optimise away unneeded flag sets

- especially useful for thumb code and larger max block sizes
- can still be improved upon

8 files changed, 248 insertions, 109 deletions

diff --git a/src/ARMJIT.cpp b/src/ARMJIT.cpp
index 949bc1c..3b6bc2e 100644
--- a/src/ARMJIT.cpp
+++ b/src/ARMJIT.cpp
@@ -126,6 +126,24 @@ void DeInit()
 	delete compiler;
 }
 
+void floodFillSetFlags(FetchedInstr instrs[], int start, u8 flags)
+{
+	for (int j = start; j >= 0; j--)
+	{
+		u8 match = instrs[j].Info.WriteFlags & flags;
+		u8 matchMaybe = (instrs[j].Info.WriteFlags >> 4) & flags;
+		if (matchMaybe) // writes flags maybe
+			instrs[j].SetFlags |= matchMaybe;
+		if (match)
+		{
+			instrs[j].SetFlags |= match;
+			flags &= ~match;
+			if (!flags)
+				return;
+		}
+	}
+}
+
 CompiledBlock CompileBlock(ARM* cpu)
 {
     bool thumb = cpu->CPSR & 0x20;
@@ -175,8 +193,14 @@ CompiledBlock CompileBlock(ARM* cpu)
         instrs[i].Info = ARMInstrInfo::Decode(thumb, cpu->Num, instrs[i].Instr);
 
         i++;
+
+		bool canCompile = compiler->CanCompile(thumb, instrs[i - 1].Info.Kind);
+		if (instrs[i - 1].Info.ReadFlags != 0 || !canCompile)
+			floodFillSetFlags(instrs, i - 2, canCompile ? instrs[i - 1].Info.ReadFlags : 0xF);
     } while(!instrs[i - 1].Info.EndBlock && i < Config::JIT_MaxBlockSize);
 
+	floodFillSetFlags(instrs, i - 1, 0xF);
+
     CompiledBlock block = compiler->CompileBlock(cpu, instrs, i);
 
 	if (cpu->Num == 0)
diff --git a/src/ARMJIT.h b/src/ARMJIT.h
index 0fc1c38..6197695 100644
--- a/src/ARMJIT.h
+++ b/src/ARMJIT.h
@@ -28,6 +28,7 @@ struct FetchedInstr
         return Instr >> 28;
     }
 
+	u8 SetFlags;
     u32 Instr;
     u32 NextInstr[2];
 
diff --git a/src/ARMJIT_x64/ARMJIT_ALU.cpp b/src/ARMJIT_x64/ARMJIT_ALU.cpp
index f0bcf8e..6a7d711 100644
--- a/src/ARMJIT_x64/ARMJIT_ALU.cpp
+++ b/src/ARMJIT_x64/ARMJIT_ALU.cpp
@@ -111,6 +111,8 @@ OpArg Compiler::A_Comp_GetALUOp2(bool S, bool& carryUsed)
     }
     else
     {
+        S = S && (CurInstr.SetFlags & 0x2);
+
         int op = (CurInstr.Instr >> 5) & 0x3;
         if (CurInstr.Instr & (1 << 4))
         {
@@ -215,7 +217,8 @@ void Compiler::A_Comp_MovOp()
 
     if (S)
     {
-        TEST(32, rd, rd);
+        if (FlagsNZRequired())
+            TEST(32, rd, rd);
         Comp_RetriveFlags(false, false, carryUsed);
     }
 
@@ -263,12 +266,14 @@ void Compiler::Comp_MulOp(bool S, bool add, Gen::OpArg rd, Gen::OpArg rm, Gen::O
     {
         IMUL(32, RSCRATCH, rs);
         LEA(32, rd.GetSimpleReg(), MRegSum(RSCRATCH, rn.GetSimpleReg()));
-        TEST(32, rd, rd);
+        if (S && FlagsNZRequired())
+            TEST(32, rd, rd);
     }
     else
     {
         IMUL(32, RSCRATCH, rs);
         MOV(32, rd, R(RSCRATCH));
+        if (S && FlagsNZRequired())
         TEST(32, R(RSCRATCH), R(RSCRATCH));
     }
 
@@ -331,7 +336,7 @@ void Compiler::A_Comp_SMULL_SMLAL()
     else
     {
         IMUL(64, RSCRATCH2, R(RSCRATCH3));
-        if (S)
+        if (S && FlagsNZRequired())
             TEST(64, R(RSCRATCH2), R(RSCRATCH2));
     }
 
