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Implements support for the trace flag.

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This commit is contained in:
Thomas Harte 2019-04-29 19:02:59 -04:00
parent d6e16d0042
commit 3e34ae67f6
1 changed files with 40 additions and 34 deletions
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74
Processors/68000/Implementation/68000Implementation.hpp
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@ -120,43 +120,49 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
// Either the micro-operations for this instruction have been exhausted, or
// no instruction was ongoing. Either way, do a standard instruction operation.
// TODO: unless an interrupt is pending, or the trap flag is set.
#ifdef LOG_TRACE
std::cout << std::setfill('0');
std::cout << (extend_flag_ ? 'x' : '-') << (negative_flag_ ? 'n' : '-') << (zero_result_ ? '-' : 'z');
std::cout << (overflow_flag_ ? 'v' : '-') << (carry_flag_ ? 'c' : '-') << '\t';
for(int c = 0; c < 8; ++ c) std::cout << "d" << c << ":" << std::setw(8) << data_[c].full << " ";
for(int c = 0; c < 8; ++ c) std::cout << "a" << c << ":" << std::setw(8) << address_[c].full << " ";
if(is_supervisor_) {
std::cout << "usp:" << std::setw(8) << std::setfill('0') << stack_pointers_[0].full << " ";
} else {
std::cout << "ssp:" << std::setw(8) << std::setfill('0') << stack_pointers_[1].full << " ";
}
std::cout << '\n';
#endif
decoded_instruction_ = prefetch_queue_.halves.high.full;
#ifdef LOG_TRACE
std::cout << std::hex << (program_counter_.full - 4) << ": " << std::setw(4) << decoded_instruction_ << '\t';
#endif
if(signal_will_perform) {
bus_handler_.will_perform(program_counter_.full - 4, decoded_instruction_);
}
if(instructions[decoded_instruction_].micro_operations) {
active_program_ = &instructions[decoded_instruction_];
active_micro_op_ = active_program_->micro_operations;
} else {
// TODO: is an interrupt pending?
if(trace_flag_) {
active_program_ = nullptr;
active_micro_op_ = exception_micro_ops_;
populate_trap_steps(9, get_status());
} else {
#ifdef LOG_TRACE
std::cout << std::setfill('0');
std::cout << (extend_flag_ ? 'x' : '-') << (negative_flag_ ? 'n' : '-') << (zero_result_ ? '-' : 'z');
std::cout << (overflow_flag_ ? 'v' : '-') << (carry_flag_ ? 'c' : '-') << '\t';
for(int c = 0; c < 8; ++ c) std::cout << "d" << c << ":" << std::setw(8) << data_[c].full << " ";
for(int c = 0; c < 8; ++ c) std::cout << "a" << c << ":" << std::setw(8) << address_[c].full << " ";
if(is_supervisor_) {
std::cout << "usp:" << std::setw(8) << std::setfill('0') << stack_pointers_[0].full << " ";
} else {
std::cout << "ssp:" << std::setw(8) << std::setfill('0') << stack_pointers_[1].full << " ";
}
std::cout << '\n';
#endif
// The vector used depends on whether this is a vanilla unrecognised instruction,
// or one on the A or F lines.
switch(decoded_instruction_ >> 12) {
default: populate_trap_steps(4, get_status()); break;
case 0xa: populate_trap_steps(10, get_status()); break;
case 0xf: populate_trap_steps(11, get_status()); break;
decoded_instruction_ = prefetch_queue_.halves.high.full;
#ifdef LOG_TRACE
std::cout << std::hex << (program_counter_.full - 4) << ": " << std::setw(4) << decoded_instruction_ << '\t';
#endif
if(signal_will_perform) {
bus_handler_.will_perform(program_counter_.full - 4, decoded_instruction_);
}
if(instructions[decoded_instruction_].micro_operations) {
active_program_ = &instructions[decoded_instruction_];
active_micro_op_ = active_program_->micro_operations;
} else {
active_program_ = nullptr;
active_micro_op_ = exception_micro_ops_;
// The vector used depends on whether this is a vanilla unrecognised instruction,
// or one on the A or F lines.
switch(decoded_instruction_ >> 12) {
default: populate_trap_steps(4, get_status()); break;
case 0xa: populate_trap_steps(10, get_status()); break;
case 0xf: populate_trap_steps(11, get_status()); break;
}
}
}
}