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getting closer and closer to the xfb copy loop in panda

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This commit is contained in:
iris
2026-05-13 11:27:28 +02:00
parent fc26f75118
commit 9c3a6789f6
9 changed files with 319 additions and 82 deletions
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core/broadway/instructions.cpp
+21 -4
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@@ -118,12 +118,20 @@ void broadway::stwu(ircolib::u32 instr, mem &mem) {
if (utils::RA(instr) == 0)
ircolib::panic("broadway::stwu with ra == 0");
const ircolib::s32 d = utils::SIMM(instr);
const ircolib::u32 EA = gpr[utils::RA(instr)] + d;
mem.write(EA, gpr[utils::RS(instr)]);
const ircolib::u32 EA = ircolib::s32(gpr[utils::RA(instr)]) + utils::SIMM(instr);
mem.write32(EA, gpr[utils::RS(instr)]);
gpr[utils::RA(instr)] = EA;
}
void broadway::stw(ircolib::u32 instr, mem &mem) {
ircolib::s32 b = gpr[utils::RA(instr)];
if (utils::RA(instr) == 0)
b = 0;
const ircolib::u32 EA = b + utils::SIMM(instr);
mem.write32(EA, gpr[utils::RS(instr)]);
}
void broadway::sth(ircolib::u32 instr, mem &mem) {
ircolib::u32 b = gpr[utils::RA(instr)];
if (utils::RA(instr) == 0)
@@ -132,6 +140,15 @@ void broadway::sth(ircolib::u32 instr, mem &mem) {
const ircolib::s32 d = utils::SIMM(instr);
const ircolib::u32 EA = b + d;
mem.write(EA, ircolib::u16(gpr[utils::RS(instr)]));
mem.write16(EA, ircolib::u16(gpr[utils::RS(instr)]));
}
void broadway::lwz(ircolib::u32 instr, mem &mem) {
ircolib::u32 b = gpr[utils::RA(instr)];
if (utils::RA(instr) == 0)
b = 0;
ircolib::u32 ea = ircolib::s32(b) + utils::SIMM(instr);
gpr[utils::RD(instr)] = mem.read32(ea);
}
} // namespace weee::core