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SBC

Subtract with Carry.

This instruction is used by the alias NGC.

Syntax

SBC Wd, Wn, Wm ; 32-bit

SBC Xd, Xn, Xm ; 64-bit

Where:

Wd
Is the 32-bit name of the general-purpose destination register.
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.
Xd
Is the 64-bit name of the general-purpose destination 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.

Operation

Subtract with Carry subtracts a register value and the value of NOT (Carry flag) from a register value, and writes the result to the destination register.

Rd = Rn - Rm - 1 + C, where R is either W or X.

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