#    This file is part of Metasm, the Ruby assembly manipulation suite
#    Copyright (C) 2007 Yoann GUILLOT
#
#    Licence is LGPL, see LICENCE in the top-level directory


require 'metasm/ia32/main'

module Metasm
class Ia32
	def init_cpu_constants
		@opcode_list ||= []
		@fields_mask.update :w => 1, :s => 1, :d => 1, :modrm => 0xc7,
			:reg => 7, :eeec => 7, :eeed => 7, :seg2 => 3, :seg3 => 7,
			:regfp => 7, :regmmx => 7, :regxmm => 7
		@fields_mask[:seg2A]    = @fields_mask[:seg2]
		@fields_mask[:seg3A]    = @fields_mask[:seg3]
		@fields_mask[:modrmA]   = @fields_mask[:modrm]

		@valid_args.concat [:i, :i8, :u8, :u16, :reg, :seg2, :seg2A,
			:seg3, :seg3A, :eeec, :eeed, :modrm, :modrmA, :mrm_imm,
			:farptr, :imm_val1, :imm_val3, :reg_cl, :reg_eax,
			:reg_dx, :regfp, :regfp0, :modrmmmx, :regmmx,
			:modrmxmm, :regxmm] - @valid_args

		@valid_props.concat [:strop, :stropz, :opsz, :argsz, :setip,
			:stopexec, :saveip, :unsigned_imm, :random, :needpfx,
			:xmmx] - @valid_props
	end

	# only most common instructions from the 386 instruction set
	# inexhaustive list :
	# no aaa, arpl, mov crX, call/jmp/ret far, in/out, bts, xchg...
	def init_386_common_only
		init_cpu_constants

		addop_macro1 'adc', 2
		addop_macro1 'add', 0
		addop_macro1 'and', 4, :u
		addop 'bswap', [0x0F, 0xC8], :reg
		addop 'call',  [0xE8], nil,  {}, :stopexec, :setip, :i, :saveip
		addop 'call',  [0xFF], 2,    {}, :stopexec, :setip, :saveip
		addop('cbw',   [0x98]) { |o| o.props[:opsz] = 16 }
		addop('cdq',   [0x99]) { |o| o.props[:opsz] = 32 }
		addop_macro1 'cmp', 7
		addop_macrostr 'cmps',  [0xA6], :stropz
		addop 'dec',   [0x48], :reg
		addop 'dec',   [0xFE], 1,    {:w => [0, 0]}
		addop 'div',   [0xF6], 6,    {:w => [0, 0]}
		addop 'enter', [0xC8], nil,  {}, :u16, :u8
		addop 'idiv',  [0xF6], 7,    {:w => [0, 0]}
		addop 'imul',  [0xF6], 5,    {:w => [0, 0]}, :reg_eax
		addop 'imul',  [0x0F, 0xAF], :mrm
		addop 'imul',  [0x69], :mrm, {:s => [0, 1]}, :i
		addop 'inc',   [0x40], :reg
		addop 'inc',   [0xFE], 0,    {:w => [0, 0]}
		addop 'int',   [0xCC], nil,  {}, :imm_val3, :stopexec
		addop 'int',   [0xCD], nil,  {}, :u8
		addop_macrotttn 'j', [0x70], nil, {}, :setip, :i8
		addop_macrotttn 'j', [0x0F, 0x80], nil, {}, :setip, :i
		addop 'jmp',   [0xE9], nil,  {:s => [0, 1]}, :setip, :i,  :stopexec
		addop 'jmp',   [0xFF], 4,    {}, :setip, :stopexec
		addop 'lea',   [0x8D], :mrmA
		addop 'leave', [0xC9]
		addop_macrostr 'lods',  [0xAC], :strop
		addop 'loop',  [0xE2], nil,  {}, :setip, :i8
		addop 'loopz', [0xE1], nil,  {}, :setip, :i8
		addop 'loope', [0xE1], nil,  {}, :setip, :i8
		addop 'loopnz',[0xE0], nil,  {}, :setip, :i8
		addop 'loopne',[0xE0], nil,  {}, :setip, :i8
		addop 'mov',   [0xA0], nil,  {:w => [0, 0], :d => [0, 1]}, :mrm_imm, :reg_eax
		addop 'mov',   [0x88], :mrmw,{:d => [0, 1]}
		addop 'mov',   [0xB0], :reg, {:w => [0, 3]}, :u
		addop 'mov',   [0xC6], 0,    {:w => [0, 0]}, :u
		addop_macrostr 'movs',  [0xA4], :strop
		addop 'movsx', [0x0F, 0xBE], :mrmw
		addop 'movzx', [0x0F, 0xB6], :mrmw
		addop 'mul',   [0xF6], 4,    {:w => [0, 0]}
		addop 'neg',   [0xF6], 3,    {:w => [0, 0]}
		addop 'nop',   [0x90]
		addop 'not',   [0xF6], 2,    {:w => [0, 0]}
		addop_macro1 'or', 1, :u
		addop 'pop',   [0x58], :reg
		addop 'pop',   [0x8F], 0
		addop 'push',  [0x50], :reg
		addop 'push',  [0xFF], 6
		addop 'push',  [0x68], nil,  {:s => [0, 1]}, :i
		addop 'ret',   [0xC3], nil,  {}, :stopexec, :setip
		addop 'ret',   [0xC2], nil,  {}, :stopexec, :u16, :setip
		addop_macro3 'rol', 0
		addop_macro3 'ror', 1
		addop_macro3 'sar', 7
		addop_macro1 'sbb', 3
		addop_macrostr 'scas',  [0xAE], :stropz
		addop_macrotttn('set', [0x0F, 0x90], 0) { |o| o.props[:argsz] = 8 }
		addop_macrotttn('set', [0x0F, 0x90], :mrm) { |o| o.props[:argsz] = 8 ; o.args.reverse! }	# :reg field is unused
		addop_macro3 'shl', 4
		addop_macro3 'sal', 4
		addop 'shld',  [0x0F, 0xA4], :mrm, {}, :u8
		addop 'shld',  [0x0F, 0xA5], :mrm, {}, :reg_cl
		addop_macro3 'shr', 5
		addop 'shrd',  [0x0F, 0xAC], :mrm, {}, :u8
		addop 'shrd',  [0x0F, 0xAD], :mrm, {}, :reg_cl
		addop_macrostr 'stos',  [0xAA], :strop
		addop_macro1 'sub', 5
		addop 'test',  [0x84], :mrmw
		addop 'test',  [0xA8], nil,  {:w => [0, 0]}, :reg_eax, :u
		addop 'test',  [0xF6], 0,    {:w => [0, 0]}, :u
		addop_macro1 'xor', 6, :u
	end

