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Merge pull request #1724 from Sonicadvance1/AArch64_dispatcher_optimization 

[AArch64] Optimization in the dispatcher.
This commit is contained in:
Ryan Houdek 2014-12-21 20:08:40 -06:00
parent e423939c9f 360cf761d2
commit 5cf79fd3b1
1 changed files with 13 additions and 5 deletions
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18
Source/Core/Core/PowerPC/JitArm64/JitAsm.cpp
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@ -13,15 +13,24 @@ using namespace Arm64Gen;
void JitArm64AsmRoutineManager::Generate() void JitArm64AsmRoutineManager::Generate()
{ {
// This value is all of the callee saved registers that we are required to save.
// According to the AACPS64 we need to save R19 ~ R30.
const u32 ALL_CALLEE_SAVED = 0x7FF80000;
BitSet32 regs_to_save(ALL_CALLEE_SAVED);
enterCode = GetCodePtr(); enterCode = GetCodePtr();
SUB(SP, SP, 16); ABI_PushRegisters(regs_to_save);
STR(INDEX_UNSIGNED, X30, SP, 0);
MOVI2R(X29, (u64)&PowerPC::ppcState); MOVI2R(X29, (u64)&PowerPC::ppcState);
FixupBranch to_dispatcher = B();
// If we align the dispatcher to a page then we can load its location with one ADRP instruction
AlignCodePage();
dispatcher = GetCodePtr(); dispatcher = GetCodePtr();
printf("Dispatcher is %p\n", dispatcher); WARN_LOG(DYNA_REC, "Dispatcher is %p\n", dispatcher);
SetJumpTarget(to_dispatcher);
// Downcount Check // Downcount Check
// The result of slice decrementation should be in flags if somebody jumped here // The result of slice decrementation should be in flags if somebody jumped here
// IMPORTANT - We jump on negative, not carry!!! // IMPORTANT - We jump on negative, not carry!!!
@ -77,8 +86,7 @@ void JitArm64AsmRoutineManager::Generate()
SetJumpTarget(Exit); SetJumpTarget(Exit);
LDR(INDEX_UNSIGNED, X30, SP, 0); ABI_PopRegisters(regs_to_save);
ADD(SP, SP, 16);
RET(X30); RET(X30);
FlushIcache(); FlushIcache();