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LLE JIT: Added an ASM dispatcher. Should help pave the way for future optimisation.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6486 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau
2010-11-28 05:28:21 +00:00
parent 88916a61da
commit 6a6fb9cce9
4 changed files with 124 additions and 47 deletions
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142
Source/Core/DSPCore/Src/DSPEmitter.cpp
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@ -26,6 +26,7 @@
#include "ABI.h"
#define MAX_BLOCK_SIZE 250
#define DSP_IDLE_SKIP_CYCLES 1000
using namespace Gen;
@ -150,9 +151,9 @@ void DSPEmitter::Default(UDSPInstruction _inst)
EmitInstruction(_inst);
}
const u8 *DSPEmitter::Compile(int start_addr) {
AlignCode16();
const u8 *entryPoint = GetCodePtr();
void DSPEmitter::Compile(int start_addr)
{
const u8 *entryPoint = AlignCode16();
ABI_PushAllCalleeSavedRegsAndAdjustStack();
// ABI_AlignStack(0);
@ -185,13 +186,8 @@ const u8 *DSPEmitter::Compile(int start_addr) {
const DSPOPCTemplate *opcode = GetOpTemplate(inst);
// Increment PC - we shouldn't need to do this for every instruction. only for branches and end of block.
// fallbacks to interpreter need this for fetching immedate values
#ifdef _M_IX86 // All32
// Fallbacks to interpreter need this for fetching immediate values
ADD(16, M(&(g_dsp.pc)), Imm16(1));
#else
MOV(64, R(RAX), ImmPtr(&(g_dsp.pc)));
ADD(16, MDisp(RAX,0), Imm16(1));
#endif
EmitInstruction(inst);
@ -202,7 +198,6 @@ const u8 *DSPEmitter::Compile(int start_addr) {
// by the analyzer.
if (DSPAnalyzer::code_flags[addr-1] & DSPAnalyzer::CODE_LOOP_END)
{
// TODO: Change to TEST for some reason (who added this comment?)
#ifdef _M_IX86 // All32
MOVZX(32, 16, EAX, M(&(g_dsp.r[DSP_REG_ST2])));
#else
@ -232,16 +227,19 @@ const u8 *DSPEmitter::Compile(int start_addr) {
SetJumpTarget(rLoopCounterExit);
}
if (opcode->branch) {
if (opcode->uncond_branch) {
if (opcode->branch)
{
if (opcode->uncond_branch)
{
break;
} else {
}
else
{
//look at g_dsp.pc if we actually branched
#ifdef _M_IX86 // All32
MOV(16, R(AX), M(&(g_dsp.pc)));
MOV(16, R(AX), M(&g_dsp.pc));
#else
MOV(64, R(RAX), ImmPtr(&(g_dsp.pc)));
MOV(16, R(AX), MDisp(RAX,0));
MOVZX(32, 16, EAX, M(&g_dsp.pc));
#endif
CMP(16, R(AX), Imm16(addr));
FixupBranch rNoBranch = J_CC(CC_Z);
@ -256,7 +254,8 @@ const u8 *DSPEmitter::Compile(int start_addr) {
}
// End the block if we're before an idle skip address
if (DSPAnalyzer::code_flags[addr] & DSPAnalyzer::CODE_IDLE_SKIP) {
if (DSPAnalyzer::code_flags[addr] & DSPAnalyzer::CODE_IDLE_SKIP)
{
break;
}
}
@ -274,56 +273,129 @@ const u8 *DSPEmitter::Compile(int start_addr) {
ABI_PopAllCalleeSavedRegsAndAdjustStack();
MOV(32,R(EAX),Imm32(blockSize[start_addr]));
RET();
return entryPoint;
}
void STACKALIGN DSPEmitter::CompileDispatcher()
void DSPEmitter::CompileDispatcher()
{
/*
// TODO
enterDispatcher = GetCodePtr();
AlignCode16();
enterDispatcher = AlignCode16();
ABI_PushAllCalleeSavedRegsAndAdjustStack();
const u8 *outer_loop = GetCodePtr();
//Landing pad for drec space
// Cache pointers into registers
#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();
// Check for DSP halt
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);
SetJumpTarget(found);
// Check if we have enough cycles to execute
CMP(32, R(ESI), R(EAX));
FixupBranch noCycles = J_CC(CC_B);
// Check for idle skip (C++ version below)
// if (code_flags[pc] & CODE_IDLE_SKIP)
// if (cycles > DSP_IDLE_SKIP_CYCLES) cycles -= DSP_IDLE_SKIP_CYCLES;
// else cycles = 0;
#ifdef _M_IX86
MOV(32, R(EDX), Imm32((u32)DSPAnalyzer::code_flags));
#else
MOV(64, R(RDX), Imm64((u64)DSPAnalyzer::code_flags));
#endif
TEST(8, MComplex(RDX, ECX, SCALE_1, 0), Imm8(DSPAnalyzer::CODE_IDLE_SKIP));
FixupBranch noIdleSkip = J_CC(CC_E);
SUB(32, R(ESI), Imm32(DSP_IDLE_SKIP_CYCLES));
FixupBranch idleSkip = J_CC(CC_A);
//MOV(32, M(&cyclesLeft), Imm32(0));
ABI_PopAllCalleeSavedRegsAndAdjustStack();
RET();*/
RET();
SetJumpTarget(idleSkip);
SetJumpTarget(noIdleSkip);
// Execute block. Cycles executed returned in EAX.
#ifdef _M_IX86
CALLptr(MComplex(EBX, ECX, SCALE_4, 0));
#else
CALLptr(MComplex(RBX, ECX, SCALE_8, 0));
#endif
// Decrement cyclesLeft
SUB(32, R(ESI), R(EAX));
J_CC(CC_A, dispatcherLoop);
// Not enough cycles.
SetJumpTarget(noCycles);
//MOV(32, M(&cyclesLeft), R(ESI));
//ABI_PopAllCalleeSavedRegsAndAdjustStack();
//RET();
// DSP gave up the remaining cycles.
SetJumpTarget(halt);
//MOV(32, M(&cyclesLeft), Imm32(0));
ABI_PopAllCalleeSavedRegsAndAdjustStack();
RET();
}
// Don't use the % operator in the inner loop. It's slow.
int STACKALIGN DSPEmitter::RunForCycles(int cycles)
{
const int idle_cycles = 1000;
const int idle_cycles = DSP_IDLE_SKIP_CYCLES;
while (!(g_dsp.cr & CR_HALT))
{
// Compile the block if needed
u16 block_addr = g_dsp.pc;
if (!blocks[block_addr])
int block_size = blockSize[block_addr];
if (!block_size)
{
CompileCurrent();
block_size = blockSize[block_addr];
}
int block_size = blockSize[block_addr];
// Execute the block if we have enough cycles
if (cycles > block_size)
{
int c = blocks[block_addr]();
if (DSPAnalyzer::code_flags[block_addr] & DSPAnalyzer::CODE_IDLE_SKIP) {
if (DSPAnalyzer::code_flags[block_addr] & DSPAnalyzer::CODE_IDLE_SKIP)
{
if (cycles > idle_cycles)
cycles -= idle_cycles;
else
cycles = 0;
} else {
}
else
{
cycles -= c;
}
}
else {
else
{
break;
}
}
// DSP gave up the remaining cycles.
if (g_dsp.cr & CR_HALT)
return 0;
return cycles;
}