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SUBS (immediate)
Subtract (immediate), setting flags.
This instruction is used by the alias CMP (immediate).
Syntax
SUBS
Wd, Wn|WSP, #imm{, shift} ; 32-bit
SUBS
Xd, Xn|SP, #imm{, shift} ; 64-bit
Where:
Wd- Is the 32-bit name of the general-purpose destination register.
Wn|WSP- Is the 32-bit name of the source general-purpose register or stack pointer.
Xd- Is the 64-bit name of the general-purpose destination register.
Xn|SP- Is the 64-bit name of the source general-purpose register or stack pointer.
imm- Is an unsigned immediate, in the range 0 to 4095.
shift-
Is the optional left shift to apply to the immediate, defaulting to
LSL #0, and can be eitherLSL #0orLSL #12.
Operation
Subtract (immediate), setting flags, subtracts an optionally-shifted immediate value from a register value, and writes the result to the destination register. It updates the condition flags based on the result.
Rd = Rn - shift(imm)RW or X.