math/gen-libm-test.pl

   1 #!/usr/bin/perl -w
   2 # Copyright (C) 1999-2016 Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4 # Contributed by Andreas Jaeger <aj@suse.de>, 1999.
   5
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Lesser General Public
   8 # License as published by the Free Software Foundation; either
   9 # version 2.1 of the License, or (at your option) any later version.
  10
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Lesser General Public License for more details.
  15
  16 # You should have received a copy of the GNU Lesser General Public
  17 # License along with the GNU C Library; if not, see
  18 # <http://www.gnu.org/licenses/>.
  19
  20 # This file needs to be tidied up
  21 # Note that functions and tests share the same namespace.
  22
  23 # Information about tests are stored in: %results
  24 # $results{$test}{"type"} is the result type, e.g. normal or complex.
  25 # $results{$test}{"has_ulps"} is set if deltas exist.
  26 # In the following description $type and $float are:
  27 # - $type is either "normal", "real" (for the real part of a complex number)
  28 #   or "imag" (for the imaginary part # of a complex number).
  29 # - $float is either of float, ifloat, double, idouble, ldouble, ildouble;
  30 #   It represents the underlying floating point type (float, double or long
  31 #   double) and if inline functions (the leading i stands for inline)
  32 #   are used.
  33 # $results{$test}{$type}{"ulp"}{$float} is defined and has a delta as value
  34
  35
  36 use Getopt::Std;
  37
  38 use strict;
  39
  40 use vars qw ($input $output $auto_input);
  41 use vars qw (%results);
  42 use vars qw (%beautify @all_floats %all_floats_pfx);
  43 use vars qw ($output_dir $ulps_file $srcdir);
  44 use vars qw (%auto_tests);
  45
  46 # all_floats is sorted and contains all recognised float types
  47 @all_floats = ('double', 'float', 'idouble',
  48                'ifloat', 'ildouble', 'ldouble');
  49
  50 # all_floats_pfx maps C types to their C like prefix for macros.
  51 %all_floats_pfx =
  52   ( "double" => "DBL",
  53     "ldouble" => "LDBL",
  54     "float" => "FLT",
  55   );
  56
  57 %beautify =
  58   ( "minus_zero" => "-0",
  59     "plus_zero" => "+0",
  60     "-0x0p+0f" => "-0",
  61     "-0x0p+0" => "-0",
  62     "-0x0p+0L" => "-0",
  63     "0x0p+0f" => "+0",
  64     "0x0p+0" => "+0",
  65     "0x0p+0L" => "+0",
  66     "minus_infty" => "-inf",
  67     "plus_infty" => "inf",
  68     "qnan_value" => "qNaN",
  69     "snan_value" => "sNaN",
  70     "snan_value_ld" => "sNaN",
  71   );
  72
  73
  74 # get Options
  75 # Options:
  76 # u: ulps-file
  77 # h: help
  78 # o: output-directory
  79 # n: generate new ulps file
  80 use vars qw($opt_u $opt_h $opt_o $opt_n);
  81 getopts('u:o:nh');
  82
  83 $ulps_file = 'libm-test-ulps';
  84 $output_dir = '';
  85 ($srcdir = $0) =~ s{[^/]*$}{};
  86
  87 if ($opt_h) {
  88   print "Usage: gen-libm-test.pl [OPTIONS]\n";
  89   print " -h         print this help, then exit\n";
  90   print " -o DIR     directory where generated files will be placed\n";
  91   print " -n         only generate sorted file NewUlps from libm-test-ulps\n";
  92   print " -u FILE    input file with ulps\n";
  93   exit 0;
  94 }
  95
  96 $ulps_file = $opt_u if ($opt_u);
  97 $output_dir = $opt_o if ($opt_o);
  98
  99 $input = "libm-test.inc";
 100 $auto_input = "${srcdir}auto-libm-test-out";
 101 $output = "${output_dir}libm-test.c";
 102
 103 &parse_ulps ($ulps_file);
 104 &parse_auto_input ($auto_input);
 105 &generate_testfile ($input, $output) unless ($opt_n);
 106 &output_ulps ("${output_dir}libm-test-ulps.h", $ulps_file) unless ($opt_n);
 107 &print_ulps_file ("${output_dir}NewUlps") if ($opt_n);
 108
 109 # Return a nicer representation
 110 sub beautify {
 111   my ($arg) = @_;
 112   my ($tmp);
