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Optimize IO in

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Around 36% faster
This commit is contained in:
Adrien Moulin
2022-08-09 19:14:42 +02:00
parent 2a6a061556
commit 26d6b308a9
3 changed files with 48 additions and 32 deletions
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73
src/io.c
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@@ -312,12 +312,14 @@ inb(uint16_t port)
p = q;
}
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10;
else
amstrad_latch = AMSTRAD_SW9;
if (amstrad_latch & 0x80000000) {
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH | 0x80000000;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10 | 0x80000000;
else
amstrad_latch = AMSTRAD_SW9 | 0x80000000;
}
if (!found)
cycles -= io_delay;
@@ -401,12 +403,14 @@ inw(uint16_t port)
}
ret = (ret8[1] << 8) | ret8[0];
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10;
else
amstrad_latch = AMSTRAD_SW9;
if (amstrad_latch & 0x80000000) {
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH | 0x80000000;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10 | 0x80000000;
else
amstrad_latch = AMSTRAD_SW9 | 0x80000000;
}
if (!found)
cycles -= io_delay;
@@ -487,17 +491,26 @@ inl(uint16_t port)
ret16[0] = ret & 0xffff;
ret16[1] = (ret >> 16) & 0xffff;
for (i = 0; i < 4; i += 2) {
p = io[(port + i) & 0xffff];
while(p) {
q = p->next;
if (p->inw && !p->inl) {
ret16[i >> 1] &= p->inw(port + i, p->priv);
found |= 2;
qfound++;
}
p = q;
}
p = io[port & 0xffff];
while (p) {
q = p->next;
if (p->inw && !p->inl) {
ret16[0] &= p->inw(port, p->priv);
found |= 2;
qfound++;
}
p = q;
}
p = io[(port + 2) & 0xffff];
while (p) {
q = p->next;
if (p->inw && !p->inl) {
ret16[1] &= p->inw(port + 2, p->priv);
found |= 2;
qfound++;
}
p = q;
}
ret = (ret16[1] << 16) | ret16[0];
@@ -519,12 +532,14 @@ inl(uint16_t port)
}
ret = (ret8[3] << 24) | (ret8[2] << 16) | (ret8[1] << 8) | ret8[0];
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10;
else
amstrad_latch = AMSTRAD_SW9;
if (amstrad_latch & 0x80000000) {
if (port & 0x80)
amstrad_latch = AMSTRAD_NOLATCH | 0x80000000;
else if (port & 0x4000)
amstrad_latch = AMSTRAD_SW10 | 0x80000000;
else
amstrad_latch = AMSTRAD_SW9 | 0x80000000;
}
if (!found)
cycles -= io_delay;