#!/bin/sh

# Script to compare functions and instructions used by different igen models.

# Copyright (C) 2002-2018 Free Software Foundation, Inc.

# Contributed by Chris Demetriou of Broadcom Corporation (SiByte).

#

# This file is part of GDB, the GNU debugger.

# 

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# This is a simple-minded script to compare the functions and instructions

# listed for two different models in one or more .igen files.

#

# It was intended to be useful to help factor models into common subsets.

#

# Things to note:

#

#    * igen include directives are not processed!

#

#    * functions and instructions with multiple definitions (e.g., based

#      on model names) are treated as being different.  In other words,

#      if two models have different functions named 'foo', this

#      script will say that one has one of the function definitions, and

#      the other has the other.

if [ "$#" -lt 2 ]; then

	echo "usage: $0 model1 model2 [file ...]" 1>&2

	exit 1

fi

model1="$1"

model2="$2"

shift; shift

gawk -v model1="$model1" -v model2="$model2" -F: -- '

BEGIN {

	thang_count = 0

}

function thang_has_model(t, m) {

#	printf("thang_has_model(%s, %s) (@ %s:%d)\n", t, m,

#	       thangs[t,"file"], thangs[t,"line"]);

	if (thangs[t,"nmodels"] == 0) return 1;

	for (j = 0; j < thangs[t,"nmodels"]; j++) {

#		printf("\tmodel \"%s\"\n", thangs[t,"models",j]);

		if (thangs[t,"models",j] == m) return 1;

	}

#	printf("\t-> 0\n");

	return 0

}

function compare_models(m1, m2) {

#	printf("compare_models(%s, %s)\n", m1, m2);

	seen_any=0

	for (i = 0; i < thang_count; i++) {

		if (thang_has_model(i, m1) && !thang_has_model(i, m2)) {

			if (!seen_any) {

				printf("Things in %s but not in %s:\n", m1, m2);

				seen_any = 1

			}

			printf("%s:%d: %s\n", thangs[i,"file"],

			       thangs[i,"line"], thangs[i,"contents"]);

		}

	}

}

$0 ~ /^:/ && $2 == "model" {

	# ignore.

	# print "model " $0

}

($0 ~ /^:/ && $2 == "function") || \

($0 ~ /^:/ && $2 == "internal") || \

($0 ~ /^[0-9]/) {

	# a function, internal, or instruction.

	current_thang = thang_count

	thang_count++

	thangs[current_thang,"file"] = FILENAME

	thangs[current_thang,"line"] = NR

	thangs[current_thang,"contents"] = $0

	thangs[current_thang,"nmodels"] = 0

	if ($0 ~ /^:/) {

		thangs[current_thang,"type"] = $2

	} else {

		thangs[current_thang,"type"] = "instruction"

	}

}

$0 ~ /^\*/ {

	split(substr($1, 2), tmp_models, /,/)

	for (key in tmp_models) {

		current_model = thangs[current_thang,"nmodels"]

		thangs[current_thang,"nmodels"]++

		thangs[current_thang,"models",current_model] = tmp_models[key]

	}

}

END {

	compare_models(model1, model2)

	if (seen_any) printf("\n");

	compare_models(model2, model1)

}' "$@"

exit "$?"