@@ -345,9 +350,20 @@ void Compiler::A_Comp_SMULL_SMLAL()
 
 void Compiler::Comp_RetriveFlags(bool sign, bool retriveCV, bool carryUsed)
 {
-    CPSRDirty = true;
+    if (CurInstr.SetFlags == 0)
+        return;
+    if (retriveCV && !(CurInstr.SetFlags & 0x3))
+        retriveCV = false;
 
     bool carryOnly = !retriveCV && carryUsed;
+    if (carryOnly && !(CurInstr.SetFlags & 0x2))
+    {
+        carryUsed = false;
+        carryOnly = false;
+    }
+
+    CPSRDirty = true;
+
     if (retriveCV)
     {
         SETcc(CC_O, R(RSCRATCH));
@@ -355,19 +371,28 @@ void Compiler::Comp_RetriveFlags(bool sign, bool retriveCV, bool carryUsed)
         LEA(32, RSCRATCH2, MComplex(RSCRATCH, RSCRATCH3, SCALE_2, 0));
     }
 
-    SETcc(CC_S, R(RSCRATCH));
-    SETcc(CC_Z, R(RSCRATCH3));
-    LEA(32, RSCRATCH, MComplex(RSCRATCH3, RSCRATCH, SCALE_2, 0));
-    int shiftAmount = 30;
-    if (retriveCV || carryUsed)
+    if (FlagsNZRequired())
     {
-        LEA(32, RSCRATCH, MComplex(RSCRATCH2, RSCRATCH, carryOnly ? SCALE_2 : SCALE_4, 0));
-        shiftAmount = carryOnly ? 29 : 28;
-    }
-    SHL(32, R(RSCRATCH), Imm8(shiftAmount));
+        SETcc(CC_S, R(RSCRATCH));
+        SETcc(CC_Z, R(RSCRATCH3));
+        LEA(32, RSCRATCH, MComplex(RSCRATCH3, RSCRATCH, SCALE_2, 0));
+        int shiftAmount = 30;
+        if (retriveCV || carryUsed)
+        {
+            LEA(32, RSCRATCH, MComplex(RSCRATCH2, RSCRATCH, carryOnly ? SCALE_2 : SCALE_4, 0));
+            shiftAmount = carryOnly ? 29 : 28;
+        }
+        SHL(32, R(RSCRATCH), Imm8(shiftAmount));
 
-    AND(32, R(RCPSR), Imm32(0x3FFFFFFF & ~(carryUsed << 29) & ~((retriveCV ? 3 : 0) << 28)));
-    OR(32, R(RCPSR), R(RSCRATCH));
+        AND(32, R(RCPSR), Imm32(0x3FFFFFFF & ~(carryUsed << 29) & ~((retriveCV ? 3 : 0) << 28)));
+        OR(32, R(RCPSR), R(RSCRATCH));
+    }
+    else
+    {
+        SHL(32, R(RSCRATCH2), Imm8(carryOnly ? 29 : 28));
+        AND(32, R(RCPSR), Imm32(0xFFFFFFFF & ~(carryUsed << 29) & ~((retriveCV ? 3 : 0) << 28)));
+        OR(32, R(RCPSR), R(RSCRATCH2));
+    }
 }
 
 // always uses RSCRATCH, RSCRATCH2 only if S == true
@@ -523,7 +548,8 @@ void Compiler::T_Comp_ShiftImm()
     if (shifted != rd)
         MOV(32, rd, shifted);
 
-    TEST(32, rd, rd);
+    if (FlagsNZRequired())
+        TEST(32, rd, rd);
     Comp_RetriveFlags(false, false, carryUsed);
 }
 
@@ -557,7 +583,8 @@ void Compiler::T_Comp_ALU_Imm8()
     {
     case 0x0:
         MOV(32, rd, imm);
-        TEST(32, rd, rd);
+        if (FlagsNZRequired())
+            TEST(32, rd, rd);
         Comp_RetriveFlags(false, false, false);
         return;
     case 0x1:
@@ -607,7 +634,8 @@ void Compiler::T_Comp_ALU()
             int shiftOp = op == 0x7 ? 3 : op - 0x2;
             bool carryUsed;
             OpArg shifted = Comp_RegShiftReg(shiftOp, rs, rd, true, carryUsed);
-            TEST(32, shifted, shifted);
+            if (FlagsNZRequired())
+                TEST(32, shifted, shifted);
             MOV(32, rd, shifted);
             Comp_RetriveFlags(false, false, true);
         }
diff --git a/src/ARMJIT_x64/ARMJIT_Compiler.cpp b/src/ARMJIT_x64/ARMJIT_Compiler.cpp
index ab13cb6..6abb2bb 100644
--- a/src/ARMJIT_x64/ARMJIT_Compiler.cpp
+++ b/src/ARMJIT_x64/ARMJIT_Compiler.cpp
@@ -342,6 +342,11 @@ const Compiler::CompileFunc T_Comp[ARMInstrInfo::tk_Count] = {
 };
 #undef F
 