	def init_386_only
		init_cpu_constants

		addop 'aaa',   [0x37]
		addop 'aad',   [0xD5, 0x0A]
		addop 'aam',   [0xD4, 0x0A]
		addop 'aas',   [0x3F]
		addop 'arpl',  [0x63], :mrm
		addop 'bound', [0x62], :mrmA
		addop 'bsf',   [0x0F, 0xBC], :mrm
		addop 'bsr',   [0x0F, 0xBD], :mrm
		addop_macro2 'bt' , 0
		addop_macro2 'btc', 3
		addop_macro2 'btr', 2
		addop_macro2 'bts', 1
		addop 'call',  [0x9A], nil,  {}, :stopexec, :setip, :farptr, :saveip
		addop 'callf', [0xFF], 3,    {}, :stopexec, :setip, :saveip
		addop 'clc',   [0xF8]
		addop 'cld',   [0xFC]
		addop 'cli',   [0xFA]
		addop 'clts',  [0x0F, 0x06]
		addop 'cmc',   [0xF5]
		addop('cmpxchg',[0x0F, 0xB0], :mrmw) { |o| o.args.reverse! }
		addop 'cpuid', [0x0F, 0xA2]
		addop('cwd',   [0x99]) { |o| o.props[:opsz] = 16 }
		addop('cwde',  [0x98]) { |o| o.props[:opsz] = 32 }
		addop 'daa',   [0x27]
		addop 'das',   [0x2F]
		addop 'hlt',   [0xF4], nil, {}, :stopexec
		addop 'in',    [0xE4], nil,  {:w => [0, 0]}, :reg_eax, :u8
		addop 'in',    [0xE4], nil,  {:w => [0, 0]}, :u8
		addop 'in',    [0xEC], nil,  {:w => [0, 0]}, :reg_eax, :reg_dx
		addop 'in',    [0xEC], nil,  {:w => [0, 0]}, :reg_eax
		addop 'in',    [0xEC], nil,  {:w => [0, 0]}
		addop_macrostr 'ins',   [0x6C], :strop
		addop 'into',  [0xCE]
		addop 'invd',  [0x0F, 0x08]
		addop 'invlpg',[0x0F, 0x01, 7<<3], :modrmA
		addop('movd',  [0x0F, 0x6E], :mrmmmx, {:d => [1, 4]}) { |o| o.args[o.args.index(:modrmmmx)] = :modrm }
		addop 'iret',  [0xCF], nil,  {}, :stopexec, :setip
		addop 'iretd', [0xCF], nil,  {}, :stopexec, :setip
		addop('jcxz',  [0xE3], nil,  {}, :setip, :i8) { |o| o.props[:opsz] = 16 }
		addop('jecxz', [0xE3], nil,  {}, :setip, :i8) { |o| o.props[:opsz] = 32 }
		addop 'jmp',   [0xEA], nil,  {}, :farptr, :stopexec
		addop 'jmpf',  [0xFF], 5,    {}, :stopexec		# reg ?
		addop 'lahf',  [0x9F]
		addop 'lar',   [0x0F, 0x02], :mrm
		addop 'lds',   [0xC5], :mrmA
		addop 'les',   [0xC4], :mrmA
		addop 'lfs',   [0x0F, 0xB4], :mrmA
		addop 'lgs',   [0x0F, 0xB5], :mrmA
		addop 'lgdt',  [0x0F, 0x01], 2
		addop 'lidt',  [0x0F, 0x01, 3<<3], :modrmA
		addop 'lldt',  [0x0F, 0x00], 2
		addop 'lmsw',  [0x0F, 0x01], 6
# prefix	addop 'lock',  [0xF0]
		addop 'lsl',   [0x0F, 0x03], :mrm
		addop 'lss',   [0x0F, 0xB2], :mrmA
		addop 'ltr',   [0x0F, 0x00], 3
		addop('mov',   [0x0F, 0x20, 0xC0], :reg, {:d => [1, 1], :eeec => [2, 3]}, :eeec) { |op| op.args.reverse! }
		addop('mov',   [0x0F, 0x21, 0xC0], :reg, {:d => [1, 1], :eeed => [2, 3]}, :eeed) { |op| op.args.reverse! }
		addop('mov',   [0x8C], 0,    {:d => [0, 1], :seg3 => [1, 3]}, :seg3) { |op| op.args.reverse! }
		addop 'out',   [0xE6], nil,  {:w => [0, 0]}, :reg_eax, :u8
		addop 'out',   [0xE6], nil,  {:w => [0, 0]}, :u8
		addop 'out',   [0xEE], nil,  {:w => [0, 0]}, :reg_eax, :reg_dx
		addop 'out',   [0xEE], nil,  {:w => [0, 0]}, :reg_eax			# implicit arguments
		addop 'out',   [0xEE], nil,  {:w => [0, 0]}
		addop_macrostr 'outs',  [0x6E], :strop
		addop 'pop',   [0x07], nil,  {:seg2A => [0, 3]}, :seg2A
		addop 'pop',   [0x0F, 0x81], nil,  {:seg3A => [1, 3]}, :seg3A
		addop('popa',  [0x61]) { |o| o.props[:opsz] = 16 }
		addop('popad', [0x61]) { |o| o.props[:opsz] = 32 }
		addop('popf',  [0x9D]) { |o| o.props[:opsz] = 16 }
		addop('popfd', [0x9D]) { |o| o.props[:opsz] = 32 }
		addop 'push',  [0x06], nil,  {:seg2 => [0, 3]}, :seg2
		addop 'push',  [0x0F, 0x80], nil,  {:seg3A => [1, 3]}, :seg3A
		addop('pusha', [0x60]) { |o| o.props[:opsz] = 16 }
		addop('pushad',[0x60]) { |o| o.props[:opsz] = 32 }
		addop('pushf', [0x9C]) { |o| o.props[:opsz] = 16 }
		addop('pushfd',[0x9C]) { |o| o.props[:opsz] = 32 }
		addop_macro3 'rcl', 2
		addop_macro3 'rcr', 3
		addop 'rdmsr', [0x0F, 0x32]
		addop 'rdpmc', [0x0F, 0x33]
		addop 'rdtsc', [0x0F, 0x31], nil, {}, :random
		addop 'retf',  [0xCB], nil,  {}, :stopexec, :setip
		addop 'retf',  [0xCA], nil,  {}, :stopexec, :u16, :setip
		addop 'rsm',   [0x0F, 0xAA]
		addop 'sahf',  [0x9E]
		addop 'sgdt',  [0x0F, 0x01, 0<<3], :modrmA
		addop 'sidt',  [0x0F, 0x01, 1<<3], :modrmA
		addop 'sldt',  [0x0F, 0x00], 0
		addop 'smsw',  [0x0F, 0x01], 4
		addop 'stc',   [0xF9]
		addop 'std',   [0xFD]
		addop 'sti',   [0xFB]
		addop 'str',   [0x0F, 0x00], 1
		addop 'ud2',   [0x0F, 0x0B]
		addop 'verr',  [0x0F, 0x00], 4
		addop 'verw',  [0x0F, 0x00], 5
		addop 'wait',  [0x9B]
		addop 'wbinvd',[0x0F, 0x09]
		addop 'wrmsr', [0x0F, 0x30]
		addop 'xadd',  [0x0F, 0xC0], :mrmw
		addop 'xchg',  [0x90], :reg, {}, :reg_eax
		addop('xchg',  [0x90], :reg, {}, :reg_eax) { |o| o.args.reverse! }	# xchg eax, ebx == xchg ebx, eax)
		addop 'xchg',  [0x86], :mrmw
		addop('xchg',  [0x86], :mrmw) { |o| o.args.reverse! }
		addop 'xlat',  [0xD7]

