| Parameter | Description |
|---|---|
| a0 | 64-bit vector a0 |
| a1 | Lane index to a0. Must be an immediate in the range of [0..1] |
float Single
Duplicate vector element to vector or scalar. This instruction duplicates the vector element at the specified element index in the source SIMD&FP register into a scalar or each element in a vector, and writes the result to the destination SIMD&FP register.Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.
Equivalent instruction: DUP Sd,Vn.S[lane]