Concatenate even or odd elements from two predicates
Concatenate adjacent even or odd-numbered elements from the first and second source predicates and place in elements of the destination predicate. This instruction is unpredicated.
It has encodings from 2 classes: Even and Odd
| 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 | 1 | 0 | 0 | Pn | 0 | Pd | ||||||||||
| H | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer n = UInt(Pn); constant integer m = UInt(Pm); constant integer d = UInt(Pd); constant integer part = 0;
| 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 | 1 | 1 | 0 | Pn | 0 | Pd | ||||||||||
| H | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer n = UInt(Pn); constant integer m = UInt(Pm); constant integer d = UInt(Pd); constant integer part = 1;
| <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); constant bits(PL) operand1 = P[n, PL]; constant bits(PL) operand2 = P[m, PL]; bits(PL) result; for p = 0 to pairs - 1 Elem[result, p, esize DIV 8] = Elem[operand1, 2*p+part, esize DIV 8]; for p = 0 to pairs - 1 Elem[result, pairs+p, esize DIV 8] = Elem[operand2, 2*p+part, 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 v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45
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