immediate-1/4 ( dst imm reg,rex.w,opcode -- )

Vocabulary

cpu.x86.assembler.private

Inputs

dst	dst
imm	imm
reg,rex.w,opcode	a sequence

Outputs

None

Word description

If imm is a byte, compile the opcode and the byte. Otherwise, set the 8-bit operand flag in the opcode, and compile the cell. The 'reg' is not really a register, but a value for the 'reg' field of the mod-r/m byte.

Definition

USING: kernel ;

IN: cpu.x86.assembler.private

: immediate-1/4 ( dst imm reg,rex.w,opcode -- )
    over fits-in-byte?
    [ immediate-fits-in-size-bit immediate-1 ] [ immediate-4 ]
    if ;