ADDP (scalar)

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.

313029282726252423222120191817161514131211109876543210
01011110size110001101110RnRd

Advanced SIMD

ADDP <V><d>, <Vn>.<T>

integer d = UInt(Rd); integer n = UInt(Rn); if size != '11' then UNDEFINED; integer esize = 8 << UInt(size); integer datasize = esize * 2;

Assembler Symbols

<V> Is the destination width specifier, encoded in size:
size <V>
0x RESERVED
10 RESERVED
11 D
<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 size:
size <T>
0x RESERVED
10 RESERVED
11 2D

Operation

CheckFPAdvSIMDEnabled64(); bits(datasize) operand = V[n]; V[d] = Reduce(ReduceOp_ADD, operand, esize);

Operational information

If PSTATE.DIT is 1:


Internal version only: isa v30.41, AdvSIMD v27.08, pseudocode r8p5_00bet2_rc5, sve v8.5-00bet10_rc5 ; Build timestamp: 2019-03-28T07:14

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