Refactor the JIT to be object-oriented (#1879)

* Move TinyVector to a new file

- So it's less sensitive to #include ordering

* Forgot to include assert.h

* Refactor ARMJIT_Memory into an object

* Oops, forgot a declaration

* Refactor ARMJIT to be contained in an object

* Remove an unused function declaration

* Add a missing #include

* Remove a now-unused global

* Use ARMJIT_Memory's own memory access functions

* Fix some omissions in the ARM JIT

* Move libandroid to be a member of ARMJIT_Memory instead of a global

* Default-initialize most fields in ARMJIT_Compiler.h

* Define NOOP_IF_NO_JIT

* Finish refactoring the JIT to be object-oriented

src/JitBlock.h

@@ -0,0 +1,61 @@
+/*
+    Copyright 2016-2023 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef MELONDS_JITBLOCK_H
+#define MELONDS_JITBLOCK_H
+
+#include "types.h"
+#include "TinyVector.h"
+
+namespace ARMJIT
+{
+typedef void (*JitBlockEntry)();
+
+class JitBlock
+{
+public:
+    JitBlock(u32 num, u32 literalHash, u32 numAddresses, u32 numLiterals)
+    {
+        Num = num;
+        NumAddresses = numAddresses;
+        NumLiterals = numLiterals;
+        Data.SetLength(numAddresses * 2 + numLiterals);
+    }
+
+    u32 StartAddr;
+    u32 StartAddrLocal;
+    u32 InstrHash, LiteralHash;
+    u8 Num;
+    u16 NumAddresses;
+    u16 NumLiterals;
+
+    JitBlockEntry EntryPoint;
+
+    u32* AddressRanges()
+    { return &Data[0]; }
+    u32* AddressMasks()
+    { return &Data[NumAddresses]; }
+    u32* Literals()
+    { return &Data[NumAddresses * 2]; }
+
+private:
+    TinyVector<u32> Data;
+};
+}
+
+#endif //MELONDS_JITBLOCK_H