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PTEST

Set condition flags for predicatepredicate.

Sets the First (N), None (Z), !Last (C) condition flags based on the predicate source register, and the V flag to zero.

.

Sets the First (N), None (Z), !Last (C) condition flags based on the predicate source register, and the V flag to zero.

313029282726252423222120191817161514131211109876543210
001001010101000011Pg0Pn00000
S

PTEST <Pg>, <Pn>.B

if !HaveSVE() then UNDEFINED; integer esize = 8; integer g = UInt(Pg); integer n = UInt(Pn);

Assembler Symbols

<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.

Operation

CheckSVEEnabled(); bits(PL) mask = P[g]; bits(PL) result = P[n]; PSTATE.<N,Z,C,V> = PredTest(mask, result, esize);


Internal version only: isa v32.12v32.06, AdvSIMD v29.04, pseudocode v2020-09_xmlv2020-06_rel, sve v2020-09_rc3v2020-06_rel0 ; Build timestamp: 2020-11-18T172020-07-03T12:2342

Copyright © 2010-2020 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.

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