CCMP (immediate)

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

313029282726252423222120191817161514131211109876543210
sf1111010010imm5cond10Rn0nzcv
opSo2o3

32-bit (sf == 0)

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

64-bit (sf == 1)

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

integer n = UInt(Rn); constant integer datasize = 32 << UInt(sf); bits(4) condition = cond; 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.

<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 standard way, and encoded in cond:

cond <cond>
0000 EQ
0001 NE
0010 CS
0011 CC
0100 MI
0101 PL
0110 VS
0111 VC
1000 HI
1001 LS
1010 GE
1011 LT
1100 GT
1101 LE
1110 AL
1111 NV
<Xn>

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

Operation

if ConditionHolds(condition) then bits(datasize) operand1 = X[n, datasize]; bits(datasize) operand2 = NOT(imm); (-, flags) = AddWithCarry(operand1, operand2, '1'); PSTATE.<N,Z,C,V> = flags;

Operational information

If PSTATE.DIT is 1:


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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