| Jamie Madill | 1048e43 | 2016-07-23 18:51:28 -0400 | [diff] [blame] | 1 | // |
| 2 | // Copyright (c) 2016 The ANGLE Project Authors. All rights reserved. |
| 3 | // Use of this source code is governed by a BSD-style license that can be |
| 4 | // found in the LICENSE file. |
| 5 | // |
| 6 | // This mutating tree traversal works around a bug in the HLSL compiler optimizer with "pow" that |
| 7 | // manifests under the following conditions: |
| 8 | // |
| 9 | // - If pow() has a literal exponent value |
| 10 | // - ... and this value is integer or within 10e-6 of an integer |
| 11 | // - ... and it is in {-4, -3, -2, 2, 3, 4, 5, 6, 7, 8} |
| 12 | // |
| 13 | // The workaround is to replace the pow with a series of multiplies. |
| 14 | // See http://anglebug.com/851 |
| 15 | |
| 16 | #ifndef COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_ |
| 17 | #define COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_ |
| 18 | |
| 19 | class TIntermNode; |
| 20 | |
| 21 | namespace sh |
| 22 | { |
| 23 | |
| 24 | void ExpandIntegerPowExpressions(TIntermNode *root, unsigned int *tempIndex); |
| 25 | |
| 26 | } // namespace sh |
| 27 | |
| 28 | #endif // COMPILER_TRANSLATOR_EXPANDINTEGERPOWEXPRESSIONS_H_ |