# pfx:  addrsz = 0x67, lock = 0xf0, opsz = 0x66, repnz = 0xf2, rep/repz = 0xf3
#	cs/nojmp = 0x2E, ds/jmp = 0x3E, es = 0x26, fs = 0x64, gs = 0x65, ss = 0x36
		# undocumented opcodes
		# TODO put these in the right place (486/P6/...)
		addop 'aam',   [0xD4], nil,  {}, :u8
		addop 'aad',   [0xD5], nil,  {}, :u8
		addop 'setalc', [0xD6]
		addop 'salc', [0xD6]
		addop 'icebp', [0xF1]
		addop 'loadall',[0x0F, 0x07]
		addop 'ud2',   [0x0F, 0xB9]
		addop 'umov',  [0x0F, 0x10], :mrmw,{:d => [1, 1]}
	end

	def init_387_only
		init_cpu_constants

		addop 'f2xm1', [0xD9, 0xF0]
		addop 'fabs',  [0xD9, 0xE1]
		addop_macrofpu1 'fadd',  0
		addop 'faddp', [0xDE, 0xC0], :regfp
		addop('fbld',  [0xDF, 4<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 80 }
		addop('fbstp', [0xDF, 6<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 80 }
		addop 'fchs',  [0xD9, 0xE0], nil,  {}, :regfp0
		addop 'fnclex',      [0xDB, 0xE2]
		addop_macrofpu1 'fcom',  2
		addop_macrofpu1 'fcomp', 3
		addop 'fcompp',[0xDE, 0xD9]
		addop 'fcomip',[0xDF, 0xF0], :regfp
		addop 'fcos',  [0xD9, 0xFF], nil,  {}, :regfp0
		addop 'fdecstp', [0xD9, 0xF6]
		addop_macrofpu1 'fdiv', 6
		addop_macrofpu1 'fdivr', 7
		addop 'fdivp', [0xDE, 0xF8], :regfp
		addop 'fdivrp',[0xDE, 0xF0], :regfp
		addop 'ffree', [0xDD, 0xC0], nil,  {:regfp  => [1, 0]}, :regfp
		addop_macrofpu2 'fiadd', 0
		addop_macrofpu2 'fimul', 1
		addop_macrofpu2 'ficom', 2
		addop_macrofpu2 'ficomp',3
		addop_macrofpu2 'fisub', 4
		addop_macrofpu2 'fisubr',5
		addop_macrofpu2 'fidiv', 6
		addop_macrofpu2 'fidivr',7
		addop 'fincstp', [0xD9, 0xF7]
		addop 'fninit',      [0xDB, 0xE3]
		addop_macrofpu2 'fist', 2, 1
		addop_macrofpu3 'fild', 0
		addop_macrofpu3 'fistp',3
		addop('fld', [0xD9, 0<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 32 }
		addop('fld', [0xDD, 0<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 64 }
		addop('fld', [0xDB, 5<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 80 }
		addop 'fld', [0xD9, 0xC0], :regfp