 113
 114   if (exists $beautify{$arg}) {
 115     return $beautify{$arg};
 116   }
 117   if ($arg =~ /^-/) {
 118     $tmp = $arg;
 119     $tmp =~ s/^-//;
 120     if (exists $beautify{$tmp}) {
 121       return '-' . $beautify{$tmp};
 122     }
 123   }
 124   if ($arg =~ /^-?0x[0-9a-f.]*p[-+][0-9]+f$/) {
 125     $arg =~ s/f$//;
 126   }
 127   if ($arg =~ /[0-9]L$/) {
 128     $arg =~ s/L$//;
 129   }
 130   return $arg;
 131 }
 132
 133 # Return a nicer representation of a complex number
 134 sub build_complex_beautify {
 135   my ($r, $i) = @_;
 136   my ($str1, $str2);
 137
 138   $str1 = &beautify ($r);
 139   $str2 = &beautify ($i);
 140   if ($str2 =~ /^-/) {
 141     $str2 =~ s/^-//;
 142     $str1 .= ' - ' . $str2;
 143   } else {
 144     $str1 .= ' + ' . $str2;
 145   }
 146   $str1 .= ' i';
 147   return $str1;
 148 }
 149
 150 # Return the text to put in an initializer for a test's exception
 151 # information.
 152 sub show_exceptions {
 153   my ($ignore_result, $non_finite, $test_snan, $exception) = @_;
 154   $ignore_result = ($ignore_result ? "IGNORE_RESULT|" : "");
 155   $non_finite = ($non_finite ? "NON_FINITE|" : "");
 156   $test_snan = ($test_snan ? "TEST_SNAN|" : "");
 157   if (defined $exception) {
 158     return ", ${ignore_result}${non_finite}${test_snan}$exception";
 159   } else {
 160     return ", ${ignore_result}${non_finite}${test_snan}0";
 161   }
 162 }
 163
 164 # Apply the LIT(x) macro to a literal floating point constant
 165 # and strip any existing suffix.
 166 sub _apply_lit {
 167   my ($lit) = @_;
 168   my $exp_re = "([+-])?[[:digit:]]+";
 169   # Don't wrap something that does not look like a:
 170   #  * Hexadecimal FP value
 171   #  * Decimal FP value without a decimal point
 172   #  * Decimal value with a fraction
 173   return $lit if $lit !~ /([+-])?0x[[:xdigit:]\.]+[pP]$exp_re/
 174                  and $lit !~ /[[:digit:]]+[eE]$exp_re/
 175                  and $lit !~ /[[:digit:]]*\.[[:digit:]]*([eE]$exp_re)?/;
 176
 177   # Strip any existing literal suffix.
 178   $lit =~ s/[lLfF]$//;
 179
 180   return "LIT (${lit})";
 181 }
 182
 183 # Apply LIT macro to individual tokens within an expression.
 184 #
 185 # This function assumes the C expression follows GNU coding
 186 # standards.  Specifically, a space separates each lexical
 187 # token.  Otherwise, this post-processing may apply LIT
 188 # incorrectly, or around an entire expression.
 189 sub apply_lit {
 190   my ($lit) = @_;
 191   my @toks = split (/ /, $lit);
 192   foreach (@toks) {
 193     $_ = _apply_lit ($_);
 194   }
 195   return join (' ', @toks);
 196 }
 197
 198 # Parse the arguments to TEST_x_y
 199 sub parse_args {
 200   my ($file, $descr, $args) = @_;
 201   my (@args, $descr_args, $descr_res, @descr);
 202   my ($current_arg, $cline, $cline_res, $i);
 203   my (@special);
 204   my ($call_args);
 205   my ($ignore_result_any, $ignore_result_all);
 206   my ($num_res, @args_res, @start_rm, $rm);
 207   my (@plus_oflow, @minus_oflow, @plus_uflow, @minus_uflow);
 208   my (@errno_plus_oflow, @errno_minus_oflow);
 209   my (@errno_plus_uflow, @errno_minus_uflow);
 210   my ($non_finite, $test_snan);
 211
 212   ($descr_args, $descr_res) = split /_/,$descr, 2;
 213
 214   @args = split /,\s*/, $args;
 215
 216   $call_args = "";
 217
 218   # Generate first the string that's shown to the user
 219   $current_arg = 1;
 220   @descr = split //,$descr_args;
 221   for ($i = 0; $i <= $#descr; $i++) {
 222     my $comma = "";
 223     if ($current_arg > 1) {
 224       $comma = ', ';
 225     }
 226     # FLOAT, int, long int, long long int
 227     if ($descr[$i] =~ /f|j|i|l|L/) {
 228       $call_args .= $comma . &beautify ($args[$current_arg]);
 229       ++$current_arg;
 230       next;
 231     }
 232     # &FLOAT, &int - simplify call by not showing argument.
