math/gen-libm-test.pl

   1 #!/usr/bin/perl -w
   2 # Copyright (C) 1999-2017 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 $auto_input);
  41 use vars qw (%results);
  42 use vars qw (%beautify @all_floats %all_floats_pfx);
  43 use vars qw ($ulps_file);
  44 use vars qw (%auto_tests);
  45
  46 # all_floats is sorted and contains all recognised float types
  47 @all_floats = ('double', 'float', 'float128', 'idouble',
  48                'ifloat', 'ifloat128', '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     "float128" => "FLT128",
  56   );
  57
  58 %beautify =
  59   ( "minus_zero" => "-0",
  60     "plus_zero" => "+0",
  61     "-0x0p+0f" => "-0",
  62     "-0x0p+0" => "-0",
  63     "-0x0p+0L" => "-0",
  64     "0x0p+0f" => "+0",
  65     "0x0p+0" => "+0",
  66     "0x0p+0L" => "+0",
  67     "minus_infty" => "-inf",
  68     "plus_infty" => "inf",
  69     "qnan_value" => "qNaN",
  70     "snan_value" => "sNaN",
  71     "snan_value_ld" => "sNaN",
  72   );
  73
  74
  75 # get Options
  76 # Options:
  77 # a: auto-libm-test-out input file
  78 # c: .inc input file
  79 # u: ulps-file
  80 # n: new ulps file
  81 # C: libm-test.c output file
  82 # H: libm-test-ulps.h output file
  83 # h: help
  84 use vars qw($opt_a $opt_c $opt_u $opt_n $opt_C $opt_H $opt_h);
  85 getopts('a:c:u:n:C:H:h');
  86
  87 $ulps_file = 'libm-test-ulps';
  88
  89 if ($opt_h) {
  90   print "Usage: gen-libm-test.pl [OPTIONS]\n";
  91   print " -h         print this help, then exit\n";
  92   print " -a FILE    input file with automatically generated tests\n";
  93   print " -c FILE    input file .inc file with tests\n";
  94   print " -u FILE    input file with ulps\n";
  95   print " -n FILE    generate sorted file FILE from libm-test-ulps\n";
  96   print " -C FILE    generate output C file FILE from libm-test.inc\n";
  97   print " -H FILE    generate output ulps header FILE from libm-test-ulps\n";
  98   exit 0;
  99 }
 100
 101 $ulps_file = $opt_u if ($opt_u);
 102
 103 $input = $opt_c if ($opt_c);
 104 $auto_input = $opt_a if ($opt_a);
 105 $output = $opt_C if ($opt_C);
 106
 107 &parse_ulps ($ulps_file) if ($opt_H || $opt_n);
 108 &parse_auto_input ($auto_input) if ($opt_C);
 109 &generate_testfile ($input, $output) if ($opt_C);
 110 &output_ulps ($opt_H, $ulps_file) if ($opt_H);
 111 &print_ulps_file ($opt_n) if ($opt_n);
 112
 113 # Return a nicer representation
 114 sub beautify {
 115   my ($arg) = @_;
 116   my ($tmp);
 117
 118   if (exists $beautify{$arg}) {
 119     return $beautify{$arg};
 120   }
 121   if ($arg =~ /^-/) {
 122     $tmp = $arg;
 123     $tmp =~ s/^-//;
 124     if (exists $beautify{$tmp}) {
 125       return '-' . $beautify{$tmp};
 126     }
 127   }
 128   if ($arg =~ /^-?0x[0-9a-f.]*p[-+][0-9]+f$/) {
 129     $arg =~ s/f$//;
 130   }
 131   if ($arg =~ /[0-9]L$/) {
 132     $arg =~ s/L$//;
 133   }
 134   return $arg;
 135 }
 136
 137 # Return a nicer representation of a complex number
 138 sub build_complex_beautify {
 139   my ($r, $i) = @_;
 140   my ($str1, $str2);
 141
 142   $str1 = &beautify ($r);
 143   $str2 = &beautify ($i);
 144   if ($str2 =~ /^-/) {
 145     $str2 =~ s/^-//;
 146     $str1 .= ' - ' . $str2;
 147   } else {
 148     $str1 .= ' + ' . $str2;
 149   }
 150   $str1 .= ' i';
 151   return $str1;
 152 }
 153
 154 # Return the text to put in an initializer for a test's exception
 155 # information.
