FAILED
LINK.json completed, all passed!
LSL.b.json completed: 7774 passed, 291 FAILED
LSL.l.json completed: 7017 passed, 1048 FAILED
LSL.w.json completed: 7494 passed, 571 FAILED
@ -125,5 +125,5 @@ TST.l.json completed, all passed!
TST.w.json completed, all passed!
UNLINK.json completed, all passed!
passed: 893717, failed: 106343, total 89%
completed in 14m 2s
passed: 896112, failed: 103948, total 90%
completed in 15m 7s