		addop('fldcw',  [0xD9, 5<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop 'fldenv', [0xD9, 4<<3], :modrmA
		addop 'fld1',   [0xD9, 0xE8]
		addop 'fldl2t', [0xD9, 0xE9]
		addop 'fldl2e', [0xD9, 0xEA]
		addop 'fldpi',  [0xD9, 0xEB]
		addop 'fldlg2', [0xD9, 0xEC]
		addop 'fldln2', [0xD9, 0xED]
		addop 'fldz',   [0xD9, 0xEE]
		addop_macrofpu1 'fmul',  1
		addop 'fmulp',  [0xDE, 0xC8], :regfp
		addop 'fnop',   [0xD9, 0xD0]
		addop 'fpatan', [0xD9, 0xF3]
		addop 'fprem',  [0xD9, 0xF8]
		addop 'fprem1', [0xD9, 0xF5]
		addop 'fptan',  [0xD9, 0xF2]
		addop 'frndint',[0xD9, 0xFC]
		addop 'frstor', [0xDD, 4<<3], :modrmA
		addop 'fnsave', [0xDD, 6<<3], :modrmA
		addop('fnstcw', [0xD9, 7<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop 'fnstenv',[0xD9, 6<<3], :modrmA
		addop 'fnstsw', [0xDF, 0xE0]
		addop('fnstsw', [0xDD, 7<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop 'fscale', [0xD9, 0xFD]
		addop 'fsin',   [0xD9, 0xFE]
		addop 'fsincos',[0xD9, 0xFB]
		addop 'fsqrt',  [0xD9, 0xFA]
		addop('fst',  [0xD9, 2<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 32 }
		addop('fst',  [0xDD, 2<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 64 }
		addop 'fst',  [0xD9, 0xD0], :regfp
		addop('fstp', [0xD9, 3<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 32 }
		addop('fstp', [0xDD, 3<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 64 }
		addop('fstp', [0xDB, 7<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 80 }
		addop 'fstp', [0xDD, 0xD8], :regfp
		addop_macrofpu1 'fsub',  4
		addop 'fsubp',  [0xDE, 0xE8], :regfp
		addop_macrofpu1 'fsubp', 5
		addop 'fsubrp', [0xDE, 0xE0], :regfp
		addop 'ftst',   [0xD9, 0xE4]
		addop 'fucom',  [0xDD, 0xE0], :regfp
		addop 'fucomp', [0xDD, 0xE8], :regfp
		addop 'fucompp',[0xDA, 0xE9]
		addop 'fucomi', [0xDB, 0xE8], :regfp
		addop 'fxam',   [0xD9, 0xE5]
		addop 'fxch',   [0xD9, 0xC8], :regfp
		addop 'fxtract',[0xD9, 0xF4]
		addop 'fyl2x',  [0xD9, 0xF1]
		addop 'fyl2xp1',[0xD9, 0xF9]
		# fwait prefix
		addop 'fclex',  [0x9B, 0xDB, 0xE2]
		addop 'finit',  [0x9B, 0xDB, 0xE3]
		addop 'fsave',  [0x9B, 0xDD, 6<<3], :modrmA
		addop('fstcw',  [0x9B, 0xD9, 7<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop 'fstenv', [0x9B, 0xD9, 6<<3], :modrmA
		addop 'fstsw',  [0x9B, 0xDF, 0xE0]
		addop('fstsw',  [0x9B, 0xDD, 7<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop 'fwait',  [0x9B]
	end

	def init_486_only
		init_cpu_constants
		# TODO add new segments (fs/gs) ?
	end

	def init_pentium_only
		init_cpu_constants

		addop 'cmpxchg8b', [0x0F, 0xC7], 1
		# lock cmpxchg8b eax
		#addop 'f00fbug', [0xF0, 0x0F, 0xC7, 0xC8]

		# mmx
		addop 'emms',  [0x0F, 0x77]
		addop('movd',  [0x0F, 0x6E], :mrmmmx, {:d => [1, 4]}) { |o| o.args[o.args.index(:modrmmmx)] = :modrm }
		addop('movq',  [0x0F, 0x6F], :mrmmmx, {:d => [1, 4]}) { |o| o.args.reverse! }	# TODO check ohter mrmmmx
		addop 'packssdw', [0x0F, 0x6B], :mrmmmx
		addop 'packsswb', [0x0F, 0x63], :mrmmmx
		addop 'packuswb', [0x0F, 0x67], :mrmmmx
		addop_macrogg 0..2, 'padd',  [0x0F, 0xFC], :mrmmmx
		addop_macrogg 0..1, 'padds', [0x0F, 0xEC], :mrmmmx
		addop_macrogg 0..1, 'paddus',[0x0F, 0xDC], :mrmmmx
		addop 'pand',  [0x0F, 0xDB], :mrmmmx
		addop 'pandn', [0x0F, 0xDF], :mrmmmx
		addop_macrogg 0..2, 'pcmpeq',[0x0F, 0x74], :mrmmmx
		addop_macrogg 0..2, 'pcmpgt',[0x0F, 0x64], :mrmmmx
		addop 'pmaddwd', [0x0F, 0xF5], :mrmmmx
		addop 'pmulhuw', [0x0F, 0xE4], :mrmmmx
		addop 'pmulhw',[0x0F, 0xE5], :mrmmmx
		addop 'pmullw',[0x0F, 0xD5], :mrmmmx
		addop 'por',   [0x0F, 0xEB], :mrmmmx
		addop_macrommx 1..3, 'psll', 3
		addop_macrommx 1..2, 'psra', 2
		addop_macrommx 1..3, 'psrl', 1
		addop_macrogg 0..2, 'psub',  [0x0F, 0xF8], :mrmmmx
		addop_macrogg 0..1, 'psubs', [0x0F, 0xE8], :mrmmmx
		addop_macrogg 0..1, 'psubus',[0x0F, 0xD8], :mrmmmx
		addop_macrogg 1..3, 'punchkh', [0x0F, 0x68], :mrmmmx
		addop_macrogg 1..3, 'punpckl', [0x0F, 0x60], :mrmmmx
		addop 'pxor',  [0x0F, 0xEF], :mrmmmx
	end