 156 sub show_exceptions {
 157   my ($ignore_result, $non_finite, $test_snan, $exception) = @_;
 158   $ignore_result = ($ignore_result ? "IGNORE_RESULT|" : "");
 159   $non_finite = ($non_finite ? "NON_FINITE|" : "");
 160   $test_snan = ($test_snan ? "TEST_SNAN|" : "");
 161   if (defined $exception) {
 162     return ", ${ignore_result}${non_finite}${test_snan}$exception";
 163   } else {
 164     return ", ${ignore_result}${non_finite}${test_snan}0";
 165   }
 166 }
 167
 168 # Apply the LIT(x) macro to a literal floating point constant
 169 # and strip any existing suffix.
 170 sub _apply_lit {
 171   my ($lit) = @_;
 172   my $exp_re = "([+-])?[[:digit:]]+";
 173   # Don't wrap something that does not look like a:
 174   #  * Hexadecimal FP value
 175   #  * Decimal FP value without a decimal point
 176   #  * Decimal value with a fraction
 177   return $lit if $lit !~ /([+-])?0x[[:xdigit:]\.]+[pP]$exp_re/
 178                  and $lit !~ /[[:digit:]]+[eE]$exp_re/
 179                  and $lit !~ /[[:digit:]]*\.[[:digit:]]*([eE]$exp_re)?/;
 180
 181   # Strip any existing literal suffix.
 182   $lit =~ s/[lLfF]$//;
 183
 184   return "LIT (${lit})";
 185 }
 186
 187 # Apply LIT macro to individual tokens within an expression.
 188 #
 189 # This function assumes the C expression follows GNU coding
 190 # standards.  Specifically, a space separates each lexical
 191 # token.  Otherwise, this post-processing may apply LIT
 192 # incorrectly, or around an entire expression.
 193 sub apply_lit {
 194   my ($lit) = @_;
 195   my @toks = split (/ /, $lit);
 196   foreach (@toks) {
 197     $_ = _apply_lit ($_);
 198   }
 199   return join (' ', @toks);
 200 }
 201
 202 # Parse the arguments to TEST_x_y
 203 sub parse_args {
 204   my ($file, $descr, $args) = @_;
 205   my (@args, $descr_args, $descr_res, @descr);
 206   my ($current_arg, $cline, $cline_res, $i);
 207   my (@special);
 208   my ($call_args);
 209   my ($ignore_result_any, $ignore_result_all);
 210   my ($num_res, @args_res, @start_rm, $rm);
 211   my (@plus_oflow, @minus_oflow, @plus_uflow, @minus_uflow);
 212   my (@errno_plus_oflow, @errno_minus_oflow);
 213   my (@errno_plus_uflow, @errno_minus_uflow);
 214   my (@xfail_rounding_ibm128_libgcc);
 215   my ($non_finite, $test_snan);
 216
 217   ($descr_args, $descr_res) = split /_/,$descr, 2;
 218
 219   @args = split /,\s*/, $args;
 220
 221   $call_args = "";
 222
 223   # Generate first the string that's shown to the user
 224   $current_arg = 1;
 225   @descr = split //,$descr_args;
 226   for ($i = 0; $i <= $#descr; $i++) {
 227     my $comma = "";
 228     if ($current_arg > 1) {
 229       $comma = ', ';
 230     }
 231     # FLOAT, long double, int, unsigned int, long int, long long int
 232     if ($descr[$i] =~ /f|j|i|u|l|L/) {
 233       $call_args .= $comma . &beautify ($args[$current_arg]);
 234       ++$current_arg;
 235       next;
 236     }
 237     # Argument passed via pointer.
 238     if ($descr[$i] =~ /p/) {
 239       next;
 240     }
 241     # &FLOAT, &int - simplify call by not showing argument.
