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JitArm64: Implement low DCBZ hack 

JitArm64 port of 76228fa.
This commit is contained in:
JosJuice 2022-05-07 12:37:05 +02:00
parent 8335ec70e5
commit 16eb188f1d
1 changed files with 26 additions and 2 deletions
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28
Source/Core/Core/PowerPC/JitArm64/JitArm64_LoadStore.cpp
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@ -6,6 +6,7 @@
#include "Common/Arm64Emitter.h"
#include "Common/BitSet.h"
#include "Common/CommonTypes.h"
#include "Common/ScopeGuard.h"
#include "Core/ConfigManager.h"
#include "Core/Core.h"
@ -770,7 +771,22 @@ void JitArm64::dcbz(UGeckoInstruction inst)
gpr.Lock(ARM64Reg::W0, ARM64Reg::W30);
ARM64Reg addr_reg = ARM64Reg::W0;
Common::ScopeGuard register_guard([&] { gpr.Unlock(ARM64Reg::W0, ARM64Reg::W30); });
constexpr ARM64Reg addr_reg = ARM64Reg::W0;
constexpr ARM64Reg temp_reg = ARM64Reg::W30;
// HACK: Don't clear any memory in the [0x8000'0000, 0x8000'8000) region.
FixupBranch end_dcbz_hack;
bool using_dcbz_hack = false;
const auto emit_low_dcbz_hack = [&](ARM64Reg reg) {
if (m_low_dcbz_hack)
{
CMPI2R(reg, 0x8000'8000, temp_reg);
end_dcbz_hack = B(CCFlags::CC_LT);
using_dcbz_hack = true;
}
};
if (a)
{
@ -781,6 +797,8 @@ void JitArm64::dcbz(UGeckoInstruction inst)
{
// full imm_addr
u32 imm_addr = gpr.GetImm(b) + gpr.GetImm(a);
if (m_low_dcbz_hack && imm_addr >= 0x8000'0000 && imm_addr < 0x8000'8000)
return;
MOVI2R(addr_reg, imm_addr & ~31);
}
else if (is_imm_a || is_imm_b)
@ -789,12 +807,14 @@ void JitArm64::dcbz(UGeckoInstruction inst)
ARM64Reg base = is_imm_a ? gpr.R(b) : gpr.R(a);
u32 imm_offset = is_imm_a ? gpr.GetImm(a) : gpr.GetImm(b);
ADDI2R(addr_reg, base, imm_offset, addr_reg);
emit_low_dcbz_hack(addr_reg);
AND(addr_reg, addr_reg, LogicalImm(~31, 32));
}
else
{
// Both are registers
ADD(addr_reg, gpr.R(a), gpr.R(b));
emit_low_dcbz_hack(addr_reg);
AND(addr_reg, addr_reg, LogicalImm(~31, 32));
}
}
@ -804,10 +824,13 @@ void JitArm64::dcbz(UGeckoInstruction inst)
if (gpr.IsImm(b))
{
u32 imm_addr = gpr.GetImm(b);
if (m_low_dcbz_hack && imm_addr >= 0x8000'0000 && imm_addr < 0x8000'8000)
return;
MOVI2R(addr_reg, imm_addr & ~31);
}
else
{
emit_low_dcbz_hack(gpr.R(b));
AND(addr_reg, gpr.R(b), LogicalImm(~31, 32));
}
}
@ -819,7 +842,8 @@ void JitArm64::dcbz(UGeckoInstruction inst)
EmitBackpatchRoutine(BackPatchInfo::FLAG_ZERO_256, jo.fastmem, jo.fastmem, ARM64Reg::W0,
EncodeRegTo64(addr_reg), gprs_to_push, fprs_to_push);
gpr.Unlock(ARM64Reg::W0, ARM64Reg::W30);
if (using_dcbz_hack)
SetJumpTarget(end_dcbz_hack);
}
void JitArm64::eieio(UGeckoInstruction inst)