Duckstation/src/common/jit_code_buffer.h
Connor McLaughlin b6f871d2b9
JIT optimizations and refactoring (#675)
* CPU/Recompiler: Use rel32 call where possible for no-args

* JitCodeBuffer: Support using preallocated buffer

* CPU/Recompiler/AArch64: Use bl instead of blr for short branches

* CPU/CodeCache: Allocate recompiler buffer in program space

This means we don't need 64-bit moves for every call out of the
recompiler.

* GTE: Don't store as u16 and load as u32

* CPU/Recompiler: Add methods to emit global load/stores

* GTE: Convert class to namespace

* CPU/Recompiler: Call GTE functions directly

* Settings: Turn into a global variable

* GPU: Replace local pointers with global

* InterruptController: Turn into a global pointer

* System: Replace local pointers with global

* Timers: Turn into a global instance

* DMA: Turn into a global instance

* SPU: Turn into a global instance

* CDROM: Turn into a global instance

* MDEC: Turn into a global instance

* Pad: Turn into a global instance

* SIO: Turn into a global instance

* CDROM: Move audio FIFO to the heap

* CPU/Recompiler: Drop ASMFunctions

No longer needed since we have code in the same 4GB window.

* CPUCodeCache: Turn class into namespace

* Bus: Local pointer -> global pointers

* CPU: Turn class into namespace

* Bus: Turn into namespace

* GTE: Store registers in CPU state struct

Allows relative addressing on ARM.

* CPU/Recompiler: Align code storage to page size

* CPU/Recompiler: Fix relative branches on A64

* HostInterface: Local references to global

* System: Turn into a namespace, move events out

* Add guard pages

* Android: Fix build
2020-07-31 17:09:18 +10:00

49 lines
1.4 KiB
C++

#pragma once
#include "types.h"
class JitCodeBuffer
{
public:
JitCodeBuffer();
JitCodeBuffer(u32 size, u32 far_code_size);
JitCodeBuffer(void* buffer, u32 size, u32 far_code_size, u32 guard_size);
~JitCodeBuffer();
bool Allocate(u32 size = 64 * 1024 * 1024, u32 far_code_size = 0);
bool Initialize(void* buffer, u32 size, u32 far_code_size = 0, u32 guard_size = 0);
void Destroy();
void Reset();
u8* GetFreeCodePointer() const { return m_free_code_ptr; }
u32 GetFreeCodeSpace() const { return static_cast<u32>(m_code_size - m_code_used); }
void CommitCode(u32 length);
u8* GetFreeFarCodePointer() const { return m_free_far_code_ptr; }
u32 GetFreeFarCodeSpace() const { return static_cast<u32>(m_far_code_size - m_far_code_used); }
void CommitFarCode(u32 length);
/// Adjusts the free code pointer to the specified alignment, padding with bytes.
/// Assumes alignment is a power-of-two.
void Align(u32 alignment, u8 padding_value);
/// Flushes the instruction cache on the host for the specified range.
static void FlushInstructionCache(void* address, u32 size);
private:
u8* m_code_ptr = nullptr;
u8* m_free_code_ptr = nullptr;
u32 m_code_size = 0;
u32 m_code_used = 0;
u8* m_far_code_ptr = nullptr;
u8* m_free_far_code_ptr = nullptr;
u32 m_far_code_size = 0;
u32 m_far_code_used = 0;
u32 m_total_size = 0;
u32 m_guard_size = 0;
u32 m_old_protection = 0;
bool m_owns_buffer = false;
};