integer n = UInt(Rn); integer t = UInt(Rt); integer t2 = UInt(Rt2); if opc<0> == '1' then UNDEFINED; integer scale = 2 + UInt(opc<1>); constant integer datasize = 8 << scale; bits(64) offset = LSL(SignExtend(imm7, 64), scale); boolean tagchecked = n != 31; boolean rt_unknown = FALSE; if t == t2 then Constraint c = ConstrainUnpredictable(Unpredictable_LDPOVERLAP); assert c IN {Constraint_UNKNOWN, Constraint_UNDEF, Constraint_NOP}; case c of when Constraint_UNKNOWN rt_unknown = TRUE; // result is UNKNOWN when Constraint_UNDEF UNDEFINED; when Constraint_NOP EndOfInstruction();

bits(64) address; bits(64) address2; bits(datasize) data1; bits(datasize) data2; constant integer dbytes = datasize DIV 8; boolean privileged = PSTATE.EL != EL0; AccessDescriptor accdesc = CreateAccDescGPR(MemOp_LOAD, TRUE, privileged, tagchecked); if n == 31 then CheckSPAlignment(); address = SP[]; else address = X[n, 64]; address = AddressAdd(address, offset, accdesc); if IsFeatureImplemented(FEAT_LSE2) then bits(2*datasize) full_data; accdesc.ispair = TRUE; full_data = Mem[address, 2*dbytes, accdesc]; if BigEndian(accdesc.acctype) then data2 = full_data<(datasize-1):0>; data1 = full_data<(2*datasize-1):datasize>; else data1 = full_data<(datasize-1):0>; data2 = full_data<(2*datasize-1):datasize>; else address2 = AddressIncrement(address, dbytes, accdesc); data1 = Mem[address, dbytes, accdesc]; data2 = Mem[address2, dbytes, accdesc]; if rt_unknown then data1 = bits(datasize) UNKNOWN; data2 = bits(datasize) UNKNOWN; X[t, datasize] = data1; X[t2, datasize] = data2;