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Counts the number of active and true elements in the source predicate and places the scalar result in the destination general-purpose register. Inactive predicate elements are not counted.
Set scalar to count of true predicate elements.
Counts the number of active and true elements in the source predicate and places the scalar result in the destination general-purpose register. Inactive predicate elements are not counted.
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 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | size | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | Pg | 0 | Pn | Rd |
if !HaveSVE() then UNDEFINED; integer esize = 8 << UInt(size); integer g = UInt(Pg); integer n = UInt(Pn); integer d = UInt(Rd);
<Xd> | Is the 64-bit name of the destination general-purpose register, encoded in the "Rd" field. |
<Pg> | Is the name of the governing scalable predicate register, encoded in the "Pg" field. |
<Pn> | Is the name of the source scalable predicate register, encoded in the "Pn" field. |
<T> |
Is the size specifier,
encoded in
size:
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CheckSVEEnabled(); integer elements = VL DIV esize; bits(PL) mask = P[g]; bits(PL) operand = P[n]; bits(64) sum = Zeros(); for e = 0 to elements-1 if ElemP[mask, e, esize] == '1' && ElemP[operand, e, esize] == '1' then sum = sum + 1; X[d] = sum;
Internal version only: isa v32.13v32.12, AdvSIMD v29.05v29.04, pseudocode v2020-12v2020-09_xml, sve v2020-12v2020-09_rc3
; Build timestamp: 2020-12-16T142020-11-18T17:1723
Copyright © 2010-2020 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
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