Count matching elements in vector segments
This instruction compares each 8-bit byte element of the first source vector with all of the elements in the corresponding 128-bit segment of the second source vector and places the count of matching elements in the corresponding element of the destination vector. 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 |
| 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | size | 1 | Zm | 1 | 0 | 1 | 0 | 0 | 0 | Zn | Zd | |||||||||||||
if !HaveSVE2() then UNDEFINED; if size != '00' then UNDEFINED; integer esize = 8; integer d = UInt(Zd); integer n = UInt(Zn); integer m = UInt(Zm);
| <Zd> |
Is the name of the destination scalable vector register, encoded in the "Zd" field. |
| <Zn> |
Is the name of the first source scalable vector register, encoded in the "Zn" field. |
| <Zm> |
Is the name of the second source scalable vector register, encoded in the "Zm" field. |
CheckNonStreamingSVEEnabled(); integer segments = VL DIV 128; integer eltspersegment = 128 DIV esize; bits(VL) operand1 = Z[n]; bits(VL) operand2 = Z[m]; bits(VL) result; for b = 0 to segments-1 for s = 0 to eltspersegment-1 integer count = 0; integer e = eltspersegment * b + s; bits(esize) element1 = Elem[operand1, e, esize]; for i = 0 to eltspersegment-1 integer e2 = eltspersegment * b + i; bits(esize) element2 = Elem[operand2, e2, esize]; if element1 == element2 then count = count + 1; Elem[result, e, esize] = count<esize-1:0>; Z[d] = 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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