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https://github.com/citra-emu/citra.git
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Merge pull request #1546 from bunnei/refactor-shader-jit
Shader JIT Part 2
This commit is contained in:
bunnei
commit
d89e48679e
@ -455,6 +455,18 @@ void XEmitter::CALL(const void* fnptr)
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Write32(u32(distance));
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}
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FixupBranch XEmitter::CALL()
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{
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FixupBranch branch;
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branch.type = 1;
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branch.ptr = code + 5;
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Write8(0xE8);
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Write32(0);
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return branch;
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}
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FixupBranch XEmitter::J(bool force5bytes)
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{
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FixupBranch branch;
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@ -531,6 +543,22 @@ void XEmitter::SetJumpTarget(const FixupBranch& branch)
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}
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}
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void XEmitter::SetJumpTarget(const FixupBranch& branch, const u8* target)
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{
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if (branch.type == 0)
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{
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s64 distance = (s64)(target - branch.ptr);
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ASSERT_MSG(distance >= -0x80 && distance < 0x80, "Jump target too far away, needs force5Bytes = true");
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branch.ptr[-1] = (u8)(s8)distance;
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}
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else if (branch.type == 1)
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{
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s64 distance = (s64)(target - branch.ptr);
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ASSERT_MSG(distance >= -0x80000000LL && distance < 0x80000000LL, "Jump target too far away, needs indirect register");
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((s32*)branch.ptr)[-1] = (s32)distance;
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}
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}
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//Single byte opcodes
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//There is no PUSHAD/POPAD in 64-bit mode.
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void XEmitter::INT3() {Write8(0xCC);}
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@ -425,12 +425,14 @@ public:
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#undef CALL
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#endif
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void CALL(const void* fnptr);
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FixupBranch CALL();
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void CALLptr(OpArg arg);
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FixupBranch J_CC(CCFlags conditionCode, bool force5bytes = false);
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void J_CC(CCFlags conditionCode, const u8* addr, bool force5Bytes = false);
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void SetJumpTarget(const FixupBranch& branch);
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void SetJumpTarget(const FixupBranch& branch, const u8* target);
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void SETcc(CCFlags flag, OpArg dest);
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// Note: CMOV brings small if any benefit on current cpus.
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@ -140,7 +140,7 @@ static void WritePicaReg(u32 id, u32 value, u32 mask) {
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immediate_attribute_id = 0;
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Shader::UnitState<false> shader_unit;
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Shader::Setup(shader_unit);
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Shader::Setup();
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if (g_debug_context)
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g_debug_context->OnEvent(DebugContext::Event::VertexLoaded, static_cast<void*>(&immediate_input));
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@ -300,7 +300,7 @@ static void WritePicaReg(u32 id, u32 value, u32 mask) {
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vertex_cache_ids.fill(-1);
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Shader::UnitState<false> shader_unit;
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Shader::Setup(shader_unit);
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Shader::Setup();
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for (unsigned int index = 0; index < regs.num_vertices; ++index)
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{
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@ -28,36 +28,24 @@ namespace Pica {
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namespace Shader {
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#ifdef ARCHITECTURE_x86_64
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static std::unordered_map<u64, CompiledShader*> shader_map;
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static JitCompiler jit;
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static CompiledShader* jit_shader;
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static void ClearCache() {
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shader_map.clear();
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jit.Clear();
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LOG_INFO(HW_GPU, "Shader JIT cache cleared");
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}
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static std::unordered_map<u64, std::unique_ptr<JitShader>> shader_map;
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static const JitShader* jit_shader;
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#endif // ARCHITECTURE_x86_64
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void Setup(UnitState<false>& state) {
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void Setup() {
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#ifdef ARCHITECTURE_x86_64
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if (VideoCore::g_shader_jit_enabled) {
