Propagate break to next partition
This instruction propagates break to next partition. If the Last active element of the first source predicate is false, then the destination predicate is set to all-false. Otherwise, the destination and second source predicates are left unchanged. This instruction does not set the condition flags.
| 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 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | Pg | 0 | Pn | 0 | Pdm | |||||||||
| S | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then EndOfDecode(Decode_UNDEF); end; let g : integer = UInt(Pg); let n : integer = UInt(Pn); let dm : integer = UInt(Pdm); let setflags : boolean = FALSE;
| <Pdm> |
Is the name of the second source and destination scalable predicate register, encoded in the "Pdm" field. |
| <Pg> |
Is the name of the governing scalable predicate register, encoded in the "Pg" field. |
| <Pn> |
Is the name of the first source scalable predicate register, encoded in the "Pn" field. |
CheckSVEEnabled(); let VL : integer{} = CurrentVL(); let PL : integer{} = VL DIV 8; let mask : bits(PL) = P{}(g); let operand1 : bits(PL) = P{}(n); let operand2 : bits(PL) = P{}(dm); var result : bits(PL); if LastActive{PL}(mask, operand1, 8) == '1' then result = operand2; else result = Zeros{PL}; end; if setflags then PSTATE.[N,Z,C,V] = PredTest{PL}(Ones{PL}, result, 8); end; P{PL}(dm) = result;
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.