kc3-lang/angle/src/compiler/translator/tree_ops/RewriteAtomicFunctionExpressions.h

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• Hash : 35bc74d6
  Author :
  Date : 2018-08-03T14:07:59
  

  ES31: Support atomic functions on D3D11 - Part II
  
  This patch adds the support of translating atomicExchange and
  atomicCompSwap without return value on D3D11 back-ends.
  
  As the last parameter of the HLSL intrinsic functions
  InterlockedExchange and InterlockedCompareExchange is not optional,
  when there is a call of either atomicExchange or atomicCompSwap
  without return value, we add a temporary variable for it, so that
  we can directly translate all of such calls in outputHLSL.cpp.
  
  BUG=angleproject:2682
  TEST=angle_end2end_tests
  
  Change-Id: I7e9c6d3c7d1846c865909b2f5a26592846c82582
  Reviewed-on: https://chromium-review.googlesource.com/1161744
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Jiawei Shao <jiawei.shao@intel.com>
  

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• src/compiler/translator/tree_ops/RewriteAtomicFunctionExpressions.h

• //
  // Copyright (c) 2018 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.
  //
  // RewriteAtomicFunctionExpressions rewrites the expressions that contain
  // atomic function calls and cannot be directly translated into HLSL into
  // several simple ones that can be easily handled in the HLSL translator.
  //
  // We need to rewite these expressions because:
  // 1. All GLSL atomic functions have return values, which all represent the
  //    original value of the shared or ssbo variable; while all HLSL atomic
  //    functions don't, and the original value can be stored in the last
  //    parameter of the function call.
  // 2. For HLSL atomic functions, the last parameter that stores the original
  //    value is optional except for InterlockedExchange and
  //    InterlockedCompareExchange. Missing original_value in the call of
  //    InterlockedExchange or InterlockedCompareExchange results in a compile
  //    error from HLSL compiler.
  //
  // RewriteAtomicFunctionExpressions is a function that can modify the AST
  // to ensure all the expressions that contain atomic function calls can be
  // directly translated into HLSL expressions.
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_
  #define COMPILER_TRANSLATOR_TREEOPS_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_
  
  namespace sh
  {
  class TIntermNode;
  class TSymbolTable;
  
  void RewriteAtomicFunctionExpressions(TIntermNode *root, TSymbolTable *symbolTable);
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_REWRITE_ATOMIC_FUNCTION_EXPRESSIONS_H_

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