(unofficial mirror fork of merryhime/dynarmic)
0ea99b7d59
It's possible to fold cases of exclusive OR operations if they can be known to be an identity operation, or if both operands happen to be known immediates, in which case we can just store the result of the exclusive-OR directly. |
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.travis | ||
CMakeModules | ||
docs | ||
externals | ||
include/dynarmic | ||
src | ||
tests | ||
.appveyor.yml | ||
.gitmodules | ||
.travis.yml | ||
CMakeLists.txt | ||
LICENSE.txt | ||
README.md |
Dynarmic
A dynamic recompiler for ARM.
Supported guest architectures
- ARMv6K
- 64-bit ARMv8
Supported host architectures
- x86-64
There are no plans to support x86-32.
Documentation
Design documentation can be found at docs/Design.md.
Plans
Near-term
- Complete ARMv8 support
Medium-term
- Optimizations
Long-term
- ARMv7A guest support
- ARMv5 guest support
- ARMv8 host support
Usage Example
The below is a minimal example. Bring-your-own memory system.
#include <array>
#include <cstdint>
#include <cstdio>
#include <exception>
#include <dynarmic/A32/a32.h>
#include <dynarmic/A32/config.h>
using u8 = std::uint8_t;
using u16 = std::uint16_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;
class MyEnvironment final : public Dynarmic::A32::UserCallbacks {
public:
u64 ticks_left = 0;
std::array<u8, 2048> memory{};
u8 MemoryRead8(u32 vaddr) override {
if (vaddr >= memory.size()) {
return 0;
}
return memory[vaddr];
}
u16 MemoryRead16(u32 vaddr) override {
return u16(MemoryRead8(vaddr)) | u16(MemoryRead8(vaddr + 1)) << 8;
}
u32 MemoryRead32(u32 vaddr) override {
return u32(MemoryRead16(vaddr)) | u32(MemoryRead16(vaddr + 2)) << 16;
}
u64 MemoryRead64(u32 vaddr) override {
return u64(MemoryRead32(vaddr)) | u64(MemoryRead32(vaddr + 4)) << 32;
}
void MemoryWrite8(u32 vaddr, u8 value) override {
if (vaddr >= memory.size()) {
return;
}
memory[vaddr] = value;
}
void MemoryWrite16(u32 vaddr, u16 value) override {
MemoryWrite8(vaddr, u8(value));
MemoryWrite8(vaddr + 1, u8(value >> 8));
}
void MemoryWrite32(u32 vaddr, u32 value) override {
MemoryWrite16(vaddr, u16(value));
MemoryWrite16(vaddr + 2, u16(value >> 16));
}
void MemoryWrite64(u32 vaddr, u64 value) override {
MemoryWrite32(vaddr, u32(value));
MemoryWrite32(vaddr + 4, u32(value >> 32));
}
void InterpreterFallback(u32 pc, size_t num_instructions) override {
// This is never called in practice.
std::terminate();
}
void CallSVC(u32 swi) override {
// Do something.
}
void ExceptionRaised(u32 pc, Dynarmic::A32::Exception exception) override {
// Do something.
}
void AddTicks(u64 ticks) override {
if (ticks > ticks_left) {
ticks_left = 0;
return;
}
ticks_left -= ticks;
}
u64 GetTicksRemaining() override {
return ticks_left;
}
};
int main(int argc, char** argv) {
MyEnvironment env;
Dynarmic::A32::UserConfig user_config;
user_config.callbacks = &env;
Dynarmic::A32::Jit cpu{user_config};
// Execute at least 1 instruction.
// (Note: More than one instruction may be executed.)
env.ticks_left = 1;
// Write some code to memory.
env.MemoryWrite16(0, 0x0088); // lsls r0, r1, #2
env.MemoryWrite16(2, 0xE7FE); // b +#0 (infinite loop)
// Setup registers.
cpu.Regs()[0] = 1;
cpu.Regs()[1] = 2;
cpu.Regs()[15] = 0; // PC = 0
cpu.SetCpsr(0x00000030); // Thumb mode
// Execute!
cpu.Run();
// Here we would expect jit.Regs()[0] == 8
printf("R0: %u\n", jit.Regs()[0]);
return 0;
}