; flat assembler core
; Copyright (c) 1999-2006, Tomasz Grysztar.
; All rights reserved.

simple_instruction_except64:
	cmp	[code_type],64
	je	illegal_instruction
simple_instruction:
	stos	byte [edi]
	jmp	instruction_assembled
simple_instruction_only64:
	cmp	[code_type],64
	jne	illegal_instruction
	jmp	simple_instruction
simple_instruction_16bit_except64:
	cmp	[code_type],64
	je	illegal_instruction
simple_instruction_16bit:
	cmp	[code_type],16
	jne	size_prefix
	stos	byte [edi]
	jmp	instruction_assembled
      size_prefix:
	mov	ah,al
	mov	al,66h
	stos	word [edi]
	jmp	instruction_assembled
simple_instruction_32bit_except64:
	cmp	[code_type],64
	je	illegal_instruction
simple_instruction_32bit:
	cmp	[code_type],16
	je	size_prefix
	stos	byte [edi]
	jmp	instruction_assembled
simple_instruction_64bit:
	cmp	[code_type],64
	jne	illegal_instruction
	mov	ah,al
	mov	al,48h
	stos	word [edi]
	jmp	instruction_assembled
simple_extended_instruction_64bit:
	cmp	[code_type],64
	jne	illegal_instruction
	mov	al,48h
	stos	byte [edi]
simple_extended_instruction:
	mov	ah,al
	mov	al,0Fh
	stos	word [edi]
	jmp	instruction_assembled
prefix_instruction:
	stos	byte [edi]
	or	[prefixed_instruction],-1
	jmp	continue_line
segment_prefix:
	mov	ah,al
	shr	ah,4
	cmp	ah,6
	jne	illegal_instruction
	and	al,1111b
	mov	[segment_register],al
	call	store_segment_prefix
	or	[prefixed_instruction],-1
	jmp	continue_line
int_instruction:
	lods	byte [esi]
	call	get_size_operator
	cmp	ah,1
	ja	invalid_operand_size
	cmp	al,'('
	jne	invalid_operand
	call	get_byte_value
	mov	ah,al
	mov	al,0CDh
	stos	word [edi]
	jmp	instruction_assembled
iret_instruction:
	cmp	[code_type],64
	jne	simple_instruction
	call	operand_64bit
	jmp	simple_instruction
aa_instruction:
	cmp	[code_type],64
	je	illegal_instruction
	push	eax
	mov	bl,10
	cmp	byte [esi],'('
	jne	aa_store
	inc	esi
	xor	al,al
	xchg	al,[operand_size]
	cmp	al,1
	ja	invalid_operand_size
	call	get_byte_value
	mov	bl,al
      aa_store:
	cmp	[operand_size],0
	jne	invalid_operand
	pop	eax
	mov	ah,bl
	stos	word [edi]
	jmp	instruction_assembled

basic_instruction:
	mov	[base_code],al
	lods	byte [esi]
	call	get_size_operator
	cmp	al,10h
	je	basic_reg
	cmp	al,'['
	jne	invalid_operand
      basic_mem:
	call	get_address
	push	edx ebx ecx
	lods	byte [esi]
	cmp	al,','
	jne	invalid_operand
	lods	byte [esi]
	call	get_size_operator
	cmp	al,'('
	je	basic_mem_imm
	cmp	al,10h
	jne	invalid_operand
      basic_mem_reg:
	lods	byte [esi]
	call	convert_register
	mov	[postbyte_register],al
	pop	ecx ebx edx
	mov	al,ah
	cmp	al,1
	je	basic_mem_reg_8bit
	call	operand_autodetect
	inc	[base_code]
      basic_mem_reg_8bit:
	call	store_instruction
	jmp	instruction_assembled
      basic_mem_imm:
	mov	al,[operand_size]
	cmp	al,1
	je	basic_mem_imm_8bit
	cmp	al,2
	je	basic_mem_imm_16bit
	cmp	al,4
	je	basic_mem_imm_32bit
	cmp	al,8
	je	basic_mem_imm_64bit
	or	al,al
	jnz	invalid_operand_size
	cmp	[error_line],0
	jne	basic_mem_imm_8bit
	mov	eax,[current_line]
	mov	[error_line],eax
	mov	[error],operand_size_not_specified
      basic_mem_imm_8bit:
	call	get_byte_value
	mov	byte [value],al
	mov	al,[base_code]
	shr	al,3
	mov	[postbyte_register],al
	pop	ecx ebx edx
	mov	[base_code],80h
	call	store_instruction_with_imm8
	jmp	instruction_assembled
      basic_mem_imm_16bit:
