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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <bitset>
#include <string>
#include <vector>
#include "common/bit_field.h"
#include "common/common_types.h"
namespace Shader::IR {
class Inst;
class Value;
enum class Type;
} // namespace Shader::IR
namespace Shader::Backend::GLSL {
enum class GlslVarType : u32 {
U1,
F16x2,
S32,
U32,
F32,
S64,
U64,
F64,
U32x2,
F32x2,
U32x3,
F32x3,
U32x4,
F32x4,
Void,
};
struct Id {
union {
u32 raw;
BitField<0, 1, u32> is_valid;
BitField<1, 4, GlslVarType> type;
BitField<5, 27, u32> index;
};
bool operator==(Id rhs) const noexcept {
return raw == rhs.raw;
}
bool operator!=(Id rhs) const noexcept {
return !operator==(rhs);
}
};
static_assert(sizeof(Id) == sizeof(u32));
class VarAlloc {
public:
static constexpr size_t NUM_VARS = 511;
struct UseTracker {
size_t num_used{};
std::bitset<NUM_VARS> var_use{};
bool uses_temp{};
};
/// Used for explicit usages of variables, may revert to temporaries
std::string Define(IR::Inst& inst, GlslVarType type);
std::string Define(IR::Inst& inst, IR::Type type);
/// Used to assign variables used by the IR. May return a blank string if
/// the instruction's result is unused in the IR.
std::string AddDefine(IR::Inst& inst, GlslVarType type);
std::string PhiDefine(IR::Inst& inst, IR::Type type);
std::string Consume(const IR::Value& value);
std::string ConsumeInst(IR::Inst& inst);
std::string GetGlslType(GlslVarType type) const;
std::string GetGlslType(IR::Type type) const;
const UseTracker& GetUseTracker(GlslVarType type) const;
std::string Representation(u32 index, GlslVarType type) const;
private:
GlslVarType RegType(IR::Type type) const;
Id Alloc(GlslVarType type);
void Free(Id id);
UseTracker& GetUseTracker(GlslVarType type);
std::string Representation(Id id) const;
UseTracker var_bool{};
UseTracker var_f16x2{};
UseTracker var_s32{};
UseTracker var_u32{};
UseTracker var_u32x2{};
UseTracker var_u32x3{};
UseTracker var_u32x4{};
UseTracker var_f32{};
UseTracker var_f32x2{};
UseTracker var_f32x3{};
UseTracker var_f32x4{};
UseTracker var_u64{};
UseTracker var_s64{};
UseTracker var_f64{};
};
} // namespace Shader::Backend::GLSL
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