 242     if ($descr[$i] =~ /F|I/) {
 243       next;
 244     }
 245     # complex
 246     if ($descr[$i] eq 'c') {
 247       $call_args .= $comma . &build_complex_beautify ($args[$current_arg], $args[$current_arg+1]);
 248       $current_arg += 2;
 249       next;
 250     }
 251
 252     die ("$descr[$i] is unknown");
 253   }
 254
 255   # Result
 256   @args_res = @args[$current_arg .. $#args];
 257   $num_res = 0;
 258   @descr = split //,$descr_res;
 259   foreach (@descr) {
 260     if ($_ =~ /f|i|l|L|M|U/) {
 261       ++$num_res;
 262     } elsif ($_ eq 'c') {
 263       $num_res += 2;
 264     } elsif ($_ eq 'b') {
 265       # boolean
 266       ++$num_res;
 267     } elsif ($_ eq '1') {
 268       ++$num_res;
 269     } else {
 270       die ("$_ is unknown");
 271     }
 272   }
 273   # consistency check
 274   if ($#args_res == $num_res - 1) {
 275     # One set of results for all rounding modes, no flags.
 276     @start_rm = ( 0, 0, 0, 0 );
 277   } elsif ($#args_res == $num_res) {
 278     # One set of results for all rounding modes, with flags.
 279     die ("wrong number of arguments")
 280       unless ($args_res[$#args_res] =~ /EXCEPTION|ERRNO|IGNORE_ZERO_INF_SIGN|TEST_NAN_SIGN|NO_TEST_INLINE|XFAIL/);
 281     @start_rm = ( 0, 0, 0, 0 );
 282   } elsif ($#args_res == 4 * $num_res + 3) {
 283     # One set of results per rounding mode, with flags.
 284     @start_rm = ( 0, $num_res + 1, 2 * $num_res + 2, 3 * $num_res + 3 );
 285   } else {
 286     die ("wrong number of arguments");
 287   }
 288
 289   # Put the C program line together
 290   # Reset some variables to start again
 291   $current_arg = 1;
 292   $call_args =~ s/\"/\\\"/g;
 293   $cline = "{ \"$call_args\"";
 294   @descr = split //,$descr_args;
 295   for ($i=0; $i <= $#descr; $i++) {
 296     # FLOAT, int, long int, long long int
 297     if ($descr[$i] =~ /f|j|i|u|l|L/) {
 298       if ($descr[$i] eq "f") {
 299         $cline .= ", " . &apply_lit ($args[$current_arg]);
 300       } else {
 301         $cline .= ", $args[$current_arg]";
 302       }
 303       $current_arg++;
 304       next;
 305     }
 306     # &FLOAT, &int, argument passed via pointer
 307     if ($descr[$i] =~ /F|I|p/) {
 308       next;
 309     }
 310     # complex
 311     if ($descr[$i] eq 'c') {
 312       $cline .= ", " . &apply_lit ($args[$current_arg]);
 313       $cline .= ", " . &apply_lit ($args[$current_arg+1]);
 314       $current_arg += 2;
 315       next;
 316     }
 317   }
 318
 319   @descr = split //,$descr_res;
 320   @plus_oflow = qw(max_value plus_infty max_value plus_infty);
 321   @minus_oflow = qw(minus_infty minus_infty -max_value -max_value);
 322   @plus_uflow = qw(plus_zero plus_zero plus_zero min_subnorm_value);
 323   @minus_uflow = qw(-min_subnorm_value minus_zero minus_zero minus_zero);
 324   @errno_plus_oflow = qw(0 ERRNO_ERANGE 0 ERRNO_ERANGE);
 325   @errno_minus_oflow = qw(ERRNO_ERANGE ERRNO_ERANGE 0 0);
 326   @errno_plus_uflow = qw(ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE 0);
 327   @errno_minus_uflow = qw(0 ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE);
 328   @xfail_rounding_ibm128_libgcc = qw(XFAIL_IBM128_LIBGCC 0
 329                                      XFAIL_IBM128_LIBGCC XFAIL_IBM128_LIBGCC);
 330   for ($rm = 0; $rm <= 3; $rm++) {
 331     $current_arg = $start_rm[$rm];
 332     $ignore_result_any = 0;
 333     $ignore_result_all = 1;
 334     $cline_res = "";
 335     @special = ();
 336     foreach (@descr) {
 337       if ($_ =~ /b|f|j|i|l|L|M|U/ ) {
 338         my ($result) = $args_res[$current_arg];
 339         if ($result eq "IGNORE") {
 340           $ignore_result_any = 1;
 341           $result = "0";
 342         } else {
 343           $ignore_result_all = 0;
 344         }
 345         if ($_ eq "f") {
 346           $result = apply_lit ($result);
 347         }
 348         $cline_res .= ", $result";
 349         $current_arg++;
 350       } elsif ($_ eq 'c') {
 351         my ($result1) = $args_res[$current_arg];
 352         if ($result1 eq "IGNORE") {
 353           $ignore_result_any = 1;
 354           $result1 = "0";
 355         } else {
 356           $ignore_result_all = 0;
 357         }
 358         my ($result2) = $args_res[$current_arg + 1];
 359         if ($result2 eq "IGNORE") {
 360           $ignore_result_any = 1;
 361           $result2 = "0";
 362         } else {
 363           $ignore_result_all = 0;
 364         }
 365         $result1 = apply_lit ($result1);
 366         $result2 = apply_lit ($result2);
 367         $cline_res .= ", $result1, $result2";
 368         $current_arg += 2;
 369       } elsif ($_ eq '1') {
 370         push @special, $args_res[$current_arg];
 371         ++$current_arg;
 372       }
 373     }
 374     if ($ignore_result_any && !$ignore_result_all) {
 375       die ("some but not all function results ignored\n");
 376     }
 377     # Determine whether any arguments or results, for any rounding
 378     # mode, are non-finite.
