351 lines
13 KiB
C++
351 lines
13 KiB
C++
// Copyright 2021 yuzu Emulator Project
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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 "common/settings.h"
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#include "shader_recompiler/environment.h"
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#include "shader_recompiler/frontend/ir/ir_emitter.h"
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#include "shader_recompiler/frontend/ir/modifiers.h"
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#include "shader_recompiler/frontend/ir/program.h"
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#include "shader_recompiler/frontend/ir/value.h"
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#include "shader_recompiler/ir_opt/passes.h"
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#include "shader_recompiler/shader_info.h"
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namespace Shader::Optimization {
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namespace {
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[[nodiscard]] bool IsTextureTypeRescalable(TextureType type) {
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switch (type) {
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case TextureType::Color2D:
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case TextureType::ColorArray2D:
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return true;
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case TextureType::Color1D:
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case TextureType::ColorArray1D:
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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break;
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}
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return false;
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}
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void VisitMark(IR::Block& block, IR::Inst& inst) {
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switch (inst.GetOpcode()) {
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case IR::Opcode::ShuffleIndex:
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case IR::Opcode::ShuffleUp:
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case IR::Opcode::ShuffleDown:
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case IR::Opcode::ShuffleButterfly: {
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const IR::Value shfl_arg{inst.Arg(0)};
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if (shfl_arg.IsImmediate()) {
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break;
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}
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const IR::Inst* const arg_inst{shfl_arg.InstRecursive()};
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if (arg_inst->GetOpcode() != IR::Opcode::BitCastU32F32) {
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break;
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}
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const IR::Value bitcast_arg{arg_inst->Arg(0)};
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if (bitcast_arg.IsImmediate()) {
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break;
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}
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IR::Inst* const bitcast_inst{bitcast_arg.InstRecursive()};
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bool must_patch_outside = false;
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if (bitcast_inst->GetOpcode() == IR::Opcode::GetAttribute) {
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const IR::Attribute attr{bitcast_inst->Arg(0).Attribute()};
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switch (attr) {
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case IR::Attribute::PositionX:
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case IR::Attribute::PositionY:
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bitcast_inst->SetFlags<u32>(0xDEADBEEF);
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must_patch_outside = true;
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break;
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default:
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break;
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}
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}
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if (must_patch_outside) {
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const auto it{IR::Block::InstructionList::s_iterator_to(inst)};
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const IR::F32 new_inst{&*block.PrependNewInst(it, inst)};
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const IR::F32 up_factor{ir.FPRecip(ir.ResolutionDownFactor())};
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const IR::Value converted{ir.FPMul(new_inst, up_factor)};
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inst.ReplaceUsesWith(converted);
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}
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break;
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}
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default:
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break;
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}
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}
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void PatchFragCoord(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const IR::F32 down_factor{ir.ResolutionDownFactor()};
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const IR::F32 frag_coord{ir.GetAttribute(inst.Arg(0).Attribute())};
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const IR::F32 downscaled_frag_coord{ir.FPMul(frag_coord, down_factor)};
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inst.ReplaceUsesWith(downscaled_frag_coord);
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}
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void PatchPointSize(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const IR::F32 point_value{inst.Arg(1)};
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const IR::F32 up_factor{ir.FPRecip(ir.ResolutionDownFactor())};
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const IR::F32 upscaled_point_value{ir.FPMul(point_value, up_factor)};
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inst.SetArg(1, upscaled_point_value);
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}
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[[nodiscard]] IR::U32 Scale(IR::IREmitter& ir, const IR::U1& is_scaled, const IR::U32& value) {
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IR::U32 scaled_value{value};
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if (const u32 up_scale = Settings::values.resolution_info.up_scale; up_scale != 1) {
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scaled_value = ir.IMul(scaled_value, ir.Imm32(up_scale));
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}
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if (const u32 down_shift = Settings::values.resolution_info.down_shift; down_shift != 0) {
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scaled_value = ir.ShiftRightArithmetic(scaled_value, ir.Imm32(down_shift));
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}
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return IR::U32{ir.Select(is_scaled, scaled_value, value)};
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}
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[[nodiscard]] IR::U32 SubScale(IR::IREmitter& ir, const IR::U1& is_scaled, const IR::U32& value,
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const IR::Attribute attrib) {
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const IR::F32 up_factor{ir.Imm32(Settings::values.resolution_info.up_factor)};
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const IR::F32 base{ir.FPMul(ir.ConvertUToF(32, 32, value), up_factor)};
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const IR::F32 frag_coord{ir.GetAttribute(attrib)};
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const IR::F32 down_factor{ir.Imm32(Settings::values.resolution_info.down_factor)};
