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/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and /or associated documentation files
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* (the "Materials "), to deal in the Materials without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Materials,
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* and to permit persons to whom the Materials are furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Materials.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
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* THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#ifndef __SFCOMPILER_H
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#define __SFCOMPILER_H
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#include <string>
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#ifndef __SFDYNAMICPIXELPIPE_H
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# include "sfDynamicPixelPipe.h"
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#endif
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#ifndef __SFDYNAMICBLITTER_H
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# include "sfDynamicBlitter.h"
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#endif
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#ifndef __RIPIXELPIPE_H
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# include "riPixelPipe.h"
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#endif
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#ifndef __SFFUNCTIONCACHE_H
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# include "sfFunctionCache.h"
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#endif
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#include "llvm/LLVMContext.h"
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// \note PPCompiler class also caches a certain amount of compiled functions.
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// It may make sense to move the cache into a separate container.
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// LLVM forward declarations
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namespace llvm {
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class Type;
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class Constant;
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class Function;
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class Module;
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class ExecutionEngine;
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}
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namespace OpenVGRI {
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// Pixel-pipeline function with constant state removed:
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typedef void (*PixelPipeFunction)(const PixelPipe::PPUniforms&, PixelPipe::PPVariants&, const Span*, int);
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// Image-blitting function with constant state removed:
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typedef void (*BlitterFunction)(const DynamicBlitter::BlitUniforms&);
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class PPCompiler
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{
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public:
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typedef int PixelPipeHandle;
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typedef int BlitterHandle;
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private:
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// Function that generates LLVM-constant from a pixel-pipeline:
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typedef ::llvm::Constant* (*ConstantGenFunc)(const void* structure, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
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struct PPCompilerContext {
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PPCompilerContext();
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~PPCompilerContext();
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// Stores persistent objects related to each component (pixelpipe or blitter).
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// Note that the execution engine must be a per-process singleton for LLVM before
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// version 2.7!
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::llvm::Module* module;
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::llvm::Function* llvmFunction;
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};
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struct PartialEvalFunc
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{
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::llvm::Function* llvmFunc;
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::llvm::GlobalVariable* llvmConst;
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};
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public:
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PPCompiler();
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~PPCompiler();
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static PartialEvalFunc compilePixelPipeline(::llvm::LLVMContext& llvmContext, PPCompilerContext& compilerContext, ConstantGenFunc constGenFunc, const void* state, const std::string& newFuntionName);
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// These functions get an reserve a handle to a pixelpipe/blitter. MUST use release
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// after done with the function.
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PixelPipeHandle compilePixelPipeline(const PixelPipe::SignatureState& state);
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BlitterHandle compileBlitter(const DynamicBlitter::BlitSignatureState& state);
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PixelPipeFunction getPixelPipePtr(PixelPipeHandle handle);
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BlitterFunction getBlitterPtr(BlitterHandle handle);
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void releasePixelPipeline(PixelPipeHandle handle);
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void releaseBlitter(BlitterHandle handle);
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bool init();
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// It seems that under VS, the static init order is not correct so the compiler has to be created
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// during run-time.
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static PPCompiler& getCompiler() { if(!s_compiler) { s_compiler = new PPCompiler(); } return *s_compiler; }
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private:
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bool initPPContext(PPCompilerContext& context, const unsigned char* data, size_t dataSize, const char* functionName);
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//void* compileRenderingFunction(const void* signatureState, RenderingFunctionType type);
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static ::llvm::Constant* createConstantStruct(const void* structure, size_t structureSize, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
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static ::llvm::Constant* createPPConstant(const void* signatureState, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
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static ::llvm::Constant* createBlitterConstant(const void* signatureState, ::llvm::LLVMContext& llvmContext, const ::llvm::Type* structType);
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static ::llvm::Function* findFunctionWithString(::llvm::Module* module, const char* namepart);
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static void llvmCheckPtrError(const void* ptr, std::string& err);
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static std::string stringOfArray(const RIuint32* arr, int nElems);
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private:
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//::llvm::LLVMContext& getLLVMContext() { return ::llvm::getGlobalContext(); }
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::llvm::LLVMContext& getLLVMContext() { return m_llvmContext; }
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// The order is important atm. because llvm context must be destroyed last:
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//::llvm::LLVMContext& m_llvmContext;
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PPCompilerContext m_blitterContext;
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PPCompilerContext m_ppContext;
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::llvm::ExecutionEngine* m_executionEngine;
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// \note Loading a system with LLVM already consumes a lot of memory, so
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// the amount of cached functions can be grown substantially depending on
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// requirements.
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enum { NUM_CACHED_PIXELPIPES = 64 };
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enum { NUM_CACHED_BLITTERS = NUM_CACHED_PIXELPIPES };
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FunctionCache<PixelPipeHash> m_ppCache;
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FunctionCache<BlitterHash> m_blitterCache;
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typedef FunctionCache<PixelPipeHash>::EntryHandle PixelPipeEntryHandle;
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typedef FunctionCache<BlitterHash>::EntryHandle BlitterEntryHandle;
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//std::vector<CacheEntry<BlitterHash> > blitterCache;
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::llvm::LLVMContext m_llvmContext;
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static PPCompiler* s_compiler;
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};
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}
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#endif
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