Insert vector element from another vector element
This instruction copies the vector element of the source SIMD&FP register to the specified vector element of the destination SIMD&FP register.
This instruction can insert data into individual elements within a SIMD&FP register without clearing the remaining bits to zero.
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.
This instruction is used by the alias MOV (element).
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | imm5 | 0 | imm4 | 1 | Rn | Rd | |||||||||||||||
| Q | op | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_AdvSIMD) then EndOfDecode(Decode_UNDEF); if imm5 == 'x0000' then EndOfDecode(Decode_UNDEF); constant integer size = LowestSetBitNZ(imm5<3:0>); constant integer d = UInt(Rd); constant integer n = UInt(Rn); constant integer dst_index = UInt(imm5<4:size+1>); constant integer src_index = UInt(imm4<3:size>); constant integer idxdsize = 64 << UInt(imm4<3>); // imm4<size-1:0> is IGNORED constant integer esize = 8 << size;
| <Vd> |
Is the name of the SIMD&FP destination register, encoded in the "Rd" field. |
| <Ts> |
Is an element size specifier,
encoded in
|
| <index1> |
Is the destination element index
encoded in
|
| <Vn> |
Is the name of the SIMD&FP source register, encoded in the "Rn" field. |
AArch64.CheckFPAdvSIMDEnabled(); constant bits(idxdsize) operand = V[n, idxdsize]; bits(128) result; result = V[d, 128]; Elem[result, dst_index, esize] = Elem[operand, src_index, esize]; V[d, 128] = result;
This instruction is a data-independent-time instruction as described in About PSTATE.DIT.
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