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| -rw-r--r-- | include/pthreadpool.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/pthreadpool.h b/include/pthreadpool.h index 2443285..d15bf3f 100644 --- a/include/pthreadpool.h +++ b/include/pthreadpool.h @@ -17,6 +17,19 @@ typedef void (*pthreadpool_task_5d_tile_2d_t)(void*, size_t, size_t, size_t, siz typedef void (*pthreadpool_task_6d_tile_2d_t)(void*, size_t, size_t, size_t, size_t, size_t, size_t, size_t, size_t); +/** + * Disable support for denormalized numbers to the maximum extent possible for the duration of the computation. + * + * Handling denormalized floating-point numbers is often implemented in microcode, and incurs significant performance + * degradation. This hint instructs the thread pool to disable support for denormalized numbers before running the + * computation by manipulating architecture-specific control registers, and restore the initial value of control + * registers after the computation is complete. The thread pool temporary disables denormalized numbers on all threads + * involved in the computation (i.e. the caller threads, and potentially worker threads). + * + * Disabling denormalized numbers may have a small negative effect on results' accuracy. As various architectures differ + * in capabilities to control processing of denormalized numbers, using this flag may also hurt results' reproducibility + * across different instruction set architectures. + */ #define PTHREADPOOL_FLAG_DISABLE_DENORMALS 0x00000001 #ifdef __cplusplus |