Arm Compiler armasm User Guide : 16.44 CCMP (immediate)

16.44 CCMP (immediate)

Conditional Compare (immediate).

Syntax

CCMP Wn, #imm, #nzcv, cond ; 32-bit

CCMP Xn, #imm, #nzcv, cond ; 64-bit

Where:

Wn: Is the 32-bit name of the first general-purpose source register.
Xn: Is the 64-bit name of the first general-purpose source register.
imm: Is a five bit unsigned immediate.
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 (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.

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

Related references

16.1 A64 instructions in alphabetical order

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