Interleave elements from two half predicates
Interleave alternating elements from the lowest or highest halves of the first and second source predicates and place in elements of the destination predicate. This instruction is unpredicated.
It has encodings from 2 classes: High halves and Low halves
| 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 | Pm | 0 | 1 | 0 | 0 | 0 | 1 | 0 | Pn | 0 | Pd | ||||||||||
| H | |||||||||||||||||||||||||||||||
if !HaveSVE() && !HaveSME() then UNDEFINED; constant integer esize = 8 << UInt(size); integer n = UInt(Pn); integer m = UInt(Pm); integer d = UInt(Pd); integer part = 1;
| 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 | Pm | 0 | 1 | 0 | 0 | 0 | 0 | 0 | Pn | 0 | Pd | ||||||||||
| H | |||||||||||||||||||||||||||||||
if !HaveSVE() && !HaveSME() then UNDEFINED; constant integer esize = 8 << UInt(size); integer n = UInt(Pn); integer m = UInt(Pm); integer d = UInt(Pd); integer part = 0;
| <Pd> |
Is the name of the destination scalable predicate register, encoded in the "Pd" field. |
| <T> |
Is the size specifier,
encoded in
|
| <Pn> |
Is the name of the first source scalable predicate register, encoded in the "Pn" field. |
| <Pm> |
Is the name of the second source scalable predicate register, encoded in the "Pm" field. |
CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer pairs = VL DIV (esize * 2); bits(PL) operand1 = P[n, PL]; bits(PL) operand2 = P[m, PL]; bits(PL) result; integer base = part * pairs; for p = 0 to pairs-1 Elem[result, 2*p+0, esize DIV 8] = Elem[operand1, base+p, esize DIV 8]; Elem[result, 2*p+1, esize DIV 8] = Elem[operand2, base+p, esize DIV 8]; P[d, PL] = result;
If FEAT_SVE2 is implemented or FEAT_SME is implemented, then if PSTATE.DIT is 1:
Internal version only: aarchmrs v2023-12_rel, pseudocode v2023-12_rel, sve v2023-12_rel ; Build timestamp: 2023-12-15T16:46
Copyright © 2010-2023 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.