Add Pair of elements (scalar). This instruction adds two vector elements in the source SIMD&FP register and writes the scalar result into 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.
| 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 | 0 | 1 | 1 | 1 | 1 | 0 | size | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | Rn | Rd | |||||||||
integer d = UInt(Rd); integer n = UInt(Rn); if size != '11' then UNDEFINED; integer esize = 8 << UInt(size); integer datasize = esize * 2; integer elements = 2; ReduceOp op = ReduceOp_ADD;
| <V> |
Is the destination width specifier,
encoded in
|
| <d> |
Is the number of the SIMD&FP destination register, encoded in the "Rd" field. |
| <Vn> |
Is the name of the SIMD&FP source register, encoded in the "Rn" field. |
| <T> |
Is the source arrangement specifier,
encoded in
|
CheckFPAdvSIMDEnabled64(); bits(datasize) operand = V[n]; V[d] = Reduce(op, operand, esize);
If PSTATE.DIT is 1:
Internal version only: isa v33.11seprel, AdvSIMD v29.05, pseudocode v2021-09_rel, sve v2021-09_rc3d ; Build timestamp: 2021-10-06T11:41
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