	def init_p6_only
		addop_macrotttn 'cmov', [0x0F, 0x40], :mrm

		%w{b e be u}.each_with_index { |tt, i|
			addop 'fcmov' +tt, [0xDA, 0xC0 | (i << 3)], :regfp
			addop 'fcmovn'+tt, [0xDB, 0xC0 | (i << 3)], :regfp
		}
		addop 'fcomi', [0xDB, 0xF0], :regfp
		addop('fxrstor', [0x0F, 0xAE, 1<<3], :modrmA) { |o| o.props[:argsz] = 512*8 }
		addop('fxsave',  [0x0F, 0xAE, 0<<3], :modrmA) { |o| o.props[:argsz] = 512*8 }
		addop 'sysenter',[0x0F, 0x34]
		addop 'sysexit', [0x0F, 0x35]
	end

	def init_3dnow_only
		init_cpu_constants

		[['pavgusb', 0xBF], ['pfadd', 0x9E], ['pfsub', 0x9A],
		 ['pfsubr', 0xAA], ['pfacc', 0xAE], ['pfcmpge', 0x90],
		 ['pfcmpgt', 0xA0], ['fpcmpeq', 0xB0], ['pfmin', 0x94],
		 ['pfmax', 0xA4], ['pi2fd', 0x0D], ['pf2id', 0x1D],
		 ['pfrcp', 0x96], ['pfrsqrt', 0x97], ['pfmul', 0xB4],
		 ['pfrcpit1', 0xA6], ['pfrsqit1', 0xA7], ['pfrcpit2', 0xB6],
		 ['pmulhrw', 0xB7]].each { |str, bin|
			addop str, [0x0F, 0x0F, bin], :mrmmmx
		}
		# 3dnow prefix fallback
		addop '3dnow', [0x0F, 0x0F], :mrmmmx, {}, :u8

		addop 'femms', [0x0F, 0x0E]
		addop 'prefetch',  [0x0F, 0x0D, 0<<3], :modrmA
		addop 'prefetchw', [0x0F, 0x0D, 1<<3], :modrmA
	end

	def init_sse_only
		init_cpu_constants

		addop_macrossps 'addps', [0x0F, 0xA8], :mrmxmm
		addop 'andnps',  [0x0F, 0xAA], :mrmxmm
		addop 'andps',   [0x0F, 0xA4], :mrmxmm
		addop_macrossps 'cmpps', [0x0F, 0xC2], :mrmxmm
		addop 'comiss',  [0x0F, 0x2F], :mrmxmm

		[['pi2ps', 0x2A], ['ps2pi', 0x2D], ['tps2pi', 0x2C]].each { |str, bin|
			addop('cvt' << str, [0x0F, bin], :mrmxmm) { |o| o.args[o.args.index(:modrmxmm)] = :modrmmmx }
			addop('cvt' << str.tr('p', 's'), [0x0F, bin], :mrmxmm) { |o| o.args[o.args.index(:modrmxmm)] = :modrm ; o.props[:needpfx] = 0xF3 }
		}

		addop_macrossps 'divps', [0x0F, 0x5E], :mrmxmm
		addop 'ldmxcsr', [0x0F, 0xAE, 2<<3], :modrmA
		addop_macrossps 'maxps', [0x0F, 0x5F], :mrmxmm
		addop_macrossps 'minps', [0x0F, 0x5D], :mrmxmm
		addop 'movaps',  [0x0F, 0x28], :mrmxmm, {:d => [1, 0]}

		# movhlps(reg, reg){nomem} == movlps(reg, mrm){no restriction}...
		addop 'movhlps', [0x0F, 0x12], :mrmxmm, {:d => [1, 0]}
		addop 'movlps',  [0x0F, 0x12], :mrmxmm, {:d => [1, 0]}
		addop 'movlhps', [0x0F, 0x16], :mrmxmm, {:d => [1, 0]}
		addop 'movhps',  [0x0F, 0x16], :mrmxmm, {:d => [1, 0]}

		addop 'movmskps',[0x0F, 0x50, 0xC0], nil, {:reg => [2, 3], :regxmm => [2, 0]}, :regxmm, :reg
		addop('movss',   [0x0F, 0x10], :mrmxmm, {:d => [1, 0]}) { |o| o.props[:needpfx] = 0xF3 }
		addop 'movups',  [0x0F, 0x10], :mrmxmm, {:d => [1, 0]}
		addop_macrossps 'mulps', [0x0F, 0x59], :mrmxmm
		addop 'orps',    [0x0F, 0x56], :mrmxmm
		addop_macrossps 'rcpps',  [0x0F, 0x53], :mrmxmm
		addop_macrossps 'rsqrtps',[0x0F, 0x52], :mrmxmm
		addop 'shufps',  [0x0F, 0xC6], :mrmxmm, {}, :u8
		addop_macrossps 'sqrtps', [0x0F, 0x51], :mrmxmm
		addop 'stmxcsr', [0x0F, 0xAE, 3<<3], :modrmA
		addop_macrossps 'subps', [0x0F, 0x5C], :mrmxmm
		addop 'ucomiss', [0x0F, 0x2E], :mrmxmm
		addop 'unpckhps',[0x0F, 0x15], :mrmxmm
		addop 'unpcklps',[0x0F, 0x14], :mrmxmm
		addop 'xorps',   [0x0F, 0x57], :mrmxmm

