CCMN (immediate)

Conditional Compare Negative (immediate) sets the value of the condition flags to the result of the comparison of a register value and a negated immediate value if the condition is TRUE, and an immediate value otherwise.

313029282726252423222120191817161514131211109876543210
sf0111010010imm5cond10Rn0nzcv
op

32-bit (sf == 0)

CCMN <Wn>, #<imm>, #<nzcv>, <cond>

64-bit (sf == 1)

CCMN <Xn>, #<imm>, #<nzcv>, <cond>

integer n = UInt(Rn); integer datasize = if sf == '1' then 64 else 32; bits(4) flags = nzcv; bits(datasize) imm = ZeroExtend(imm5, datasize);

Assembler Symbols

<Wn>

Is the 32-bit name of the first general-purpose source register, encoded in the "Rn" field.

<Xn>

Is the 64-bit name of the first general-purpose source register, encoded in the "Rn" field.

<imm>

Is a five bit unsigned (positive) immediate encoded in the "imm5" field.

<nzcv>

Is the flag bit specifier, an immediate in the range 0 to 15, giving the alternative state for the 4-bit NZCV condition flags, encoded in the "nzcv" field.

<cond>

Is one of the standard conditions, encoded in the "cond" field in the standard way.

Operation

if ConditionHolds(cond) then bits(datasize) operand1 = X[n, datasize]; (-, flags) = AddWithCarry(operand1, imm, '0'); PSTATE.<N,Z,C,V> = flags;

Operational information

If PSTATE.DIT is 1:


Internal version only: isa v33.64, AdvSIMD v29.12, pseudocode v2023-06_rel, sve v2023-06_rel ; Build timestamp: 2023-07-04T19:42

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