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u64 cache_key = (Common::ComputeHash64(&g_state.vs.program_code, sizeof(g_state.vs.program_code)) ^
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Common::ComputeHash64(&g_state.vs.swizzle_data, sizeof(g_state.vs.swizzle_data)) ^
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g_state.regs.vs.main_offset);
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Common::ComputeHash64(&g_state.vs.swizzle_data, sizeof(g_state.vs.swizzle_data)));
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auto iter = shader_map.find(cache_key);
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if (iter != shader_map.end()) {
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jit_shader = iter->second;
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jit_shader = iter->second.get();
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} else {
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// Check if remaining JIT code space is enough for at least one more (massive) shader
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if (jit.GetSpaceLeft() < jit_shader_size) {
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// If not, clear the cache of all previously compiled shaders
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ClearCache();
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}
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jit_shader = jit.Compile();
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shader_map.emplace(cache_key, jit_shader);
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auto shader = std::make_unique<JitShader>();
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shader->Compile();
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jit_shader = shader.get();
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shader_map[cache_key] = std::move(shader);
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}
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}
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#endif // ARCHITECTURE_x86_64
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@ -65,7 +53,7 @@ void Setup(UnitState<false>& state) {
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void Shutdown() {
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#ifdef ARCHITECTURE_x86_64
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ClearCache();
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shader_map.clear();
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#endif // ARCHITECTURE_x86_64
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}
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@ -109,7 +97,7 @@ OutputVertex Run(UnitState<false>& state, const InputVertex& input, int num_attr
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#ifdef ARCHITECTURE_x86_64
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if (VideoCore::g_shader_jit_enabled)
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jit_shader(&state.registers);
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jit_shader->Run(&state.registers, g_state.regs.vs.main_offset);
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else
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RunInterpreter(state);
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#else
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@ -339,9 +339,8 @@ struct UnitState {
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/**
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* Performs any shader unit setup that only needs to happen once per shader (as opposed to once per
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* vertex, which would happen within the `Run` function).
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* @param state Shader unit state, must be setup per shader and per shader unit
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*/
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void Setup(UnitState<false>& state);
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void Setup();
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/// Performs any cleanup when the emulator is shutdown
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void Shutdown();
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@ -2,6 +2,7 @@
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <smmintrin.h>
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#include "common/x64/abi.h"
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@ -19,73 +20,73 @@ namespace Shader {
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using namespace Gen;
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typedef void (JitCompiler::*JitFunction)(Instruction instr);
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typedef void (JitShader::*JitFunction)(Instruction instr);
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const JitFunction instr_table[64] = {
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&JitCompiler::Compile_ADD, // add
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&JitCompiler::Compile_DP3, // dp3
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&JitCompiler::Compile_DP4, // dp4
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&JitCompiler::Compile_DPH, // dph
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&JitShader::Compile_ADD, // add
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&JitShader::Compile_DP3, // dp3
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&JitShader::Compile_DP4, // dp4
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&JitShader::Compile_DPH, // dph
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nullptr, // unknown
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&JitCompiler::Compile_EX2, // ex2
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&JitCompiler::Compile_LG2, // lg2
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&JitShader::Compile_EX2, // ex2
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&JitShader::Compile_LG2, // lg2
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nullptr, // unknown
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&JitCompiler::Compile_MUL, // mul
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&JitCompiler::Compile_SGE, // sge
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&JitCompiler::Compile_SLT, // slt
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&JitCompiler::Compile_FLR, // flr
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&JitCompiler::Compile_MAX, // max
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&JitCompiler::Compile_MIN, // min
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&JitCompiler::Compile_RCP, // rcp
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&JitCompiler::Compile_RSQ, // rsq
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&JitShader::Compile_MUL, // mul
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&JitShader::Compile_SGE, // sge