		# start of integer instruction (accept opsz override prefix to access xmm)
		addop('pavgb',   [0x0F, 0xE0], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('pavgw',   [0x0F, 0xE3], :mrmmmx) { |o| o.props[:xmmx] = true }
# TODO		addop('pextrw',  [0x0F, 0xC5], :mrmmmx) { |o| o.fields[:reg] = o.fields.delete(:regmmx) } { |o| o.props[:xmmx] = true ; o.args << :u8 }
#		addop('pinsrw',  [0x0F, 0xC4], :mrmmmx) { |o| o.fields[:reg] = o.fields.delete(:regmmx) } { |o| o.props[:xmmx] = true ; o.args << :u8 }
		addop('pmaxsw',  [0x0F, 0xEE], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('pmaxub',  [0x0F, 0xDE], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('pminsw',  [0x0F, 0xEA], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('pminub',  [0x0F, 0xDA], :mrmmmx) { |o| o.props[:xmmx] = true }
#		addop('pmovmskb',[0x0F, 0xD4], :mrmmmx) { |o| o.fields[:reg] = o.fields.delete(:regmmx) } ) { |o| o.props[:xmmx] = true } # no mem ref in the mrm
		addop('pmulhuw', [0x0F, 0xE4], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('psadbw',  [0x0F, 0xF6], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop('pshufw',  [0x0F, 0x70], :mrmmmx) { |o| o.props[:xmmx] = true ; o.args << :u8 }
		addop('maskmovq',[0x0F, 0xF7], :mrmmmx) { |o| o.props[:xmmx] = true } # nomem
		addop('movntq',  [0x0F, 0xE7], :mrmmmx) { |o| o.props[:xmmx] = true }
		addop 'movntps', [0x0F, 0x2B], :mrmxmm
		addop 'prefetcht0', [0x0F, 0x18, 1<<3], :modrmA
		addop 'prefetcht1', [0x0F, 0x18, 2<<3], :modrmA
		addop 'prefetcht2', [0x0F, 0x18, 3<<3], :modrmA
		addop 'prefetchnta',[0x0F, 0x18, 0<<3], :modrmA
		addop 'sfence',  [0x0F, 0xAE, 0xF8]
	end

	# XXX must be done after init_sse (patches :regmmx opcodes)
	# TODO complete the list
	def init_sse2_only
		init_cpu_constants

		@opcode_list.each { |o| o.props[:xmmx] = true if o.args.include? :regmmx and o.args.include? :modrmmmx }

		# TODO <..blabla...integer...blabla..>

		# nomem
		addop 'clflush', [0x0F, 0xAE, 7<<3], :modrmA
		addop('maskmovdqu', [0x0F, 0xF7], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('movntpd', [0x0F, 0x2B], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('movntdq', [0x0F, 0xE7], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop 'movnti',  [0x0F, 0xC3], :mrm
		addop('pause',   [0x90]) { |o| o.props[:needpfx] = 0xF3 }
		addop 'lfence',  [0x0F, 0xAE, 0xE8]
		addop 'mfence',  [0x0F, 0xAE, 0xF0]
	end

	def init_sse3_only
		init_cpu_constants

		addop('addsubpd', [0x0F, 0xD0], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('addsubps', [0x0F, 0xD0], :mrmxmm) { |o| o.props[:needpfx] = 0xF2 }
		addop('haddpd',   [0x0F, 0x7C], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('haddps',   [0x0F, 0x7C], :mrmxmm) { |o| o.props[:needpfx] = 0xF2 }
		addop('hsubpd',   [0x0F, 0x7D], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('hsubps',   [0x0F, 0x7D], :mrmxmm) { |o| o.props[:needpfx] = 0xF2 }

		addop 'monitor',  [0x0F, 0x01, 0xC8]
		addop 'mwait',    [0x0F, 0x01, 0xC9]

		addop('fisttp',   [0xDF, 1<<3], :modrmA) { |o| o.props[:argsz] = 16 }
		addop('fisttp',   [0xDB, 1<<3], :modrmA) { |o| o.props[:argsz] = 32 }
		addop('fisttp',   [0xDD, 1<<3], :modrmA) { |o| o.props[:argsz] = 64 }
		addop('lddqu',    [0x0F, 0xF0], :mrmxmm) { |o| o.args[o.args.index(:modrmxmm)] = :modrmA ; o.props[:needpfx] = 0xF2 }
		addop('movddup',  [0x0F, 0x12], :mrmxmm) { |o| o.props[:needpfx] = 0xF2 }
		addop('movshdup', [0x0F, 0x16], :mrmxmm) { |o| o.props[:needpfx] = 0xF3 }
		addop('movsldup', [0x0F, 0x12], :mrmxmm) { |o| o.props[:needpfx] = 0xF3 }
	end

	def init_vmx_only
		init_cpu_constants

		addop 'vmcall',   [0x0F, 0x01, 0xC1]
		addop 'vmlaunch', [0x0F, 0x01, 0xC2]
		addop 'vmresume', [0x0F, 0x01, 0xC3]
		addop 'vmxoff',   [0x0F, 0x01, 0xC4]
		addop 'vmread',   [0x0F, 0x78], :mrm
		addop 'vmwrite',  [0x0F, 0x79], :mrm
		addop('vmclear',  [0x0F, 0xC7, 6<<3], :modrmA) { |o| o.props[:argsz] = 64 ; o.props[:needpfx] = 0x66 }
		addop('vmxon',    [0x0F, 0xC7, 6<<3], :modrmA) { |o| o.props[:argsz] = 64 ; o.props[:needpfx] = 0xF3 }
		addop('vmptrld',  [0x0F, 0xC7, 6<<3], :modrmA) { |o| o.props[:argsz] = 64 }
		addop('vmptrrst', [0x0F, 0xC7, 7<<3], :modrmA) { |o| o.props[:argsz] = 64 }
		addop('invept',   [0x0F, 0x38, 0x80], :mrmA) { |o| o.props[:needpfx] = 0x66 }
		addop('invvpid',  [0x0F, 0x38, 0x81], :mrmA) { |o| o.props[:needpfx] = 0x66 }

