ST2D (scalar plus scalar)

Contiguous store two-doubleword structures from two vectors (scalar index)

Contiguous store two-doubleword structures, each from the same element number in two vector registers to the memory address generated by a 64-bit scalar base and a 64-bit scalar index register scaled by the element size (LSL option) and added to the base address. After each structure access the index value is incremented by two. The index register is not updated by the instruction.

Each predicate element applies to the same element number in each of the two vector registers, or equivalently to the two consecutive doublewords in memory which make up each structure. Inactive structures are not written to memory.

if !HaveSVE() && !HaveSME() then UNDEFINED; if Rm == '11111' then UNDEFINED; integer t = UInt(Zt); integer n = UInt(Rn); integer m = UInt(Rm); integer g = UInt(Pg); integer esize = 64; integer nreg = 2;