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&JitShader::Compile_SLT, // slt
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&JitShader::Compile_FLR, // flr
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&JitShader::Compile_MAX, // max
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&JitShader::Compile_MIN, // min
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&JitShader::Compile_RCP, // rcp
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&JitShader::Compile_RSQ, // rsq
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nullptr, // unknown
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nullptr, // unknown
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&JitCompiler::Compile_MOVA, // mova
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&JitCompiler::Compile_MOV, // mov
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&JitShader::Compile_MOVA, // mova
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&JitShader::Compile_MOV, // mov
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nullptr, // unknown
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nullptr, // unknown
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nullptr, // unknown
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nullptr, // unknown
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&JitCompiler::Compile_DPH, // dphi
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&JitShader::Compile_DPH, // dphi
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nullptr, // unknown
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&JitCompiler::Compile_SGE, // sgei
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&JitCompiler::Compile_SLT, // slti
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&JitShader::Compile_SGE, // sgei
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&JitShader::Compile_SLT, // slti
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nullptr, // unknown
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nullptr, // unknown
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nullptr, // unknown
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nullptr, // unknown
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nullptr, // unknown
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&JitCompiler::Compile_NOP, // nop
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&JitCompiler::Compile_END, // end
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&JitShader::Compile_NOP, // nop
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&JitShader::Compile_END, // end
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nullptr, // break
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&JitCompiler::Compile_CALL, // call
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&JitCompiler::Compile_CALLC, // callc
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&JitCompiler::Compile_CALLU, // callu
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&JitCompiler::Compile_IF, // ifu
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&JitCompiler::Compile_IF, // ifc
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&JitCompiler::Compile_LOOP, // loop
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&JitShader::Compile_CALL, // call
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&JitShader::Compile_CALLC, // callc
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&JitShader::Compile_CALLU, // callu
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&JitShader::Compile_IF, // ifu
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&JitShader::Compile_IF, // ifc
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&JitShader::Compile_LOOP, // loop
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nullptr, // emit
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nullptr, // sete
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&JitCompiler::Compile_JMP, // jmpc
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&JitCompiler::Compile_JMP, // jmpu
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&JitCompiler::Compile_CMP, // cmp
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&JitCompiler::Compile_CMP, // cmp
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // madi
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitCompiler::Compile_MAD, // mad
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&JitShader::Compile_JMP, // jmpc
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&JitShader::Compile_JMP, // jmpu
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&JitShader::Compile_CMP, // cmp
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&JitShader::Compile_CMP, // cmp
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // madi
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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&JitShader::Compile_MAD, // mad
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};
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// The following is used to alias some commonly used registers. Generally, RAX-RDX and XMM0-XMM3 can
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@ -137,6 +138,25 @@ static const u8 NO_SRC_REG_SWIZZLE = 0x1b;
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/// Raw constant for the destination register enable mask that indicates all components are enabled
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static const u8 NO_DEST_REG_MASK = 0xf;
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/**
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* Get the vertex shader instruction for a given offset in the current shader program
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* @param offset Offset in the current shader program of the instruction
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* @return Instruction at the specified offset
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*/
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static Instruction GetVertexShaderInstruction(size_t offset) {
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return { g_state.vs.program_code[offset] };
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}
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static void LogCritical(const char* msg) {
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LOG_CRITICAL(HW_GPU, msg);
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}
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void JitShader::Compile_Assert(bool condition, const char* msg) {
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if (!condition) {
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ABI_CallFunctionP(reinterpret_cast<const void*>(LogCritical), const_cast<char*>(msg));
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}
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}
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/**
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* Loads and swizzles a source register into the specified XMM register.
