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Use atomic compare exchange in stdcx/stwcx (still under the global lock)

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This commit is contained in:
Dr. Chat
2016-01-13 01:45:31 -06:00
parent 51dde62f09
commit f0802d75fa
4 changed files with 22 additions and 6 deletions
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12
src/xenia/cpu/ppc/ppc_emit_memory.cc
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@@ -658,6 +658,7 @@ int InstrEmit_ldarx(PPCHIRBuilder& f, const InstrData& i) {
Value* ea = CalculateEA_0(f, i.X.RA, i.X.RB);
Value* rt = f.ByteSwap(f.Load(ea, INT64_TYPE));
f.StoreReserved(rt);
f.StoreGPR(i.X.RT, rt);
return 0;
}
@@ -682,6 +683,7 @@ int InstrEmit_lwarx(PPCHIRBuilder& f, const InstrData& i) {
Value* ea = CalculateEA_0(f, i.X.RA, i.X.RB);
Value* rt = f.ZeroExtend(f.ByteSwap(f.Load(ea, INT32_TYPE)), INT64_TYPE);
f.StoreReserved(rt);
f.StoreGPR(i.X.RT, rt);
return 0;
}
@@ -703,8 +705,9 @@ int InstrEmit_stdcx(PPCHIRBuilder& f, const InstrData& i) {
Value* ea = CalculateEA_0(f, i.X.RA, i.X.RB);
Value* rt = f.ByteSwap(f.LoadGPR(i.X.RT));
f.Store(ea, rt);
f.StoreContext(offsetof(PPCContext, cr0.cr0_eq), f.LoadConstantInt8(1));
Value* res = f.ByteSwap(f.LoadReserved());
Value* v = f.AtomicCompareExchange(ea, res, rt);
f.StoreContext(offsetof(PPCContext, cr0.cr0_eq), v);
f.StoreContext(offsetof(PPCContext, cr0.cr0_lt), f.LoadZeroInt8());
f.StoreContext(offsetof(PPCContext, cr0.cr0_gt), f.LoadZeroInt8());
@@ -732,8 +735,9 @@ int InstrEmit_stwcx(PPCHIRBuilder& f, const InstrData& i) {
Value* ea = CalculateEA_0(f, i.X.RA, i.X.RB);
Value* rt = f.ByteSwap(f.Truncate(f.LoadGPR(i.X.RT), INT32_TYPE));
f.Store(ea, rt);
f.StoreContext(offsetof(PPCContext, cr0.cr0_eq), f.LoadConstantInt8(1));
Value* res = f.ByteSwap(f.Truncate(f.LoadReserved(), INT32_TYPE));
Value* v = f.AtomicCompareExchange(ea, res, rt);
f.StoreContext(offsetof(PPCContext, cr0.cr0_eq), v);
f.StoreContext(offsetof(PPCContext, cr0.cr0_lt), f.LoadZeroInt8());
f.StoreContext(offsetof(PPCContext, cr0.cr0_gt), f.LoadZeroInt8());