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Correct GB: SWAP r operation. The demoted high nibble was being effectively zeroed each time.

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Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
This commit is contained in:
Adrian.Conlon 2017-08-13 21:34:19 +01:00
parent c10dced63e
commit fb13d9fdce
1 changed files with 1 additions and 1 deletions
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2
LR35902/src/LR35902.cpp
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@ -342,7 +342,7 @@ void EightBit::LR35902::ccf(uint8_t& a, uint8_t& f) {
uint8_t EightBit::LR35902::swap(uint8_t& f, uint8_t operand) {
auto low = lowNibble(operand);
auto high = highNibble(operand);
operand = promoteNibble(low) | demoteNibble(high);
operand = promoteNibble(low) | high;
adjustZero<LR35902>(f, operand);
clearFlag(f, NF | HC | CF);
return operand;