Add horizontally vector elements to ZA tile
Add each element of the source vector to the corresponding active element of each horizontal slice of a ZA tile. The tile elements are predicated by a pair of governing predicates. An element of a horizontal slice is considered active if its corresponding element in the second governing predicate is TRUE and the element corresponding to its horizontal slice number in the first governing predicate is TRUE. Inactive elements in the destination tile remain unmodified.
ID_AA64SMFR0_EL1.I16I64 indicates whether the 64-bit integer variant is implemented.
It has encodings from 2 classes: 32-bit and 64-bit
| 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 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | Pm | Pn | Zn | 0 | 0 | 0 | ZAda | |||||||||
| V | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer esize = 32; constant integer a = UInt(Pn); constant integer b = UInt(Pm); constant integer n = UInt(Zn); constant integer da = UInt(ZAda);
| 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 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | Pm | Pn | Zn | 0 | 0 | ZAda | ||||||||||
| V | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME_I16I64) then UNDEFINED; constant integer esize = 64; constant integer a = UInt(Pn); constant integer b = UInt(Pm); constant integer n = UInt(Zn); constant integer da = UInt(ZAda);
| <ZAda> |
For the 32-bit variant: is the name of the ZA tile ZA0-ZA3, encoded in the "ZAda" field. |
|
For the 64-bit variant: is the name of the ZA tile ZA0-ZA7, encoded in the "ZAda" field. |
| <Pn> |
Is the name of the first governing scalable predicate register P0-P7, encoded in the "Pn" field. |
| <Pm> |
Is the name of the second governing scalable predicate register P0-P7, encoded in the "Pm" field. |
| <Zn> |
Is the name of the source scalable vector register, encoded in the "Zn" field. |
CheckStreamingSVEAndZAEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer dim = VL DIV esize; constant bits(PL) mask1 = P[a, PL]; constant bits(PL) mask2 = P[b, PL]; constant bits(VL) operand_src = Z[n, VL]; constant bits(dim*dim*esize) operand_acc = ZAtile[da, esize, dim*dim*esize]; bits(dim*dim*esize) result; for col = 0 to dim-1 constant bits(esize) element = Elem[operand_src, col, esize]; for row = 0 to dim-1 bits(esize) res = Elem[operand_acc, row*dim+col, esize]; if (ActivePredicateElement(mask1, row, esize) && ActivePredicateElement(mask2, col, esize)) then res = res + element; Elem[result, row*dim+col, esize] = res; ZAtile[da, esize, dim*dim*esize] = result;
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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