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const IR::F32 floor{ir.FPMul(up_factor, ir.FPFloor(ir.FPMul(frag_coord, down_factor)))};
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const IR::F16F32F64 deviation{ir.FPAdd(base, ir.FPAdd(frag_coord, ir.FPNeg(floor)))};
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return IR::U32{ir.Select(is_scaled, ir.ConvertFToU(32, deviation), value)};
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}
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[[nodiscard]] IR::U32 DownScale(IR::IREmitter& ir, const IR::U1& is_scaled, const IR::U32& value) {
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IR::U32 scaled_value{value};
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if (const u32 down_shift = Settings::values.resolution_info.down_shift; down_shift != 0) {
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scaled_value = ir.ShiftLeftLogical(scaled_value, ir.Imm32(down_shift));
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}
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if (const u32 up_scale = Settings::values.resolution_info.up_scale; up_scale != 1) {
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scaled_value = ir.IDiv(scaled_value, ir.Imm32(up_scale));
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}
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return IR::U32{ir.Select(is_scaled, scaled_value, value)};
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}
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void PatchImageQueryDimensions(IR::Block& block, IR::Inst& inst) {
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const auto it{IR::Block::InstructionList::s_iterator_to(inst)};
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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const IR::U1 is_scaled{ir.IsTextureScaled(ir.Imm32(info.descriptor_index))};
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switch (info.type) {
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case TextureType::Color2D:
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case TextureType::ColorArray2D: {
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const IR::Value new_inst{&*block.PrependNewInst(it, inst)};
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const IR::U32 width{DownScale(ir, is_scaled, IR::U32{ir.CompositeExtract(new_inst, 0)})};
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const IR::U32 height{DownScale(ir, is_scaled, IR::U32{ir.CompositeExtract(new_inst, 1)})};
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const IR::Value replacement{ir.CompositeConstruct(
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width, height, ir.CompositeExtract(new_inst, 2), ir.CompositeExtract(new_inst, 3))};
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inst.ReplaceUsesWith(replacement);
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break;
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}
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case TextureType::Color1D:
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case TextureType::ColorArray1D:
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void ScaleIntegerComposite(IR::IREmitter& ir, IR::Inst& inst, const IR::U1& is_scaled,
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size_t index) {
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const IR::Value composite{inst.Arg(index)};
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if (composite.IsEmpty()) {
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return;
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}
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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const IR::U32 x{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(composite, 0)})};
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const IR::U32 y{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(composite, 1)})};
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switch (info.type) {
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case TextureType::Color2D:
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inst.SetArg(index, ir.CompositeConstruct(x, y));
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break;
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case TextureType::ColorArray2D: {
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const IR::U32 z{ir.CompositeExtract(composite, 2)};
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inst.SetArg(index, ir.CompositeConstruct(x, y, z));
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break;
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}
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case TextureType::Color1D:
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case TextureType::ColorArray1D:
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void ScaleIntegerOffsetComposite(IR::IREmitter& ir, IR::Inst& inst, const IR::U1& is_scaled,
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size_t index) {
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const IR::Value composite{inst.Arg(index)};
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if (composite.IsEmpty()) {
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return;
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}
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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const IR::U32 x{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(composite, 0)})};
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const IR::U32 y{Scale(ir, is_scaled, IR::U32{ir.CompositeExtract(composite, 1)})};
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switch (info.type) {
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case TextureType::ColorArray2D:
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case TextureType::Color2D:
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inst.SetArg(index, ir.CompositeConstruct(x, y));
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break;
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case TextureType::Color1D:
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case TextureType::ColorArray1D:
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void SubScaleCoord(IR::IREmitter& ir, IR::Inst& inst, const IR::U1& is_scaled) {
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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const IR::Value coord{inst.Arg(1)};
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const IR::U32 coord_x{ir.CompositeExtract(coord, 0)};
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const IR::U32 coord_y{ir.CompositeExtract(coord, 1)};
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const IR::U32 scaled_x{SubScale(ir, is_scaled, coord_x, IR::Attribute::PositionX)};
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const IR::U32 scaled_y{SubScale(ir, is_scaled, coord_y, IR::Attribute::PositionY)};
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switch (info.type) {
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case TextureType::Color2D:
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inst.SetArg(1, ir.CompositeConstruct(scaled_x, scaled_y));
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break;
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case TextureType::ColorArray2D: {
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const IR::U32 z{ir.CompositeExtract(coord, 2)};
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inst.SetArg(1, ir.CompositeConstruct(scaled_x, scaled_y, z));
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break;
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}
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case TextureType::Color1D:
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case TextureType::ColorArray1D:
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case TextureType::Color3D:
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case TextureType::ColorCube:
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case TextureType::ColorArrayCube:
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case TextureType::Buffer:
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// Nothing to patch here