 233     if ($descr[$i] =~ /F|I/) {
 234       next;
 235     }
 236     # complex
 237     if ($descr[$i] eq 'c') {
 238       $call_args .= $comma . &build_complex_beautify ($args[$current_arg], $args[$current_arg+1]);
 239       $current_arg += 2;
 240       next;
 241     }
 242
 243     die ("$descr[$i] is unknown");
 244   }
 245
 246   # Result
 247   @args_res = @args[$current_arg .. $#args];
 248   $num_res = 0;
 249   @descr = split //,$descr_res;
 250   foreach (@descr) {
 251     if ($_ =~ /f|i|l|L/) {
 252       ++$num_res;
 253     } elsif ($_ eq 'c') {
 254       $num_res += 2;
 255     } elsif ($_ eq 'b') {
 256       # boolean
 257       ++$num_res;
 258     } elsif ($_ eq '1') {
 259       ++$num_res;
 260     } else {
 261       die ("$_ is unknown");
 262     }
 263   }
 264   # consistency check
 265   if ($#args_res == $num_res - 1) {
 266     # One set of results for all rounding modes, no flags.
 267     @start_rm = ( 0, 0, 0, 0 );
 268   } elsif ($#args_res == $num_res) {
 269     # One set of results for all rounding modes, with flags.
 270     die ("wrong number of arguments")
 271       unless ($args_res[$#args_res] =~ /EXCEPTION|ERRNO|IGNORE_ZERO_INF_SIGN|TEST_NAN_SIGN|NO_TEST_INLINE|XFAIL_TEST/);
 272     @start_rm = ( 0, 0, 0, 0 );
 273   } elsif ($#args_res == 4 * $num_res + 3) {
 274     # One set of results per rounding mode, with flags.
 275     @start_rm = ( 0, $num_res + 1, 2 * $num_res + 2, 3 * $num_res + 3 );
 276   } else {
 277     die ("wrong number of arguments");
 278   }
 279
 280   # Put the C program line together
 281   # Reset some variables to start again
 282   $current_arg = 1;
 283   $cline = "{ \"$call_args\"";
 284   @descr = split //,$descr_args;
 285   for ($i=0; $i <= $#descr; $i++) {
 286     # FLOAT, int, long int, long long int
 287     if ($descr[$i] =~ /f|j|i|l|L/) {
 288       if ($descr[$i] eq "f") {
 289         $cline .= ", " . &apply_lit ($args[$current_arg]);
 290       } else {
 291         $cline .= ", $args[$current_arg]";
 292       }
 293       $current_arg++;
 294       next;
 295     }
 296     # &FLOAT, &int
 297     if ($descr[$i] =~ /F|I/) {
 298       next;
 299     }
 300     # complex
 301     if ($descr[$i] eq 'c') {
 302       $cline .= ", " . &apply_lit ($args[$current_arg]);
 303       $cline .= ", " . &apply_lit ($args[$current_arg+1]);
 304       $current_arg += 2;
 305       next;
 306     }
 307   }
 308
 309   @descr = split //,$descr_res;
 310   @plus_oflow = qw(max_value plus_infty max_value plus_infty);
 311   @minus_oflow = qw(minus_infty minus_infty -max_value -max_value);
 312   @plus_uflow = qw(plus_zero plus_zero plus_zero min_subnorm_value);
 313   @minus_uflow = qw(-min_subnorm_value minus_zero minus_zero minus_zero);
 314   @errno_plus_oflow = qw(0 ERRNO_ERANGE 0 ERRNO_ERANGE);
 315   @errno_minus_oflow = qw(ERRNO_ERANGE ERRNO_ERANGE 0 0);
 316   @errno_plus_uflow = qw(ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE 0);
 317   @errno_minus_uflow = qw(0 ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE);
 318   for ($rm = 0; $rm <= 3; $rm++) {
 319     $current_arg = $start_rm[$rm];
 320     $ignore_result_any = 0;
 321     $ignore_result_all = 1;
