14.122 VSHRN (by immediate)

Vector Shift Right, Narrow, by immediate value.


VSHRN{cond}.datatype Dd, Qm, #imm



is an optional condition code.


must be one of I16, I32, or I64.

Dd, Qm

are the destination vector and the operand vector.


is the immediate value specifying the size of the shift. The ranges are shown in the following table:

Table 14-23 Available immediate ranges in VSHRN (by immediate)

datatype imm range
I16 0 to 8
I32 0 to 16
I64 0 to 32

VSHRN with an immediate value of zero is a pseudo-instruction for VMOVN.


VSHRN takes each element in a quadword vector, right shifts them by an immediate value, and places the results in a doubleword vector. The results are truncated.

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