// Copyright 2015 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <cstddef>
#include <utility>
#include <vector>
#include <nihstro/shader_bytecode.h>
#include <xbyak.h>
#include "common/bit_set.h"
#include "common/common_types.h"
#include "common/x64/emitter.h"
#include "video_core/shader/shader.h"
using nihstro::Instruction;
using nihstro::OpCode;
using nihstro::SwizzlePattern;
namespace Pica {
namespace Shader {
/// Memory allocated for each compiled shader (64Kb)
constexpr size_t MAX_SHADER_SIZE = 1024 * 64;
/**
* This class implements the shader JIT compiler. It recompiles a Pica shader program into x86_64
* code that can be executed on the host machine directly.
*/
class JitShader : public Xbyak::CodeGenerator {
public:
JitShader();
void Run(const ShaderSetup& setup, UnitState& state, unsigned offset) const {
program(&setup, &state, instruction_labels[offset].getAddress());
}
void Compile(const std::array<u32, 1024>* program_code,
const std::array<u32, 1024>* swizzle_data);
void Compile_ADD(Instruction instr);
void Compile_DP3(Instruction instr);
void Compile_DP4(Instruction instr);
void Compile_DPH(Instruction instr);
void Compile_EX2(Instruction instr);
void Compile_LG2(Instruction instr);
void Compile_MUL(Instruction instr);
void Compile_SGE(Instruction instr);
void Compile_SLT(Instruction instr);
void Compile_FLR(Instruction instr);
void Compile_MAX(Instruction instr);
void Compile_MIN(Instruction instr);
void Compile_RCP(Instruction instr);
void Compile_RSQ(Instruction instr);
void Compile_MOVA(Instruction instr);
void Compile_MOV(Instruction instr);
void Compile_NOP(Instruction instr);
void Compile_END(Instruction instr);
void Compile_CALL(Instruction instr);
void Compile_CALLC(Instruction instr);
void Compile_CALLU(Instruction instr);
void Compile_IF(Instruction instr);
void Compile_LOOP(Instruction instr);
void Compile_JMP(Instruction instr);
void Compile_CMP(Instruction instr);
void Compile_MAD(Instruction instr);
private:
void Compile_Block(unsigned end);
void Compile_NextInstr();
void Compile_SwizzleSrc(Instruction instr, unsigned src_num, SourceRegister src_reg,
Xbyak::Xmm dest);
void Compile_DestEnable(Instruction instr, Xbyak::Xmm dest);
/**
* Compiles a `MUL src1, src2` operation, properly handling the PICA semantics when multiplying
* zero by inf. Clobbers `src2` and `scratch`.
*/
void Compile_SanitizedMul(Xbyak::Xmm src1, Xbyak::Xmm src2, Xbyak::Xmm scratch);
void Compile_EvaluateCondition(Instruction instr);
void Compile_UniformCondition(Instruction instr);
/**
* Emits the code to conditionally return from a subroutine envoked by the `CALL` instruction.
*/
void Compile_Return();
BitSet32 PersistentCallerSavedRegs();
/**
* Assertion evaluated at compile-time, but only triggered if executed at runtime.
* @param msg Message to be logged if the assertion fails.
*/
void Compile_Assert(bool condition, const char* msg);
/**
* Analyzes the entire shader program for `CALL` instructions before emitting any code,
* identifying the locations where a return needs to be inserted.
*/
void FindReturnOffsets();
const std::array<u32, 1024>* program_code = nullptr;
const std::array<u32, 1024>* swizzle_data = nullptr;
/// Mapping of Pica VS instructions to pointers in the emitted code
std::array<Xbyak::Label, 1024> instruction_labels;
/// Offsets in code where a return needs to be inserted
std::vector<unsigned> return_offsets;
unsigned program_counter = 0; ///< Offset of the next instruction to decode
bool looping = false; ///< True if compiling a loop, used to check for nested loops
using CompiledShader = void(const void* setup, void* state, const u8* start_addr);
CompiledShader* program = nullptr;
};
} // Shader
} // Pica
