#! /usr/bin/perl
#
#  TOPPERS/JSP Kernel
#      Toyohashi Open Platform for Embedded Real-Time Systems/
#      Just Standard Profile Kernel
# 
#  Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
#                              Toyohashi Univ. of Technology, JAPAN
#  Copyright (C) 2004 by Embedded and Real-Time Systems Laboratory
#              Graduate School of Information Science, Nagoya Univ., JAPAN
#  Copyright (C) 2005-2007 by Industrial Technology Institute,
#                              Miyagi Prefectural Government, JAPAN
# 
#  嵭Ԥϡʲ (1)(4) ξ狼Free Software Foundation 
#  ˤäƸɽƤ GNU General Public License  Version 2 ˵
#  ҤƤ˸¤ꡤܥեȥܥեȥ
#  ѤΤޤࡥʲƱˤѡʣѡۡʰʲ
#  ѤȸƤ֡ˤ뤳Ȥ̵ǵ롥
#  (1) ܥեȥ򥽡ɤηѤˤϡ嵭
#      ɽѾ浪Ӳ̵ݾڵ꤬Τޤޤηǥ
#      ˴ޤޤƤ뤳ȡ
#  (2) ܥեȥ򡤥饤֥ʤɡ¾Υեȥȯ˻
#      ѤǤǺۤˤϡۤȼɥȡ
#      ԥޥ˥奢ʤɡˤˡ嵭ɽѾ浪Ӳ
#      ̵ݾڵǺܤ뤳ȡ
#  (3) ܥեȥ򡤵Ȥ߹ʤɡ¾Υեȥȯ˻
#      ѤǤʤǺۤˤϡΤ줫ξ
#      ȡ
#    (a) ۤȼɥȡѼԥޥ˥奢ʤɡˤˡ嵭
#        ɽѾ浪Ӳ̵ݾڵǺܤ뤳ȡ
#    (b) ۤη֤̤ˡˤäơTOPPERSץȤ
#        𤹤뤳ȡ
#  (4) ܥեȥѤˤľŪޤϴŪ뤤ʤ»
#      ⡤嵭ԤTOPPERSץȤդ뤳ȡ
# 
#  ܥեȥϡ̵ݾڤ󶡤ƤΤǤ롥嵭Ԥ
#  TOPPERSץȤϡܥեȥ˴ؤơŬѲǽ
#  ޤơʤݾڤԤʤޤܥեȥѤˤľ
#  ŪޤϴŪʤ»˴ؤƤ⡤Ǥʤ
# 
#  @(#) $Id: genoffset,v 1.8 2007/03/23 07:25:47 honda Exp $
# 

#
#  makeoffset.cΥ֥̤鹽¤ΥեåȤ
#ͥѥ H8C
#
#Ȥ
#perl genoffset makeoffset.src
#


#
#  
#
$infile = $ARGV[0];

#
#  ӥåȥ
#
sub search_bit {
	my($val) = @_;
	my($val_bit);

	return(-1) if ($val == 0);

	$val_bit = 0;
	while (($val & 1) == 0) {
		$val >>= 1;
		$val_bit++;
	}
	return($val_bit);
}

#
#  եåͤν
#
#оݥѥ㡧
#MOV.L       #22,ER0
#MOV.L       #H'00000010,ER0
#MOV.W       #4,R0
#MOV.W       #H'0010,R0
#MOV.B       #8,R0L
#MOV.B       #8:8,R0L
#MOV.B       #H'1A:8,R0L
#
sub parse_offset {
	my($label) = @_;
	my($offset);

	while ($line = <INFILE>) {
		chomp $line;
							# 10ʿ4ХȤξ
		if ($line =~ /MOV\.L +#([\d]+)(:32)* *, *ER0/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"%s\"\n", $label, $offset;
			last;
		}
							# 10ʿ2ХȤξ
		elsif ($line =~ /MOV\.W +#([\d]+)(:16)* *, *R0/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"%s\"\n", $label, $offset;
			last;
		}
							# 10ʿ1ХȤξ
		elsif ($line =~ /MOV\.B +#([\d]+)(:8)* *, *R0L/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"%s\"\n", $label, $offset;
			last;
		}
							# 16ʿ4ХȤξ
		elsif ($line =~ /MOV\.L +#H\'([0-9a-fA-F]+)(:32)* *, *ER0/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"H\'%s\"\n", $label, $offset;
			last;
		}
							# 16ʿ2ХȤξ
		elsif ($line =~ /MOV\.W +#H\'([0-9a-fA-F]+)(:16)* *, *R0/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"H\'%s\"\n", $label, $offset;
			last;
		}
							# 16ʿ1ХȤξ
		elsif ($line =~ /MOV\.B +#H\'([0-9a-fA-F]+)(:8)* *, *R0L/) {
			$offset = $1;
			
			# ν
			printf "%s:\t.DEFINE\t\"H\'%s\"\n", $label, $offset;
			last;
		}

		elsif ($line =~ /^ *RTS$/) {	# rts̿ξ
			print "#error Parse error: $label by genoffset script\n";
			close(INFILE);
			print STDERR "Error: parse error $label by genoffset script\n";
			exit(1);
		}
	}
}

#
#  ӥåȥեɤβ
#
sub parse_bit {
	my($label) = @_;
	my($data, $zero, $ptn, $len, $offset, $bit);
	$data = "";

	while ($line = <INFILE>) {
		chomp $line;
		if ($line =~ s/\.DATA\.[LW]//) {
			$line =~ s/[^0-9a-fA-F]//g;
			$data .= $line;
		} else {
			last;
		}
	}
	
	$data =~ /(0+)([^0])/;
	$zero = $1;
	$ptn = $2;
	
	$len = length($zero);
	$offset = int($len / 2);
	$bit = search_bit($ptn);
	if (($len % 2) eq 0) {
		$bit += 4;
	}

	# ν
	printf "%s:\t.DEFINE\t\"%s\"\n", $label, $offset;
	printf "%s_bit:\t.DEFINE\t\"%s\"\n", $label, $bit;
	printf "%s_mask:\t.DEFINE\t\"H\'%x\"\n", $label, (1 << $bit);
}


#
#  ᥤ롼
#
print "; This file is generated by genoffset.\n";
print "\n";

$error = 0;
open(INFILE, $infile) || die "Cannot open $infile";

while ($line = <INFILE>) {
	chomp $line;
	
	if ($line =~ /^_OFFSET_DEF_([^ \t]+):/) {
		do parse_offset($1);
	}
	elsif ($line =~ /^_BIT_FIELD_OFFSET_([^ \t]+):/) {
		do parse_bit($1);
	}
}

close(INFILE);
exit($error);
