PSRLDQ
Usage: PSRLDQ dest,count Modifies flags: None
Shift xmm1 'dest' register left by 'count' bytes while shifting in 0s.
Shift Double Quadword Right Logical
PSRLDQ xmm1,imm8 ; 66 0F 73 / 3 ib [Pent4]
Shifts the destination operand (first operand) to the right by the number of bytes specified in the count operand (second operand). The empty high-order bytes are cleared (set to all 0s).
If the value specified by the count operand is greater than 15, the 'dest' operand is set to all 0s.
The destination operand is an XMM register. The 'count' operand is an 8-bit immediate.
EXAMPLE:
psrldq xmm1 8