SSE_ALL-Probability/Statistics-MMX#

_m_pavgb#

__m64 _m_pavgb(__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 _m_pavgw(__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