 322     $cline_res = "";
 323     @special = ();
 324     foreach (@descr) {
 325       if ($_ =~ /b|f|j|i|l|L/ ) {
 326         my ($result) = $args_res[$current_arg];
 327         if ($result eq "IGNORE") {
 328           $ignore_result_any = 1;
 329           $result = "0";
 330         } else {
 331           $ignore_result_all = 0;
 332         }
 333         if ($_ eq "f") {
 334           $result = apply_lit ($result);
 335         }
 336         $cline_res .= ", $result";
 337         $current_arg++;
 338       } elsif ($_ eq 'c') {
 339         my ($result1) = $args_res[$current_arg];
 340         if ($result1 eq "IGNORE") {
 341           $ignore_result_any = 1;
 342           $result1 = "0";
 343         } else {
 344           $ignore_result_all = 0;
 345         }
 346         my ($result2) = $args_res[$current_arg + 1];
 347         if ($result2 eq "IGNORE") {
 348           $ignore_result_any = 1;
 349           $result2 = "0";
 350         } else {
 351           $ignore_result_all = 0;
 352         }
 353         $result1 = apply_lit ($result1);
 354         $result2 = apply_lit ($result2);
 355         $cline_res .= ", $result1, $result2";
 356         $current_arg += 2;
 357       } elsif ($_ eq '1') {
 358         push @special, $args_res[$current_arg];
 359         ++$current_arg;
 360       }
 361     }
 362     if ($ignore_result_any && !$ignore_result_all) {
 363       die ("some but not all function results ignored\n");
 364     }
 365     # Determine whether any arguments or results, for any rounding
 366     # mode, are non-finite.
 367     $non_finite = ($args =~ /qnan_value|snan_value|plus_infty|minus_infty/);
 368     $test_snan = ($args =~ /snan_value/);
 369     # Add exceptions.
 370     $cline_res .= show_exceptions ($ignore_result_any,
 371                                    $non_finite,
 372                                    $test_snan,
 373                                    ($current_arg <= $#args_res)
 374                                    ? $args_res[$current_arg]
 375                                    : undef);
 376
 377     # special treatment for some functions
 378     $i = 0;
 379     foreach (@special) {
 380       ++$i;
 381       my ($extra_expected) = $_;
 382       my ($run_extra) = ($extra_expected ne "IGNORE" ? 1 : 0);
 383       if (!$run_extra) {
 384         $extra_expected = "0";
 385       } else {
 386         $extra_expected = apply_lit ($extra_expected);
 387       }
 388       $cline_res .= ", $run_extra, $extra_expected";
 389     }
 390     $cline_res =~ s/^, //;
 391     $cline_res =~ s/plus_oflow/$plus_oflow[$rm]/g;
 392     $cline_res =~ s/minus_oflow/$minus_oflow[$rm]/g;
 393     $cline_res =~ s/plus_uflow/$plus_uflow[$rm]/g;
 394     $cline_res =~ s/minus_uflow/$minus_uflow[$rm]/g;
 395     $cline_res =~ s/ERRNO_PLUS_OFLOW/$errno_plus_oflow[$rm]/g;
 396     $cline_res =~ s/ERRNO_MINUS_OFLOW/$errno_minus_oflow[$rm]/g;
 397     $cline_res =~ s/ERRNO_PLUS_UFLOW/$errno_plus_uflow[$rm]/g;
 398     $cline_res =~ s/ERRNO_MINUS_UFLOW/$errno_minus_uflow[$rm]/g;
 399     $cline .= ", { $cline_res }";
 400   }
 401   print $file "    $cline },\n";
 402 }
 403
 404 # Convert a condition from auto-libm-test-out to C form.
