BCAX

Bitwise clear and exclusive OR

Bitwise AND elements of the second source vector with the corresponding inverted elements of the third source vector, then exclusive OR the results with corresponding elements of the first source vector. The final results are destructively placed in the corresponding elements of the destination and first source vector. This instruction is unpredicated.

313029282726252423222120191817161514131211109876543210
00000100011Zm001110ZkZdn

BCAX <Zdn>.D, <Zdn>.D, <Zm>.D, <Zk>.D

if !IsFeatureImplemented(FEAT_SVE2) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED; constant integer m = UInt(Zm); constant integer k = UInt(Zk); constant integer dn = UInt(Zdn);

Assembler Symbols

<Zdn>

Is the name of the first source and destination scalable vector register, encoded in the "Zdn" field.

<Zm>

Is the name of the second source scalable vector register, encoded in the "Zm" field.

<Zk>

Is the name of the third source scalable vector register, encoded in the "Zk" field.

Operation

CheckSVEEnabled(); constant integer VL = CurrentVL; constant bits(VL) operand1 = Z[dn, VL]; constant bits(VL) operand2 = Z[m, VL]; constant bits(VL) operand3 = Z[k, VL]; Z[dn, VL] = operand1 EOR (operand2 AND NOT(operand3));

Operational information

If FEAT_SVE2 is implemented or FEAT_SME is implemented, then if PSTATE.DIT is 1:

This instruction might be immediately preceded in program order by a MOVPRFX instruction. The MOVPRFX must conform to all of the following requirements, otherwise the behavior of the MOVPRFX and this instruction is constrained unpredictable:


Internal version only: aarchmrs v2024-03_relA, pseudocode v2024-03_rel, sve v2024-03_rel ; Build timestamp: 2024-03-26T09:45

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