	call	operand_16bit
	call	get_word_value
	mov	word [value],ax
	mov	al,[base_code]
	shr	al,3
	mov	[postbyte_register],al
	pop	ecx ebx edx
	cmp	[value_type],0
	jne	basic_mem_imm_16bit_store
	cmp	[size_declared],0
	jne	basic_mem_imm_16bit_store
	cmp	word [value],80h
	jb	basic_mem_simm_8bit
	cmp	word [value],-80h
	jae	basic_mem_simm_8bit
      basic_mem_imm_16bit_store:
	mov	[base_code],81h
	call	store_instruction_with_imm16
	jmp	instruction_assembled
      basic_mem_simm_8bit:
	mov	[base_code],83h
	call	store_instruction_with_imm8
	jmp	instruction_assembled
      basic_mem_imm_32bit:
	call	operand_32bit
	call	get_dword_value
      basic_mem_imm_32bit_ok:
	mov	dword [value],eax
	mov	al,[base_code]
	shr	al,3
	mov	[postbyte_register],al
	pop	ecx ebx edx
	cmp	[value_type],0
	jne	basic_mem_imm_32bit_store
	cmp	[size_declared],0
	jne	basic_mem_imm_32bit_store
	cmp	dword [value],80h
	jb	basic_mem_simm_8bit
	cmp	dword [value],-80h
	jae	basic_mem_simm_8bit
      basic_mem_imm_32bit_store:
	mov	[base_code],81h
	call	store_instruction_with_imm32
	jmp	instruction_assembled
      basic_mem_imm_64bit:
	cmp	[size_declared],0
	jne	long_immediate_not_encodable
	call	operand_64bit
	call	get_simm32
	cmp	[value_type],4
	jae	long_immediate_not_encodable
	jmp	basic_mem_imm_32bit_ok
      get_simm32:
	call	get_qword_value
	mov	ecx,edx
	cdq
	cmp	ecx,edx
	jne	value_out_of_range
	cmp	[value_type],4
	jne	get_simm32_ok
	mov	[value_type],2
      get_simm32_ok:
	ret
      basic_reg:
	lods	byte [esi]
	call	convert_register
	mov	[postbyte_register],al
	lods	byte [esi]
	cmp	al,','
	jne	invalid_operand
	lods	byte [esi]
	call	get_size_operator
	cmp	al,10h
	je	basic_reg_reg
	cmp	al,'('
	je	basic_reg_imm
	cmp	al,'['
	jne	invalid_operand
      basic_reg_mem:
	call	get_address
	mov	al,[operand_size]
	cmp	al,1
	je	basic_reg_mem_8bit
	call	operand_autodetect
	add	[base_code],3
	call	store_instruction
	jmp	instruction_assembled
      basic_reg_mem_8bit:
	add	[base_code],2
	call	store_instruction
	jmp	instruction_assembled
      basic_reg_reg:
	lods	byte [esi]
	call	convert_register
	mov	bl,[postbyte_register]
	mov	[postbyte_register],al
	mov	al,ah
	cmp	al,1
	je	basic_reg_reg_8bit
	call	operand_autodetect
	inc	[base_code]
      basic_reg_reg_8bit:
	call	store_nomem_instruction
	jmp	instruction_assembled
      basic_reg_imm:
	mov	al,[operand_size]
	cmp	al,1
	je	basic_reg_imm_8bit
	cmp	al,2
	je	basic_reg_imm_16bit
	cmp	al,4
	je	basic_reg_imm_32bit
	cmp	al,8
	je	basic_reg_imm_64bit
	or	al,al
	jnz	invalid_operand_size
	cmp	[error_line],0
	jne	basic_reg_imm_32bit
	mov	eax,[current_line]
	mov	[error_line],eax
	mov	[error],operand_size_not_specified
	jmp	basic_reg_imm_32bit
      basic_reg_imm_8bit:
	call	get_byte_value
	mov	dl,al
	mov	bl,[base_code]
	shr	bl,3
	xchg	bl,[postbyte_register]
	or	bl,bl
	jz	basic_al_imm
	mov	[base_code],80h
	call	store_nomem_instruction
	mov	al,dl
	stos	byte [edi]
	jmp	instruction_assembled
      basic_al_imm:
	mov	al,[base_code]
	add	al,4
	stos	byte [edi]
	mov	al,dl
	stos	byte [edi]
	jmp	instruction_assembled
      basic_reg_imm_16bit:
	call	operand_16bit
	call	get_word_value
	mov	dx,ax
	mov	bl,[base_code]
	shr	bl,3
	xchg	bl,[postbyte_register]
	cmp	[value_type],0
	jne	basic_reg_imm_16bit_store
	cmp	[size_declared],0
	jne	basic_reg_imm_16bit_store
	cmp	dx,80h
