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LLE JIT: Speed up the dispatcher by removing the compiled block check. Initialised the blocks with a stub which calls the compiler. 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6490 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau 2010-11-28 13:06:52 +00:00
parent 93a901dd1d
commit c79f41d114
2 changed files with 27 additions and 22 deletions
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47
Source/Core/DSPCore/Src/DSPEmitter.cpp
View File

@ -30,6 +30,8 @@
using namespace Gen;
const u8 *stubEntryPoint;
DSPEmitter::DSPEmitter() : storeIndex(-1), storeIndex2(-1)
{
m_compiledCode = NULL;
@ -39,18 +41,19 @@ DSPEmitter::DSPEmitter() : storeIndex(-1), storeIndex2(-1)
blocks = new CompiledCode[MAX_BLOCKS];
blockSize = new u16[0x10000];
//clear all of the block references
for(int i = 0x0000; i < MAX_BLOCKS; i++)
{
blocks[i] = NULL;
blockSize[i] = 0;
}
compileSR = 0;
compileSR |= SR_INT_ENABLE;
compileSR |= SR_EXT_INT_ENABLE;
CompileDispatcher();
stubEntryPoint = CompileStub();
//clear all of the block references
for(int i = 0x0000; i < MAX_BLOCKS; i++)
{
blocks[i] = (CompiledCode)stubEntryPoint;
blockSize[i] = 0;
}
}
DSPEmitter::~DSPEmitter()
@ -64,12 +67,11 @@ void DSPEmitter::ClearIRAM() {
// ClearCodeSpace();
for(int i = 0x0000; i < 0x1000; i++)
{
blocks[i] = NULL;
blocks[i] = (CompiledCode)stubEntryPoint;
blockSize[i] = 0;
}
}
// Must go out of block if exception is detected
void DSPEmitter::checkExceptions(u32 retval) {
// Check for interrupts and exceptions
@ -296,6 +298,20 @@ void DSPEmitter::Compile(int start_addr)
RET();
}
const u8 *DSPEmitter::CompileStub()
{
const u8 *entryPoint = AlignCode16();
ABI_PushAllCalleeSavedRegsAndAdjustStack();
// ABI_AlignStack(0);
CALL((void *)CompileCurrent);
// ABI_RestoreStack(0);
ABI_PopAllCalleeSavedRegsAndAdjustStack();
//MOVZX(32, 16, ECX, M(&g_dsp.pc));
XOR(32, R(EAX), R(EAX)); // Return 0 cycles executed
RET();
return entryPoint;
}
void DSPEmitter::CompileDispatcher()
{
enterDispatcher = AlignCode16();
@ -305,11 +321,9 @@ void DSPEmitter::CompileDispatcher()
#ifdef _M_IX86
MOV(32, R(ESI), M(&cyclesLeft));
MOV(32, R(EBX), Imm32((u32)blocks));
MOV(32, R(EDI), Imm32((u32)blockSize));
#else
MOV(32, R(ESI), M(&cyclesLeft));
MOV(64, R(RBX), Imm64((u64)blocks));
MOV(64, R(RDI), Imm64((u64)blockSize));
#endif
const u8 *dispatcherLoop = GetCodePtr();
@ -318,16 +332,7 @@ void DSPEmitter::CompileDispatcher()
TEST(8, M(&g_dsp.cr), Imm8(CR_HALT));
FixupBranch halt = J_CC(CC_NE);
// Check if block has been compiled (blockSize > 0)
MOVZX(32, 16, ECX, M(&g_dsp.pc));
MOVZX(32, 16, EAX, MComplex(RDI, ECX, SCALE_2, 0));
TEST(16, R(AX), R(AX));
// Compile block if needed
FixupBranch found = J_CC(CC_NE);
CALL((void *)CompileCurrent);
MOVZX(32, 16, ECX, M(&g_dsp.pc));
SetJumpTarget(found);
// Execute block. Cycles executed returned in EAX.
#ifdef _M_IX86
@ -338,7 +343,7 @@ void DSPEmitter::CompileDispatcher()
// Decrement cyclesLeft
SUB(32, R(ESI), R(EAX));
J_CC(CC_A, dispatcherLoop);
// DSP gave up the remaining cycles.

2
Source/Core/DSPCore/Src/DSPEmitter.h
View File

@ -41,7 +41,7 @@ public:
void ClearIRAM();
void CompileDispatcher();
const u8 *CompileStub();
void Compile(int start_addr);
int STACKALIGN RunForCycles(int cycles);