isCpuidAvailable function

global _isCpuidAvailable

segment .text align=16

_isCpuidAvailable:
	pushf
	pop eax

	mov edx, eax
	xor edx, 0x200000	; Try to change the 21th bit (ID bit)

	push edx
	popf
	pushf
	pop eax
	push ecx
	popf

	cmp ecx, eax
	setne al	; If we can change the ID bit, that means cpuid is available
	ret