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backend/arm64: Initial implementation of terminals

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This commit is contained in:
Merry 2022-07-20 21:47:44 +01:00 committed by merry
parent 80c89401b9
commit 00ad84b7ab
4 changed files with 134 additions and 14 deletions
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5
src/dynarmic/backend/arm64/a32_address_space.cpp
View file

@ -112,7 +112,10 @@ EmittedBlockInfo A32AddressSpace::Emit(IR::Block block) {
mem.unprotect();
EmittedBlockInfo block_info = EmitArm64(code, std::move(block), {});
EmittedBlockInfo block_info = EmitArm64(code, std::move(block), {
.enable_cycle_counting = conf.enable_cycle_counting,
.always_little_endian = conf.always_little_endian,
});
Link(block_info);
mem.protect();

26
src/dynarmic/backend/arm64/emit_arm64.cpp
View file

@ -93,19 +93,27 @@ EmittedBlockInfo EmitArm64(oaknut::CodeGenerator& code, IR::Block block, const E
reg_alloc.AssertNoMoreUses();
// TODO: Add Cycles
if (emit_conf.enable_cycle_counting) {
const size_t cycles_to_add = block.CycleCount();
code.LDR(Xscratch0, SP, offsetof(StackLayout, cycles_remaining));
if (oaknut::AddSubImm::is_valid(cycles_to_add)) {
code.SUBS(Xscratch0, Xscratch0, cycles_to_add);
} else {
code.MOV(Xscratch1, cycles_to_add);
code.SUBS(Xscratch0, Xscratch0, Xscratch1);
}
code.STR(Xscratch0, SP, offsetof(StackLayout, cycles_remaining));
}
// TODO: Emit Terminal
const auto term = block.GetTerminal();
const IR::Term::LinkBlock* link_block_term = boost::get<IR::Term::LinkBlock>(&term);
ASSERT(link_block_term);
code.MOV(Xscratch0, link_block_term->next.Value());
code.STUR(Xscratch0, Xstate, offsetof(A32JitState, regs) + sizeof(u32) * 15);
ebi.relocations.emplace_back(Relocation{code.ptr<CodePtr>() - ebi.entry_point, LinkTarget::ReturnFromRunCode});
code.NOP();
EmitA32Terminal(code, ctx);
ebi.size = code.ptr<CodePtr>() - ebi.entry_point;
return ebi;
}
void EmitRelocation(oaknut::CodeGenerator& code, EmitContext& ctx, LinkTarget link_target) {
ctx.ebi.relocations.emplace_back(Relocation{code.ptr<CodePtr>() - ctx.ebi.entry_point, link_target});
code.NOP();
}
} // namespace Dynarmic::Backend::Arm64

15
src/dynarmic/backend/arm64/emit_arm64.h
View file

@ -15,12 +15,14 @@ struct PointerCodeGeneratorPolicy;
template<typename>
class BasicCodeGenerator;
using CodeGenerator = BasicCodeGenerator<PointerCodeGeneratorPolicy>;
struct Label;
} // namespace oaknut
namespace Dynarmic::IR {
class Block;
enum class Opcode;
class Inst;
enum class Cond;
enum class Opcode;
} // namespace Dynarmic::IR
namespace Dynarmic::Backend::Arm64 {
@ -43,13 +45,18 @@ struct EmittedBlockInfo {
};
struct EmitConfig {
bool enable_cycle_counting;
bool always_little_endian;
};
struct EmitContext;
template<IR::Opcode op>
void EmitIR(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst);
EmittedBlockInfo EmitArm64(oaknut::CodeGenerator& code, IR::Block block, const EmitConfig& emit_conf);
template<IR::Opcode op>
void EmitIR(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst);
void EmitRelocation(oaknut::CodeGenerator& code, EmitContext& ctx, LinkTarget link_target);
oaknut::Label EmitA32Cond(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Cond cond);
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx);
} // namespace Dynarmic::Backend::Arm64

