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NEG pseudo-instruction

Negate the value in a register.


NEG{cond} Rd, Rm



is an optional condition code.


is the destination register.


is the register containing the value that is subtracted from zero.


The NEG pseudo-instruction negates the value in one register and stores the result in a second register.

NEG{cond} Rd, Rm assembles to RSBS{cond} Rd, Rm, #0.


The 32-bit encoding of this pseudo-instruction is available in A32 and T32.

There is no 16-bit encoding of this pseudo-instruction available T32.

Register restrictions

In A32 instructions, using SP or PC for Rd or Rm is deprecated. In T32 instructions, you cannot use SP or PC for Rd or Rm.

Condition flags

This pseudo-instruction updates the condition flags, based on the result.

Related reference

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