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* @param instr VS instruction, used for determining how to load the source register
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@ -144,7 +164,7 @@ static const u8 NO_DEST_REG_MASK = 0xf;
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* @param src_reg SourceRegister object corresponding to the source register to load
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* @param dest Destination XMM register to store the loaded, swizzled source register
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*/
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void JitCompiler::Compile_SwizzleSrc(Instruction instr, unsigned src_num, SourceRegister src_reg, X64Reg dest) {
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void JitShader::Compile_SwizzleSrc(Instruction instr, unsigned src_num, SourceRegister src_reg, X64Reg dest) {
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X64Reg src_ptr;
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size_t src_offset;
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@ -216,7 +236,7 @@ void JitCompiler::Compile_SwizzleSrc(Instruction instr, unsigned src_num, Source
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}
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}
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void JitCompiler::Compile_DestEnable(Instruction instr,X64Reg src) {
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void JitShader::Compile_DestEnable(Instruction instr,X64Reg src) {
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DestRegister dest;
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unsigned operand_desc_id;
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if (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MAD ||
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@ -263,7 +283,7 @@ void JitCompiler::Compile_DestEnable(Instruction instr,X64Reg src) {
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}
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}
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void JitCompiler::Compile_SanitizedMul(Gen::X64Reg src1, Gen::X64Reg src2, Gen::X64Reg scratch) {
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void JitShader::Compile_SanitizedMul(Gen::X64Reg src1, Gen::X64Reg src2, Gen::X64Reg scratch) {
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MOVAPS(scratch, R(src1));
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CMPPS(scratch, R(src2), CMP_ORD);
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@ -276,7 +296,7 @@ void JitCompiler::Compile_SanitizedMul(Gen::X64Reg src1, Gen::X64Reg src2, Gen::
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ANDPS(src1, R(scratch));
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}
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void JitCompiler::Compile_EvaluateCondition(Instruction instr) {
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void JitShader::Compile_EvaluateCondition(Instruction instr) {
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// Note: NXOR is used below to check for equality
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switch (instr.flow_control.op) {
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case Instruction::FlowControlType::Or:
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@ -307,23 +327,23 @@ void JitCompiler::Compile_EvaluateCondition(Instruction instr) {
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}
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}
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void JitCompiler::Compile_UniformCondition(Instruction instr) {
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void JitShader::Compile_UniformCondition(Instruction instr) {
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int offset = offsetof(decltype(g_state.vs.uniforms), b) + (instr.flow_control.bool_uniform_id * sizeof(bool));
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CMP(sizeof(bool) * 8, MDisp(UNIFORMS, offset), Imm8(0));
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}
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BitSet32 JitCompiler::PersistentCallerSavedRegs() {
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BitSet32 JitShader::PersistentCallerSavedRegs() {
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return persistent_regs & ABI_ALL_CALLER_SAVED;
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}
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void JitCompiler::Compile_ADD(Instruction instr) {
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void JitShader::Compile_ADD(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
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ADDPS(SRC1, R(SRC2));
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_DP3(Instruction instr) {
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void JitShader::Compile_DP3(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
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@ -342,7 +362,7 @@ void JitCompiler::Compile_DP3(Instruction instr) {
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_DP4(Instruction instr) {
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void JitShader::Compile_DP4(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
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@ -359,7 +379,7 @@ void JitCompiler::Compile_DP4(Instruction instr) {
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_DPH(Instruction instr) {
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void JitShader::Compile_DPH(Instruction instr) {
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if (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::DPHI) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1i, SRC1);
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Compile_SwizzleSrc(instr, 2, instr.common.src2i, SRC2);
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@ -391,7 +411,7 @@ void JitCompiler::Compile_DPH(Instruction instr) {
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_EX2(Instruction instr) {
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void JitShader::Compile_EX2(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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MOVSS(XMM0, R(SRC1));
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@ -404,7 +424,7 @@ void JitCompiler::Compile_EX2(Instruction instr) {
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_LG2(Instruction instr) {
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void JitShader::Compile_LG2(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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MOVSS(XMM0, R(SRC1));
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@ -417,14 +437,14 @@ void JitCompiler::Compile_LG2(Instruction instr) {
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Compile_DestEnable(instr, SRC1);
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}
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void JitCompiler::Compile_MUL(Instruction instr) {
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void JitShader::Compile_MUL(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
|
||||
Compile_SanitizedMul(SRC1, SRC2, SCRATCH);
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_SGE(Instruction instr) {
|
||||
void JitShader::Compile_SGE(Instruction instr) {
|
||||
if (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::SGEI) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1i, SRC1);
|
||||
Compile_SwizzleSrc(instr, 2, instr.common.src2i, SRC2);
|
||||
@ -439,7 +459,7 @@ void JitCompiler::Compile_SGE(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC2);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_SLT(Instruction instr) {
|
||||
void JitShader::Compile_SLT(Instruction instr) {
|
||||
if (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::SLTI) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1i, SRC1);
|
||||
Compile_SwizzleSrc(instr, 2, instr.common.src2i, SRC2);
|
||||
@ -454,7 +474,7 @@ void JitCompiler::Compile_SLT(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_FLR(Instruction instr) {
|
||||
void JitShader::Compile_FLR(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
|
||||
if (Common::GetCPUCaps().sse4_1) {
|
||||
@ -467,7 +487,7 @@ void JitCompiler::Compile_FLR(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_MAX(Instruction instr) {
|
||||
void JitShader::Compile_MAX(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
|
||||
// SSE semantics match PICA200 ones: In case of NaN, SRC2 is returned.
