Unsigned maximum reduction of quadword vector segments
Unsigned maximum of the same element numbers from each 128-bit source vector segment, placing each result into the corresponding element number of the 128-bit SIMD&FP destination register. Inactive elements in the source vector are treated as zero.
| 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 | size | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | Pg | Zn | Vd | |||||||||||
| U | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SVE2p1) && !IsFeatureImplemented(FEAT_SME2p1) then UNDEFINED; constant integer esize = 8 << UInt(size); constant integer g = UInt(Pg); constant integer n = UInt(Zn); constant integer d = UInt(Vd); constant boolean unsigned = TRUE;
| <Vd> |
Is the name of the destination SIMD&FP register, encoded in the "Vd" field. |
| <T> |
Is an arrangement specifier,
encoded in
|
| <Pg> |
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field. |
| <Zn> |
Is the name of the source scalable vector register, encoded in the "Zn" field. |
| <Tb> |
Is the size specifier,
encoded in
|
CheckSVEEnabled(); constant integer VL = CurrentVL; constant integer PL = VL DIV 8; constant integer segments = VL DIV 128; constant integer elempersegment = 128 DIV esize; constant bits(PL) mask = P[g, PL]; constant bits(VL) operand = if AnyActiveElement(mask, esize) then Z[n, VL] else Zeros(VL); bits(128) result = Zeros(128); bits(128) stmp = Zeros(128); integer dtmp; for e = 0 to elempersegment-1 dtmp = if unsigned then 0 else -(2^(esize-1)); for s = 0 to segments-1 if ActivePredicateElement(mask, s * elempersegment + e, esize) then stmp = Elem[operand, s, 128]; dtmp = Max(dtmp, UInt(Elem[stmp, e, esize])); Elem[result, e, esize] = dtmp<esize-1:0>; V[d, 128] = 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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