66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 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 "common/assert.h"
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#include "frontend/arm_types.h"
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#include "frontend/decoder/arm.h"
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#include "frontend/ir/ir.h"
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#include "frontend/ir_emitter.h"
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#include "frontend/translate.h"
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namespace Dynarmic {
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namespace Arm {
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namespace {
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struct ArmTranslatorVisitor final {
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explicit ArmTranslatorVisitor(LocationDescriptor descriptor) : ir(descriptor) {
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ASSERT_MSG(!descriptor.TFlag, "The processor must be in Arm mode");
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}
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IREmitter ir;
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bool TranslateThisInstruction() {
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ir.SetTerm(IR::Term::Interpret(ir.current_location));
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return false;
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}
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bool UnpredictableInstruction() {
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ASSERT_MSG(false, "UNPREDICTABLE");
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return false;
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}
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bool arm_UDF() {
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return TranslateThisInstruction();
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}
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};
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} // local namespace
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IR::Block TranslateArm(LocationDescriptor descriptor, MemoryRead32FuncType memory_read_32) {
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ArmTranslatorVisitor visitor{descriptor};
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bool should_continue = true;
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while (should_continue) {
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const u32 arm_pc = visitor.ir.current_location.arm_pc;
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const u32 arm_instruction = (*memory_read_32)(arm_pc);
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const auto decoder = DecodeArm<ArmTranslatorVisitor>(arm_instruction);
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if (decoder) {
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should_continue = decoder->call(visitor, arm_instruction);
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} else {
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should_continue = visitor.arm_UDF();
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}
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visitor.ir.current_location.arm_pc += 4;
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visitor.ir.block.cycle_count++;
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}
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return visitor.ir.block;
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}
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} // namespace Arm
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} // namespace Dynarmic
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