 379     $non_finite = ($args =~ /qnan_value|snan_value|plus_infty|minus_infty/);
 380     $test_snan = ($args =~ /snan_value/);
 381     # Add exceptions.
 382     $cline_res .= show_exceptions ($ignore_result_any,
 383                                    $non_finite,
 384                                    $test_snan,
 385                                    ($current_arg <= $#args_res)
 386                                    ? $args_res[$current_arg]
 387                                    : undef);
 388
 389     # special treatment for some functions
 390     $i = 0;
 391     foreach (@special) {
 392       ++$i;
 393       my ($extra_expected) = $_;
 394       my ($run_extra) = ($extra_expected ne "IGNORE" ? 1 : 0);
 395       if (!$run_extra) {
 396         $extra_expected = "0";
 397       } else {
 398         $extra_expected = apply_lit ($extra_expected);
 399       }
 400       $cline_res .= ", $run_extra, $extra_expected";
 401     }
 402     $cline_res =~ s/^, //;
 403     $cline_res =~ s/plus_oflow/$plus_oflow[$rm]/g;
 404     $cline_res =~ s/minus_oflow/$minus_oflow[$rm]/g;
 405     $cline_res =~ s/plus_uflow/$plus_uflow[$rm]/g;
 406     $cline_res =~ s/minus_uflow/$minus_uflow[$rm]/g;
 407     $cline_res =~ s/ERRNO_PLUS_OFLOW/$errno_plus_oflow[$rm]/g;
 408     $cline_res =~ s/ERRNO_MINUS_OFLOW/$errno_minus_oflow[$rm]/g;
 409     $cline_res =~ s/ERRNO_PLUS_UFLOW/$errno_plus_uflow[$rm]/g;
 410     $cline_res =~ s/ERRNO_MINUS_UFLOW/$errno_minus_uflow[$rm]/g;
 411     $cline_res =~ s/XFAIL_ROUNDING_IBM128_LIBGCC/$xfail_rounding_ibm128_libgcc[$rm]/g;
 412     $cline .= ", { $cline_res }";
 413   }
 414   print $file "    $cline },\n";
 415 }
 416
 417 # Convert a condition from auto-libm-test-out to C form.
 418 sub convert_condition {
 419   my ($cond) = @_;
 420   my (@conds, $ret);
 421   @conds = split /:/, $cond;
 422   foreach (@conds) {
 423     s/-/_/g;
 424     s/^/TEST_COND_/;
 425   }
 426   $ret = join " && ", @conds;
 427   return "($ret)";
 428 }
 429
 430 # Return text to OR a value into an accumulated flags string.
 431 sub or_value {
 432   my ($cond) = @_;
 433   if ($cond eq "0") {
 434     return "";
 435   } else {
 436     return " | $cond";
 437   }
 438 }
 439
 440 # Return a conditional expression between two values.
 441 sub cond_value {
 442   my ($cond, $if, $else) = @_;
 443   if ($cond eq "1") {
 444     return $if;
 445   } elsif ($cond eq "0") {
 446     return $else;
 447   } else {
 448     return "($cond ? $if : $else)";
 449   }
 450 }
 451
 452 # Return text to OR a conditional expression between two values into
 453 # an accumulated flags string.