	jb	basic_reg_simm_8bit
	cmp	dx,-80h
	jae	basic_reg_simm_8bit
      basic_reg_imm_16bit_store:
	or	bl,bl
	jz	basic_ax_imm
	mov	[base_code],81h
	call	store_nomem_instruction
	mov	ax,dx
	call	mark_relocation
	stos	word [edi]
	jmp	instruction_assembled
      basic_reg_simm_8bit:
	mov	[base_code],83h
	call	store_nomem_instruction
	mov	al,dl
	stos	byte [edi]
	jmp	instruction_assembled
      basic_ax_imm:
	add	[base_code],5
	call	store_instruction_code
	mov	ax,dx
	call	mark_relocation
	stos	word [edi]
	jmp	instruction_assembled
      basic_reg_imm_32bit:
	call	operand_32bit
	call	get_dword_value
      basic_reg_imm_32bit_ok:
	mov	edx,eax
	mov	bl,[base_code]
	shr	bl,3
	xchg	bl,[postbyte_register]
	cmp	[value_type],0
	jne	basic_reg_imm_32bit_store
	cmp	[size_declared],0
	jne	basic_reg_imm_32bit_store
	cmp	edx,80h
	jb	basic_reg_simm_8bit
	cmp	edx,-80h
	jae	basic_reg_simm_8bit
      basic_reg_imm_32bit_store:
	or	bl,bl
	jz	basic_eax_imm
	mov	[base_code],81h
	call	store_nomem_instruction
	mov	eax,edx
	call	mark_relocation
	stos	dword [edi]
	jmp	instruction_assembled
      basic_eax_imm:
	add	[base_code],5
	call	store_instruction_code
	mov	eax,edx
	call	mark_relocation
	stos	dword [edi]
	jmp	instruction_assembled
      basic_reg_imm_64bit:
	cmp	[size_declared],0
	jne	long_immediate_not_encodable
	call	operand_64bit
	call	get_simm32
	cmp	[value_type],4
	jae	long_immediate_not_encodable
	jmp	basic_reg_imm_32bit_ok
single_operand_instruction:
	mov	[base_code],0F6h
	mov	[postbyte_register],al
	lods	byte [esi]
	call	get_size_operator
	cmp	al,10h
	je	single_reg
	cmp	al,'['
	jne	invalid_operand
      single_mem:
	call	get_address
	mov	al,[operand_size]
	cmp	al,1
	je	single_mem_8bit
	jb	single_mem_nosize
	call	operand_autodetect
	inc	[base_code]
	call	store_instruction
	jmp	instruction_assembled
      single_mem_nosize:
	cmp	[error_line],0
	jne	single_mem_8bit
	mov	eax,[current_line]
	mov	[error_line],eax
	mov	[error],operand_size_not_specified
      single_mem_8bit:
	call	store_instruction
	jmp	instruction_assembled
      single_reg:
	lods	byte [esi]
	call	convert_register
	mov	bl,al
	mov	al,ah
	cmp	al,1
	je	single_reg_8bit
	call	operand_autodetect
	inc	[base_code]
      single_reg_8bit:
	call	store_nomem_instruction
	jmp	instruction_assembled
mov_instruction:
	mov	[base_code],88h
	lods	byte [esi]
	call	get_size_operator
	cmp	al,10h
	je	mov_reg
	cmp	al,'['
	jne	invalid_operand
      mov_mem:
	call	get_address
	push	edx ebx ecx
	lods	byte [esi]
	cmp	al,','
	jne	invalid_operand
	lods	byte [esi]
	call	get_size_operator
	cmp	al,'('
	je	mov_mem_imm
	cmp	al,10h
	jne	invalid_operand
      mov_mem_reg:
	lods	byte [esi]
	cmp	al,60h
	jb	mov_mem_general_reg
	cmp	al,70h
	jb	mov_mem_sreg
      mov_mem_general_reg:
	call	convert_register
	mov	[postbyte_register],al
	pop	ecx ebx edx
	cmp	ah,1
	je	mov_mem_reg_8bit
	mov	al,ah
	call	operand_autodetect
	mov	al,[postbyte_register]
	or	al,bl
	or	al,bh
	jz	mov_mem_ax
	inc	[base_code]
	call	store_instruction
	jmp	instruction_assembled
      mov_mem_reg_8bit:
	or	al,bl
	or	al,bh
	jz	mov_mem_al
	call	store_instruction
	jmp	instruction_assembled
      mov_mem_al:
	test	ch,22h
	jnz	mov_mem_address16_al
	test	ch,44h
	jnz	mov_mem_address32_al
	test	ch,88h
	jnz	mov_mem_address64_al
	or	ch,ch
	jnz	invalid_address_size