|
||||
@ -475,7 +495,7 @@ void JitCompiler::Compile_MAX(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_MIN(Instruction instr) {
|
||||
void JitShader::Compile_MIN(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
|
||||
// SSE semantics match PICA200 ones: In case of NaN, SRC2 is returned.
|
||||
@ -483,7 +503,7 @@ void JitCompiler::Compile_MIN(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_MOVA(Instruction instr) {
|
||||
void JitShader::Compile_MOVA(Instruction instr) {
|
||||
SwizzlePattern swiz = { g_state.vs.swizzle_data[instr.common.operand_desc_id] };
|
||||
|
||||
if (!swiz.DestComponentEnabled(0) && !swiz.DestComponentEnabled(1)) {
|
||||
@ -528,12 +548,12 @@ void JitCompiler::Compile_MOVA(Instruction instr) {
|
||||
}
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_MOV(Instruction instr) {
|
||||
void JitShader::Compile_MOV(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_RCP(Instruction instr) {
|
||||
void JitShader::Compile_RCP(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
|
||||
// TODO(bunnei): RCPSS is a pretty rough approximation, this might cause problems if Pica
|
||||
@ -544,7 +564,7 @@ void JitCompiler::Compile_RCP(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_RSQ(Instruction instr) {
|
||||
void JitShader::Compile_RSQ(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
|
||||
|
||||
// TODO(bunnei): RSQRTSS is a pretty rough approximation, this might cause problems if Pica
|
||||
@ -555,36 +575,41 @@ void JitCompiler::Compile_RSQ(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_NOP(Instruction instr) {
|
||||
void JitShader::Compile_NOP(Instruction instr) {
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_END(Instruction instr) {
|
||||
void JitShader::Compile_END(Instruction instr) {
|
||||
ABI_PopRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
|
||||
RET();
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_CALL(Instruction instr) {
|
||||
unsigned offset = instr.flow_control.dest_offset;
|
||||
while (offset < (instr.flow_control.dest_offset + instr.flow_control.num_instructions)) {
|
||||
Compile_NextInstr(&offset);
|
||||
}
|
||||
void JitShader::Compile_CALL(Instruction instr) {
|
||||
// Push offset of the return
|
||||
PUSH(64, Imm32(instr.flow_control.dest_offset + instr.flow_control.num_instructions));
|
||||
|
||||
// Call the subroutine
|
||||
FixupBranch b = CALL();
|
||||
fixup_branches.push_back({ b, instr.flow_control.dest_offset });
|
||||
|
||||
// Skip over the return offset that's on the stack
|
||||
ADD(64, R(RSP), Imm32(8));
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_CALLC(Instruction instr) {
|
||||
void JitShader::Compile_CALLC(Instruction instr) {
|
||||
Compile_EvaluateCondition(instr);
|
||||
FixupBranch b = J_CC(CC_Z, true);
|
||||
Compile_CALL(instr);
|
||||
SetJumpTarget(b);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_CALLU(Instruction instr) {
|
||||
void JitShader::Compile_CALLU(Instruction instr) {
|
||||
Compile_UniformCondition(instr);
|
||||
FixupBranch b = J_CC(CC_Z, true);
|
||||
Compile_CALL(instr);
|
||||
SetJumpTarget(b);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_CMP(Instruction instr) {
|
||||
void JitShader::Compile_CMP(Instruction instr) {
|
||||
using Op = Instruction::Common::CompareOpType::Op;
|
||||
Op op_x = instr.common.compare_op.x;
