diff options
Diffstat (limited to 'src/shader_recompiler/ir_opt/constant_propagation_pass.cpp')
| -rw-r--r-- | src/shader_recompiler/ir_opt/constant_propagation_pass.cpp | 227 |
1 files changed, 226 insertions, 1 deletions
diff --git a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp index 4d81e9336..f46e55122 100644 --- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp +++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp @@ -10,6 +10,7 @@ #include "shader_recompiler/environment.h" #include "shader_recompiler/exception.h" #include "shader_recompiler/frontend/ir/ir_emitter.h" +#include "shader_recompiler/frontend/ir/modifiers.h" #include "shader_recompiler/frontend/ir/value.h" #include "shader_recompiler/ir_opt/passes.h" @@ -410,7 +411,49 @@ void FoldSelect(IR::Inst& inst) { } } +void FoldFPAdd32(IR::Inst& inst) { + if (FoldWhenAllImmediates(inst, [](f32 a, f32 b) { return a + b; })) { + return; + } + const IR::Value lhs_value{inst.Arg(0)}; + const IR::Value rhs_value{inst.Arg(1)}; + const auto check_neutral = [](const IR::Value& one_operand) { + return one_operand.IsImmediate() && std::abs(one_operand.F32()) == 0.0f; + }; + if (check_neutral(lhs_value)) { + inst.ReplaceUsesWith(rhs_value); + } + if (check_neutral(rhs_value)) { + inst.ReplaceUsesWith(lhs_value); + } +} + +bool FoldDerivateYFromCorrection(IR::Inst& inst) { + const IR::Value lhs_value{inst.Arg(0)}; + const IR::Value rhs_value{inst.Arg(1)}; + IR::Inst* const lhs_op{lhs_value.InstRecursive()}; + IR::Inst* const rhs_op{rhs_value.InstRecursive()}; + if (lhs_op->GetOpcode() == IR::Opcode::YDirection) { + if (rhs_op->GetOpcode() != IR::Opcode::DPdyFine) { + return false; + } + inst.ReplaceUsesWith(rhs_value); + return true; + } + if (rhs_op->GetOpcode() != IR::Opcode::YDirection) { + return false; + } + if (lhs_op->GetOpcode() != IR::Opcode::DPdyFine) { + return false; + } + inst.ReplaceUsesWith(lhs_value); + return true; +} + void FoldFPMul32(IR::Inst& inst) { + if (FoldWhenAllImmediates(inst, [](f32 a, f32 b) { return a * b; })) { + return; + } const auto control{inst.Flags<IR::FpControl>()}; if (control.no_contraction) { return; @@ -421,6 +464,9 @@ void FoldFPMul32(IR::Inst& inst) { if (lhs_value.IsImmediate() || rhs_value.IsImmediate()) { return; } + if (FoldDerivateYFromCorrection(inst)) { + return; + } IR::Inst* const lhs_op{lhs_value.InstRecursive()}; IR::Inst* const rhs_op{rhs_value.InstRecursive()}; if (lhs_op->GetOpcode() != IR::Opcode::FPMul32 || @@ -622,7 +668,12 @@ void FoldFSwizzleAdd(IR::Block& block, IR::Inst& inst) { } const IR::Value value_3{GetThroughCast(inst2->Arg(0).Resolve(), IR::Opcode::BitCastU32F32)}; if (value_2 != value_3) { - return; + if (!value_2.IsImmediate() || !value_3.IsImmediate()) { + return; + } + if (Common::BitCast<u32>(value_2.F32()) != value_3.U32()) { + return; + } } const IR::Value index{inst2->Arg(1)}; const IR::Value clamp{inst2->Arg(2)}; @@ -648,6 +699,169 @@ void FoldFSwizzleAdd(IR::Block& block, IR::Inst& inst) { } } +bool FindGradient3DDerivates(std::array<IR::Value, 3>& results, IR::Value coord) { + if (coord.IsImmediate()) { + return false; + } + const auto check_through_shuffle = [](IR::Value input, IR::Value& result) { + const IR::Value value_1{GetThroughCast(input.Resolve(), IR::Opcode::BitCastF32U32)}; + IR::Inst* const inst2{value_1.InstRecursive()}; + if (inst2->GetOpcode() != IR::Opcode::ShuffleIndex) { + return false; + } + const IR::Value index{inst2->Arg(1).Resolve()}; + const IR::Value clamp{inst2->Arg(2).Resolve()}; + const IR::Value segmentation_mask{inst2->Arg(3).Resolve()}; + if (!index.IsImmediate() || !clamp.IsImmediate() || !segmentation_mask.IsImmediate()) { + return false; + } + if (index.U32() != 3 && clamp.U32() != 3) { + return false; + } + result = GetThroughCast(inst2->Arg(0).Resolve(), IR::Opcode::BitCastU32F32); + return true; + }; + IR::Inst* const inst = coord.InstRecursive(); + if (inst->GetOpcode() != IR::Opcode::FSwizzleAdd) { + return false; + } + std::array<IR::Value, 3> temporary_values; + IR::Value value_1 = inst->Arg(0).Resolve(); + IR::Value value_2 = inst->Arg(1).Resolve(); + IR::Value value_3 = inst->Arg(2).Resolve(); + std::array<u32, 4> swizzles_mask_a{}; + std::array<u32, 4> swizzles_mask_b{}; + const auto resolve_mask = [](std::array<u32, 4>& mask_results, IR::Value mask) { + u32 value = mask.U32(); + for (size_t i = 0; i < 4; i++) { + mask_results[i] = (value >> (i * 2)) & 0x3; + } + }; + resolve_mask(swizzles_mask_a, value_3); + size_t coordinate_index = 0; + const auto resolve_pending = [&](IR::Value resolve_v) { + IR::Inst* const inst_r = resolve_v.InstRecursive(); + if (inst_r->GetOpcode() != IR::Opcode::FSwizzleAdd) { + return false; + } + if (!check_through_shuffle(inst_r->Arg(0).Resolve(), temporary_values[1])) { + return false; + } + if (!check_through_shuffle(inst_r->Arg(1).Resolve(), temporary_values[2])) { + return false; + } + resolve_mask(swizzles_mask_b, inst_r->Arg(2).Resolve()); + return true; + }; + if (value_1.IsImmediate() || value_2.IsImmediate()) { + return false; + } + bool should_continue = false; + if (resolve_pending(value_1)) { + should_continue = check_through_shuffle(value_2, temporary_values[0]); + coordinate_index = 0; + } + if (resolve_pending(value_2)) { + should_continue = check_through_shuffle(value_1, temporary_values[0]); + coordinate_index = 2; + } + if (!should_continue) { + return false; + } + // figure which is which + size_t zero_mask_a = 0; + size_t zero_mask_b = 0; + for (size_t i = 0; i < 4; i++) { + if (swizzles_mask_a[i] == 2 || swizzles_mask_b[i] == 2) { + // last operand can be inversed, we cannot determine a result. + return false; + } + zero_mask_a |= static_cast<size_t>(swizzles_mask_a[i] == 3 ? 1 : 0) << i; + zero_mask_b |= static_cast<size_t>(swizzles_mask_b[i] == 3 ? 1 : 0) << i; + } + static constexpr size_t ddx_pattern = 0b1010; + static constexpr size_t ddx_pattern_inv = ~ddx_pattern & 0b00001111; + if (std::popcount(zero_mask_a) != 2) { + return false; + } + if (std::popcount(zero_mask_b) != 2) { + return false; + } + if (zero_mask_a == zero_mask_b) { + return false; + } + results[0] = temporary_values[coordinate_index]; + + if (coordinate_index == 0) { + if (zero_mask_b == ddx_pattern || zero_mask_b == ddx_pattern_inv) { + results[1] = temporary_values[1]; + results[2] = temporary_values[2]; + return