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