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This commit is contained in:
iris
2026-05-19 00:04:56 +02:00
parent b50e0a529d
commit 59b6c70c3f
1 changed files with 40 additions and 24 deletions
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core/broadway/instructions.cpp
+40 -24
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@@ -3,10 +3,13 @@
#include <mem.hpp>
namespace weee::core {
void broadway::add(ircolib::u32 instr) { gpr[utils::RD(instr)] = gpr[utils::RA(instr)] + gpr[utils::RB(instr)]; }
void broadway::add(ircolib::u32 instr) {
gpr[utils::RD(instr)] = gpr[utils::RA(instr)] + gpr[utils::RB(instr)];
cr0_update(instr & 1, gpr[utils::RD(instr)]);
}
void broadway::addi(ircolib::u32 instr) {
if (utils::RA(instr) == 0) { // lis
if (utils::RA(instr) == 0) { // li
gpr[utils::RD(instr)] = ircolib::s32(utils::SIMM(instr));
return;
}
@@ -145,12 +148,14 @@ void broadway::stwu(ircolib::u32 instr, mem &mem) {
const ircolib::u32 EA = ircolib::s32(gpr[utils::RA(instr)]) + utils::SIMM(instr);
auto _ = mem.write32(EA, gpr[utils::RS(instr)])
.and_then([&] { return std::expected<void, std::string>(); })
.and_then([&] {
gpr[utils::RA(instr)] = EA;
return std::expected<void, std::string>();
})
.or_else([&](std::string e) {
ircolib::panic("stwu broadway write failed. Reason: {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<void, std::string>();
});
gpr[utils::RA(instr)] = EA;
}
void broadway::stbu(ircolib::u32 instr, mem &mem) {
@@ -159,12 +164,14 @@ void broadway::stbu(ircolib::u32 instr, mem &mem) {
const ircolib::u32 EA = ircolib::s32(gpr[utils::RA(instr)]) + utils::SIMM(instr);
auto _ = mem.write8(EA, gpr[utils::RS(instr)])
.and_then([&] { return std::expected<void, std::string>(); })
.and_then([&] {
gpr[utils::RA(instr)] = EA;
return std::expected<void, std::string>();
})
.or_else([&](std::string e) {
ircolib::panic("stbu broadway write failed. Reason: {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<void, std::string>();
});
gpr[utils::RA(instr)] = EA;
}
void broadway::stw(ircolib::u32 instr, mem &mem) {
@@ -186,8 +193,7 @@ void broadway::sth(ircolib::u32 instr, mem &mem) {
if (utils::RA(instr) == 0)
b = 0;
const ircolib::s32 d = utils::SIMM(instr);
const ircolib::u32 EA = b + d;
const ircolib::u32 EA = b + utils::SIMM(instr);
auto _ = mem.write16(EA, ircolib::u16(gpr[utils::RS(instr)]))
.and_then([&] { return std::expected<void, std::string>(); })
@@ -219,16 +225,15 @@ void broadway::lfd(ircolib::u32 instr, mem &mem) {
b = 0;
ircolib::u32 ea = ircolib::s32(b) + utils::SIMM(instr);
double val;
ircolib::u64 read = mem.read64(ea)
.and_then([&](ircolib::u64 val) { return std::expected<ircolib::u64, std::string>(val); })
.or_else([&](std::string e) {
ircolib::panic("broadway read failed. Reason {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<ircolib::u64, std::string>();
})
.value();
memcpy(&val, &read, 8);
fgrs[utils::RD(instr)].ps0 = val;
fgrs[utils::RD(instr)].ps0 =
mem.read64(ea)
.and_then([&](ircolib::u64 val) { return std::expected<ircolib::u64, std::string>(val); })
.or_else([&](std::string e) {
ircolib::panic("broadway read failed. Reason {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<ircolib::u64, std::string>();
})
.value();
}
void broadway::bclrx(ircolib::u32 instr) {
@@ -305,9 +310,15 @@ void broadway::rlwinm(ircolib::u32 instr) {
ircolib::u32 r = std::rotl(gpr[utils::RS(instr)], sh);
const ircolib::u8 mb = (instr >> 6) & 0x1f;
const ircolib::u8 me = (instr >> 1) & 0x1f;
const ircolib::u32 start = 0xffffffff >> mb;
const ircolib::u32 end = 0x7fffffff >> me;
ircolib::u32 mask = start ^ end;
if (mb > me)
mask = ~mask;
r &= ~((0xFFFF'FFFF >> mb) << me);
r &= mask;
gpr[utils::RA(instr)] = r;
cr0_update(instr & 1, r);
}
void broadway::lwzu(ircolib::u32 instr, mem &mem) {
@@ -316,16 +327,21 @@ void broadway::lwzu(ircolib::u32 instr, mem &mem) {
const ircolib::u32 EA = ircolib::s32(gpr[utils::RA(instr)]) + utils::SIMM(instr);
gpr[utils::RD(instr)] = mem.read32(EA)
.and_then([&](ircolib::u32 val) { return std::expected<ircolib::u32, std::string>(val); })
.and_then([&](ircolib::u32 val) {
gpr[utils::RA(instr)] = EA;
return std::expected<ircolib::u32, std::string>(val);
})
.or_else([&](std::string e) {
ircolib::panic("broadway read failed. Reason {} (pc: 0x{:08X})", e, pc - 4);
return std::expected<ircolib::u32, std::string>();
})
.value();
gpr[utils::RA(instr)] = EA;
}
void broadway::rfi(ircolib::u32 instr) { pc = srr0; }
void broadway::rfi(ircolib::u32 instr) {
pc = srr0;
ircolib::clear_bit(msr, 13);
}
void broadway::andi(ircolib::u32 instr) {
const ircolib::s32 result = gpr[utils::RS(instr)] & utils::UIMM(instr);
@@ -370,12 +386,12 @@ void broadway::nand(ircolib::u32 instr) {
}
void broadway::subf(ircolib::u32 instr) {
gpr[utils::RD(instr)] = ~(gpr[utils::RA(instr)] + gpr[utils::RB(instr)] + 1);
gpr[utils::RD(instr)] = ~gpr[utils::RA(instr)] + gpr[utils::RB(instr)];
cr0_update(instr & 1, gpr[utils::RD(instr)]);
}
void broadway:: or (ircolib::u32 instr) {
gpr[utils::RA(instr)] = gpr[utils::RS(instr)] & gpr[utils::RB(instr)];
gpr[utils::RA(instr)] = gpr[utils::RS(instr)] | gpr[utils::RB(instr)];
cr0_update(instr & 1, gpr[utils::RA(instr)]);
}
} // namespace weee::core