 405 sub convert_condition {
 406   my ($cond) = @_;
 407   my (@conds, $ret);
 408   @conds = split /:/, $cond;
 409   foreach (@conds) {
 410     s/-/_/g;
 411     s/^/TEST_COND_/;
 412   }
 413   $ret = join " && ", @conds;
 414   return "($ret)";
 415 }
 416
 417 # Return text to OR a value into an accumulated flags string.
 418 sub or_value {
 419   my ($cond) = @_;
 420   if ($cond eq "0") {
 421     return "";
 422   } else {
 423     return " | $cond";
 424   }
 425 }
 426
 427 # Return a conditional expression between two values.
 428 sub cond_value {
 429   my ($cond, $if, $else) = @_;
 430   if ($cond eq "1") {
 431     return $if;
 432   } elsif ($cond eq "0") {
 433     return $else;
 434   } else {
 435     return "($cond ? $if : $else)";
 436   }
 437 }
 438
 439 # Return text to OR a conditional expression between two values into
 440 # an accumulated flags string.
 441 sub or_cond_value {
 442   my ($cond, $if, $else) = @_;
 443   return or_value (cond_value ($cond, $if, $else));
 444 }
 445
 446 # Generate libm-test.c
 447 sub generate_testfile {
 448   my ($input, $output) = @_;
 449
 450   open INPUT, $input or die ("Can't open $input: $!");
 451   open OUTPUT, ">$output" or die ("Can't open $output: $!");
 452
 453   # Replace the special macros
 454   while (<INPUT>) {
 455     # AUTO_TESTS (function),
 456     if (/^\s*AUTO_TESTS_/) {
 457       my ($descr, $func, @modes, $auto_test, $num_auto_tests);
 458       my (@rm_tests, $rm, $i);
 459       @modes = qw(downward tonearest towardzero upward);
 460       ($descr, $func) = ($_ =~ /AUTO_TESTS_(\w+)\s*\((\w+)\)/);
 461       for ($rm = 0; $rm <= 3; $rm++) {
 462         $rm_tests[$rm] = [sort keys %{$auto_tests{$func}{$modes[$rm]}}];
 463       }
 464       $num_auto_tests = scalar @{$rm_tests[0]};
 465       for ($rm = 1; $rm <= 3; $rm++) {
 466         if ($num_auto_tests != scalar @{$rm_tests[$rm]}) {
 467           die ("inconsistent numbers of tests for $func\n");
 468         }
 469         for ($i = 0; $i < $num_auto_tests; $i++) {
 470           if ($rm_tests[0][$i] ne $rm_tests[$rm][$i]) {
 471             die ("inconsistent list of tests of $func\n");
 472           }
 473         }
 474       }
 475       if ($num_auto_tests == 0) {
 476         die ("no automatic tests for $func\n");
 477       }
 478       foreach $auto_test (@{$rm_tests[0]}) {
 479         my ($format, $inputs, $format_conv, $args_str);
 480         ($format, $inputs) = split / /, $auto_test, 2;
 481         $inputs =~ s/ /, /g;
 482         $format_conv = convert_condition ($format);
 483         print OUTPUT "#if $format_conv\n";
 484         $args_str = "$func, $inputs";
 485         for ($rm = 0; $rm <= 3; $rm++) {
 486           my ($auto_test_out, $outputs, $flags);
 487           my ($flags_conv, @flags, %flag_cond);
 488           $auto_test_out = $auto_tests{$func}{$modes[$rm]}{$auto_test};
 489           ($outputs, $flags) = split / : */, $auto_test_out;
 490           $outputs =~ s/ /, /g;
 491           @flags = split / /, $flags;
 492           foreach (@flags) {
 493             if (/^([^:]*):(.*)$/) {
 494               my ($flag, $cond);
 495               $flag = $1;
 496               $cond = convert_condition ($2);
 497               if (defined ($flag_cond{$flag})) {
 498                 if ($flag_cond{$flag} ne "1") {
 499                   $flag_cond{$flag} .= " || $cond";
 500                 }
 501               } else {
 502                 $flag_cond{$flag} = $cond;
 503               }
 504             } else {
 505               $flag_cond{$_} = "1";
 506             }
 507           }
 508           $flags_conv = "";
 509           if (defined ($flag_cond{"ignore-zero-inf-sign"})) {
 510             $flags_conv .= or_cond_value ($flag_cond{"ignore-zero-inf-sign"},
