kc3-lang/angle/src/tests/test_utils/ConstantFoldingTest.h

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• Author : Olli Etuaho
  Date : 2017-01-21 10:51:27
  Hash : 9250cb24
  Message : Add ESSL 3.10 integer math built-ins This adds built-ins found in ESSL 3.10 section 8.8 Integer functions. This includes constant folding support for functions that may be constant folded, and support for both GLSL and HLSL output. In HLSL several of the functions need to be emulated. The precision qualification for the return value of some of these functions is determined by special rules, that are now part of type promotion for TIntermUnary nodes and determining the type of TIntermAggregate nodes. BUG=angleproject:1730 TEST=angle_unittests TEST=dEQP-GLES31.functional.shaders.builtin_functions.integer.* Change-Id: Ib0056c17671c42b6496c2f0ef059b99f8f25c122 Reviewed-on: https://chromium-review.googlesource.com/431310 Commit-Queue: Olli Etuaho <oetuaho@nvidia.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/tests/test_utils/ConstantFoldingTest.h

• //
  // Copyright (c) 2016 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // ConstantFoldingTest.h:
  //   Utilities for constant folding tests.
  //
  
  #ifndef TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_
  #define TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_
  
  #include <vector>
  
  #include "common/mathutil.h"
  #include "compiler/translator/IntermNode.h"
  #include "tests/test_utils/ShaderCompileTreeTest.h"
  
  namespace sh
  {
  
  class TranslatorESSL;
  
  template <typename T>
  class ConstantFinder : public TIntermTraverser
  {
    public:
      ConstantFinder(const std::vector<T> &constantVector)
          : TIntermTraverser(true, false, false),
            mConstantVector(constantVector),
            mFaultTolerance(T()),
            mFound(false)
      {
      }
  
      ConstantFinder(const std::vector<T> &constantVector, const T &faultTolerance)
          : TIntermTraverser(true, false, false),
            mConstantVector(constantVector),
            mFaultTolerance(faultTolerance),
            mFound(false)
      {
      }
  
      ConstantFinder(const T &value)
          : TIntermTraverser(true, false, false), mFaultTolerance(T()), mFound(false)
      {
          mConstantVector.push_back(value);
      }
  
      void visitConstantUnion(TIntermConstantUnion *node)
      {
          if (node->getType().getObjectSize() == mConstantVector.size())
          {
              bool found = true;
              for (size_t i = 0; i < mConstantVector.size(); i++)
              {
                  if (!isEqual(node->getUnionArrayPointer()[i], mConstantVector[i]))
                  {
                      found = false;
                      break;
                  }
              }
              if (found)
              {
                  mFound = found;
              }
          }
      }
  
      bool found() const { return mFound; }
  
    private:
      bool isEqual(const TConstantUnion &node, const float &value) const
      {
          if (node.getType() != EbtFloat)
          {
              return false;
          }
          if (value == std::numeric_limits<float>::infinity())
          {
              return gl::isInf(node.getFConst()) && node.getFConst() > 0;
          }
          else if (value == -std::numeric_limits<float>::infinity())
          {
              return gl::isInf(node.getFConst()) && node.getFConst() < 0;
          }
          else if (gl::isNaN(value))
          {
              // All NaNs are treated as equal.
              return gl::isNaN(node.getFConst());
          }
          return mFaultTolerance >= fabsf(node.getFConst() - value);
      }
  
      bool isEqual(const TConstantUnion &node, const int &value) const
      {
          if (node.getType() != EbtInt)
          {
              return false;
          }
          ASSERT(mFaultTolerance < std::numeric_limits<int>::max());
          // abs() returns 0 at least on some platforms when the minimum int value is passed in (it
          // doesn't have a positive counterpart).
          return mFaultTolerance >= abs(node.getIConst() - value) &&
                 (node.getIConst() - value) != std::numeric_limits<int>::min();
      }
  
      bool isEqual(const TConstantUnion &node, const unsigned int &value) const
      {
          if (node.getType() != EbtUInt)
          {
              return false;
          }
          ASSERT(mFaultTolerance < static_cast<unsigned int>(std::numeric_limits<int>::max()));
          return static_cast<int>(mFaultTolerance) >=
                     abs(static_cast<int>(node.getUConst() - value)) &&
                 static_cast<int>(node.getUConst() - value) != std::numeric_limits<int>::min();
      }
  
      bool isEqual(const TConstantUnion &node, const bool &value) const
      {
          if (node.getType() != EbtBool)
          {
              return false;
          }
          return node.getBConst() == value;
      }
  
      std::vector<T> mConstantVector;
      T mFaultTolerance;
      bool mFound;
  };
  
  class ConstantFoldingTest : public ShaderCompileTreeTest
  {
    public:
      ConstantFoldingTest() {}
  
    protected:
      ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; }
      ShShaderSpec getShaderSpec() const override { return SH_GLES3_1_SPEC; }
  
      template <typename T>
      bool constantFoundInAST(T constant)
      {
          ConstantFinder<T> finder(constant);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  
      template <typename T>
      bool constantVectorFoundInAST(const std::vector<T> &constantVector)
      {
          ConstantFinder<T> finder(constantVector);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  
      template <typename T>
      bool constantColumnMajorMatrixFoundInAST(const std::vector<T> &constantMatrix)
      {
          return constantVectorFoundInAST(constantMatrix);
      }
  
      template <typename T>
      bool constantVectorNearFoundInAST(const std::vector<T> &constantVector, const T &faultTolerance)
      {
          ConstantFinder<T> finder(constantVector, faultTolerance);
          mASTRoot->traverse(&finder);
          return finder.found();
      }
  };
  
  class ConstantFoldingExpressionTest : public ConstantFoldingTest
  {
    public:
      ConstantFoldingExpressionTest() {}
  
      void evaluateFloat(const std::string &floatExpression);
      void evaluateInt(const std::string &intExpression);
      void evaluateUint(const std::string &uintExpression);
  };
  
  }  // namespace sh
  
  #endif  // TESTS_TEST_UTILS_CONSTANTFOLDINGTEST_H_