|
||||
Op op_y = instr.common.compare_op.y;
|
||||
@ -627,7 +652,7 @@ void JitCompiler::Compile_CMP(Instruction instr) {
|
||||
SHR(64, R(COND1), Imm8(63));
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_MAD(Instruction instr) {
|
||||
void JitShader::Compile_MAD(Instruction instr) {
|
||||
Compile_SwizzleSrc(instr, 1, instr.mad.src1, SRC1);
|
||||
|
||||
if (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MADI) {
|
||||
@ -644,9 +669,8 @@ void JitCompiler::Compile_MAD(Instruction instr) {
|
||||
Compile_DestEnable(instr, SRC1);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_IF(Instruction instr) {
|
||||
ASSERT_MSG(instr.flow_control.dest_offset > *offset_ptr, "Backwards if-statements (%d -> %d) not supported",
|
||||
*offset_ptr, instr.flow_control.dest_offset.Value());
|
||||
void JitShader::Compile_IF(Instruction instr) {
|
||||
Compile_Assert(instr.flow_control.dest_offset >= program_counter, "Backwards if-statements not supported");
|
||||
|
||||
// Evaluate the "IF" condition
|
||||
if (instr.opcode.Value() == OpCode::Id::IFU) {
|
||||
@ -676,10 +700,9 @@ void JitCompiler::Compile_IF(Instruction instr) {
|
||||
SetJumpTarget(b2);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_LOOP(Instruction instr) {
|
||||
ASSERT_MSG(instr.flow_control.dest_offset > *offset_ptr, "Backwards loops (%d -> %d) not supported",
|
||||
*offset_ptr, instr.flow_control.dest_offset.Value());
|
||||
ASSERT_MSG(!looping, "Nested loops not supported");
|
||||
void JitShader::Compile_LOOP(Instruction instr) {
|
||||
Compile_Assert(instr.flow_control.dest_offset >= program_counter, "Backwards loops not supported");
|
||||
Compile_Assert(!looping, "Nested loops not supported");
|
||||
|
||||
looping = true;
|
||||
|
||||
@ -705,10 +728,7 @@ void JitCompiler::Compile_LOOP(Instruction instr) {
|
||||
looping = false;
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_JMP(Instruction instr) {
|
||||
ASSERT_MSG(instr.flow_control.dest_offset > *offset_ptr, "Backwards jumps (%d -> %d) not supported",
|
||||
*offset_ptr, instr.flow_control.dest_offset.Value());
|
||||
|
||||
void JitShader::Compile_JMP(Instruction instr) {
|
||||
if (instr.opcode.Value() == OpCode::Id::JMPC)
|
||||
Compile_EvaluateCondition(instr);
|
||||
else if (instr.opcode.Value() == OpCode::Id::JMPU)
|
||||
@ -718,30 +738,38 @@ void JitCompiler::Compile_JMP(Instruction instr) {
|
||||
|
||||
bool inverted_condition = (instr.opcode.Value() == OpCode::Id::JMPU) &&
|
||||
(instr.flow_control.num_instructions & 1);
|
||||
|
||||
FixupBranch b = J_CC(inverted_condition ? CC_Z : CC_NZ, true);
|
||||
fixup_branches.push_back({ b, instr.flow_control.dest_offset });
|
||||
}
|
||||
|
||||
Compile_Block(instr.flow_control.dest_offset);
|
||||
void JitShader::Compile_Block(unsigned end) {
|
||||
while (program_counter < end) {
|
||||
Compile_NextInstr();
|
||||
}
|
||||
}
|
||||
|
||||
void JitShader::Compile_Return() {
|
||||
// Peek return offset on the stack and check if we're at that offset
|
||||
MOV(64, R(RAX), MDisp(RSP, 8));
|
||||
CMP(32, R(RAX), Imm32(program_counter));
|
||||
|
||||
// If so, jump back to before CALL
|
||||
FixupBranch b = J_CC(CC_NZ, true);
|
||||
RET();
|
||||
SetJumpTarget(b);
|
||||
}
|
||||
|
||||
void JitCompiler::Compile_Block(unsigned end) {
|
||||
// Save current offset pointer
