(%inc) ( n reg -- )
CPU x86 compiler backend

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decr-stack-reg ( n -- )

Vocabulary
cpu.x86

Inputs

n	a number
reg	a register symbol

Outputs
None

Word description
Emits machine code for increasing or decreasing the given register a number of cell sizes bytes.

Examples

USING: cpu.x86 make prettyprint ; [ 8 ECX (%inc) ] B{ } make disassemble
00000000615e5140: 83c140 add ecx, 0x40

Definition

USING: cpu.x86.assembler kernel layouts math ;

IN: cpu.x86

: (%inc) ( n reg -- )
    swap cells dup 0 > [ ADD ] [ neg SUB ] if ; inline