		addop 'getsec',   [0x0F, 0x37]

		addop('movbe',    [0x0F, 0x38, 0xF0], :mrm, { :d => [2, 0] }) { |o| o.args.reverse! }
		addop 'xgetbv', [0x0F, 0x01, 0xD0]
		addop 'xsetbv', [0x0F, 0x01, 0xD1]
		addop 'xrstor', [0x0F, 0xAE, 5<<3], :modrmA
		addop 'xsave',  [0x0F, 0xAE, 4<<3], :modrmA
		addop 'nop', [0x0F, 0x1F], 0	# which family does this belong to ?
	end

	def init_sse42_only
		init_cpu_constants

		addop('crc32', [0x0F, 0x38, 0xF0], :mrmw) { |o| o.props[:needpfx] = 0xF2 }
		addop('pcmpestrm', [0x0F, 0x3A, 0x60], :mrmxmm, {}, :i8) { |o| o.props[:needpfx] = 0x66 }
		addop('pcmpestri', [0x0F, 0x3A, 0x61], :mrmxmm, {}, :i8) { |o| o.props[:needpfx] = 0x66 }
		addop('pcmpistrm', [0x0F, 0x3A, 0x62], :mrmxmm, {}, :i8) { |o| o.props[:needpfx] = 0x66 }
		addop('pcmpistri', [0x0F, 0x3A, 0x63], :mrmxmm, {}, :i8) { |o| o.props[:needpfx] = 0x66 }
		addop('pcmpgtq', [0x0F, 0x38, 0x37], :mrmxmm) { |o| o.props[:needpfx] = 0x66 }
		addop('popcnt',  [0x0F, 0xB8], :mrmxmm) { |o| o.props[:needpfx] = 0xF3 }
	end


	#
	# CPU family dependencies
	#

	def init_386_common
		init_386_common_only
	end

	def init_386
		init_386_common
		init_386_only
	end

	def init_387
		init_387_only
	end

	def init_486
		init_386
		init_387
		init_486_only
	end

	def init_pentium
		init_486
		init_pentium_only
	end

	def init_3dnow
		init_pentium
		init_3dnow_only
	end

	def init_p6
		init_pentium
		init_p6_only
	end

	def init_sse
		init_p6
		init_sse_only
	end

	def init_sse2
		init_sse
		init_sse2_only
	end

	def init_sse3
		init_sse2
		init_sse3_only
	end

	def init_vmx
		init_sse3
		init_vmx_only
	end
	
	def init_all
		init_vmx
		init_sse42_only
		init_3dnow_only
	end

	alias init_latest init_all


	#
	# addop_* macros
	#

	def addop_macro1(name, num, immtype=:i)
		addop name, [(num << 3) | 4], nil, {:w => [0, 0]}, :reg_eax, immtype
		addop name, [num << 3], :mrmw, {:d => [0, 1]}
		addop name, [0x80], num, {:w => [0, 0], :s => [0, 1]}, immtype
	end
	def addop_macro2(name, num)
		addop name, [0x0F, 0xBA], (4 | num), {}, :u8
		addop(name, [0x0F, 0xA3 | (num << 3)], :mrm) { |op| op.args.reverse! }
	end
	def addop_macro3(name, num)
		addop name, [0xD0], num, {:w => [0, 0]}, :imm_val1
		addop name, [0xD2], num, {:w => [0, 0]}, :reg_cl
		addop name, [0xC0], num, {:w => [0, 0]}, :u8
	end

	def addop_macrotttn(name, bin, hint, fields = {}, *props, &blk)
		[%w{o},     %w{no},    %w{b nae}, %w{nb ae},
		 %w{z e},   %w{nz ne}, %w{be na}, %w{nbe a},
		 %w{s},     %w{ns},    %w{p pe},  %w{np po},
		 %w{l nge}, %w{nl ge}, %w{le ng}, %w{nle g}].each_with_index { |e, i|
			b = bin.dup
			if b[0] == 0x0F
				b[1] |= i
			else
				b[0] |= i
			end

			e.each { |k| addop(name + k, b.dup, hint, fields.dup, *props, &blk) }
		}
	end

	def addop_macrostr(name, bin, type)
		# addop(name, bin.dup, {:w => [0, 0]}) { |o| o.props[type] = true }     # TODO allow segment override
		addop(name+'b', bin) { |o| o.props[:opsz] = 16 ; o.props[type] = true }
		addop(name+'b', bin) { |o| o.props[:opsz] = 32 ; o.props[type] = true }
		bin = bin.dup
		bin[0] |= 1
		addop(name+'w', bin) { |o| o.props[:opsz] = 16 ; o.props[type] = true }
		addop(name+'d', bin) { |o| o.props[:opsz] = 32 ; o.props[type] = true }
	end

	def addop_macrofpu1(name, n)
		addop(name, [0xD8, n<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 32 }
		addop(name, [0xDC, n<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 64 }
		addop name, [0xD8, 0xC0|(n<<3)], :regfp, {:d => [0, 2]}
	end
	def addop_macrofpu2(name, n, n2=0)
		addop(name, [0xDE|n2, n<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 16 }
		addop(name, [0xDA|n2, n<<3], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 32 }
	end
	def addop_macrofpu3(name, n)
		addop_macrofpu2 name, n, 1
		addop(name, [0xDF, 0x28|(n<<3)], :modrmA, {}, :regfp0) { |o| o.props[:argsz] = 64 }
	end

