SSE_ALL-Probability/Statistics-XMM#

_mm_avg_pu8#

__m64 _mm_avg_pu8(__m64 a, __m64 b);

Intel Description

Average packed unsigned 8-bit integers in “a” and “b”, and store the results in “dst”.

Intel Implementation Psudeo-Code

FOR j := 0 to 7
        i := j*8
        dst[i+7:i] := (a[i+7:i] + b[i+7:i] + 1) >> 1
ENDFOR

__m64 _mm_avg_pu16(__m64 a, __m64 b);

Intel Description

Average packed unsigned 16-bit integers in “a” and “b”, and store the results in “dst”.

Intel Implementation Psudeo-Code

FOR j := 0 to 3
        i := j*16
        dst[i+15:i] := (a[i+15:i] + b[i+15:i] + 1) >> 1
ENDFOR

__m128i _mm_avg_epu8(__m128i a, __m128i b);

Intel Description

Average packed unsigned 8-bit integers in “a” and “b”, and store the results in “dst”.

Intel Implementation Psudeo-Code

FOR j := 0 to 15
        i := j*8
        dst[i+7:i] := (a[i+7:i] + b[i+7:i] + 1) >> 1
ENDFOR

__m128i _mm_avg_epu16(__m128i a, __m128i b);

Intel Description

Average packed unsigned 16-bit integers in “a” and “b”, and store the results in “dst”.

Intel Implementation Psudeo-Code

FOR j := 0 to 7
        i := j*16
        dst[i+15:i] := (a[i+15:i] + b[i+15:i] + 1) >> 1
ENDFOR