ippSetDenormAreZeros

Enables or disables denormals-are-zero mode.

Syntax

IppStatus ippSetDenormAreZeros(int value);

Parameters

value

Switch to set or clear the corresponding bit of the MXCSR register.

Description

The function ippSetDenormAreZeros is declared in the ippcore.h file. This function enables (when the value is not equal to 0) or disables (when the value is equal to 0) the denormals-are-zero (DAZ) mode of processors that support Streaming SIMD Extensions (SSE) instructions. The DAZ mode controls the processor response to a SIMD floating-point denormal operand condition. When the DAZ flag is set, the processor converts all denormal source operands to zero with the sign of the original operand before performing any computations on source data. The DAZ mode is provided to improve processor performance for applications such as streaming media processing, where rounding a denormal operand to zero does not noticeably affect the quality of the processed data.

See more details in Casey08.

Return Values

ippStsNoErr	Indicates no error.
ippStsCpuNotSupportedErr	Indicates an error condition when the DAZ mode is not supported by the processor.