flush denormals to zero, test=develop #29924
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Superjomn
reviewed
Dec 26, 2020
| #ifdef DENORM_USE_INTRINSICS | ||
| #ifdef PADDLE_WITH_SSE3 | ||
| // Restore flags | ||
| _MM_SET_FLUSH_ZERO_MODE(flush_zero_mode ? _MM_FLUSH_ZERO_ON |
| namespace paddle { | ||
| namespace platform { | ||
|
|
||
| class ScopedRestoreFlushDenormalState { |
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juncaipeng
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Dec 28, 2020
好的。 |
Shixiaowei02
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* flush denormals to zero, test=develop * add comments, test=develop
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PR types
Bug fixes
PR changes
Others
Describe
将 SSE3 计算中非正规值置零，以提高性能。
参考链接：
https://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x