Move and zero ZA tile slice to Z vector
This instruction operates on a horizontal or vertical slice within a named ZA tile of the specified element size. The tile slice is zeroed after moving its contents to the destination vector.
The slice number within the tile is selected by the sum of the slice index register and immediate offset, modulo the number of such elements in a vector. The immediate offset is in the range 0 to the number of elements in a 128-bit vector segment minus 1.
This instruction is unpredicated.
It has encodings from 5 classes: 8-bit , 16-bit , 32-bit , 64-bit and 128-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 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | V | Rs | 0 | 0 | 0 | 1 | off4 | Zd | ||||||||
| size | Q | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2p1) then EndOfDecode(Decode_UNDEF); end; let s : integer = UInt('011'::Rs); let n : integer = 0; let offset : integer = UInt(off4); let esize : integer{} = 8; let d : integer = UInt(Zd); let vertical : boolean = V == '1';
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| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | V | Rs | 0 | 0 | 0 | 1 | ZAn | off3 | Zd | |||||||
| size | Q | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2p1) then EndOfDecode(Decode_UNDEF); end; let s : integer = UInt('011'::Rs); let n : integer = UInt(ZAn); let offset : integer = UInt(off3); let esize : integer{} = 16; let d : integer = UInt(Zd); let vertical : boolean = V == '1';
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| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | V | Rs | 0 | 0 | 0 | 1 | ZAn | off2 | Zd | |||||||
| size | Q | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2p1) then EndOfDecode(Decode_UNDEF); end; let s : integer = UInt('011'::Rs); let n : integer = UInt(ZAn); let offset : integer = UInt(off2); let esize : integer{} = 32; let d : integer = UInt(Zd); let vertical : boolean = V == '1';
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| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | V | Rs | 0 | 0 | 0 | 1 | ZAn | o1 | Zd | |||||||
| size | Q | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2p1) then EndOfDecode(Decode_UNDEF); end; let s : integer = UInt('011'::Rs); let n : integer = UInt(ZAn); let offset : integer = UInt(o1); let esize : integer{} = 64; let d : integer = UInt(Zd); let vertical : boolean = V == '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 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | V | Rs | 0 | 0 | 0 | 1 | ZAn | Zd | ||||||||
| size | Q | ||||||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_SME2p1) then EndOfDecode(Decode_UNDEF); end; let s : integer = UInt('011'::Rs); let n : integer = UInt(ZAn); let offset : integer = 0; let esize : integer{} = 128; let d : integer = UInt(Zd); let vertical : boolean = V == '1';
| <Zd> |
Is the name of the destination scalable vector register, encoded in the "Zd" field. |
| <HV> |
Is the horizontal or vertical slice indicator,
encoded in
|
| <Ws> |
Is the 32-bit name of the slice index register W12-W15, encoded in the "Rs" field. |
CheckStreamingSVEAndZAEnabled(); let VL : integer{} = CurrentVL(); let PL : integer{} = VL DIV 8; let dim : integer = VL DIV esize; let index : bits(32) = X{}(s); let slice : integer = (UInt(index) + offset) MOD dim; let operand : bits(VL) = ZAslice{}(n, esize, vertical, slice); ZAslice{VL}(n, esize, vertical, slice) = Zeros{VL}; Z{VL}(d) = operand;
This instruction is a data-independent-time instruction as described in About PSTATE.DIT.
2026-03_rel 2026-03-26 20:48:11
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