STTNP

Store unprivileged pair of registers, with non-temporal hint

This instruction calculates an address from a base register value and an immediate offset, and stores two 64-bit doublewords to the calculated address, from two registers. For information about addressing modes, see Load/Store addressing modes. For information about non-temporal pair instructions, see Load/Store non-temporal pair.

Explicit Memory effects produced by the instruction behave as if the instruction was executed at EL0 if the Effective value of PSTATE.UAO is 0 and either:

• The instruction is executed at EL1.
• The instruction is executed at EL2 when the Effective value of HCR_EL2.{E2H, TGE} is {1, 1}.

Otherwise, the Explicit Memory effects operate with the restrictions determined by the Exception level at which the instruction is executed.

Signed offset
(FEAT_LSUI)

Decode for this encoding

if !IsFeatureImplemented(FEAT_LSUI) then EndOfDecode(Decode_UNDEF); constant integer t = UInt(Rt); constant integer t2 = UInt(Rt2); constant integer n = UInt(Rn); constant boolean nontemporal = TRUE; constant integer datasize = 64; constant bits(64) offset = LSL(SignExtend(imm7, 64), 3); constant boolean tagchecked = n != 31;