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Removing dirty page table hack.

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This commit is contained in:
Ben Vanik
2014-12-19 17:29:27 -08:00
parent 71fab4bbb7
commit 756cfbb484
11 changed files with 5 additions and 113 deletions
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1
src/alloy/backend/ivm/ivm_function.cc
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@@ -120,7 +120,6 @@ int IVMFunction::CallImpl(ThreadState* thread_state, uint64_t return_address) {
ics.locals = local_stack;
ics.context = (uint8_t*)thread_state->raw_context();
ics.membase = memory->membase();
ics.page_table = ics.membase + memory->page_table();
ics.did_carry = 0;
ics.did_saturate = 0;
ics.thread_state = thread_state;

13
src/alloy/backend/ivm/ivm_intcode.cc
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@@ -1467,12 +1467,6 @@ int Translate_LOAD(TranslationContext& ctx, Instr* i) {
return DispatchToC(ctx, i, fns[i->dest->type]);
}
void MarkPageDirty(IntCodeState& ics, uint32_t address) {
// 16KB pages.
if (ics.page_table) {
ics.page_table[(address >> 14) & 0x7FFF] = 1;
}
}
uint32_t IntCode_STORE_I8(IntCodeState& ics, const IntCode* i) {
uint32_t address = ics.rf[i->src1_reg].u32;
if (DYNAMIC_REGISTER_ACCESS_CHECK(address)) {
@@ -1483,7 +1477,6 @@ uint32_t IntCode_STORE_I8(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u8);
DFLUSH();
*((int8_t*)(ics.membase + address)) = ics.rf[i->src2_reg].i8;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_I16(IntCodeState& ics, const IntCode* i) {
@@ -1497,7 +1490,6 @@ uint32_t IntCode_STORE_I16(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u16);
DFLUSH();
*((int16_t*)(ics.membase + address)) = ics.rf[i->src2_reg].i16;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_I32(IntCodeState& ics, const IntCode* i) {
@@ -1511,7 +1503,6 @@ uint32_t IntCode_STORE_I32(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u32);
DFLUSH();
*((int32_t*)(ics.membase + address)) = ics.rf[i->src2_reg].i32;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_I64(IntCodeState& ics, const IntCode* i) {
@@ -1525,7 +1516,6 @@ uint32_t IntCode_STORE_I64(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u64);
DFLUSH();
*((int64_t*)(ics.membase + address)) = ics.rf[i->src2_reg].i64;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_F32(IntCodeState& ics, const IntCode* i) {
@@ -1534,7 +1524,6 @@ uint32_t IntCode_STORE_F32(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u32);
DFLUSH();
*((float*)(ics.membase + address)) = ics.rf[i->src2_reg].f32;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_F64(IntCodeState& ics, const IntCode* i) {
@@ -1543,7 +1532,6 @@ uint32_t IntCode_STORE_F64(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].u64);
DFLUSH();
*((double*)(ics.membase + address)) = ics.rf[i->src2_reg].f64;
MarkPageDirty(ics, address);
return IA_NEXT;
}
uint32_t IntCode_STORE_V128(IntCodeState& ics, const IntCode* i) {
@@ -1555,7 +1543,6 @@ uint32_t IntCode_STORE_V128(IntCodeState& ics, const IntCode* i) {
ics.rf[i->src2_reg].v128.uz, ics.rf[i->src2_reg].v128.uw);
DFLUSH();
*((vec128_t*)(ics.membase + address)) = ics.rf[i->src2_reg].v128;
MarkPageDirty(ics, address);
return IA_NEXT;
}
int Translate_STORE(TranslationContext& ctx, Instr* i) {

1
src/alloy/backend/ivm/ivm_intcode.h
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@@ -42,7 +42,6 @@ typedef struct {
uint8_t* locals;
uint8_t* context;
uint8_t* membase;
uint8_t* page_table;
int8_t did_carry;
int8_t did_saturate;
runtime::ThreadState* thread_state;

5
src/alloy/backend/x64/x64_emitter.cc
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@@ -749,11 +749,6 @@ void X64Emitter::StoreEflags() {
#endif // STORE_EFLAGS
}
uint32_t X64Emitter::page_table_address() const {
uint64_t addr = runtime_->memory()->page_table();
return static_cast<uint32_t>(addr);
}
bool X64Emitter::ConstantFitsIn32Reg(uint64_t v) {
if ((v & ~0x7FFFFFFF) == 0) {
// Fits under 31 bits, so just load using normal mov.

2
src/alloy/backend/x64/x64_emitter.h
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@@ -163,8 +163,6 @@ class X64Emitter : public Xbyak::CodeGenerator {
void LoadEflags();
void StoreEflags();
uint32_t page_table_address() const;
// Moves a 64bit immediate into memory.
bool ConstantFitsIn32Reg(uint64_t v);
void MovMem64(const Xbyak::RegExp& addr, uint64_t v);

16
src/alloy/backend/x64/x64_sequences.cc
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@@ -1539,15 +1539,6 @@ EMITTER_OPCODE_TABLE(
// OPCODE_STORE
// ============================================================================
// Note: most *should* be aligned, but needs to be checked!
void EmitMarkPageDirty(X64Emitter& e, RegExp& addr) {
// 16KB pages.
auto page_table_address = e.page_table_address();
if (page_table_address) {
e.shr(e.eax, 14);
e.and(e.eax, 0x7FFF);
e.mov(e.byte[e.rdx + e.rax + page_table_address], 1);
}
}
EMITTER(STORE_I8, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
auto addr = ComputeMemoryAddress(e, i.src1);
@@ -1556,7 +1547,6 @@ EMITTER(STORE_I8, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I8<>>)) {
} else {
e.mov(e.byte[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8b, e.byte[addr]);
@@ -1573,7 +1563,6 @@ EMITTER(STORE_I16, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I16<>>)) {
} else {
e.mov(e.word[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8w, e.word[addr]);
@@ -1590,7 +1579,6 @@ EMITTER(STORE_I32, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I32<>>)) {
} else {
e.mov(e.dword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8d, e.dword[addr]);
@@ -1607,7 +1595,6 @@ EMITTER(STORE_I64, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I64<>>)) {
} else {
e.mov(e.qword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8, e.qword[addr]);
@@ -1624,7 +1611,6 @@ EMITTER(STORE_F32, MATCH(I<OPCODE_STORE, VoidOp, I64<>, F32<>>)) {
} else {
e.vmovss(e.dword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);
@@ -1641,7 +1627,6 @@ EMITTER(STORE_F64, MATCH(I<OPCODE_STORE, VoidOp, I64<>, F64<>>)) {
} else {
e.vmovsd(e.qword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);
@@ -1659,7 +1644,6 @@ EMITTER(STORE_V128, MATCH(I<OPCODE_STORE, VoidOp, I64<>, V128<>>)) {
} else {
e.vmovaps(e.ptr[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);

5
src/alloy/memory.h
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@@ -27,9 +27,6 @@ class Memory {
inline uint64_t* reserve_address() { return &reserve_address_; }
inline uint64_t* reserve_value() { return &reserve_value_; }
// TODO(benvanik): remove with GPU refactor.
virtual uint64_t page_table() const = 0;
uint64_t trace_base() const { return trace_base_; }
void set_trace_base(uint64_t value) { trace_base_ = value; }
@@ -66,8 +63,6 @@ class SimpleMemory : public Memory {
SimpleMemory(size_t capacity);
~SimpleMemory() override;
uint64_t page_table() const override { return 0; }
// TODO(benvanik): remove with IVM.
uint8_t LoadI8(uint64_t address) override;
uint16_t LoadI16(uint64_t address) override;