kc3-lang/angle/src/compiler/translator/ExpandIntegerPowExpressions.h

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• Hash : 1048e43f
  Author :
  Date : 2016-07-23T18:51:28
  

  D3D: Work around HLSL integer pow folding bug.
  
  BUG=angleproject:851
  
  Change-Id: I68a47b8343a29e42c0a69ca3f2a6cb5054d03782
  Reviewed-on: https://chromium-review.googlesource.com/362775
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/ExpandIntegerPowExpressions.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.
  //
  // This mutating tree traversal works around a bug in the HLSL compiler optimizer with "pow" that
  // manifests under the following conditions:
  //
  // - If pow() has a literal exponent value
  // - ... and this value is integer or within 10e-6 of an integer
  // - ... and it is in {-4, -3, -2, 2, 3, 4, 5, 6, 7, 8}
  //
  // The workaround is to replace the pow with a series of multiplies.
  // See http://anglebug.com/851
  
  #ifndef COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_
  #define COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_
  
  class TIntermNode;
  
  namespace sh
  {
  
  void ExpandIntegerPowExpressions(TIntermNode *root, unsigned int *tempIndex);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_
  

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