102
src/dynarmic/backend/arm64/emit_arm64_a32.cpp
View file

@ -19,6 +19,108 @@ namespace Dynarmic::Backend::Arm64 {
using namespace oaknut::util;
oaknut::Label EmitA32Cond(oaknut::CodeGenerator& code, EmitContext&, IR::Cond cond) {
oaknut::Label pass;
// TODO: Flags in host flags
code.LDR(Wscratch0, Xstate, offsetof(A32JitState, cpsr_nzcv));
code.MSR(static_cast<oaknut::SystemReg>(0b11'011'0100'0010'000), Xscratch0);
code.B(static_cast<oaknut::Cond>(cond), pass);
return pass;
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::Terminal terminal, IR::LocationDescriptor initial_location, bool is_single_step);
void EmitA32Terminal(oaknut::CodeGenerator&, EmitContext&, IR::Term::Interpret, IR::LocationDescriptor, bool) {
ASSERT_FALSE("Interpret should never be emitted.");
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::ReturnToDispatch, IR::LocationDescriptor, bool) {
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
}
void EmitSetUpperLocationDescriptor(oaknut::CodeGenerator& code, EmitContext& ctx, IR::LocationDescriptor new_location, IR::LocationDescriptor old_location) {
auto get_upper = [](const IR::LocationDescriptor& desc) -> u32 {
return static_cast<u32>(A32::LocationDescriptor{desc}.SetSingleStepping(false).UniqueHash() >> 32);
};
const u32 old_upper = get_upper(old_location);
const u32 new_upper = [&] {
const u32 mask = ~u32(ctx.emit_conf.always_little_endian ? 0x2 : 0);
return get_upper(new_location) & mask;
}();
if (old_upper != new_upper) {
code.MOV(Xscratch0, new_upper);
code.STR(Xscratch0, Xstate, offsetof(A32JitState, upper_location_descriptor));
}
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::LinkBlock terminal, IR::LocationDescriptor initial_location, bool) {
EmitSetUpperLocationDescriptor(code, ctx, terminal.next, initial_location);
code.MOV(Xscratch0, terminal.next.Value());
code.STUR(Xscratch0, Xstate, offsetof(A32JitState, regs) + sizeof(u32) * 15);
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
// TODO: Implement LinkBlock optimization
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::LinkBlockFast terminal, IR::LocationDescriptor initial_location, bool) {
EmitSetUpperLocationDescriptor(code, ctx, terminal.next, initial_location);
code.MOV(Xscratch0, terminal.next.Value());
code.STUR(Xscratch0, Xstate, offsetof(A32JitState, regs) + sizeof(u32) * 15);
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
// TODO: Implement LinkBlockFast optimization
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::PopRSBHint, IR::LocationDescriptor, bool) {
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
// TODO: Implement PopRSBHint optimization
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::FastDispatchHint, IR::LocationDescriptor, bool) {
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
// TODO: Implement FastDispatchHint optimization
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::If terminal, IR::LocationDescriptor initial_location, bool is_single_step) {
oaknut::Label pass = EmitA32Cond(code, ctx, terminal.if_);
EmitA32Terminal(code, ctx, terminal.else_, initial_location, is_single_step);
code.l(pass);
EmitA32Terminal(code, ctx, terminal.then_, initial_location, is_single_step);
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::CheckBit terminal, IR::LocationDescriptor initial_location, bool is_single_step) {
oaknut::Label fail;
code.LDRB(Wscratch0, Xstate, offsetof(StackLayout, check_bit));
code.CBZ(Wscratch0, fail);
EmitA32Terminal(code, ctx, terminal.then_, initial_location, is_single_step);
code.l(fail);
EmitA32Terminal(code, ctx, terminal.else_, initial_location, is_single_step);
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location, bool is_single_step) {
oaknut::Label fail;
code.LDAR(Wscratch0, Xhalt);
code.CBNZ(Wscratch0, fail);
EmitA32Terminal(code, ctx, terminal.else_, initial_location, is_single_step);
code.l(fail);
EmitRelocation(code, ctx, LinkTarget::ReturnFromRunCode);
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Term::Terminal terminal, IR::LocationDescriptor initial_location, bool is_single_step) {
boost::apply_visitor([&](const auto& t) { EmitA32Terminal(code, ctx, t, initial_location, is_single_step); }, terminal);
}
void EmitA32Terminal(oaknut::CodeGenerator& code, EmitContext& ctx) {
const A32::LocationDescriptor location{ctx.block.Location()};
EmitA32Terminal(code, ctx, ctx.block.GetTerminal(), location.SetSingleStepping(false), location.SingleStepping());
}
template<>
void EmitIR<IR::Opcode::A32GetRegister>(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) {
const A32::Reg reg = inst->GetArg(0).GetA32RegRef();