104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2013 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <alloy/backend/x64/lowering/lowering_table.h>
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#include <alloy/backend/x64/lowering/lowering_sequences.h>
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using namespace alloy;
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using namespace alloy::backend::x64;
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using namespace alloy::backend::x64::lowering;
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LoweringTable::LoweringTable(X64Backend* backend) :
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backend_(backend) {
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xe_zero_struct(lookup_, sizeof(lookup_));
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}
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LoweringTable::~LoweringTable() {
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for (size_t n = 0; n < XECOUNT(lookup_); n++) {
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auto entry = lookup_[n];
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while (entry) {
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auto next = entry->next;
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delete entry;
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entry = next;
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}
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}
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}
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int LoweringTable::Initialize() {
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RegisterSequences(this);
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return 0;
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}
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void LoweringTable::AddSequence(hir::Opcode starting_opcode, sequence_fn_t fn) {
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auto existing_entry = lookup_[starting_opcode];
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auto new_entry = new sequence_fn_entry_t();
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new_entry->fn = fn;
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new_entry->next = existing_entry;
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lookup_[starting_opcode] = new_entry;
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}
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int LoweringTable::Process(
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hir::HIRBuilder* hir_builder, lir::LIRBuilder* lir_builder) {
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lir_builder->EndBlock();
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// Translate all labels ahead of time.
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// We stash them on tags to make things easier later on.
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auto hir_block = hir_builder->first_block();
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while (hir_block) {
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auto hir_label = hir_block->label_head;
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while (hir_label) {
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auto lir_label = lir_builder->NewLabel(hir_label->name);
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hir_label->tag = lir_label;
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hir_label = hir_label->next;
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}
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hir_block = hir_block->next;
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}
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// Process each block.
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hir_block = hir_builder->first_block();
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while (hir_block) {
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// Force a new block.
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lir_builder->AppendBlock();
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// Mark labels.
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auto hir_label = hir_block->label_head;
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while (hir_label) {
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auto lir_label = (lir::LIRLabel*)hir_label->tag;
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lir_builder->MarkLabel(lir_label);
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hir_label = hir_label->next;
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}
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// Process instructions.
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auto hir_instr = hir_block->instr_head;
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while (hir_instr) {
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bool processed = false;
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auto entry = lookup_[hir_instr->opcode->num];
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while (entry) {
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if ((*entry->fn)(*lir_builder, hir_instr)) {
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processed = true;
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break;
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}
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entry = entry->next;
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}
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if (!processed) {
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// No sequence found!
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XELOGE("Unable to process HIR opcode %s", hir_instr->opcode->name);
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return 1;
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hir_instr = hir_instr->next;
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}
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}
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lir_builder->EndBlock();
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hir_block = hir_block->next;
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}
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return 0;
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} |