+bool Compiler::CanCompile(bool thumb, u16 kind)
+{
+    return (thumb ? T_Comp[kind] : A_Comp[kind]) != NULL;
+}
+
 void Compiler::Reset()
 {
     memset(ResetStart, 0xcc, CodeMemSize);
@@ -380,11 +385,15 @@ CompiledBlock Compiler::CompileBlock(ARM* cpu, FetchedInstr instrs[], int instrs
     // TODO: this is ugly as a whole, do better
     RegCache = RegisterCache<Compiler, X64Reg>(this, instrs, instrsCount);
 
+    printf("block start %d\n", Thumb);
+
     for (int i = 0; i < instrsCount; i++)
     {
         R15 += Thumb ? 2 : 4;
         CurInstr = instrs[i];
 
+        printf("%x %d %d %d\n", CurInstr.Instr, CurInstr.SetFlags, CurInstr.Info.WriteFlags, CurInstr.Info.ReadFlags);
+
         CompileFunc comp = Thumb
             ? T_Comp[CurInstr.Info.Kind]
             : A_Comp[CurInstr.Info.Kind];
diff --git a/src/ARMJIT_x64/ARMJIT_Compiler.h b/src/ARMJIT_x64/ARMJIT_Compiler.h
index 3151cbc..8861884 100644
--- a/src/ARMJIT_x64/ARMJIT_Compiler.h
+++ b/src/ARMJIT_x64/ARMJIT_Compiler.h
@@ -29,6 +29,8 @@ public:
     void LoadReg(int reg, Gen::X64Reg nativeReg);
     void SaveReg(int reg, Gen::X64Reg nativeReg);
 
+    bool CanCompile(bool thumb, u16 kind);
+
     typedef void (Compiler::*CompileFunc)();
 
     void Comp_JumpTo(Gen::X64Reg addr, bool restoreCPSR = false);
@@ -64,7 +66,6 @@ public:
     void A_Comp_BranchImm();
     void A_Comp_BranchXchangeReg();
 
-
     void T_Comp_ShiftImm();
     void T_Comp_AddSub_();
     void T_Comp_ALU_Imm8();
@@ -121,6 +122,9 @@ public:
     void LoadCPSR();
     void SaveCPSR();
 
+    bool FlagsNZRequired()
+    { return CurInstr.SetFlags & 0xC; }
+
     Gen::FixupBranch CheckCondition(u32 cond);
 
     Gen::OpArg MapReg(int reg)
diff --git a/src/ARM_InstrInfo.cpp b/src/ARM_InstrInfo.cpp
index 4813799..ea6d827 100644
--- a/src/ARM_InstrInfo.cpp
+++ b/src/ARM_InstrInfo.cpp
@@ -5,7 +5,7 @@
 namespace ARMInstrInfo
 {
 
-#define ak(x) ((x) << 13)
+#define ak(x) ((x) << 18)
 
 enum {
     A_Read0             = 1 << 0,
@@ -26,69 +26,81 @@ enum {
     A_Link              = 1 << 10,
 
     A_UnkOnARM7         = 1 << 11,
+
+    A_SetNZ             = 1 << 12,
+    A_SetCV             = 1 << 13,
+    A_SetMaybeC         = 1 << 14,
+    A_MulFlags          = 1 << 15,
+    A_ReadC             = 1 << 16,
+    A_RRXReadC          = 1 << 17,
 };
 