 511                                           "IGNORE_ZERO_INF_SIGN", "0");
 512           }
 513           if (defined ($flag_cond{"no-test-inline"})) {
 514             $flags_conv .= or_cond_value ($flag_cond{"no-test-inline"},
 515                                           "NO_TEST_INLINE", "0");
 516           }
 517           if (defined ($flag_cond{"xfail"})) {
 518             $flags_conv .= or_cond_value ($flag_cond{"xfail"},
 519                                           "XFAIL_TEST", "0");
 520           }
 521           my (@exc_list) = qw(divbyzero inexact invalid overflow underflow);
 522           my ($exc);
 523           foreach $exc (@exc_list) {
 524             my ($exc_expected, $exc_ok, $no_exc, $exc_cond, $exc_ok_cond);
 525             $exc_expected = "\U$exc\E_EXCEPTION";
 526             $exc_ok = "\U$exc\E_EXCEPTION_OK";
 527             $no_exc = "0";
 528             if ($exc eq "inexact") {
 529               $exc_ok = "0";
 530               $no_exc = "NO_INEXACT_EXCEPTION";
 531             }
 532             if (defined ($flag_cond{$exc})) {
 533               $exc_cond = $flag_cond{$exc};
 534             } else {
 535               $exc_cond = "0";
 536             }
 537             if (defined ($flag_cond{"$exc-ok"})) {
 538               $exc_ok_cond = $flag_cond{"$exc-ok"};
 539             } else {
 540               $exc_ok_cond = "0";
 541             }
 542             $flags_conv .= or_cond_value ($exc_cond,
 543                                           cond_value ($exc_ok_cond,
 544                                                       $exc_ok, $exc_expected),
 545                                           cond_value ($exc_ok_cond,
 546                                                       $exc_ok, $no_exc));
 547           }
 548           my ($errno_expected, $errno_unknown_cond);
 549           if (defined ($flag_cond{"errno-edom"})) {
 550             if ($flag_cond{"errno-edom"} ne "1") {
 551               die ("unexpected condition for errno-edom");
 552             }
 553             if (defined ($flag_cond{"errno-erange"})) {
 554               die ("multiple errno values expected");
 555             }
 556             $errno_expected = "ERRNO_EDOM";
 557           } elsif (defined ($flag_cond{"errno-erange"})) {
 558             if ($flag_cond{"errno-erange"} ne "1") {
 559               die ("unexpected condition for errno-erange");
 560             }
 561             $errno_expected = "ERRNO_ERANGE";
 562           } else {
 563             $errno_expected = "ERRNO_UNCHANGED";
 564           }
 565           if (defined ($flag_cond{"errno-edom-ok"})) {
 566             if (defined ($flag_cond{"errno-erange-ok"})
 567                 && ($flag_cond{"errno-erange-ok"}
 568                     ne $flag_cond{"errno-edom-ok"})) {
 569               $errno_unknown_cond = "($flag_cond{\"errno-edom-ok\"} || $flag_cond{\"errno-erange-ok\"})";
 570             } else {
 571               $errno_unknown_cond = $flag_cond{"errno-edom-ok"};
 572             }
 573           } elsif (defined ($flag_cond{"errno-erange-ok"})) {
 574             $errno_unknown_cond = $flag_cond{"errno-erange-ok"};
 575           } else {
 576             $errno_unknown_cond = "0";
 577           }
 578           $flags_conv .= or_cond_value ($errno_unknown_cond,
 579                                         "0", $errno_expected);
 580           if ($flags_conv eq "") {
 581             $flags_conv = ", NO_EXCEPTION";
 582           } else {
 583             $flags_conv =~ s/^ \|/,/;
 584           }
 585           $args_str .= ", $outputs$flags_conv";
 586         }
 587         &parse_args (\*OUTPUT, $descr, $args_str);
 588         print OUTPUT "#endif\n";
 589       }
 590       next;
 591     }
 592
 593     # TEST_...
