| // Copyright 2018 The SwiftShader Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include <spirv/unified1/spirv.hpp> |
| #include "SpirvShader.hpp" |
| #include "System/Math.hpp" |
| #include "System/Debug.hpp" |
| #include "Device/Config.hpp" |
| |
| namespace sw |
| { |
| volatile int SpirvShader::serialCounter = 1; // Start at 1, 0 is invalid shader. |
| |
| SpirvShader::SpirvShader(InsnStore const &insns) : insns{insns}, serialID{serialCounter++}, modes{} |
| { |
| // Simplifying assumptions (to be satisfied by earlier transformations) |
| // - There is exactly one extrypoint in the module, and it's the one we want |
| // - Input / Output interface blocks, builtin or otherwise, have been split. |
| // - The only input/output OpVariables present are those used by the entrypoint |
| |
| for (auto insn : *this) { |
| switch (insn.opcode()) { |
| case spv::OpExecutionMode: |
| ProcessExecutionMode(insn); |
| break; |
| |
| default: |
| break; // This is OK, these passes are intentionally partial |
| } |
| } |
| } |
| |
| void SpirvShader::ProcessExecutionMode(InsnIterator insn) |
| { |
| auto mode = static_cast<spv::ExecutionMode>(insn.word(2)); |
| switch (mode) { |
| case spv::ExecutionModeEarlyFragmentTests: |
| modes.EarlyFragmentTests = true; |
| break; |
| case spv::ExecutionModeDepthReplacing: |
| modes.DepthReplacing = true; |
| break; |
| case spv::ExecutionModeDepthGreater: |
| modes.DepthGreater = true; |
| break; |
| case spv::ExecutionModeDepthLess: |
| modes.DepthLess = true; |
| break; |
| case spv::ExecutionModeDepthUnchanged: |
| modes.DepthUnchanged = true; |
| break; |
| case spv::ExecutionModeLocalSize: |
| modes.LocalSizeX = insn.word(3); |
| modes.LocalSizeZ = insn.word(5); |
| modes.LocalSizeY = insn.word(4); |
| break; |
| case spv::ExecutionModeOriginUpperLeft: |
| // This is always the case for a Vulkan shader. Do nothing. |
| break; |
| default: |
| UNIMPLEMENTED("No other execution modes are permitted"); |
| } |
| } |
| } |