cmp.asm

; # CMP

    ; `cmp X, Y` does `X - Y` and ignores the exact result,
    ; but sets all flags that would be set on the subtraction.

    ; If operands are unsigned:

        ; ZF = (X == Y) ? 1 : 0
        ; CF = (X < Y) ? 1 : 0

    ; If operands are signed:

        ; ZF = (eax == ebx) ? 1 : 0
        ; if( eax < ebx)
            ; assert(OF == SF)
        ; else if(eax > ebx)
            ; assert(OF != SF)

%include "lib/asm_io.inc"

ENTRY
    mov eax, 0
    cmp eax, 0
    ASSERT_FLAG je
    ASSERT_EQ 0

    mov eax, 2
    cmp eax, 1
    ASSERT_FLAG jne
    ASSERT_EQ 2

    EXIT