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Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/ExpandIntegerPowExpressions.h')
-rw-r--r-- | src/3rdparty/angle/src/compiler/translator/ExpandIntegerPowExpressions.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/ExpandIntegerPowExpressions.h b/src/3rdparty/angle/src/compiler/translator/ExpandIntegerPowExpressions.h new file mode 100644 index 0000000000..0074e5d663 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/ExpandIntegerPowExpressions.h @@ -0,0 +1,29 @@ +// +// 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_ + +namespace sh +{ + +class TIntermNode; +class TSymbolTable; + +void ExpandIntegerPowExpressions(TIntermNode *root, TSymbolTable *symbolTable); + +} // namespace sh + +#endif // COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_ |