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Slightly nicer refactoring of the MEMPTR post increment saga

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Signed-off-by: Adrian Conlon <Adrian.conlon@gmail.com>
This commit is contained in:
Adrian Conlon 2018-10-28 13:33:36 +00:00
parent b3faae34ae
commit fc7b6e49ca
1 changed files with 10 additions and 20 deletions
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30
Z80/src/Z80.cpp
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@ -600,8 +600,7 @@ bool EightBit::Z80::otdr() {
}
void EightBit::Z80::rrd() {
MEMPTR() = BUS().ADDRESS() = HL();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = HL())++;
const auto memory = BUS().read();
BUS().write(promoteNibble(A()) | highNibble(memory));
A() = higherNibble(A()) | lowerNibble(memory);
@ -610,8 +609,7 @@ void EightBit::Z80::rrd() {
}
void EightBit::Z80::rld() {
MEMPTR() = BUS().ADDRESS() = HL();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = HL())++;
const auto memory = BUS().read();
BUS().write(promoteNibble(memory) | lowNibble(A()));
A() = higherNibble(A()) | highNibble(memory);
@ -815,8 +813,7 @@ void EightBit::Z80::executeED(const int x, const int y, const int z, const int p
case 1:
switch (z) {
case 0: // Input from port with 16-bit address
MEMPTR() = BUS().ADDRESS() = BC();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = BC())++;
readPort();
if (LIKELY(y != 6)) // IN r[y],(C)
R(y, BUS().DATA());
@ -825,8 +822,7 @@ void EightBit::Z80::executeED(const int x, const int y, const int z, const int p
addCycles(12);
break;
case 1: // Output to port with 16-bit address
MEMPTR() = BUS().ADDRESS() = BC();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = BC())++;
if (UNLIKELY(y == 6)) // OUT (C),0
BUS().DATA() = 0;
else // OUT (C),r[y]
@ -1106,15 +1102,13 @@ void EightBit::Z80::executeOther(const int x, const int y, const int z, const in
case 0:
switch (p) {
case 0: // LD (BC),A
MEMPTR() = BUS().ADDRESS() = BC();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = BC())++;
MEMPTR().high = BUS().DATA() = A();
BUS().write();
addCycles(7);
break;
case 1: // LD (DE),A
MEMPTR() = BUS().ADDRESS() = DE();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = DE())++;
MEMPTR().high = BUS().DATA() = A();
BUS().write();
addCycles(7);
@ -1125,8 +1119,7 @@ void EightBit::Z80::executeOther(const int x, const int y, const int z, const in
addCycles(16);
break;
case 3: // LD (nn),A
MEMPTR() = BUS().ADDRESS() = fetchWord();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = fetchWord())++;
MEMPTR().high = BUS().DATA() = A();
BUS().write();
addCycles(13);
@ -1138,14 +1131,12 @@ void EightBit::Z80::executeOther(const int x, const int y, const int z, const in
case 1:
switch (p) {
case 0: // LD A,(BC)
MEMPTR() = BUS().ADDRESS() = BC();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = BC())++;
A() = BUS().read();
addCycles(7);
break;
case 1: // LD A,(DE)
MEMPTR() = BUS().ADDRESS() = DE();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = DE())++;
A() = BUS().read();
addCycles(7);
break;
@ -1155,8 +1146,7 @@ void EightBit::Z80::executeOther(const int x, const int y, const int z, const in
addCycles(16);
break;
case 3: // LD A,(nn)
MEMPTR() = BUS().ADDRESS() = fetchWord();
++MEMPTR();
(MEMPTR() = BUS().ADDRESS() = fetchWord())++;
A() = BUS().read();
addCycles(13);
break;