35 lines
1.3 KiB
C++
35 lines
1.3 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 <cstring>
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#include "backend/x64/block_of_code.h"
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#include "backend/x64/constant_pool.h"
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#include "common/assert.h"
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namespace Dynarmic::BackendX64 {
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ConstantPool::ConstantPool(BlockOfCode& code, size_t size) : code(code), pool_size(size) {
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code.int3();
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code.align(align_size);
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pool_begin = reinterpret_cast<u8*>(code.AllocateFromCodeSpace(size));
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current_pool_ptr = pool_begin;
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}
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Xbyak::Address ConstantPool::GetConstant(const Xbyak::AddressFrame& frame, u64 lower, u64 upper) {
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const auto constant = std::make_tuple(lower, upper);
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auto iter = constant_info.find(constant);
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if (iter == constant_info.end()) {
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ASSERT(static_cast<size_t>(current_pool_ptr - pool_begin) < pool_size);
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std::memcpy(current_pool_ptr, &lower, sizeof(u64));
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std::memcpy(current_pool_ptr + sizeof(u64), &upper, sizeof(u64));
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iter = constant_info.emplace(constant, current_pool_ptr).first;
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current_pool_ptr += align_size;
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}
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return frame[code.rip + iter->second];
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}
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} // namespace Dynarmic::BackendX64
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