Multi-vector signed saturating unsigned extract narrow
Saturate the signed integer value in each element of the two source vectors to unsigned integer value that is half the original source element width, and place the results in the half-width destination elements.
This instruction is unpredicated.
| 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 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | Zn | 0 | Zd | |||||||
| U | |||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2) then UNDEFINED; constant integer esize = 16; constant integer n = UInt(Zn:'0'); constant integer d = UInt(Zd);
| <Zd> |
Is the name of the destination scalable vector register, encoded in the "Zd" field. |
| <Zn1> |
Is the name of the first scalable vector register of the source multi-vector group, encoded as "Zn" times 2. |
| <Zn2> |
Is the name of the second scalable vector register of the source multi-vector group, encoded as "Zn" times 2 plus 1. |
CheckStreamingSVEEnabled(); constant integer VL = CurrentVL; constant integer elements = VL DIV (2 * esize); bits(VL) result; for r = 0 to 1 constant bits(VL) operand = Z[n+r, VL]; for e = 0 to elements-1 constant integer element = SInt(Elem[operand, e, 2 * esize]); Elem[result, r*elements + e, esize] = UnsignedSat(element, esize); Z[d, VL] = result;
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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