 594     if (/^\s*TEST_/) {
 595       my ($descr, $args);
 596       chop;
 597       ($descr, $args) = ($_ =~ /TEST_(\w+)\s*\((.*)\)/);
 598       &parse_args (\*OUTPUT, $descr, $args);
 599       next;
 600     }
 601     print OUTPUT;
 602   }
 603   close INPUT;
 604   close OUTPUT;
 605 }
 606
 607
 608
 609 # Parse ulps file
 610 sub parse_ulps {
 611   my ($file) = @_;
 612   my ($test, $type, $float, $eps, $float_regex);
 613
 614   # Build a basic regex to match type entries in the
 615   # generated ULPS file.
 616   foreach my $ftype (@all_floats) {
 617     $float_regex .= "|" . $ftype;
 618   }
 619   $float_regex = "^" . substr ($float_regex, 1) . ":";
 620
 621   # $type has the following values:
 622   # "normal": No complex variable
 623   # "real": Real part of complex result
 624   # "imag": Imaginary part of complex result
 625   open ULP, $file  or die ("Can't open $file: $!");
 626   while (<ULP>) {
 627     chop;
 628     # ignore comments and empty lines
 629     next if /^#/;
 630     next if /^\s*$/;
 631     if (/^Function: /) {
 632       if (/Real part of/) {
 633         s/Real part of //;
 634         $type = 'real';
 635       } elsif (/Imaginary part of/) {
 636         s/Imaginary part of //;
 637         $type = 'imag';
 638       } else {
 639         $type = 'normal';
 640       }
 641       ($test) = ($_ =~ /^Function:\s*\"([a-zA-Z0-9_]+)\"/);
 642       next;
 643     }
 644     if (/$float_regex/) {
 645       ($float, $eps) = split /\s*:\s*/,$_,2;
 646
 647       if ($eps eq "0") {
 648         # ignore
 649         next;
 650       } else {
 651         if (!defined ($results{$test}{$type}{'ulp'}{$float})
 652             || $results{$test}{$type}{'ulp'}{$float} < $eps) {
 653           $results{$test}{$type}{'ulp'}{$float} = $eps;
 654           $results{$test}{'has_ulps'} = 1;
 655         }
 656       }
 657       if ($type =~ /^real|imag$/) {
 658         $results{$test}{'type'} = 'complex';
 659       } elsif ($type eq 'normal') {
 660         $results{$test}{'type'} = 'normal';
 661       }
 662       next;
 663     }
 664     print "Skipping unknown entry: `$_'\n";
 665   }
 666   close ULP;
 667 }
 668
 669
 670 # Clean up a floating point number
 671 sub clean_up_number {
 672   my ($number) = @_;
 673
 674   # Remove trailing zeros after the decimal point
 675   if ($number =~ /\./) {
 676     $number =~ s/0+$//;
 677     $number =~ s/\.$//;
 678   }
 679   return $number;
 680 }
 681
 682 # Output a file which can be read in as ulps file.
 683 sub print_ulps_file {
 684   my ($file) = @_;
 685   my ($test, $type, $float, $eps, $fct, $last_fct);
 686
 687   $last_fct = '';
 688   open NEWULP, ">$file" or die ("Can't open $file: $!");
 689   print NEWULP "# Begin of automatic generation\n";
 690   print NEWULP "\n# Maximal error of functions:\n";
 691
 692   foreach $fct (sort keys %results) {
 693     foreach $type ('real', 'imag', 'normal') {
 694       if (exists $results{$fct}{$type}) {
 695         if ($type eq 'normal') {
 696           print NEWULP "Function: \"$fct\":\n";
 697         } elsif ($type eq 'real') {
 698           print NEWULP "Function: Real part of \"$fct\":\n";
 699         } elsif ($type eq 'imag') {
 700           print NEWULP "Function: Imaginary part of \"$fct\":\n";
 701         }
 702         foreach $float (@all_floats) {
 703           if (exists $results{$fct}{$type}{'ulp'}{$float}) {
 704             print NEWULP "$float: ",
 705             &clean_up_number ($results{$fct}{$type}{'ulp'}{$float}),
 706             "\n";
 707           }
 708         }
 709         print NEWULP "\n";
 710       }
 711     }
 712   }
 713   print NEWULP "# end of automatic generation\n";
 714   close NEWULP;
 715 }
 716
 717 sub get_ulps {
 718   my ($test, $type, $float) = @_;
 719
 720   return (exists $results{$test}{$type}{'ulp'}{$float}
 721           ? $results{$test}{$type}{'ulp'}{$float} : "0");
 722 }
 723
 724 # Return the ulps value for a single test.