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break;
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}
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}
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void SubScaleImageFetch(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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if (!IsTextureTypeRescalable(info.type)) {
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return;
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}
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const IR::U1 is_scaled{ir.IsTextureScaled(ir.Imm32(info.descriptor_index))};
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SubScaleCoord(ir, inst, is_scaled);
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// Scale ImageFetch offset
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ScaleIntegerOffsetComposite(ir, inst, is_scaled, 2);
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}
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void SubScaleImageRead(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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if (!IsTextureTypeRescalable(info.type)) {
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return;
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}
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const IR::U1 is_scaled{ir.IsImageScaled(ir.Imm32(info.descriptor_index))};
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SubScaleCoord(ir, inst, is_scaled);
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}
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void PatchImageFetch(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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if (!IsTextureTypeRescalable(info.type)) {
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return;
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}
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const IR::U1 is_scaled{ir.IsTextureScaled(ir.Imm32(info.descriptor_index))};
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ScaleIntegerComposite(ir, inst, is_scaled, 1);
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// Scale ImageFetch offset
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ScaleIntegerOffsetComposite(ir, inst, is_scaled, 2);
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}
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void PatchImageRead(IR::Block& block, IR::Inst& inst) {
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IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
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const auto info{inst.Flags<IR::TextureInstInfo>()};
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if (!IsTextureTypeRescalable(info.type)) {
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return;
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}
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const IR::U1 is_scaled{ir.IsImageScaled(ir.Imm32(info.descriptor_index))};
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ScaleIntegerComposite(ir, inst, is_scaled, 1);
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}
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void Visit(const IR::Program& program, IR::Block& block, IR::Inst& inst) {
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const bool is_fragment_shader{program.stage == Stage::Fragment};
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switch (inst.GetOpcode()) {
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case IR::Opcode::GetAttribute: {
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const IR::Attribute attr{inst.Arg(0).Attribute()};
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switch (attr) {
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case IR::Attribute::PositionX:
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case IR::Attribute::PositionY:
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if (is_fragment_shader && inst.Flags<u32>() != 0xDEADBEEF) {
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PatchFragCoord(block, inst);
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}
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break;
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default:
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break;
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}
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break;
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}
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case IR::Opcode::SetAttribute: {
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const IR::Attribute attr{inst.Arg(0).Attribute()};
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switch (attr) {
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case IR::Attribute::PointSize:
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if (inst.Flags<u32>() != 0xDEADBEEF) {
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PatchPointSize(block, inst);
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}
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break;
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default:
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break;
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}
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break;
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}
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case IR::Opcode::ImageQueryDimensions:
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PatchImageQueryDimensions(block, inst);
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break;
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case IR::Opcode::ImageFetch:
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if (is_fragment_shader) {
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SubScaleImageFetch(block, inst);
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} else {
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PatchImageFetch(block, inst);
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}
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break;
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case IR::Opcode::ImageRead:
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if (is_fragment_shader) {
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SubScaleImageRead(block, inst);
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} else {
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PatchImageRead(block, inst);
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}
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break;
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default:
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break;
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}
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}
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} // Anonymous namespace
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void RescalingPass(IR::Program& program) {
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const bool is_fragment_shader{program.stage == Stage::Fragment};
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if (is_fragment_shader) {
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for (IR::Block* const block : program.post_order_blocks) {
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for (IR::Inst& inst : block->Instructions()) {
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VisitMark(*block, inst);
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}
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}
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}
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for (IR::Block* const block : program.post_order_blocks) {
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for (IR::Inst& inst : block->Instructions()) {
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Visit(program, *block, inst);
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}
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}
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}
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} // namespace Shader::Optimization
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