asmprog:	comment ?	statement	asmprog ; asmprog	asmprog comment ? \n asmprogletter:	[._a-zA-Z]digit:	[0-9]identifier:	letter (letter | digit)*	digit [bf]string:	'C-like string sequence'	"C-like string sequence"number:	C-like numbercomment:	! .*statement:	label-definition statement	empty	assignment	instruction	pseudo-instructionlabel-definition:	identifier :	digit :assignment:	identifier = expressioninstruction:	iX86-instructionpseudo-instruction:	.extern identifier (, identifier)*	.define identifier (, identifier)*	.data1 expression (, expression)*	.data2 expression (, expression)*	.data4 expression (, expression)*	.ascii string	.asciz string	.align expression	.space expression	.comm identifier , expression	.sect identifier	.base expression	.assert expression	.symb XXX	.line XXX	.file XXX	.nolist	.list	iX86-pseudoexpression:	C-like expression with [ and ] for groupingiX86-instruction:	prefix	prefix iX86-instruction	identifier	identifier iX86operand	identifier iX86operand , iX86operand	identifier iX86operand : iX86operandprefix:	o16	o32	a16	a32	rep	repz	repnz	repe	repne	cseg | dseg | eseg | fseg | gseg | ssegiX86operand:	register	( register )	expression	( expression )	expression ( register )	expression ( register * [1248] )	expression ? ( register ) ( register )	expression ? ( register ) ( register * [1248] )register:	al | bl | cl | dl | ah | bh | ch | dh	ax | bx | cx | dx | si | di | bp | sp	eax | ebx | ecx | edx | esi | edi | ebp | esp	cs | ds | es | fs | gs | ss	cr0 | cr1 | cr2 | cr3iX86-pseudo:	.use16	.use32