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CCMN (register)

Conditional Compare Negative (register).

Syntax

CCMN Wn, Wm, #nzcv, cond ; 32-bit

CCMN Xn, Xm, #nzcv, cond ; 64-bit

Where:

Wn
Is the 32-bit name of the first general-purpose source register.
Wm
Is the 32-bit name of the second general-purpose source register.
Xn
Is the 64-bit name of the first general-purpose source register.
Xm
Is the 64-bit name of the second general-purpose source register.
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.
cond
Is one of the standard conditions.

Operation

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

flags = if cond then compare(Rn, -Rm) else #nzcv, where R is either W or X.

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