#!/usr/bin/perl -w

# Copyright (C) 1999-2018 Free Software Foundation, Inc.

# This file is part of the GNU C Library.

# Contributed by Andreas Jaeger <aj@suse.de>, 1999.

# The GNU C Library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library 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

# Lesser General Public License for more details.

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

# License along with the GNU C Library; if not, see

# <http://www.gnu.org/licenses/>.

# Information about tests are stored in: %results

# $results{$test}{"type"} is the result type, e.g. normal or complex.

# In the following description $platform, $type and $float are:

# - $platform is the used platform

# - $type is either "normal", "real" (for the real part of a complex number)

#   or "imag" (for the imaginary part # of a complex number).

# - $float is either of float, ifloat, double, idouble, ldouble, ildouble;

#   It represents the underlying floating point type (float, double or long

#   double) and if inline functions (the leading i stands for inline)

#   are used.

# $results{$test}{$platform}{$type}{$float} is defined and has a delta

# or 'fail' as value.

use File::Find;

use strict;

use vars qw ($sources @platforms %pplatforms);

use vars qw (%results @all_floats %suffices %all_functions);

# all_floats is in output order and contains all recognised float types that

# we're going to output

@all_floats = ('float', 'double', 'ldouble', 'float128');

%suffices =

  ( 'float' => 'f',

    'double' => '',

    'ldouble' => 'l',

    'float128' => 'f128'

  );

# Pretty description of platform

%pplatforms = ();

%all_functions = ();

if ($#ARGV == 0) {

  $sources = $ARGV[0];

} else {

  $sources = '/usr/src/cvs/libc';

}

find (\&find_files, $sources);

@platforms = sort by_platforms @platforms;

&print_all;

sub find_files {

  if ($_ eq 'libm-test-ulps') {

    # print "Parsing $File::Find::name\n";

    push @platforms, $File::Find::dir;

    my ($file, $name);

    $file = "${File::Find::name}-name";

    open NAME, $file or die ("Can't open $file: $!");

    $name = <NAME>;

    chomp $name;

    close NAME;

    $pplatforms{$File::Find::dir} = $name;

    &parse_ulps ($File::Find::name, $File::Find::dir);

  }

}

# Parse ulps file

sub parse_ulps {

  my ($file, $platform) = @_;

  my ($test, $type, $float, $eps, $ignore_fn);

  # $type has the following values:

  # "normal": No complex variable

  # "real": Real part of complex result

  # "imag": Imaginary part of complex result

  open ULP, $file  or die ("Can't open $file: $!");

  while (<ULP>) {

    chop;

    # ignore comments and empty lines

    next if /^#/;

    next if /^\s*$/;

    if (/^Function: /) {

      if (/Real part of/) {

	s/Real part of //;

	$type = 'real';

      } elsif (/Imaginary part of/) {

	s/Imaginary part of //;

	$type = 'imag';

      } else {

	$type = 'normal';

      }

      ($test) = ($_ =~ /^Function:\s*\"([a-zA-Z0-9_]+)\"/);

      next;

    }

    if ($test =~ /_(downward|towardzero|upward|vlen)/) {

      $ignore_fn = 1;

    } else {

      $ignore_fn = 0;

      $all_functions{$test} = 1;

    }

    if (/^i?(float|double|ldouble|float128):/) {

      ($float, $eps) = split /\s*:\s*/,$_,2;

      if ($ignore_fn) {

	next;

      } elsif ($eps eq 'fail') {

	$results{$test}{$platform}{$type}{$float} = 'fail';

      } elsif ($eps eq "0") {

	# ignore

	next;

      } elsif (!exists $results{$test}{$platform}{$type}{$float}

	    || $results{$test}{$platform}{$type}{$float} ne 'fail') {

	$results{$test}{$platform}{$type}{$float} = $eps;

      }

      if ($type =~ /^real|imag$/) {

	$results{$test}{'type'} = 'complex';

      } elsif ($type eq 'normal') {

	$results{$test}{'type'} = 'normal';

      }

      next;

    }

    print "Skipping unknown entry: `$_'\n";

  }

  close ULP;

}

sub get_value {

  my ($fct, $platform, $type, $float) = @_;

  return (exists $results{$fct}{$platform}{$type}{$float}

	  ? $results{$fct}{$platform}{$type}{$float} : "0");

}

sub print_platforms {

  my (@p) = @_;

  my ($fct, $platform, $float, $first, $i, $platform_no, $platform_total);

  print '@multitable {nexttowardf} ';

  foreach (@p) {

    print ' {1000 + i 1000}';

  }

  print "\n";

  print '@item Function ';

  foreach (@p) {

    print ' @tab ';

    print $pplatforms{$_};

  }

  print "\n";

  foreach $fct (sort keys %all_functions) {

    foreach $float (@all_floats) {

      print "\@item $fct$suffices{$float} ";

      foreach $platform (@p) {

	print ' @tab ';

	if (exists $results{$fct}{$platform}{'normal'}{$float}

	    || exists $results{$fct}{$platform}{'real'}{$float}

	    || exists $results{$fct}{$platform}{'imag'}{$float}) {

	  if ($results{$fct}{'type'} eq 'complex') {

	    print &get_value ($fct, $platform, 'real', $float),

	    ' + i ', &get_value ($fct, $platform, 'imag', $float);

	  } else {

	    print $results{$fct}{$platform}{'normal'}{$float};

	  }

	} else {

	  print '-';

	}

      }

      print "\n";

    }

  }

  print "\@end multitable\n";

}

sub print_all {

  my ($i, $max);

  my ($columns) = 5;

  # Print only 5 platforms at a time.

  for ($i=0; $i < $#platforms; $i+=$columns) {

    $max = $i+$columns-1 > $#platforms ? $#platforms : $i+$columns-1;

    print_platforms (@platforms[$i .. $max]);

  }

}

sub by_platforms {

  return $pplatforms{$a} cmp $pplatforms{$b};

}