|
||||
unsigned* prev_offset_ptr = offset_ptr;
|
||||
unsigned offset = *prev_offset_ptr;
|
||||
void JitShader::Compile_NextInstr() {
|
||||
if (std::binary_search(return_offsets.begin(), return_offsets.end(), program_counter)) {
|
||||
Compile_Return();
|
||||
}
|
||||
|
||||
while (offset < end)
|
||||
Compile_NextInstr(&offset);
|
||||
ASSERT_MSG(code_ptr[program_counter] == nullptr, "Tried to compile already compiled shader location!");
|
||||
code_ptr[program_counter] = GetCodePtr();
|
||||
|
||||
// Restore current offset pointer
|
||||
offset_ptr = prev_offset_ptr;
|
||||
*offset_ptr = offset;
|
||||
}
|
||||
Instruction instr = GetVertexShaderInstruction(program_counter++);
|
||||
|
||||
void JitCompiler::Compile_NextInstr(unsigned* offset) {
|
||||
offset_ptr = offset;
|
||||
|
||||
Instruction instr = *(Instruction*)&g_state.vs.program_code[(*offset_ptr)++];
|
||||
OpCode::Id opcode = instr.opcode.Value();
|
||||
auto instr_func = instr_table[static_cast<unsigned>(opcode)];
|
||||
|
||||
@ -755,9 +783,35 @@ void JitCompiler::Compile_NextInstr(unsigned* offset) {
|
||||
}
|
||||
}
|
||||
|
||||
CompiledShader* JitCompiler::Compile() {
|
||||
const u8* start = GetCodePtr();
|
||||
unsigned offset = g_state.regs.vs.main_offset;
|
||||
void JitShader::FindReturnOffsets() {
|
||||
return_offsets.clear();
|
||||
|
||||
for (size_t offset = 0; offset < g_state.vs.program_code.size(); ++offset) {
|
||||
Instruction instr = GetVertexShaderInstruction(offset);
|
||||
|
||||
switch (instr.opcode.Value()) {
|
||||
case OpCode::Id::CALL:
|
||||
case OpCode::Id::CALLC:
|
||||
case OpCode::Id::CALLU:
|
||||
return_offsets.push_back(instr.flow_control.dest_offset + instr.flow_control.num_instructions);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Sort for efficient binary search later
|
||||
std::sort(return_offsets.begin(), return_offsets.end());
|
||||
}
|
||||
|
||||
void JitShader::Compile() {
|
||||
// Reset flow control state
|
||||
program = (CompiledShader*)GetCodePtr();
|
||||
program_counter = 0;
|
||||
looping = false;
|
||||
code_ptr.fill(nullptr);
|
||||
fixup_branches.clear();
|
||||
|
||||
// Find all `CALL` instructions and identify return locations
|
||||
FindReturnOffsets();
|
||||
|
||||
// The stack pointer is 8 modulo 16 at the entry of a procedure
|
||||
ABI_PushRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
|
||||
@ -780,21 +834,31 @@ CompiledShader* JitCompiler::Compile() {
|
||||
MOV(PTRBITS, R(RAX), ImmPtr(&neg));
|
||||
MOVAPS(NEGBIT, MatR(RAX));
|
||||
|
||||
looping = false;
|
||||
// Jump to start of the shader program
|
||||
JMPptr(R(ABI_PARAM2));
|
||||
|
||||
while (offset < g_state.vs.program_code.size()) {
|
||||
Compile_NextInstr(&offset);
|
||||
// Compile entire program
|
||||
Compile_Block(static_cast<unsigned>(g_state.vs.program_code.size()));
|
||||
|
||||
// Set the target for any incomplete branches now that the entire shader program has been emitted
|
||||
for (const auto& branch : fixup_branches) {
|
||||
SetJumpTarget(branch.first, code_ptr[branch.second]);
|
||||
}
|
||||
|
||||
return (CompiledShader*)start;
|
||||
// Free memory that's no longer needed
|
||||
return_offsets.clear();
|
||||
return_offsets.shrink_to_fit();
|
||||
fixup_branches.clear();
|
||||
fixup_branches.shrink_to_fit();
|
||||
|
||||
