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PSW magic
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Folkert van Heusden 2025-04-09 08:52:59 +02:00
parent fc7de5a9da
commit 9faba4a2b6
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 7 additions and 3 deletions
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10
cpu.cpp
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@ -316,10 +316,14 @@ int cpu::getPSW_spl() const
void cpu::setPSW(const uint16_t v, const bool limited)
{
if (limited)
psw = (psw & 0174340) | (v & 037);
else
if (limited) {
int cur_mode = std::max( v >> 14, psw >> 14);
int prev_mode = std::max((v >> 12) & 3, (psw >> 12) & 3);
psw = (psw & 004340) | (v & 037) | (cur_mode << 14) | (prev_mode << 12);
}
else {
psw = v & 0174377; // mask off reserved bits
}
}
void cpu::setPSW_flags_nzv(const uint16_t value, const word_mode_t word_mode)