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LLE JIT:

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* Added 21 Arithmetic instructions to the JIT
* Used the DSPAnalyser to identify arithmetic/multiplier instructions that precede a conditional branch.  This allows the JIT to skip updating the SR when nothing would read from it.  Marked all arithmetic/multiplier instructions in the DSPTable for this purpose.
* Converted CheckExternalInterrupt into ASM
* Fixed a couple instructions in DSP Load/Store


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6633 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau
2010-12-21 14:48:05 +00:00
parent 0030d55725
commit 6cb78515c6
11 changed files with 977 additions and 514 deletions
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25
Source/Core/DSPCore/Src/DSPAnalyzer.cpp
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@ -85,6 +85,7 @@ void AnalyzeRange(int start_addr, int end_addr)
// This may not be 100% accurate in case of jump tables!
// It could get desynced, which would be bad. We'll see if that's an issue.
u16 last_arithmetic = 0;
for (int addr = start_addr; addr < end_addr;)
{
UDSPInstruction inst = dsp_imem_read(addr);
@ -96,16 +97,32 @@ void AnalyzeRange(int start_addr, int end_addr)
}
code_flags[addr] |= CODE_START_OF_INST;
// Look for loops.
if ((inst & 0xffe0) == 0x0060 || (inst & 0xff00) == 0x1100) {
if ((inst & 0xffe0) == 0x0060 || (inst & 0xff00) == 0x1100)
{
// BLOOP, BLOOPI
u16 loop_end = dsp_imem_read(addr + 1);
code_flags[addr] |= CODE_LOOP_START;
code_flags[loop_end] |= CODE_LOOP_END;
} else if ((inst & 0xffe0) == 0x0040 || (inst & 0xff00) == 0x1000) {
}
else if ((inst & 0xffe0) == 0x0040 || (inst & 0xff00) == 0x1000)
{
// LOOP, LOOPI
code_flags[addr] |= CODE_LOOP_START;
code_flags[addr + 1] |= CODE_LOOP_END;
}
// Mark the last arithmetic/multiplier instruction before a branch.
// We must update the SR reg at these instructions
if (opcode->updates_sr)
{
last_arithmetic = addr;
}
if (opcode->branch && !opcode->uncond_branch)
{
code_flags[last_arithmetic] |= CODE_UPDATE_SR;
}
addr += opcode->size;
}
@ -126,12 +143,12 @@ void AnalyzeRange(int start_addr, int end_addr)
}
if (found)
{
NOTICE_LOG(DSPLLE, "Idle skip location found at %02x (sigNum:%d)", addr, s+1);
INFO_LOG(DSPLLE, "Idle skip location found at %02x (sigNum:%d)", addr, s+1);
code_flags[addr] |= CODE_IDLE_SKIP;
}
}
}
NOTICE_LOG(DSPLLE, "Finished analysis.");
INFO_LOG(DSPLLE, "Finished analysis.");
}
void Analyze()