 #define A_BIOP A_Read16
 #define A_MONOOP 0
 
-#define A_IMPLEMENT_ALU_OP(x,k) \
-    const u32 A_##x##_IMM = A_Write12 | A_##k | ak(ak_##x##_IMM); \
-    const u32 A_##x##_REG_LSL_IMM = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSL_IMM); \
-    const u32 A_##x##_REG_LSR_IMM = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSR_IMM); \
-    const u32 A_##x##_REG_ASR_IMM = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ASR_IMM); \
-    const u32 A_##x##_REG_ROR_IMM = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ROR_IMM); \
-    const u32 A_##x##_REG_LSL_REG = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG); \
-    const u32 A_##x##_REG_LSR_REG = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG); \
-    const u32 A_##x##_REG_ASR_REG = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG); \
-    const u32 A_##x##_REG_ROR_REG = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG); \
+#define A_ARITH A_SetCV
+#define A_LOGIC A_SetMaybeC
+#define A_ARITH_IMM A_SetCV
+#define A_LOGIC_IMM 0
+
+#define A_IMPLEMENT_ALU_OP(x,k,a,c) \
+    const u32 A_##x##_IMM = A_Write12 | c | A_##k | ak(ak_##x##_IMM); \
+    const u32 A_##x##_REG_LSL_IMM = A_Write12 | c | A_##k | A_Read0 | ak(ak_##x##_REG_LSL_IMM); \
+    const u32 A_##x##_REG_LSR_IMM = A_Write12 | c | A_##k | A_Read0 | ak(ak_##x##_REG_LSR_IMM); \
+    const u32 A_##x##_REG_ASR_IMM = A_Write12 | c | A_##k | A_Read0 | ak(ak_##x##_REG_ASR_IMM); \
+    const u32 A_##x##_REG_ROR_IMM = A_RRXReadC | A_Write12 | c | A_##k | A_Read0 | ak(ak_##x##_REG_ROR_IMM); \
+    const u32 A_##x##_REG_LSL_REG = A_Write12 | c | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG); \
+    const u32 A_##x##_REG_LSR_REG = A_Write12 | c | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG); \
+    const u32 A_##x##_REG_ASR_REG = A_Write12 | c | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG); \
+    const u32 A_##x##_REG_ROR_REG = A_Write12 | c | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG); \
     \
-    const u32 A_##x##_IMM_S = A_Write12 | A_##k | ak(ak_##x##_IMM_S); \
-    const u32 A_##x##_REG_LSL_IMM_S = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSL_IMM_S); \
-    const u32 A_##x##_REG_LSR_IMM_S = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSR_IMM_S); \
-    const u32 A_##x##_REG_ASR_IMM_S = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ASR_IMM_S); \
-    const u32 A_##x##_REG_ROR_IMM_S = A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ROR_IMM_S); \
-    const u32 A_##x##_REG_LSL_REG_S = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG_S); \
-    const u32 A_##x##_REG_LSR_REG_S = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG_S); \
-    const u32 A_##x##_REG_ASR_REG_S = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG_S); \
-    const u32 A_##x##_REG_ROR_REG_S = A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG_S);
-
-A_IMPLEMENT_ALU_OP(AND,BIOP)
-A_IMPLEMENT_ALU_OP(EOR,BIOP)
-A_IMPLEMENT_ALU_OP(SUB,BIOP)
-A_IMPLEMENT_ALU_OP(RSB,BIOP)
-A_IMPLEMENT_ALU_OP(ADD,BIOP)
-A_IMPLEMENT_ALU_OP(ADC,BIOP)
-A_IMPLEMENT_ALU_OP(SBC,BIOP)
-A_IMPLEMENT_ALU_OP(RSC,BIOP)
-A_IMPLEMENT_ALU_OP(ORR,BIOP)
-A_IMPLEMENT_ALU_OP(MOV,MONOOP)
-A_IMPLEMENT_ALU_OP(BIC,BIOP)
-A_IMPLEMENT_ALU_OP(MVN,MONOOP)
+    const u32 A_##x##_IMM_S = A_SetNZ | c | A_##a##_IMM | A_Write12 | A_##k | ak(ak_##x##_IMM_S); \
+    const u32 A_##x##_REG_LSL_IMM_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSL_IMM_S); \
+    const u32 A_##x##_REG_LSR_IMM_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_LSR_IMM_S); \
+    const u32 A_##x##_REG_ASR_IMM_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ASR_IMM_S); \
+    const u32 A_##x##_REG_ROR_IMM_S = A_RRXReadC | A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | ak(ak_##x##_REG_ROR_IMM_S); \
+    const u32 A_##x##_REG_LSL_REG_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG_S); \
+    const u32 A_##x##_REG_LSR_REG_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG_S); \
+    const u32 A_##x##_REG_ASR_REG_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG_S); \
+    const u32 A_##x##_REG_ROR_REG_S = A_SetNZ | c | A_##a | A_Write12 | A_##k | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG_S);
+
+A_IMPLEMENT_ALU_OP(AND,BIOP,LOGIC,0)
+A_IMPLEMENT_ALU_OP(EOR,BIOP,LOGIC,0)
+A_IMPLEMENT_ALU_OP(SUB,BIOP,ARITH,0)
+A_IMPLEMENT_ALU_OP(RSB,BIOP,ARITH,0)
+A_IMPLEMENT_ALU_OP(ADD,BIOP,ARITH,0)
+A_IMPLEMENT_ALU_OP(ADC,BIOP,ARITH,A_ReadC)
+A_IMPLEMENT_ALU_OP(SBC,BIOP,ARITH,A_ReadC)
+A_IMPLEMENT_ALU_OP(RSC,BIOP,ARITH,A_ReadC)
+A_IMPLEMENT_ALU_OP(ORR,BIOP,LOGIC,0)
+A_IMPLEMENT_ALU_OP(MOV,MONOOP,LOGIC,0)
+A_IMPLEMENT_ALU_OP(BIC,BIOP,LOGIC,0)
+A_IMPLEMENT_ALU_OP(MVN,MONOOP,LOGIC,0)
 
