101 lines
3.9 KiB
C++
Executable File
101 lines
3.9 KiB
C++
Executable File
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 MerryMage
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* SPDX-License-Identifier: 0BSD
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*/
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#include <mcl/assert.hpp>
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#include "dynarmic/frontend/A32/a32_location_descriptor.h"
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#include "dynarmic/frontend/A32/a32_types.h"
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#include "dynarmic/frontend/A32/decoder/arm.h"
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#include "dynarmic/frontend/A32/decoder/asimd.h"
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#include "dynarmic/frontend/A32/decoder/vfp.h"
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#include "dynarmic/frontend/A32/translate/a32_translate.h"
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#include "dynarmic/frontend/A32/translate/conditional_state.h"
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#include "dynarmic/frontend/A32/translate/impl/a32_translate_impl.h"
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#include "dynarmic/frontend/A32/translate/translate_callbacks.h"
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#include "dynarmic/interface/A32/config.h"
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#include "dynarmic/ir/basic_block.h"
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namespace Dynarmic::A32 {
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IR::Block TranslateArm(LocationDescriptor descriptor, TranslateCallbacks* tcb, const TranslationOptions& options) {
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const bool single_step = descriptor.SingleStepping();
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IR::Block block{descriptor};
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TranslatorVisitor visitor{block, descriptor, options};
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bool should_continue = true;
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do {
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const u32 arm_pc = visitor.ir.current_location.PC();
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visitor.current_instruction_size = 4;
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if (const auto arm_instruction = tcb->MemoryReadCode(arm_pc)) {
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tcb->PreCodeTranslationHook(false, arm_pc, visitor.ir);
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if (const auto vfp_decoder = DecodeVFP<TranslatorVisitor>(*arm_instruction)) {
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should_continue = vfp_decoder->get().call(visitor, *arm_instruction);
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} else if (const auto asimd_decoder = DecodeASIMD<TranslatorVisitor>(*arm_instruction)) {
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should_continue = asimd_decoder->get().call(visitor, *arm_instruction);
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} else if (const auto decoder = DecodeArm<TranslatorVisitor>(*arm_instruction)) {
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should_continue = decoder->get().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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} else {
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should_continue = visitor.RaiseException(Exception::NoExecuteFault);
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}
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if (visitor.cond_state == ConditionalState::Break) {
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break;
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}
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visitor.ir.current_location = visitor.ir.current_location.AdvancePC(4);
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block.CycleCount()++;
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} while (should_continue && CondCanContinue(visitor.cond_state, visitor.ir) && !single_step);
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if (visitor.cond_state == ConditionalState::Translating || visitor.cond_state == ConditionalState::Trailing || single_step) {
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if (should_continue) {
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if (single_step) {
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visitor.ir.SetTerm(IR::Term::LinkBlock{visitor.ir.current_location});
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} else {
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visitor.ir.SetTerm(IR::Term::LinkBlockFast{visitor.ir.current_location});
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}
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}
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}
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ASSERT_MSG(block.HasTerminal(), "Terminal has not been set");
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block.SetEndLocation(visitor.ir.current_location);
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return block;
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}
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bool TranslateSingleArmInstruction(IR::Block& block, LocationDescriptor descriptor, u32 arm_instruction) {
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TranslatorVisitor visitor{block, descriptor, {}};
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// TODO: Proper cond handling
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bool should_continue = true;
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if (const auto vfp_decoder = DecodeVFP<TranslatorVisitor>(arm_instruction)) {
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should_continue = vfp_decoder->get().call(visitor, arm_instruction);
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} else if (const auto asimd_decoder = DecodeASIMD<TranslatorVisitor>(arm_instruction)) {
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should_continue = asimd_decoder->get().call(visitor, arm_instruction);
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} else if (const auto decoder = DecodeArm<TranslatorVisitor>(arm_instruction)) {
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should_continue = decoder->get().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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// TODO: Feedback resulting cond status to caller somehow.
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visitor.ir.current_location = visitor.ir.current_location.AdvancePC(4);
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block.CycleCount()++;
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block.SetEndLocation(visitor.ir.current_location);
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return should_continue;
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}
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} // namespace Dynarmic::A32
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