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LLE JIT: Reworked the block linking code. It now keeps track of what each block is waiting on, minimising the amount of recompiling. Both jumps and calls can now become linked. The code also checks the cycle count before jumping to the linked block.

Browse Source 
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6728 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau
2011-01-03 10:39:48 +00:00
parent fea85945da
commit a6637c257f
4 changed files with 78 additions and 128 deletions
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78
Source/Core/DSPCore/Src/DSPEmitter.cpp
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@ -31,9 +31,6 @@
using namespace Gen;
const u8 *stubEntryPoint;
u16 blocksCompiled;
u16 unresolvedCalls;
u16 unresolvedCallsThisBlock;
DSPEmitter::DSPEmitter() : storeIndex(-1), storeIndex2(-1)
{
@ -59,8 +56,6 @@ DSPEmitter::DSPEmitter() : storeIndex(-1), storeIndex2(-1)
blockLinks[i] = 0;
blockSize[i] = 0;
}
blocksCompiled = 0;
unresolvedCalls = 0;
}
DSPEmitter::~DSPEmitter()
@ -79,8 +74,6 @@ void DSPEmitter::ClearIRAM() {
blockLinks[i] = 0;
blockSize[i] = 0;
}
blocksCompiled = 0;
unresolvedCalls = 0;
}
// Must go out of block if exception is detected
@ -196,41 +189,11 @@ void DSPEmitter::unknown_instruction(UDSPInstruction inst)
PanicAlert("unknown_instruction %04x - Fix me ;)", inst);
}
void DSPEmitter::ClearCallFlag()
{
--unresolvedCallsThisBlock;
}
void DSPEmitter::Compile(int start_addr)
void DSPEmitter::Compile(u16 start_addr)
{
// Remember the current block address for later
startAddr = start_addr;
blocksCompiled++;
unresolvedCallsThisBlock = 0;
// If the number of unresolved calls exceeds 8, there is a critical
// block that probably cannot be resolved. If this occurs, quit linking
// blocks. Currently occurs in the zelda ucode.
if (unresolvedCalls <= 8)
{
// After every 10 blocks, clear out the blocks that have unresolved
// calls, and reattempt relinking.
if (blocksCompiled >= 10 && unresolvedCalls > 0)
{
for(int i = 0x0000; i < MAX_BLOCKS; ++i)
{
if (DSPAnalyzer::code_flags[i] & DSPAnalyzer::CODE_CALL)
{
blocks[i] = (CompiledCode)stubEntryPoint;
blockLinks[i] = 0;
blockSize[i] = 0;
}
}
// Reset and reattempt relinking
blocksCompiled = 0;
unresolvedCalls = 0;
}
}
unresolvedJumps[start_addr].clear();
const u8 *entryPoint = AlignCode16();
ABI_PushAllCalleeSavedRegsAndAdjustStack();
@ -288,19 +251,14 @@ void DSPEmitter::Compile(int start_addr)
UDSPInstruction inst = dsp_imem_read(compilePC);
const DSPOPCTemplate *opcode = GetOpTemplate(inst);
// Scan for CALL's to delay block link. TODO: Scan for J_CC after it is jitted.
if (opcode->jitFunc &&
((opcode->opcode >= 0x0290 && opcode->opcode <= 0x029f) ||
(opcode->opcode >= 0x02b0 && opcode->opcode <= 0x02bf)))
{
++unresolvedCallsThisBlock;
}
EmitInstruction(inst);
blockSize[start_addr]++;
compilePC += opcode->size;
// If the block was trying to link into itself, remove the link
unresolvedJumps[start_addr].remove(compilePC);
fixup_pc = true;
// Handle loop condition, only if current instruction was flagged as a loop destination
@ -411,16 +369,26 @@ void DSPEmitter::Compile(int start_addr)
// Mark this block as a linkable destination if it does not contain
// any unresolved CALL's
if (unresolvedCallsThisBlock == 0)
if (unresolvedJumps[start_addr].empty())
{
DSPAnalyzer::code_flags[start_addr] &= ~DSPAnalyzer::CODE_CALL;
blockLinks[start_addr] = (CompiledCode)blockLinkEntry;
}
else
{
DSPAnalyzer::code_flags[start_addr] |= DSPAnalyzer::CODE_CALL;
blockLinks[start_addr] = 0;
++unresolvedCalls;
for(u16 i = 0x0000; i < 0xffff; ++i)
{
if (!unresolvedJumps[i].empty())
{
// Check if there were any blocks waiting for this block to be linkable
int size = unresolvedJumps[i].size();
unresolvedJumps[i].remove(start_addr);
if (unresolvedJumps[i].size() < size)
{
// Mark the block to be recompiled again
blocks[i] = (CompiledCode)stubEntryPoint;
blockLinks[i] = 0;
blockSize[i] = 0;
}
}
}
}
if (blockSize[start_addr] == 0)