 const u32 A_MOV_REG_LSL_IMM_DBG = A_MOV_REG_LSL_IMM;
 
-#define A_IMPLEMENT_ALU_TEST(x) \
-    const u32 A_##x##_IMM = A_Read16 | A_Read0 | ak(ak_##x##_IMM); \
-    const u32 A_##x##_REG_LSL_IMM = A_Read16 | A_Read0 | ak(ak_##x##_REG_LSL_IMM); \
-    const u32 A_##x##_REG_LSR_IMM = A_Read16 | A_Read0 | ak(ak_##x##_REG_LSR_IMM); \
-    const u32 A_##x##_REG_ASR_IMM = A_Read16 | A_Read0 | ak(ak_##x##_REG_ASR_IMM); \
-    const u32 A_##x##_REG_ROR_IMM = A_Read16 | A_Read0 | ak(ak_##x##_REG_ROR_IMM); \
-    const u32 A_##x##_REG_LSL_REG = A_Read16 | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG); \
-    const u32 A_##x##_REG_LSR_REG = A_Read16 | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG); \
-    const u32 A_##x##_REG_ASR_REG = A_Read16 | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG); \
-    const u32 A_##x##_REG_ROR_REG = A_Read16 | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG);
-
-A_IMPLEMENT_ALU_TEST(TST)
-A_IMPLEMENT_ALU_TEST(TEQ)
-A_IMPLEMENT_ALU_TEST(CMP)
-A_IMPLEMENT_ALU_TEST(CMN)
-
-const u32 A_MUL = A_Write16 | A_Read0 | A_Read8 | ak(ak_MUL);
-const u32 A_MLA = A_Write16 | A_Read0 | A_Read8 | A_Read12 | ak(ak_MLA);
-const u32 A_UMULL = A_Write16 | A_Write12 | A_Read0 | A_Read8 | ak(ak_UMULL);
-const u32 A_UMLAL = A_Write16 | A_Write12 | A_Read16 | A_Read12 | A_Read0 | A_Read8 | ak(ak_UMLAL);
-const u32 A_SMULL = A_Write16 | A_Write12 | A_Read0 | A_Read8 | ak(ak_SMULL);
-const u32 A_SMLAL = A_Write16 | A_Write12 | A_Read16 | A_Read12 | A_Read0 | A_Read8 | ak(ak_SMLAL);
+#define A_IMPLEMENT_ALU_TEST(x,a) \
+    const u32 A_##x##_IMM = A_SetNZ | A_Read16 | A_##a | A_Read0 | ak(ak_##x##_IMM); \
+    const u32 A_##x##_REG_LSL_IMM = A_SetNZ | A_Read16 | A_##a | A_Read0 | ak(ak_##x##_REG_LSL_IMM); \
+    const u32 A_##x##_REG_LSR_IMM = A_SetNZ | A_Read16 | A_##a | A_Read0 | ak(ak_##x##_REG_LSR_IMM); \
+    const u32 A_##x##_REG_ASR_IMM = A_SetNZ | A_Read16 | A_##a | A_Read0 | ak(ak_##x##_REG_ASR_IMM); \
+    const u32 A_##x##_REG_ROR_IMM = A_RRXReadC | A_SetNZ | A_Read16 | A_##a | A_Read0 | ak(ak_##x##_REG_ROR_IMM); \
+    const u32 A_##x##_REG_LSL_REG = A_SetNZ | A_Read16 | A_##a | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSL_REG); \
+    const u32 A_##x##_REG_LSR_REG = A_SetNZ | A_Read16 | A_##a | A_Read0 | A_Read8 | ak(ak_##x##_REG_LSR_REG); \
+    const u32 A_##x##_REG_ASR_REG = A_SetNZ | A_Read16 | A_##a | A_Read0 | A_Read8 | ak(ak_##x##_REG_ASR_REG); \
+    const u32 A_##x##_REG_ROR_REG = A_SetNZ | A_Read16 | A_##a | A_Read0 | A_Read8 | ak(ak_##x##_REG_ROR_REG);
+
+A_IMPLEMENT_ALU_TEST(TST,LOGIC)
+A_IMPLEMENT_ALU_TEST(TEQ,LOGIC)
+A_IMPLEMENT_ALU_TEST(CMP,ARITH)
+A_IMPLEMENT_ALU_TEST(CMN,ARITH)
+
+const u32 A_MUL = A_MulFlags | A_Write16 | A_Read0 | A_Read8 | ak(ak_MUL);
+const u32 A_MLA = A_MulFlags | A_Write16 | A_Read0 | A_Read8 | A_Read12 | ak(ak_MLA);
+const u32 A_UMULL = A_MulFlags | A_Write16 | A_Write12 | A_Read0 | A_Read8 | ak(ak_UMULL);
+const u32 A_UMLAL = A_MulFlags | A_Write16 | A_Write12 | A_Read16 | A_Read12 | A_Read0 | A_Read8 | ak(ak_UMLAL);
+const u32 A_SMULL = A_MulFlags | A_Write16 | A_Write12 | A_Read0 | A_Read8 | ak(ak_SMULL);
+const u32 A_SMLAL = A_MulFlags | A_Write16 | A_Write12 | A_Read16 | A_Read12 | A_Read0 | A_Read8 | ak(ak_SMLAL);
 const u32 A_SMLAxy = A_Write16 | A_Read0 | A_Read8 | A_Read12 | ak(ak_SMLALxy);
 const u32 A_SMLAWy = A_Write16 | A_Read0 | A_Read8 | A_Read12 | ak(ak_SMLAWy);
 const u32 A_SMULWy = A_Write16 | A_Read0 | A_Read8 | ak(ak_SMULWy);
@@ -161,7 +173,7 @@ const u32 A_SVC = A_BranchAlways | A_Link | ak(ak_SVC);
 
