folkert/KEK
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

micro-opt

Browse source
This commit is contained in:
folkert van heusden 2022-04-13 20:53:54 +02:00
parent 54b9ac8eae
commit a90547c3d1
2 changed files with 11 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
cpu.cpp
View file

@ -146,19 +146,19 @@ void cpu::put_result(const uint16_t a, const uint8_t dst_mode, const uint8_t dst
b->write(a, word_mode, value, false);
}
void cpu::addRegister(const int nr, const bool prev_mode, const uint16_t value)
uint16_t cpu::addRegister(const int nr, const bool prev_mode, const uint16_t value)
{
if (nr < 6)
regs0_5[getBitPSW(11)][nr] += value;
else if (nr == 6) {
return regs0_5[getBitPSW(11)][nr] += value;
if (nr == 6) {
if (prev_mode)
sp[(getPSW() >> 12) & 3] += value;
else
sp[getPSW() >> 14] += value;
}
else {
pc += value;
return sp[(getPSW() >> 12) & 3] += value;
return sp[getPSW() >> 14] += value;
}
return pc += value;
}
bool cpu::getBitPSW(const int bit) const
@ -1324,9 +1324,7 @@ void cpu::pushStack(const uint16_t v)
exit(1);
}
addRegister(6, false, -2);
uint16_t a = getRegister(6, false);
uint16_t a = addRegister(6, false, -2);
b -> writeWord(a, v);
}

2
cpu.h
View file

@ -38,7 +38,7 @@ private:
uint16_t getRegister(const int nr, const bool MF_MT) const;
void setRegister(const int nr, const bool MF_MT, const uint16_t value);
void addRegister(const int nr, const bool MF_MT, const uint16_t value);
uint16_t addRegister(const int nr, const bool MF_MT, const uint16_t value);
uint16_t getGAMAddress(const uint8_t mode, const int reg, const bool word_mode, const bool MF_MT);
uint16_t getGAM(const uint8_t mode, const uint8_t reg, const bool word_mode, const bool MF_MT);