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16.36 CCMN (register)

Conditional Compare Negative (register).

Syntax

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

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

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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