 // THUMB
 
-#define tk(x) ((x) << 16)
+#define tk(x) ((x) << 20)
 
 enum {
     T_Read0         = 1 << 0,
@@ -183,42 +195,47 @@ enum {
     T_ReadR14       = 1 << 13,
     T_WriteR14      = 1 << 14,
 
-    T_PopPC         = 1 << 15
+    T_PopPC         = 1 << 15,
+
+    T_SetNZ         = 1 << 16,
+    T_SetCV         = 1 << 17,
+    T_SetMaybeC     = 1 << 18,
+    T_ReadC         = 1 << 19
 };
 
-const u32 T_LSL_IMM = T_Write0 | T_Read3 | tk(tk_LSL_IMM);
-const u32 T_LSR_IMM = T_Write0 | T_Read3 | tk(tk_LSR_IMM);
-const u32 T_ASR_IMM = T_Write0 | T_Read3 | tk(tk_ASR_IMM);
-
-const u32 T_ADD_REG_ = T_Write0 | T_Read3 | T_Read6 | tk(tk_ADD_REG_);
-const u32 T_SUB_REG_ = T_Write0 | T_Read3 | T_Read6 | tk(tk_SUB_REG_);
-const u32 T_ADD_IMM_ = T_Write0 | T_Read3 | tk(tk_ADD_IMM_);
-const u32 T_SUB_IMM_ = T_Write0 | T_Read3 | tk(tk_SUB_IMM_);
-
-const u32 T_MOV_IMM = T_Write8 | tk(tk_MOV_IMM);
-const u32 T_CMP_IMM = T_Write8 | tk(tk_CMP_IMM);
-const u32 T_ADD_IMM = T_Write8 | T_Read8 | tk(tk_ADD_IMM);
-const u32 T_SUB_IMM = T_Write8 | T_Read8 | tk(tk_SUB_IMM);
-
-const u32 T_AND_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_AND_REG);
-const u32 T_EOR_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_EOR_REG);
-const u32 T_LSL_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_LSL_REG);
-const u32 T_LSR_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_LSR_REG);
-const u32 T_ASR_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_ASR_REG);
-const u32 T_ADC_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_ADC_REG);
-const u32 T_SBC_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_SBC_REG);
-const u32 T_ROR_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_ROR_REG);
-const u32 T_TST_REG = T_Read0 | T_Read3 | tk(tk_TST_REG);
-const u32 T_NEG_REG = T_Write0 | T_Read3 | tk(tk_NEG_REG);
-const u32 T_CMP_REG = T_Read0 | T_Read3 | tk(tk_CMP_REG);
-const u32 T_CMN_REG = T_Read0 | T_Read3 | tk(tk_CMN_REG);
-const u32 T_ORR_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_ORR_REG);
-const u32 T_MUL_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_MUL_REG);
-const u32 T_BIC_REG = T_Write0 | T_Read0 | T_Read3 | tk(tk_BIC_REG);
-const u32 T_MVN_REG = T_Write0 | T_Read3 | tk(tk_MVN_REG);
+const u32 T_LSL_IMM = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read3 | tk(tk_LSL_IMM);
+const u32 T_LSR_IMM = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read3 | tk(tk_LSR_IMM);
+const u32 T_ASR_IMM = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read3 | tk(tk_ASR_IMM);
