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i should implement DSP DMA...

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This commit is contained in:
iris
2026-05-20 17:55:07 +02:00
parent f9ab690ccd
commit 35f20a16b8
15 changed files with 500 additions and 25 deletions
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core/broadway/instructions.cpp
+119 -5
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@@ -8,6 +8,31 @@ void broadway::add(ircolib::u32 instr) {
cr0_update(instr & 1, gpr[utils::RD(instr)]);
}
void broadway::addc(ircolib::u32 instr) {
ircolib::u32 sum;
bool carry = __builtin_add_overflow(gpr[utils::RA(instr)], gpr[utils::RB(instr)], &sum);
cr0_update(instr & 1, sum);
xer.ca = carry;
gpr[utils::RD(instr)] = sum;
}
void broadway::adde(ircolib::u32 instr) {
ircolib::u32 sum;
bool c0 = __builtin_add_overflow(gpr[utils::RA(instr)], gpr[utils::RB(instr)], &sum);
bool c1 = __builtin_add_overflow(sum, xer.ca, &sum);
cr0_update(instr & 1, sum);
xer.ca = c0 | c1;
gpr[utils::RD(instr)] = sum;
}
void broadway::addze(ircolib::u32 instr) {
ircolib::u32 sum;
bool c1 = __builtin_add_overflow(gpr[utils::RA(instr)], xer.ca, &sum);
cr0_update(instr & 1, sum);
xer.ca = c1;
gpr[utils::RD(instr)] = sum;
}
void broadway::addi(ircolib::u32 instr) {
if (utils::RA(instr) == 0) { // li
gpr[utils::RD(instr)] = ircolib::s32(utils::SIMM(instr));
@@ -17,13 +42,19 @@ void broadway::addi(ircolib::u32 instr) {
gpr[utils::RD(instr)] = gpr[utils::RA(instr)] + (ircolib::s32(utils::SIMM(instr)));
}
void broadway::addicr(ircolib::u32 instr) {
gpr[utils::RD(instr)] = gpr[utils::RA(instr)] + (ircolib::s32(utils::SIMM(instr)));
cr0_update(true, gpr[utils::RD(instr)]);
void broadway::addic(ircolib::u32 instr) {
ircolib::u32 sum;
bool carry = __builtin_add_overflow(gpr[utils::RA(instr)], ircolib::s32(utils::SIMM(instr)), &sum);
gpr[utils::RD(instr)] = sum;
xer.ca = carry;
}
void broadway::addic(ircolib::u32 instr) {
gpr[utils::RD(instr)] = gpr[utils::RA(instr)] + (ircolib::s32(utils::SIMM(instr)));
void broadway::addicr(ircolib::u32 instr) {
ircolib::u32 sum;
bool carry = __builtin_add_overflow(gpr[utils::RA(instr)], ircolib::s32(utils::SIMM(instr)), &sum);
cr0_update(true, sum);
gpr[utils::RD(instr)] = sum;
xer.ca = carry;
}
void broadway::addis(ircolib::u32 instr) {
@@ -167,6 +198,22 @@ void broadway::stwu(ircolib::u32 instr, mem &mem) {
});
}
void broadway::sthu(ircolib::u32 instr, mem &mem) {
if (utils::RA(instr) == 0)
ircolib::panic("broadway::sthu with ra == 0");
const ircolib::u32 EA = ircolib::s32(gpr[utils::RA(instr)]) + utils::SIMM(instr);
auto _ = mem.write16(EA, gpr[utils::RS(instr)])
.and_then([&] {
gpr[utils::RA(instr)] = EA;
return std::expected<void, std::string>();
})
.or_else([&](std::string e) {
ircolib::panic("sthu broadway write failed. Reason: {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<void, std::string>();
