Bitwise select
Selects bits from the first source vector where the corresponding bit in the third source vector is '1', and from the second source vector where the corresponding bit in the third source vector is '0'. The result is placed destructively in the destination and first source vector. This instruction is unpredicated.
| 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 | 0 | 0 | 0 | 1 | Zm | 0 | 0 | 1 | 1 | 1 | 1 | Zk | Zdn | ||||||||||||
if !HaveSVE2() && !HaveSME() then UNDEFINED; integer m = UInt(Zm); integer k = UInt(Zk); integer dn = UInt(Zdn);
| <Zdn> |
Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field. |
| <Zm> |
Is the name of the second source scalable vector register, encoded in the "Zm" field. |
| <Zk> |
Is the name of the third source scalable vector register, encoded in the "Zk" field. |
CheckSVEEnabled(); bits(VL) operand1 = Z[dn]; bits(VL) operand2 = Z[m]; bits(VL) operand3 = Z[k]; Z[dn] = (operand1 AND operand3) OR (operand2 AND NOT(operand3));
If FEAT_SVE2 is enabled or FEAT_SME is enabled, then when PSTATE.DIT is 1:
This instruction might be immediately preceded in program order by a MOVPRFX instruction. The MOVPRFX instruction must conform to all of the following requirements, otherwise the behavior of the MOVPRFX and this instruction is unpredictable:
Internal version only: isa v33.11seprel, AdvSIMD v29.05, pseudocode v2021-09_rel, sve v2021-09_rc3d ; Build timestamp: 2021-10-06T11:41
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