+
+const u32 T_ADD_REG_ = T_SetNZ | T_SetCV | T_Write0 | T_Read3 | T_Read6 | tk(tk_ADD_REG_);
+const u32 T_SUB_REG_ = T_SetNZ | T_SetCV | T_Write0 | T_Read3 | T_Read6 | tk(tk_SUB_REG_);
+const u32 T_ADD_IMM_ = T_SetNZ | T_SetCV | T_Write0 | T_Read3 | tk(tk_ADD_IMM_);
+const u32 T_SUB_IMM_ = T_SetNZ | T_SetCV | T_Write0 | T_Read3 | tk(tk_SUB_IMM_);
+
+const u32 T_MOV_IMM = T_SetNZ | T_Write8 | tk(tk_MOV_IMM);
+const u32 T_CMP_IMM = T_SetNZ | T_SetCV | T_Write8 | tk(tk_CMP_IMM);
+const u32 T_ADD_IMM = T_SetNZ | T_SetCV | T_Write8 | T_Read8 | tk(tk_ADD_IMM);
+const u32 T_SUB_IMM = T_SetNZ | T_SetCV | T_Write8 | T_Read8 | tk(tk_SUB_IMM);
+
+const u32 T_AND_REG = T_SetNZ | T_Write0 | T_Read0 | T_Read3 | tk(tk_AND_REG);
+const u32 T_EOR_REG = T_SetNZ | T_Write0 | T_Read0 | T_Read3 | tk(tk_EOR_REG);
+const u32 T_LSL_REG = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read0 | T_Read3 | tk(tk_LSL_REG);
+const u32 T_LSR_REG = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read0 | T_Read3 | tk(tk_LSR_REG);
+const u32 T_ASR_REG = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read0 | T_Read3 | tk(tk_ASR_REG);
+const u32 T_ADC_REG = T_ReadC | T_SetNZ | T_SetCV | T_Write0 | T_Read0 | T_Read3 | tk(tk_ADC_REG);
+const u32 T_SBC_REG = T_ReadC | T_SetNZ | T_SetCV | T_Write0 | T_Read0 | T_Read3 | tk(tk_SBC_REG);
+const u32 T_ROR_REG = T_SetNZ | T_SetMaybeC | T_Write0 | T_Read0 | T_Read3 | tk(tk_ROR_REG);
+const u32 T_TST_REG = T_SetNZ | T_Read0 | T_Read3 | tk(tk_TST_REG);
+const u32 T_NEG_REG = T_SetNZ | T_SetCV | T_Write0 | T_Read3 | tk(tk_NEG_REG);
+const u32 T_CMP_REG = T_SetNZ | T_SetCV | T_Read0 | T_Read3 | tk(tk_CMP_REG);
+const u32 T_CMN_REG = T_SetNZ | T_SetCV | T_Read0 | T_Read3 | tk(tk_CMN_REG);
+const u32 T_ORR_REG = T_SetNZ | T_Write0 | T_Read0 | T_Read3 | tk(tk_ORR_REG);
+const u32 T_MUL_REG = T_SetNZ | T_Write0 | T_Read0 | T_Read3 | tk(tk_MUL_REG);
+const u32 T_BIC_REG = T_SetNZ | T_Write0 | T_Read0 | T_Read3 | tk(tk_BIC_REG);
+const u32 T_MVN_REG = T_SetNZ | T_Write0 | T_Read3 | tk(tk_MVN_REG);
 
 const u32 T_ADD_HIREG = T_WriteHi0 | T_ReadHi0 | T_ReadHi3 | tk(tk_ADD_HIREG);
-const u32 T_CMP_HIREG = T_ReadHi0 | T_ReadHi3 | tk(tk_CMP_HIREG);
+const u32 T_CMP_HIREG = T_SetNZ | T_SetCV | T_ReadHi0 | T_ReadHi3 | tk(tk_CMP_HIREG);
 const u32 T_MOV_HIREG = T_WriteHi0 | T_ReadHi3 | tk(tk_MOV_HIREG);
 
 const u32 T_ADD_PCREL = T_Write8 | tk(tk_ADD_PCREL);
@@ -268,10 +285,20 @@ const u32 T_SVC = T_BranchAlways | T_WriteR14 | tk(tk_SVC);
 
