A64: Optimization: Merge interpret blocks

src/ir_opt/a64_merge_interpret_blocks.cpp

@@ -0,0 +1,61 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#include <array>
+
+#include <boost/variant/get.hpp>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "dynarmic/A64/config.h"
+#include "frontend/A64/location_descriptor.h"
+#include "frontend/A64/translate/translate.h"
+#include "frontend/ir/basic_block.h"
+#include "ir_opt/passes.h"
+
+namespace Dynarmic {
+namespace Optimization {
+
+void A64MergeInterpretBlocksPass(IR::Block& block, A64::UserCallbacks* cb) {
+    const auto is_interpret_instruction = [cb](A64::LocationDescriptor location) {
+        const u32 instruction = cb->MemoryReadCode(location.PC());
+
+        IR::Block new_block{location};
+        A64::TranslateSingleInstruction(new_block, location, instruction);
+
+        if (!new_block.Instructions().empty())
+            return false;
+
+        const IR::Terminal terminal = new_block.GetTerminal();
+        if (auto term = boost::get<IR::Term::Interpret>(&terminal)) {
+            printf("INTERPET %08x \\x%02x\\x%02x\\x%02x\\x%02x \n", instruction, u8(instruction >> 0), u8(instruction >> 8), u8(instruction >> 16), u8(instruction >> 24));
+            return term->next == location;
+        }
+
+        return false;
+    };
+
+    IR::Terminal terminal = block.GetTerminal();
+    auto term = boost::get<IR::Term::Interpret>(&terminal);
+    if (!term)
+        return;
+
+    A64::LocationDescriptor location{term->next};
+    size_t num_instructions = 1;
+
+    while (is_interpret_instruction(location.AdvancePC(static_cast<int>(num_instructions * 4)))) {
+        num_instructions++;
+    }
+
+    printf("%zu\n", num_instructions);
+
+    term->num_instructions = num_instructions;
+    block.ReplaceTerminal(terminal);
+    block.CycleCount() += num_instructions - 1;
+}
+
+} // namespace Optimization
+} // namespace Dynarmic