rsx/fp: Use CFG for fragment program

rpcs3/Emu/RSX/Program/FragmentProgramDecompiler.cpp

@@ -1297,7 +1297,7 @@ bool FragmentProgramDecompiler::handle_tex_srb(u32 opcode)
 
 std::string FragmentProgramDecompiler::Decompile()
 {
-	auto data = static_cast<be_t<u32>*>(m_prog.get_data());
+	const auto graph = rsx::assembler::deconstruct_fragment_program(m_prog);
 	m_size = 0;
 	m_location = 0;
 	m_loop_count = 0;
@@ -1314,7 +1314,11 @@ std::string FragmentProgramDecompiler::Decompile()
 
 	int forced_unit = FORCE_NONE;
 
-	while (true)
+	for (const auto &block : graph.blocks)
+	{
+		// TODO: Handle block prologue if any
+
+		for (const auto& inst : block.instructions)
 		{
 			for (auto found = std::find(m_end_offsets.begin(), m_end_offsets.end(), m_size);
 				found != m_end_offsets.end();
@@ -1338,10 +1342,10 @@ std::string FragmentProgramDecompiler::Decompile()
 				m_code_level++;
 			}
 
-		dst.HEX = GetData(data[0]);
-		src0.HEX = GetData(data[1]);
-		src1.HEX = GetData(data[2]);
-		src2.HEX = GetData(data[3]);
+			dst.HEX = inst.bytecode[0];
+			src0.HEX = inst.bytecode[1];
+			src1.HEX = inst.bytecode[2];
+			src2.HEX = inst.bytecode[3];
 
 			m_offset = 4 * sizeof(u32);
 			opflags = 0;
@@ -1444,11 +1448,12 @@ std::string FragmentProgramDecompiler::Decompile()
 			}
 
 			m_size += m_offset;
+			ensure((m_offset & 15) == 0); // Must be aligned to 16 bytes
 
 			if (dst.end) break;
+		}
 
-		ensure(m_offset % sizeof(u32) == 0);
-		data += m_offset / sizeof(u32);
+		// TODO: Handle block epilogue if needed
 	}
 
 	while (m_code_level > 1)