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JitArm64: Use LDP in slow dispatcher 

With one LDP instruction, we can replace two LDR instructions.
This commit is contained in:
JosJuice 2023-06-16 19:55:24 +02:00
parent 4a4e7d9b8a
commit c9347a2a19
1 changed files with 13 additions and 10 deletions
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23
Source/Core/Core/PowerPC/JitArm64/JitAsm.cpp
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@ -115,10 +115,14 @@ void JitArm64::GenerateAsm()
}
else
{
// iCache[(address >> 2) & iCache_Mask];
ARM64Reg pc_masked = ARM64Reg::W8;
ARM64Reg cache_base = ARM64Reg::X9;
ARM64Reg block = ARM64Reg::X10;
ARM64Reg pc = ARM64Reg::W11;
ARM64Reg msr = ARM64Reg::W12;
ARM64Reg msr2 = ARM64Reg::W13;
// iCache[(address >> 2) & iCache_Mask];
ORR(pc_masked, ARM64Reg::WZR,
LogicalImm(JitBaseBlockCache::FAST_BLOCK_MAP_FALLBACK_MASK << 3, 32));
AND(pc_masked, pc_masked, DISPATCHER_PC, ArithOption(DISPATCHER_PC, ShiftType::LSL, 1));
@ -127,22 +131,21 @@ void JitArm64::GenerateAsm()
FixupBranch not_found = CBZ(block);
// b.effectiveAddress != addr || b.msrBits != msr
ARM64Reg pc_and_msr = ARM64Reg::W11;
ARM64Reg pc_and_msr2 = ARM64Reg::W12;
LDR(IndexType::Unsigned, pc_and_msr, block, offsetof(JitBlockData, effectiveAddress));
CMP(pc_and_msr, DISPATCHER_PC);
static_assert(offsetof(JitBlockData, msrBits) + 4 ==
offsetof(JitBlockData, effectiveAddress));
LDP(IndexType::Signed, msr, pc, block, offsetof(JitBlockData, effectiveAddress));
CMP(pc, DISPATCHER_PC);
FixupBranch pc_mismatch = B(CC_NEQ);
LDR(IndexType::Unsigned, pc_and_msr2, PPC_REG, PPCSTATE_OFF(msr));
AND(pc_and_msr2, pc_and_msr2, LogicalImm(JitBaseBlockCache::JIT_CACHE_MSR_MASK, 32));
LDR(IndexType::Unsigned, pc_and_msr, block, offsetof(JitBlockData, msrBits));
CMP(pc_and_msr, pc_and_msr2);
LDR(IndexType::Unsigned, msr2, PPC_REG, PPCSTATE_OFF(msr));
AND(msr2, msr2, LogicalImm(JitBaseBlockCache::JIT_CACHE_MSR_MASK, 32));
CMP(msr, msr2);
FixupBranch msr_mismatch = B(CC_NEQ);
// return blocks[block_num].normalEntry;
LDR(IndexType::Unsigned, block, block, offsetof(JitBlockData, normalEntry));
BR(block);
SetJumpTarget(not_found);
SetJumpTarget(pc_mismatch);
SetJumpTarget(msr_mismatch);