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-rw-r--r-- | gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/ExpandIntegerPowExpressions.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/ExpandIntegerPowExpressions.h b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/ExpandIntegerPowExpressions.h new file mode 100644 index 0000000000..2404fb08ac --- /dev/null +++ b/gfx/angle/checkout/src/compiler/translator/tree_ops/d3d/ExpandIntegerPowExpressions.h @@ -0,0 +1,34 @@ +// +// Copyright 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_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_ +#define COMPILER_TRANSLATOR_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_ + +#include "common/angleutils.h" + +namespace sh +{ + +class TCompiler; +class TIntermNode; +class TSymbolTable; + +[[nodiscard]] bool ExpandIntegerPowExpressions(TCompiler *compiler, + TIntermNode *root, + TSymbolTable *symbolTable); + +} // namespace sh + +#endif // COMPILER_TRANSLATOR_TREEOPS_D3D_EXPANDINTEGERPOWEXPRESSIONS_H_ |