	cmp	[code_type],64
	je	mov_mem_address64_al
	cmp	[code_type],32
	je	mov_mem_address32_al
	cmp	edx,10000h
	jb	mov_mem_address16_al
      mov_mem_address32_al:
	call	store_segment_prefix_if_necessary
	call	address_32bit_prefix
	mov	[base_code],0A2h
      store_mov_address32:
	call	store_instruction_code
	push	instruction_assembled
	jmp	store_address_32bit_value
      mov_mem_address16_al:
	call	store_segment_prefix_if_necessary
	call	address_16bit_prefix
	mov	[base_code],0A2h
      store_mov_address16:
	cmp	[code_type],64
	je	invalid_address
	call	store_instruction_code
	mov	eax,edx
	stos	word [edi]
	cmp	edx,10000h
	jge	value_out_of_range
	jmp	instruction_assembled
      mov_mem_address64_al:
	call	store_segment_prefix_if_necessary
	mov	[base_code],0A2h
      store_mov_address64:
	call	store_instruction_code
	push	instruction_assembled
	jmp	store_address_64bit_value
      mov_mem_ax:
	test	ch,22h
	jnz	mov_mem_address16_ax
	test	ch,44h
	jnz	mov_mem_address32_ax
	test	ch,88h
	jnz	mov_mem_address64_ax
	or	ch,ch
	jnz	invalid_address_size
	cmp	[code_type],64
	je	mov_mem_address64_ax
	cmp	[code_type],32
	je	mov_mem_address32_ax
	cmp	edx,10000h
	jb	mov_mem_address16_ax
      mov_mem_address32_ax:
	call	store_segment_prefix_if_necessary
	call	address_32bit_prefix
	mov	[base_code],0A3h
	jmp	store_mov_address32
      mov_mem_address16_ax:
	call	store_segment_prefix_if_necessary
	call	address_16bit_prefix
	mov	[base_code],0A3h
	jmp	store_mov_address16
      mov_mem_address64_ax:
	call	store_segment_prefix_if_necessary
	mov	[base_code],0A3h
	jmp	store_mov_address64
      mov_mem_sreg:
	sub	al,61h
	mov	[postbyte_register],al
	pop	ecx ebx edx
	mov	ah,[operand_size]
	or	ah,ah
	jz	mov_mem_sreg_store
	cmp	ah,2
	jne	invalid_operand_size
      mov_mem_sreg_store:
	mov	[base_code],8Ch
	call	store_instruction
	jmp	instruction_assembled
      mov_mem_imm:
	mov	al,[operand_size]
	cmp	al,1
	je	mov_mem_imm_8bit
	cmp	al,2
	je	mov_mem_imm_16bit
	cmp	al,4
	je	mov_mem_imm_32bit
	cmp	al,8
	je	mov_mem_imm_64bit
	or	al,al
	jnz	invalid_operand_size
	cmp	[error_line],0
	jne	mov_mem_imm_32bit
	mov	eax,[current_line]
	mov	[error_line],eax
	mov	[error],operand_size_not_specified
	jmp	mov_mem_imm_32bit
      mov_mem_imm_8bit:
	call	get_byte_value
	mov	byte [value],al
	mov	[postbyte_register],0
	mov	[base_code],0C6h
	pop	ecx ebx edx
	call	store_instruction_with_imm8
	jmp	instruction_assembled
      mov_mem_imm_16bit:
	call	operand_16bit
	call	get_word_value
	mov	word [value],ax
	mov	[postbyte_register],0
	mov	[base_code],0C7h
	pop	ecx ebx edx
	call	store_instruction_with_imm16
	jmp	instruction_assembled
      mov_mem_imm_32bit:
	call	operand_32bit
	call	get_dword_value
      mov_mem_imm_32bit_store:
	mov	dword [value],eax
	mov	[postbyte_register],0
	mov	[base_code],0C7h
	pop	ecx ebx edx
	call	store_instruction_with_imm32
	jmp	instruction_assembled
      mov_mem_imm_64bit:
	cmp	[size_declared],0
	jne	long_immediate_not_encodable
	call	operand_64bit
	call	get_simm32
	cmp	[value_type],4
	jae	long_immediate_not_encodable
	jmp	mov_mem_imm_32bit_store
      mov_reg:
	lods	byte [esi]
	mov	ah,al
	sub	ah,10h
	and	ah,al
	test	ah,0F0h
	jnz	mov_sreg
	call	convert_register
	mov	[postbyte_register],al
	lods	byte [esi]
	cmp	al,','
	jne	invalid_operand
	lods	byte [esi]
	call	get_size_operator