 725 sub get_all_ulps_for_test {
 726   my ($test, $type) = @_;
 727   my ($ldouble, $double, $float, $ildouble, $idouble, $ifloat);
 728   my ($ulps_str);
 729
 730   if (exists $results{$test}{'has_ulps'}) {
 731     foreach $float (@all_floats) {
 732       $ulps_str .= &get_ulps ($test, $type, $float) . ", ";
 733     }
 734     return "{" . substr ($ulps_str, 0, -2) . "}";
 735   } else {
 736     die "get_all_ulps_for_test called for \"$test\" with no ulps\n";
 737   }
 738 }
 739
 740 # Print include file
 741 sub output_ulps {
 742   my ($file, $ulps_filename) = @_;
 743   my ($i, $fct, $type, $ulp, $ulp_real, $ulp_imag);
 744   my (%func_ulps, %func_real_ulps, %func_imag_ulps);
 745
 746   open ULP, ">$file" or die ("Can't open $file: $!");
 747
 748   print ULP "/* This file is automatically generated\n";
 749   print ULP "   from $ulps_filename with gen-libm-test.pl.\n";
 750   print ULP "   Don't change it - change instead the master files.  */\n\n";
 751
 752   print ULP "struct ulp_data\n";
 753   print ULP "{\n";
 754   print ULP "  const char *name;\n";
 755   print ULP "  FLOAT max_ulp[" . @all_floats . "];\n";
 756   print ULP "};\n\n";
 757
 758   for ($i = 0; $i <= $#all_floats; $i++) {
 759     $type = $all_floats[$i];
 760     print ULP "#define ULP_";
 761     if ($type =~ /^i/) {
 762       print ULP "I_";
 763       $type = substr $type, 1;
 764     }
 765     print ULP "$all_floats_pfx{$type} $i\n";
 766   }
 767
 768   foreach $fct (keys %results) {
 769     $type = $results{$fct}{'type'};
 770     if ($type eq 'normal') {
 771       $ulp = get_all_ulps_for_test ($fct, 'normal');
 772     } elsif ($type eq 'complex') {
 773       $ulp_real = get_all_ulps_for_test ($fct, 'real');
 774       $ulp_imag = get_all_ulps_for_test ($fct, 'imag');
 775     } else {
 776       die "unknown results ($fct) type $type\n";
 777     }
 778     if ($type eq 'normal') {
 779       $func_ulps{$fct} = $ulp;
 780     } else {
 781       $func_real_ulps{$fct} = $ulp_real;
 782       $func_imag_ulps{$fct} = $ulp_imag;
 783     }
 784   }
 785   print ULP "\n/* Maximal error of functions.  */\n";
 786   print ULP "static const struct ulp_data func_ulps[] =\n  {\n";
 787   foreach $fct (sort keys %func_ulps) {
 788     print ULP "    { \"$fct\", $func_ulps{$fct} },\n";
 789   }
 790   print ULP "  };\n";
 791   print ULP "static const struct ulp_data func_real_ulps[] =\n  {\n";
 792   foreach $fct (sort keys %func_real_ulps) {
 793     print ULP "    { \"$fct\", $func_real_ulps{$fct} },\n";
 794   }
 795   print ULP "  };\n";
 796   print ULP "static const struct ulp_data func_imag_ulps[] =\n  {\n";
 797   foreach $fct (sort keys %func_imag_ulps) {
 798     print ULP "    { \"$fct\", $func_imag_ulps{$fct} },\n";
 799   }
 800   print ULP "  };\n";
 801   close ULP;
 802 }
 803
 804 # Parse auto-libm-test-out.
 805 sub parse_auto_input {
 806   my ($file) = @_;
 807   open AUTO, $file or die ("Can't open $file: $!");
 808   while (<AUTO>) {
 809     chop;
 810     next if !/^= /;
 811     s/^= //;
 812     if (/^(\S+) (\S+) ([^:]*) : (.*)$/) {
 813       $auto_tests{$1}{$2}{$3} = $4;
 814     } else {
 815       die ("bad automatic test line: $_\n");
 816     }
 817   }
 818   close AUTO;
 819 }