Copy general-purpose register to vector elements (predicated)
This instruction copies the general-purpose scalar source register to each Active element in the destination vector. Inactive elements in the destination vector register remain unmodified.
This instruction is used by the alias MOV (scalar, predicated).
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | size | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | Pg | Rn | Zd | |||||||||||
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then EndOfDecode(Decode_UNDEF); end; let esize : integer{} = 8 << UInt(size); let g : integer = UInt(Pg); let n : integer = UInt(Rn); let d : integer = UInt(Zd);
| <Zd> |
Is the name of the destination scalable vector register, encoded in the "Zd" field. |
| <T> |
Is the size specifier,
encoded in
|
| <Pg> |
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field. |
| <R> |
Is a width specifier,
encoded in
|
| <n|SP> |
Is the number [0-30] of the general-purpose source register or the name SP (31), encoded in the "Rn" field. |
CheckSVEEnabled(); let VL : integer{} = CurrentVL(); let PL : integer{} = VL DIV 8; let elements : integer = VL DIV esize; let mask : bits(PL) = P{}(g); var result : bits(VL) = Z{}(d); if AnyActiveElement{PL}(mask, esize) then var operand1 : bits(64); if n == 31 then operand1 = SP{64}(); else operand1 = X{64}(n); end; for e = 0 to elements-1 do if ActivePredicateElement{PL}(mask, e, esize) then result[e*:esize] = operand1[esize-1:0]; end; end; end; Z{VL}(d) = result;
This instruction is a data-independent-time instruction as described in About PSTATE.DIT.
This instruction might be immediately preceded in program order by a MOVPRFX instruction. The MOVPRFX must conform to all of the following requirements, otherwise the behavior of the MOVPRFX and this instruction is CONSTRAINED UNPREDICTABLE:
2026-03_rel 2026-03-26 20:48:11
Copyright © 2010-2026 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.