PPU LLVM: upgrade to GHC call conv

Get rid of some global variables.
Implement ppu_escape (unused yet).
Bump PPU cache version to v4.

rpcs3/Emu/Cell/PPUFunction.cpp

@@ -1,5 +1,6 @@
 #include "stdafx.h"
 #include "PPUFunction.h"
+#include "Utilities/JIT.h"
 
 #include "PPUModule.h"
 
@@ -1888,7 +1889,7 @@ extern std::string ppu_get_variable_name(const std::string& _module, u32 vnid)
 	return fmt::format("0x%08X", vnid);
 }
 
-std::vector<ppu_function_t>& ppu_function_manager::access()
+std::vector<ppu_function_t>& ppu_function_manager::access(bool ghc)
 {
 	static std::vector<ppu_function_t> list
 	{
@@ -1907,15 +1908,43 @@ std::vector<ppu_function_t>& ppu_function_manager::access()
 		},
 	};
 
-	return list;
+	static std::vector<ppu_function_t> list_ghc
+	{
+		build_function_asm<ppu_function_t>([](asmjit::X86Assembler& c, auto& args)
+		{
+			using namespace asmjit;
+
+			c.mov(args[0], x86::rbp);
+			c.jmp(imm_ptr(list[0]));
+		}),
+		build_function_asm<ppu_function_t>([](asmjit::X86Assembler& c, auto& args)
+		{
+			using namespace asmjit;
+
+			c.mov(args[0], x86::rbp);
+			c.jmp(imm_ptr(list[1]));
+		}),
+	};
+
+	return ghc ? list_ghc : list;
 }
 
 u32 ppu_function_manager::add_function(ppu_function_t function)
 {
 	auto& list = access();
+	auto& list2 = access(true);
 
 	list.push_back(function);
 
+	// Generate trampoline
+	list2.push_back(build_function_asm<ppu_function_t>([&](asmjit::X86Assembler& c, auto& args)
+	{
+		using namespace asmjit;
+
+		c.mov(args[0], x86::rbp);
+		c.jmp(imm_ptr(function));
+	}));
+
 	return ::size32(list) - 1;
 }
 

rpcs3/Emu/Cell/PPUFunction.h

@@ -256,7 +256,7 @@ class ppu_function_manager
 	};
 
 	// Access global function list
-	static std::vector<ppu_function_t>& access();
+	static std::vector<ppu_function_t>& access(bool ghc = false);
 
 	static u32 add_function(ppu_function_t function);
 
@@ -276,9 +276,9 @@ class ppu_function_manager
 	}
 
 	// Read all registered functions
-	static inline const auto& get()
+	static inline const auto& get(bool llvm = false)
 	{
-		return access();
+		return access(llvm);
 	}
 
 	static inline u32 func_addr(u32 index)

rpcs3/Emu/Cell/PPUModule.cpp

@@ -244,7 +244,7 @@ static void ppu_initialize_modules(ppu_linkage_info* link)
 	};
 
 	// Initialize double-purpose fake OPD array for HLE functions
-	const auto& hle_funcs = ppu_function_manager::get();
+	const auto& hle_funcs = ppu_function_manager::get(g_cfg.core.ppu_decoder == ppu_decoder_type::llvm);
 
 	// Allocate memory for the array (must be called after fixed allocations)
 	ppu_function_manager::addr = vm::alloc(::size32(hle_funcs) * 8, vm::main);