	def addop_macrogg(ggrng, name, bin, *args, &blk)
		ggrng.each { |gg|
			bindup = bin.dup
			bindup[1] |= gg
			sfx = %w(b w d q)[gg]
			addop name+sfx, bindup, *args, &blk
		}
	end

	def addop_macrommx(ggrng, name, val)
		addop_macrogg ggrng, name, [0x0F, 0xC0 | (val << 4)], :mrmmmx
		addop_macrogg ggrng, name, [0x0F, 0x70, 0xC0 | (val << 4)], nil, {:regmmx => [2, 0]}, :u8
	end

	def addop_macrossps(name, bin, hint)
		# don't allow fields argument, as this will be modified by addop (.dup it if needed)
		addop name, bin, hint
		addop(name.tr('p', 's'), bin, hint) { |o| o.props[:needpfx] = 0xF3 }
	end

	# helper function: creates a new Opcode based on the arguments, eventually
	# yields it for further customisation, and append it to the instruction set
	# is responsible of the creation of disambiguating opcodes if necessary (:s flag hardcoding)
	def addop(name, bin, hint=nil, fields={}, *argprops)
		op = Opcode.new name
		op.bin = bin
		op.fields.replace fields

		case hint
		when nil

		when :mrm, :mrmw, :mrmA
			h = (hint == :mrmA ? :modrmA : :modrm)
			op.fields[:reg]   = [bin.length, 3]
			op.fields[h] = [bin.length, 0]
			op.fields[:w]     = [bin.length - 1, 0] if hint == :mrmw
			argprops.unshift :reg, h
			op.bin << 0
		when :reg
			op.fields[:reg] = [bin.length-1, 0]
			argprops.unshift :reg
		when :regfp
			op.fields[:regfp] = [bin.length-1, 0]
			argprops.unshift :regfp, :regfp0
		when :modrmA
			op.fields[:modrmA] = [bin.length-1, 0]
			argprops << :modrmA

		when Integer		# mod/m, reg == opcode extension = hint
			op.fields[:modrm] = [bin.length, 0]
			op.bin << (hint << 3)
			argprops.unshift :modrm

		when :mrmmmx
			op.fields[:regmmx] = [bin.length, 3]
			op.fields[:modrm] = [bin.length, 0]
			bin << 0
			argprops.unshift :regmmx, :modrmmmx
		when :mrmxmm
			op.fields[:regxmm] = [bin.length, 3]
			op.fields[:modrm] = [bin.length, 0]
			bin << 0
			argprops.unshift :regxmm, :modrmxmm
		else
			raise SyntaxError, "invalid hint #{hint.inspect} for #{name}"
		end

		if argprops.index(:u)
			argprops << :unsigned_imm
			argprops[argprops.index(:u)] = :i
		end

		(argprops & @valid_props).each { |p| op.props[p] = true }
		argprops -= @valid_props

		op.args.concat(argprops & @valid_args)
		argprops -= @valid_args

		raise "Invalid opcode definition: #{name}: unknown #{argprops.inspect}" unless argprops.empty?

		yield op if block_given?

		argprops = (op.props.keys - @valid_props) + (op.args - @valid_args) + (op.fields.keys - @fields_mask.keys)
		raise "Invalid opcode customisation: #{name}: #{argprops.inspect}" unless argprops.empty?

		addop_post(op)
	end

	# this recursive method is in charge of Opcode duplication (eg to hardcode some flag)
	def addop_post(op)
		dupe = lambda { |o|
			dop = Opcode.new o.name.dup
			dop.bin, dop.fields, dop.props, dop.args = o.bin.dup, o.fields.dup, o.props.dup, o.args.dup
			dop
		}
		if df = op.fields.delete(:d)
			# hardcode the bit
			dop = dupe[op]
			dop.args.reverse!
			addop_post dop

			op.bin[df[0]] |= 1 << df[1]
			addop_post op

			return
		elsif wf = op.fields.delete(:w)
			# hardcode the bit
			dop = dupe[op]
			dop.props[:argsz] = 8
			addop_post dop

			op.bin[wf[0]] |= 1 << wf[1]
			addop_post op

			return
		elsif sf = op.fields.delete(:s)
			# add explicit choice versions, with lower precedence (so that disassembling will return the general version)
			# eg "jmp", "jmp.i8", "jmp.i"
			# also hardcode the bit
			op32 = op
			addop_post op32

			op8 = dupe[op]
			op8.bin[sf[0]] |= 1 << sf[1]
			op8.args.map! { |arg| arg == :i ? :i8 : arg }
			addop_post op8

			op32 = dupe[op32]
			op32.name << '.i'
			addop_post op32

			op8 = dupe[op8]
			op8.name << '.i8'
			addop_post op8

			return
		elsif op.args.include? :regfp0
			dop = dupe[op]
			dop.args.delete :regfp0
			addop_post dop
		end

		@opcode_list << op

		if op.args == [:i] or op.args == [:farptr] or op.name[0, 3] == 'ret'
			# define opsz-override version for ambiguous opcodes
			op16 = dupe[op]
			op16.name << '.i16'
			op16.props[:opsz] = 16
			@opcode_list << op16
			op32 = dupe[op]
			op32.name << '.i32'
			op32.props[:opsz] = 32
			@opcode_list << op32
		elsif op.props[:strop] or op.props[:stropz]
			# define adsz-override version for ambiguous opcodes (TODO allow movsd edi / movsd di)
			op16 = dupe[op]
			op16.name << '.a16'
			op16.props[:adsz] = 16
			@opcode_list << op16
			op32 = dupe[op]
			op32.name << '.a32'
			op32.props[:adsz] = 32
			@opcode_list << op32
		end
	end
end
end
