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CPU/Recompiler/ARM: Optimize icache check

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This commit is contained in:
Connor McLaughlin 2021-07-23 22:59:24 +10:00
parent e2db78b0ef
commit 5ff9783626
3 changed files with 86 additions and 1 deletions
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42
src/core/cpu_recompiler_code_generator_aarch32.cpp
View file

@ -1749,6 +1749,48 @@ void CodeGenerator::EmitCancelInterpreterLoadDelayForReg(Reg reg)
m_emit->Bind(&skip_cancel);
}
void CodeGenerator::EmitICacheCheckAndUpdate()
{
if (GetSegmentForAddress(m_pc) >= Segment::KSEG1)
{
EmitAddCPUStructField(offsetof(State, pending_ticks), Value::FromConstantU32(static_cast<u32>(m_block->uncached_fetch_ticks)));
}
else
{
const auto& ticks_reg = a32::r0;
const auto& current_tag_reg = a32::r1;
const auto& existing_tag_reg = a32::r2;
VirtualMemoryAddress current_pc = m_pc & ICACHE_TAG_ADDRESS_MASK;
m_emit->ldr(ticks_reg, a32::MemOperand(GetCPUPtrReg(), offsetof(State, pending_ticks)));
m_emit->Mov(current_tag_reg, current_pc);
for (u32 i = 0; i < m_block->icache_line_count; i++, current_pc += ICACHE_LINE_SIZE)
{
const TickCount fill_ticks = GetICacheFillTicks(current_pc);
if (fill_ticks <= 0)
continue;
const u32 line = GetICacheLine(current_pc);
const u32 offset = offsetof(State, icache_tags) + (line * sizeof(u32));
a32::Label cache_hit;
m_emit->ldr(existing_tag_reg, a32::MemOperand(GetCPUPtrReg(), offset));
m_emit->cmp(existing_tag_reg, current_tag_reg);
m_emit->B(a32::eq, &cache_hit);
m_emit->str(current_tag_reg, a32::MemOperand(GetCPUPtrReg(), offset));
EmitAdd(0, 0, Value::FromConstantU32(static_cast<u32>(fill_ticks)), false);
m_emit->Bind(&cache_hit);
if (i != (m_block->icache_line_count - 1))
m_emit->add(current_tag_reg, current_tag_reg, ICACHE_LINE_SIZE);
}
m_emit->str(ticks_reg, a32::MemOperand(GetCPUPtrReg(), offsetof(State, pending_ticks)));
}
}
void CodeGenerator::EmitStallUntilGTEComplete()
{
static_assert(offsetof(State, pending_ticks) + sizeof(u32) == offsetof(State, gte_completion_tick));

43
src/core/cpu_recompiler_code_generator_aarch64.cpp
View file

@ -1936,6 +1936,49 @@ void CodeGenerator::EmitCancelInterpreterLoadDelayForReg(Reg reg)
m_emit->Bind(&skip_cancel);
}
void CodeGenerator::EmitICacheCheckAndUpdate()
{
if (GetSegmentForAddress(m_pc) >= Segment::KSEG1)
{
EmitAddCPUStructField(offsetof(State, pending_ticks),
Value::FromConstantU32(static_cast<u32>(m_block->uncached_fetch_ticks)));
}
else
{
const auto& ticks_reg = a64::w0;
const auto& current_tag_reg = a64::w1;
const auto& existing_tag_reg = a64::w2;
VirtualMemoryAddress current_pc = m_pc & ICACHE_TAG_ADDRESS_MASK;
m_emit->Ldr(ticks_reg, a64::MemOperand(GetCPUPtrReg(), offsetof(State, pending_ticks)));
m_emit->Mov(current_tag_reg, current_pc);
for (u32 i = 0; i < m_block->icache_line_count; i++, current_pc += ICACHE_LINE_SIZE)
{
const TickCount fill_ticks = GetICacheFillTicks(current_pc);
if (fill_ticks <= 0)
continue;
const u32 line = GetICacheLine(current_pc);
const u32 offset = offsetof(State, icache_tags) + (line * sizeof(u32));
a64::Label cache_hit;
m_emit->Ldr(existing_tag_reg, a64::MemOperand(GetCPUPtrReg(), offset));
m_emit->Cmp(existing_tag_reg, current_tag_reg);
m_emit->B(&cache_hit, a64::eq);
m_emit->Str(current_tag_reg, a64::MemOperand(GetCPUPtrReg(), offset));
EmitAdd(0, 0, Value::FromConstantU32(static_cast<u32>(fill_ticks)), false);
m_emit->Bind(&cache_hit);
if (i != (m_block->icache_line_count - 1))
m_emit->Add(current_tag_reg, current_tag_reg, ICACHE_LINE_SIZE);
}
m_emit->Str(ticks_reg, a64::MemOperand(GetCPUPtrReg(), offsetof(State, pending_ticks)));
}
}
void CodeGenerator::EmitStallUntilGTEComplete()
{
static_assert(offsetof(State, pending_ticks) + sizeof(u32) == offsetof(State, gte_completion_tick));

2
src/core/cpu_recompiler_code_generator_generic.cpp
View file

@ -160,7 +160,7 @@ void CodeGenerator::EmitStoreGuestMemory(const CodeBlockInstruction& cbi, const
}
}
#ifndef CPU_X64
#if 0 // Not used
void CodeGenerator::EmitICacheCheckAndUpdate()
{