Evaluation of 8-bit or 16-bit flag values
This instruction sets the PSTATE.NZV flags based on the value in the specified general-purpose register. SETF8 treats the value as an 8-bit value. SETF16 treats the value as a 16-bit value.
The PSTATE.C flag is not affected by these instructions.
| 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 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | sz | 0 | 0 | 1 | 0 | Rn | 0 | 1 | 1 | 0 | 1 | ||||
| sf | op | S | opcode2 | o3 | mask | ||||||||||||||||||||||||||
if !IsFeatureImplemented(FEAT_FlagM) then EndOfDecode(Decode_UNDEF); constant integer size = 8 << UInt(sz); constant integer n = UInt(Rn);
constant bits(32) reg = X[n, 32]; PSTATE.N = reg<size-1>; PSTATE.Z = if (reg<size-1:0> == Zeros(size)) then '1' else '0'; PSTATE.V = reg<size> EOR reg<size-1>; //PSTATE.C unchanged;
If PSTATE.DIT is 1:
Internal version only: aarchmrs v2024-12_rel, pseudocode v2024-12_rel ; Build timestamp: 2024-12-15T22:18
Copyright © 2010-2024 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.