 Info Decode(bool thumb, u32 num, u32 instr)
 {
+    const u8 FlagsReadPerCond[7] = {
+        flag_Z,
+        flag_C,
+        flag_N,
+        flag_V,
+        flag_C | flag_Z,
+        flag_N | flag_V,
+        flag_Z | flag_N | flag_V};
+
     Info res = {0};
     if (thumb)
     {
         u32 data = THUMBInstrTable[(instr >> 6) & 0x3FF];
+        res.Kind = (data >> 20) & 0x3F;
 
         if (data & T_Read0)
             res.SrcRegs |= 1 << (instr & 0x7);
@@ -309,7 +336,18 @@ Info Decode(bool thumb, u32 num, u32 instr)
         if (data & T_PopPC && instr & (1 << 8))
             res.DstRegs |= 1 << 15;
 
-        res.Kind = (data >> 16) & 0x3F;
+        if (data & T_SetNZ)
+            res.WriteFlags |= flag_N | flag_Z;
+        if (data & T_SetCV)
+            res.WriteFlags |= flag_C | flag_V;
+        if (data & T_SetMaybeC)
+            res.WriteFlags |= flag_C << 4;
+        if (data & T_ReadC)
+            res.ReadFlags |= flag_C;
+
+        if (res.Kind == tk_BCOND)
+            res.ReadFlags |= FlagsReadPerCond[(instr >> 9) & 0x7];
+
         res.EndBlock = res.Branches();
 
         return res;
@@ -323,7 +361,7 @@ Info Decode(bool thumb, u32 num, u32 instr)
         if (data & A_UnkOnARM7 && num != 0)
             data = A_UNK;
 
-        res.Kind = (data >> 13) & 0x1FF;
+        res.Kind = (data >> 18) & 0x1FF;
 
         if (res.Kind == ak_MCR)
         {
@@ -382,6 +420,26 @@ Info Decode(bool thumb, u32 num, u32 instr)
         if (res.Kind == ak_LDM)
             res.DstRegs |= instr & (1 << 15); // this is right
 
+        if (data & A_SetNZ)
+            res.WriteFlags |= flag_N | flag_Z;
+        if (data & A_SetCV)
+            res.WriteFlags |= flag_C | flag_V;
+        if (data & A_SetMaybeC)
+            res.WriteFlags |= flag_C << 4;
+        if ((data & A_MulFlags) && (instr & (1 << 20)))
+            res.WriteFlags |= flag_N | flag_Z;
+        if (data & A_ReadC)
+            res.ReadFlags |= flag_C;
+        if ((data & A_RRXReadC) && !((instr >> 7) & 0x1F))
+            res.ReadFlags |= flag_C;
+
+        if ((instr >> 28) < 0xE)
+        {
+            // make non conditional flag sets conditional
+            res.WriteFlags = res.WriteFlags | (res.WriteFlags << 4);
+            res.ReadFlags |= FlagsReadPerCond[instr >> 29];
+        }
+
         res.EndBlock |= res.Branches();
 
         return res;
diff --git a/src/ARM_InstrInfo.h b/src/ARM_InstrInfo.h
index 4fe9b10..5336837 100644
--- a/src/ARM_InstrInfo.h
+++ b/src/ARM_InstrInfo.h
@@ -215,11 +215,24 @@ enum
     tk_Count
 };
 
+enum
+{
+    flag_N = 1 << 3,
+    flag_Z = 1 << 2,
+    flag_C = 1 << 1,
+    flag_V = 1 << 0,
+};
+
 struct Info
 {
     u16 DstRegs, SrcRegs;
     u16 Kind;
 
+    u8 ReadFlags;
+    // lower 4 bits - set always
+    // upper 4 bits - might set flag
+    u8 WriteFlags;
+
     bool EndBlock;
     bool Branches()
     {
diff --git a/src/libui_sdl/main.cpp b/src/libui_sdl/main.cpp
index 0066668..c3db88d 100644
--- a/src/libui_sdl/main.cpp
+++ b/src/libui_sdl/main.cpp
@@ -2675,6 +2675,8 @@ void RecreateMainWindow(bool opengl)
 
 int main(int argc, char** argv)
 {
+    freopen("miauz.txt", "w", stdout);
+
     srand(time(NULL));
 
     printf("melonDS " MELONDS_VERSION "\n");