true; + } + results[2] = temporary_values[1]; + results[1] = temporary_values[2]; + } else { + const auto assign_result = [&results](IR::Value temporary_value, size_t mask) { + if (mask == ddx_pattern || mask == ddx_pattern_inv) { + results[1] = temporary_value; + return; + } + results[2] = temporary_value; + }; + assign_result(temporary_values[1], zero_mask_b); + assign_result(temporary_values[0], zero_mask_a); + } + + return true; +} + +void FoldImageSampleImplicitLod(IR::Block& block, IR::Inst& inst) { + IR::TextureInstInfo info = inst.Flags<IR::TextureInstInfo>(); + auto orig_opcode = inst.GetOpcode(); + if (info.ndv_is_active == 0) { + return; + } + if (info.type != TextureType::Color3D) { + return; + } + const IR::Value handle{inst.Arg(0)}; + const IR::Value coords{inst.Arg(1)}; + const IR::Value bias_lc{inst.Arg(2)}; + const IR::Value offset{inst.Arg(3)}; + if (!offset.IsImmediate()) { + return; + } + IR::Inst* const inst2 = coords.InstRecursive(); + std::array<std::array<IR::Value, 3>, 3> results_matrix; + for (size_t i = 0; i < 3; i++) { + if (!FindGradient3DDerivates(results_matrix[i], inst2->Arg(i).Resolve())) { + return; + } + } + IR::F32 lod_clamp{}; + if (info.has_lod_clamp != 0) { + if (!bias_lc.IsImmediate()) { + lod_clamp = IR::F32{bias_lc.InstRecursive()->Arg(1).Resolve()}; + } else { + lod_clamp = IR::F32{bias_lc}; + } + } + IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)}; + IR::Value new_coords = + ir.CompositeConstruct(results_matrix[0][0], results_matrix[1][0], results_matrix[2][0]); + IR::Value derivatives_1 = ir.CompositeConstruct(results_matrix[0][1], results_matrix[0][2], + results_matrix[1][1], results_matrix[1][2]); + IR::Value derivatives_2 = ir.CompositeConstruct(results_matrix[2][1], results_matrix[2][2]); + info.num_derivates.Assign(3); + IR::Value new_gradient_instruction = + ir.ImageGradient(handle, new_coords, derivatives_1, derivatives_2, lod_clamp, info); + IR::Inst* const new_inst = new_gradient_instruction.InstRecursive(); + if (orig_opcode == IR::Opcode::ImageSampleImplicitLod) { + new_inst->ReplaceOpcode(IR::Opcode::ImageGradient); + } + inst.ReplaceUsesWith(new_gradient_instruction); +} + void FoldConstBuffer(Environment& env, IR::Block& block, IR::Inst& inst) { const IR::Value bank{inst.Arg(0)}; const IR::Value offset{inst.Arg(1)}; @@ -743,6 +957,12 @@ void ConstantPropagation(Environment& env, IR::Block& block, IR::Inst& inst) { case IR::Opcode::SelectF32: case IR::Opcode::SelectF64: return FoldSelect(inst); + case IR::Opcode::FPNeg32: + FoldWhenAllImmediates(inst, [](f32 a) { return -a; }); + return; + case IR::Opcode::FPAdd32: + FoldFPAdd32(inst); + return; case IR::Opcode::FPMul32: return FoldFPMul32(inst); case IR::Opcode::LogicalAnd: @@ -858,6 +1078,11 @@ void ConstantPropagation(Environment& env, IR::Block& block, IR::Inst& inst) { FoldDriverConstBuffer(env, block, inst, 1); } break; + case IR::Opcode::BindlessImageSampleImplicitLod: + case IR::Opcode::BoundImageSampleImplicitLod: + case IR::Opcode::ImageSampleImplicitLod: + FoldImageSampleImplicitLod(block, inst); + break; default: break; } |