Available on x86 and target feature
sse4a only.Expand description
Inserts the [length:0] bits of y into x at index.
The bits of y:
[69:64]specify thelength,[77:72]specify the index.
If the length is zero it is interpreted as 64. If index + length > 64
or index > 0 && length == 0 the result is undefined.