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/* This file is part of the dynarmic project.
* Copyright (c) 2020 MerryMage
* SPDX-License-Identifier: 0BSD
*/
#pragma once
#include <cstdint>
namespace Dynarmic {
enum class OptimizationFlag : std::uint32_t {
/// This optimization avoids dispatcher lookups by allowing emitted basic blocks to jump
/// directly to other basic blocks if the destination PC is predictable at JIT-time.
/// This is a safe optimization.
BlockLinking = 0x00000001,
/// This optimization avoids dispatcher lookups by emulating a return stack buffer. This
/// allows for function returns and syscall returns to be predicted at runtime.
/// This is a safe optimization.
ReturnStackBuffer = 0x00000002,
/// This optimization enables a two-tiered dispatch system.
/// A fast dispatcher (written in assembly) first does a look-up in a small MRU cache.
/// If this fails, it falls back to the usual slower dispatcher.
/// This is a safe optimization.
FastDispatch = 0x00000004,
/// This is an IR optimization. This optimization eliminates unnecessary emulated CPU state
/// context lookups.
/// This is a safe optimization.
GetSetElimination = 0x00000008,
/// This is an IR optimization. This optimization does constant propagation.
/// This is a safe optimization.
ConstProp = 0x00000010,
/// This is enables miscellaneous safe IR optimizations.
MiscIROpt = 0x00000020,
/// This is an UNSAFE optimization that reduces accuracy of fused multiply-add operations.
/// This unfuses fused instructions to improve performance on host CPUs without FMA support.
Unsafe_UnfuseFMA = 0x00010000,
/// This is an UNSAFE optimization that reduces accuracy of certain floating-point instructions.
/// This allows results of FRECPE and FRSQRTE to have **less** error than spec allows.
Unsafe_ReducedErrorFP = 0x00020000,
/// This is an UNSAFE optimization that causes floating-point instructions to not produce correct NaNs.
/// This may also result in inaccurate results when instructions are given certain special values.
Unsafe_InaccurateNaN = 0x00040000,
/// This is an UNSAFE optimization that causes ASIMD floating-point instructions to be run with incorrect
/// rounding modes. This may result in inaccurate results with all floating-point ASIMD instructions.
Unsafe_IgnoreStandardFPCRValue = 0x00080000,
/// This is an UNSAFE optimization that causes the global monitor to be ignored. This may
/// result in unexpected behaviour in multithreaded scenarios, including but not limited
/// to data races and deadlocks.
Unsafe_IgnoreGlobalMonitor = 0x00100000,
};
constexpr OptimizationFlag no_optimizations = static_cast<OptimizationFlag>(0);
constexpr OptimizationFlag all_safe_optimizations = static_cast<OptimizationFlag>(0x0000FFFF);
constexpr OptimizationFlag operator~(OptimizationFlag f) {
return static_cast<OptimizationFlag>(~static_cast<std::uint32_t>(f));
}
constexpr OptimizationFlag operator|(OptimizationFlag f1, OptimizationFlag f2) {
return static_cast<OptimizationFlag>(static_cast<std::uint32_t>(f1) | static_cast<std::uint32_t>(f2));
}
constexpr OptimizationFlag operator&(OptimizationFlag f1, OptimizationFlag f2) {
return static_cast<OptimizationFlag>(static_cast<std::uint32_t>(f1) & static_cast<std::uint32_t>(f2));
}
constexpr OptimizationFlag operator|=(OptimizationFlag& result, OptimizationFlag f) {
return result = (result | f);
}
constexpr OptimizationFlag operator&=(OptimizationFlag& result, OptimizationFlag f) {
return result = (result & f);
}
constexpr bool operator!(OptimizationFlag f) {
return f == no_optimizations;
}
} // namespace Dynarmic
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