dynarmic/src/backend_x64/constant_pool.cpp

34 lines
1.1 KiB
C++

/* This file is part of the dynarmic project.
* Copyright (c) 2016 MerryMage
* This software may be used and distributed according to the terms of the GNU
* General Public License version 2 or any later version.
*/
#include <cstring>
#include "backend_x64/block_of_code.h"
#include "backend_x64/constant_pool.h"
#include "common/assert.h"
namespace Dynarmic::BackendX64 {
ConstantPool::ConstantPool(BlockOfCode& code, size_t size) : code(code), pool_size(size) {
code.int3();
code.align(align_size);
pool_begin = reinterpret_cast<u8*>(code.AllocateFromCodeSpace(size));
std::memset(pool_begin, 0, size);
current_pool_ptr = pool_begin;
}
Xbyak::Address ConstantPool::GetConstant(u64 constant) {
auto iter = constant_info.find(constant);
if (iter == constant_info.end()) {
ASSERT(static_cast<size_t>(current_pool_ptr - pool_begin) < pool_size);
std::memcpy(current_pool_ptr, &constant, sizeof(u64));
iter = constant_info.emplace(constant, current_pool_ptr).first;
current_pool_ptr += align_size;
}
return code.xword[code.rip + iter->second];
}
} // namespace Dynarmic::BackendX64