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Made DAA work sufficiently well for the FUSE test.

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This commit is contained in:
Thomas Harte 2017-05-25 22:41:05 -04:00
parent ea0ad9fd87
commit 83ee92af1a
1 changed files with 16 additions and 22 deletions
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38
Processors/Z80/Z80.hpp
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@ -550,6 +550,13 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
const MicroOp *operation = &scheduled_programs_[schedule_programs_read_pointer_][schedule_program_program_counter_];
schedule_program_program_counter_++;
#define set_parity(v) \
parity_overflow_flag_ = v^1;\
parity_overflow_flag_ ^= parity_overflow_flag_ >> 4;\
parity_overflow_flag_ ^= parity_overflow_flag_ << 2;\
parity_overflow_flag_ ^= parity_overflow_flag_ >> 1;\
parity_overflow_flag_ &= Flag::Parity;
switch(operation->type) {
case MicroOp::BusOperation:
if(number_of_cycles_ < operation->machine_cycle.length) { schedule_program_program_counter_--; return; }
@ -583,13 +590,6 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
#pragma mark - Logical
#define set_parity(v) \
parity_overflow_flag_ = v^1;\
parity_overflow_flag_ ^= parity_overflow_flag_ >> 4;\
parity_overflow_flag_ ^= parity_overflow_flag_ << 2;\
parity_overflow_flag_ ^= parity_overflow_flag_ >> 1;\
parity_overflow_flag_ &= Flag::Parity;
case MicroOp::And:
a_ &= *(uint8_t *)operation->source;
sign_result_ = zero_result_ = bit5_result_ = bit3_result_ = a_;
@ -611,8 +611,6 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
set_parity(a_);
break;
#undef set_parity
#pragma mark - Relative jumps
case MicroOp::DJNZ:
@ -769,18 +767,17 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
{
if(half_carry_flag_)
{
amountToAdd = (highNibble > 0x9) ? 0x66 : 0x06;
if(lowNibble > 0x9)
amountToAdd = (highNibble > 0x8) ? 0x66 : 0x06;
else
amountToAdd = (highNibble > 0x9) ? 0x66 : 0x06;
}
else
{
if(lowNibble > 0x9)
{
amountToAdd = (highNibble > 0x8) ? 0x66 : 0x06;
}
else
{
amountToAdd = (highNibble > 0x9) ? 0x60 : 0x00;
}
}
}
@ -799,7 +796,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
if(subtract_flag_)
{
a_ -= amountToAdd;
if(half_carry_flag_ && lowNibble < 0x6) half_carry_flag_ = 0;
half_carry_flag_ = (half_carry_flag_ && lowNibble < 0x6) ? Flag::HalfCarry : 0;
}
else
{
@ -808,14 +805,9 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
}
sign_result_ = zero_result_ = bit3_result_ = bit5_result_ = a_;
uint8_t parity = a_;
parity ^= (parity >> 4);
parity ^= (parity >> 2);
parity ^= (parity >> 1);
parity_overflow_flag_ = (parity & 1) << 3;
} break;
set_parity(a_);
} break;
#pragma mark - 16-bit arithmetic
@ -981,6 +973,8 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
// printf("Unhandled Z80 operation %d\n", operation->type);
return;
}
#undef set_parity
}
}