Contiguous load of bytes to 8-bit element ZA tile slice
The slice number within the tile is selected by the sum of the slice index register and an immediate, modulo the number of 8-bit elements in a Streaming SVE vector. The immediate is in the range 0 to 15. The memory address is generated by scalar base and optional scalar offset which is added to the base address. Inactive elements will not cause a read from Device memory or signal a fault, and are set to zero in the destination vector.
| 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 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Rm | V | Rs | Pg | Rn | 0 | imm4 | ||||||||||||||
| msz<1> | msz<0> | ||||||||||||||||||||||||||||||
if !HaveSME() then UNDEFINED; integer n = UInt(Rn); integer m = UInt(Rm); integer g = UInt('0':Pg); integer s = UInt('011':Rs); integer t = 0; integer imm = UInt(imm4); integer esize = 8; boolean vertical = V == '1';
| <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. |
| <imm> |
Is the slice index offset, in the range 0 to 15, encoded in the "imm4" field. |
| <Pg> |
Is the name of the governing scalable predicate register P0-P7, encoded in the "Pg" field. |
| <Xn|SP> |
Is the 64-bit name of the general-purpose base register or stack pointer, encoded in the "Rn" field. |
| <Xm> |
Is the optional 64-bit name of the general-purpose offset register, defaulting to XZR, encoded in the "Rm" field. |
CheckStreamingSVEAndZAEnabled(); integer dim = VL DIV esize; bits(64) base; bits(64) addr; bits(64) offset; bits(PL) mask = P[g]; bits(VL) result; bits(32) index = X[s]; integer slice = (UInt(index) + imm) MOD dim; constant integer mbytes = esize DIV 8; if HaveMTEExt() then SetTagCheckedInstruction(TRUE); if n == 31 then if LastActiveElement(mask, esize) >= 0 || ConstrainUnpredictableBool(Unpredictable_CHECKSPNONEACTIVE) then CheckSPAlignment(); base = SP[]; else base = X[n]; offset = X[m]; for e = 0 to dim - 1 addr = base + UInt(offset) * mbytes; if ElemP[mask, e, esize] == '1' then Elem[result, e, esize] = Mem[addr, mbytes, AccType_NORMAL]; else Elem[result, e, esize] = Zeros(); offset = offset + 1; ZAslice[t, esize, vertical, slice] = result;
Internal version only: isa v33.11seprel, AdvSIMD v29.05, pseudocode v2021-09_rel, sve v2021-09_rc3d ; Build timestamp: 2021-10-06T11:41
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