CheckNonStreamingSVEEnabled(); integer elements = VL DIV esize; bits(64) base; bits(PL) mask = P[g]; bits(VL) result; bits(VL) orig = Z[t]; bits(msize) data; bits(64) offset; constant integer mbytes = msize DIV 8; boolean first = TRUE; boolean fault = FALSE; boolean faulted = FALSE; boolean unknown = FALSE; if HaveMTEExt() then SetTagCheckedInstruction(TRUE); if !AnyActiveElement(mask, esize) then if n == 31 && ConstrainUnpredictableBool(Unpredictable_CHECKSPNONEACTIVE) then CheckSPAlignment(); else if n == 31 then CheckSPAlignment(); base = if n == 31 then SP[] else X[n]; offset = X[m]; for e = 0 to elements-1 if ElemP[mask, e, esize] == '1' then bits(64) addr = base + (UInt(offset) + e) * mbytes; if first then // Mem[] will not return if a fault is detected for the first active element data = Mem[addr, mbytes, AccType_NORMAL]; first = FALSE; else // MemNF[] will return fault=TRUE if access is not performed for any reason (data, fault) = MemNF[addr, mbytes, AccType_CNOTFIRST]; else (data, fault) = (Zeros(msize), FALSE); // FFR elements set to FALSE following a supressed access/fault faulted = faulted || fault; if faulted then ElemFFR[e, esize] = '0'; // Value becomes CONSTRAINED UNPREDICTABLE after an FFR element is FALSE unknown = unknown || ElemFFR[e, esize] == '0'; if unknown then if !fault && ConstrainUnpredictableBool(Unpredictable_SVELDNFDATA) then Elem[result, e, esize] = Extend(data, esize, unsigned); elsif ConstrainUnpredictableBool(Unpredictable_SVELDNFZERO) then Elem[result, e, esize] = Zeros(); else // merge Elem[result, e, esize] = Elem[orig, e, esize]; else Elem[result, e, esize] = Extend(data, esize, unsigned); Z[t] = result;