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[dynarmic] add current code page cache (#3459)

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should make JIT translation a bit faster - especially for non-fastmem
test if thumb still werks

previously:
we read 32-bits one by one, and do translation **for each u32 we read**

now:
one big read of 4096 bytes (aligned of course), only 1 VAddr translation

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3459
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>
This commit is contained in:
lizzie 2026-02-12 02:14:50 +01:00 • committed by crueter
parent e46576b4c3
commit c263b6af6f
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GPG key ID: 425ACD2D4830EBC6
7 changed files with 59 additions and 11 deletions
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18
src/core/hle/service/jit/jit_context.cpp
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@ -1,4 +1,4 @@
// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@ -10,6 +10,7 @@
#include <boost/icl/interval_set.hpp>
#include <dynarmic/interface/A64/a64.h>
#include <dynarmic/interface/A64/config.h>
#include <dynarmic/interface/code_page.h>
#include "common/alignment.h"
#include "common/common_funcs.h"
@ -46,6 +47,15 @@ public:
: memory{memory_}, local_memory{local_memory_},
mapped_ranges{mapped_ranges_}, parent{parent_} {}
std::optional<std::uint32_t> MemoryReadCode(VAddr vaddr) override {
static_assert(Core::Memory::YUZU_PAGESIZE == Dynarmic::CODE_PAGE_SIZE);
auto const aligned_vaddr = vaddr & ~Core::Memory::YUZU_PAGEMASK;
if (last_code_addr != aligned_vaddr) {
cached_code_page = ReadMemory<Dynarmic::CodePage>(aligned_vaddr);
last_code_addr = aligned_vaddr;
}
return cached_code_page.inst[(vaddr & Core::Memory::YUZU_PAGEMASK) / sizeof(u32)];
}
u8 MemoryRead8(u64 vaddr) override {
return ReadMemory<u8>(vaddr);
}
@ -116,8 +126,7 @@ public:
return 0;
}
template <class T>
T ReadMemory(u64 vaddr) {
template<typename T> T ReadMemory(u64 vaddr) {
T ret{};
if (boost::icl::contains(mapped_ranges, vaddr)) {
memory.ReadBlock(vaddr, &ret, sizeof(T));
@ -146,6 +155,9 @@ private:
std::vector<u8>& local_memory;
IntervalSet& mapped_ranges;
JITContextImpl& parent;
Dynarmic::CodePage cached_code_page;
u64 last_code_addr = 0;
};
class JITContextImpl {