_m_psllw
Classification
MMX, Shift, CPUID Test: MMX
Header File
Instruction
PSLLW mm, mm
Synopsis
_m_psllw(__m64 a, __m64 count);
Description
Shift packed 16-bit integers in "a" left by "count" while shifting in zeros, and store the results in "dst".
Operation
FOR j := 0 to 3
i := j*16
IF count[63:0] > 15
dst[i+15:i] := 0
ELSE
dst[i+15:i] := ZeroExtend16(a[i+15:i] << count[63:0])
FI
ENDFOR