Developer Guide and Reference

Contents

_mm256_avg_epu8/16

Computes the average of unsigned 8/16-bit integer data elements of two vectors. The corresponding Intel® AVX2 instruction is
VPAVGB
or
VPAVGW
.

Syntax

extern __m256i _mm256_avg_epu8(__m256i s1, __m256i s2);
extern __m256i _mm256_avg_epu16(__m256i s1, __m256i s2);
Arguments
s1
integer source vector used for the operation
s2
integer source vector used for the operation
Description
Performs a SIMD average of the packed unsigned integers from source vector
s2
and source vector
s1
and stores the results in the destination vector. For each corresponding pair of data elements in the first and second vectors, the elements are added together, a 1 is added to the temporary sum, and that result is shifted right by one bit position.
Returns
Result of the operation.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804