});
}
void broadway::stbu(ircolib::u32 instr, mem &mem) {
if (utils::RA(instr) == 0)
ircolib::panic("broadway::stbu with ra == 0");
@@ -288,6 +335,22 @@ void broadway::lhz(ircolib::u32 instr, mem &mem) {
.value();
}
void broadway::lhzx(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) + gpr[utils::RB(instr)];
gpr[utils::RD(instr)] = mem.read16(ea)
.and_then([&](ircolib::u32 val) { return std::expected<ircolib::u32, std::string>(val); })
.or_else([&](std::string e) {
ircolib::panic("lhzx broadway read failed. Reason {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<ircolib::u32, std::string>();
})
.value();
}
void broadway::lbz(ircolib::u32 instr, mem &mem) {
ircolib::u32 b = gpr[utils::RA(instr)];
if (utils::RA(instr) == 0)
@@ -505,11 +568,39 @@ void broadway::subf(ircolib::u32 instr) {
cr0_update(instr & 1, gpr[utils::RD(instr)]);
}
void broadway::subfc(ircolib::u32 instr) {
ircolib::u32 sum;
bool c0 = __builtin_add_overflow(~gpr[utils::RA(instr)], 1, &sum);
bool c1 = __builtin_add_overflow(sum, gpr[utils::RB(instr)], &sum);
cr0_update(instr & 1, sum);
xer.ca = !c0 | c1;
gpr[utils::RD(instr)] = sum;
}
void broadway::subfic(ircolib::u32 instr) {
ircolib::u32 sum;
bool c0 = __builtin_add_overflow(~gpr[utils::RA(instr)], 1, &sum);
bool c1 = __builtin_add_overflow(sum, utils::SIMM(instr), &sum);
xer.ca = !c0 | c1;
gpr[utils::RD(instr)] = sum;
}
void broadway::subfe(ircolib::u32 instr) {
ircolib::u32 sum;
bool c0 = __builtin_add_overflow(~gpr[utils::RA(instr)], gpr[utils::RB(instr)], &sum);
bool c1 = __builtin_add_overflow(sum, xer.ca, &sum);
cr0_update(instr & 1, sum);
xer.ca = c0 | c1;
gpr[utils::RD(instr)] = sum;
}
void broadway:: or (ircolib::u32 instr) {
gpr[utils::RA(instr)] = gpr[utils::RS(instr)] | gpr[utils::RB(instr)];
cr0_update(instr & 1, gpr[utils::RA(instr)]);
}
void broadway::xori(ircolib::u32 instr) { gpr[utils::RA(instr)] = gpr[utils::RS(instr)] ^ utils::UIMM(instr); }
void broadway::mullw(ircolib::u32 instr) {
gpr[utils::RD(instr)] = ircolib::u64(gpr[utils::RA(instr)]) * ircolib::u64(gpr[utils::RB(instr)]);
}
@@ -543,4 +634,27 @@ void broadway::divwu(ircolib::u32 instr) {
gpr[utils::RD(instr)] = dividend / divisor;
cr0_update(instr & 1, gpr[utils::RD(instr)]);
}
void broadway::mftb(ircolib::u32 instr) {
const ircolib::u32 tbr = (instr >> 11) & 0x3FF;
if (tbr != 392 && tbr != 424)
ircolib::panic("broadway::mftb with tbr != 268 && != 269 ({})", tbr);
if (tbr == 392)
gpr[utils::RD(instr)] = tbl;
if (tbr == 424)
gpr[utils::RD(instr)] = tbu;
}
void broadway::sraw(ircolib::u32 instr) {
ircolib::u8 shift = std::min(gpr[utils::RB(instr)] & 0x3f, ircolib::u32(31));
ircolib::s32 rs = gpr[utils::RS(instr)];
ircolib::s32 result = rs >> shift;
ircolib::u32 mask = (1 << shift) - 1;
cr0_update(instr & 1, result);
xer.ca = (rs < 0) & ((ircolib::u32(rs) & mask) != 0);
gpr[utils::RA(instr)] = result;
}
} // namespace weee::core