uintptr_t size = reinterpret_cast<uintptr_t>(GetCodePtr()) - reinterpret_cast<uintptr_t>(program);
|
||||
ASSERT_MSG(size <= MAX_SHADER_SIZE, "Compiled a shader that exceeds the allocated size!");
|
||||
|
||||
LOG_DEBUG(HW_GPU, "Compiled shader size=%d", size);
|
||||
}
|
||||
|
||||
JitCompiler::JitCompiler() {
|
||||
AllocCodeSpace(jit_cache_size);
|
||||
}
|
||||
|
||||
void JitCompiler::Clear() {
|
||||
ClearCodeSpace();
|
||||
JitShader::JitShader() {
|
||||
AllocCodeSpace(MAX_SHADER_SIZE);
|
||||
}
|
||||
|
||||
} // namespace Shader
|
||||
|
||||
@ -4,6 +4,9 @@
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <utility>
|
||||
#include <vector>
|
||||
|
||||
#include <nihstro/shader_bytecode.h>
|
||||
|
||||
#include "common/x64/emitter.h"
|
||||
@ -19,24 +22,22 @@ namespace Pica {
|
||||
|
||||
namespace Shader {
|
||||
|
||||
/// Memory needed to be available to compile the next shader (otherwise, clear the cache)
|
||||
constexpr size_t jit_shader_size = 1024 * 512;
|
||||
/// Memory allocated for the JIT code space cache
|
||||
constexpr size_t jit_cache_size = 1024 * 1024 * 8;
|
||||
|
||||
using CompiledShader = void(void* registers);
|
||||
/// 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 JitCompiler : public Gen::XCodeBlock {
|
||||
class JitShader : public Gen::XCodeBlock {
|
||||
public:
|
||||
JitCompiler();
|
||||
JitShader();
|
||||
|
||||
CompiledShader* Compile();
|
||||
void Run(void* registers, unsigned offset) const {
|
||||
program(registers, code_ptr[offset]);
|
||||
}
|
||||
|
||||
void Clear();
|
||||
void Compile();
|
||||
|
||||
void Compile_ADD(Instruction instr);
|
||||
void Compile_DP3(Instruction instr);
|
||||
@ -66,8 +67,9 @@ public:
|
||||
void Compile_MAD(Instruction instr);
|
||||
|
||||
private:
|
||||
|
||||
void Compile_Block(unsigned end);
|
||||
void Compile_NextInstr(unsigned* offset);
|
||||
void Compile_NextInstr();
|
||||
|
||||
void Compile_SwizzleSrc(Instruction instr, unsigned src_num, SourceRegister src_reg, Gen::X64Reg dest);
|
||||
void Compile_DestEnable(Instruction instr, Gen::X64Reg dest);
|
||||
@ -81,13 +83,39 @@ private:
|
||||
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();
|
||||
|
||||
/// Pointer to the variable that stores the current Pica code offset. Used to handle nested code blocks.
|
||||
unsigned* offset_ptr = nullptr;
|
||||
/**
|
||||
* 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);
|
||||
|
||||
/// Set to true if currently in a loop, used to check for the existence of nested loops
|
||||
bool looping = false;
|
||||
/**
|
||||
* Analyzes the entire shader program for `CALL` instructions before emitting any code,
|
||||
* identifying the locations where a return needs to be inserted.
|
||||
*/
|
||||
void FindReturnOffsets();
|
||||
|
||||
/// Mapping of Pica VS instructions to pointers in the emitted code
|
||||
std::array<const u8*, 1024> code_ptr;
|
||||
|
||||
/// 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
|
||||
|
||||
/// Branches that need to be fixed up once the entire shader program is compiled
|
||||
std::vector<std::pair<Gen::FixupBranch, unsigned>> fixup_branches;
|
||||
|
||||
using CompiledShader = void(void* registers, const u8* start_addr);
|
||||
CompiledShader* program = nullptr;
|
||||
};
|
||||
|
||||
} // Shader
|
||||
|
||||
Loading…
Reference in New Issue
Block a user