Contiguous load of quadwords to 128-bit element ZA tile slice
The slice number in the tile is selected by the slice index register, modulo the number of 128-bit elements in a Streaming SVE vector. The memory address is generated by scalar base and optional scalar offset which is multiplied by 16 and 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 | 1 | 1 | 1 | 0 | Rm | V | Rs | Pg | Rn | 0 | ZAt | ||||||||||||||
if !HaveSME() then UNDEFINED; integer n = UInt(Rn); integer m = UInt(Rm); integer g = UInt('0':Pg); integer s = UInt('011':Rs); integer t = UInt(ZAt); integer imm = 0; integer esize = 128; boolean vertical = V == '1';
| <ZAt> |
Is the name of the ZA tile ZA0-ZA15 to be accessed, encoded in the "ZAt" 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. |
| <imm> |
Is the slice index offset 0. |
| <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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