 454 sub or_cond_value {
 455   my ($cond, $if, $else) = @_;
 456   return or_value (cond_value ($cond, $if, $else));
 457 }
 458
 459 # Generate libm-test.c
 460 sub generate_testfile {
 461   my ($input, $output) = @_;
 462
 463   open INPUT, $input or die ("Can't open $input: $!");
 464   open OUTPUT, ">$output" or die ("Can't open $output: $!");
 465
 466   # Replace the special macros
 467   while (<INPUT>) {
 468     # AUTO_TESTS (function),
 469     if (/^\s*AUTO_TESTS_/) {
 470       my ($descr, $func, @modes, $auto_test, $num_auto_tests);
 471       my (@rm_tests, $rm, $i);
 472       @modes = qw(downward tonearest towardzero upward);
 473       ($descr, $func) = ($_ =~ /AUTO_TESTS_(\w+)\s*\((\w+)\)/);
 474       for ($rm = 0; $rm <= 3; $rm++) {
 475         $rm_tests[$rm] = [sort keys %{$auto_tests{$func}{$modes[$rm]}}];
 476       }
 477       $num_auto_tests = scalar @{$rm_tests[0]};
 478       for ($rm = 1; $rm <= 3; $rm++) {
 479         if ($num_auto_tests != scalar @{$rm_tests[$rm]}) {
 480           die ("inconsistent numbers of tests for $func\n");
 481         }
 482         for ($i = 0; $i < $num_auto_tests; $i++) {
 483           if ($rm_tests[0][$i] ne $rm_tests[$rm][$i]) {
 484             die ("inconsistent list of tests of $func\n");
 485           }
 486         }
 487       }
 488       if ($num_auto_tests == 0) {
 489         die ("no automatic tests for $func\n");
 490       }
 491       foreach $auto_test (@{$rm_tests[0]}) {
 492         my ($format, $inputs, $format_conv, $args_str);
 493         ($format, $inputs) = split / /, $auto_test, 2;
 494         $inputs =~ s/ /, /g;
 495         $format_conv = convert_condition ($format);
 496         print OUTPUT "#if $format_conv\n";
 497         $args_str = "$func, $inputs";
 498         for ($rm = 0; $rm <= 3; $rm++) {
 499           my ($auto_test_out, $outputs, $flags);
 500           my ($flags_conv, @flags, %flag_cond);
 501           $auto_test_out = $auto_tests{$func}{$modes[$rm]}{$auto_test};
 502           ($outputs, $flags) = split / : */, $auto_test_out;
 503           $outputs =~ s/ /, /g;
 504           @flags = split / /, $flags;
 505           foreach (@flags) {
 506             if (/^([^:]*):(.*)$/) {
 507               my ($flag, $cond);
 508               $flag = $1;
 509               $cond = convert_condition ($2);
 510               if (defined ($flag_cond{$flag})) {
 511                 if ($flag_cond{$flag} ne "1") {
 512                   $flag_cond{$flag} .= " || $cond";
 513                 }
 514               } else {
 515                 $flag_cond{$flag} = $cond;
 516               }
 517             } else {
 518               $flag_cond{$_} = "1";
 519             }
 520           }
 521           $flags_conv = "";
 522           if (defined ($flag_cond{"ignore-zero-inf-sign"})) {
 523             $flags_conv .= or_cond_value ($flag_cond{"ignore-zero-inf-sign"},
 524                                           "IGNORE_ZERO_INF_SIGN", "0");
 525           }
 526           if (defined ($flag_cond{"no-test-inline"})) {
 527             $flags_conv .= or_cond_value ($flag_cond{"no-test-inline"},
 528                                           "NO_TEST_INLINE", "0");
 529           }
 530           if (defined ($flag_cond{"xfail"})) {
 531             $flags_conv .= or_cond_value ($flag_cond{"xfail"},
 532                                           "XFAIL_TEST", "0");
 533           }
 534           my (@exc_list) = qw(divbyzero inexact invalid overflow underflow);
 535           my ($exc);
 536           foreach $exc (@exc_list) {
 537             my ($exc_expected, $exc_ok, $no_exc, $exc_cond, $exc_ok_cond);
 538             $exc_expected = "\U$exc\E_EXCEPTION";
 539             $exc_ok = "\U$exc\E_EXCEPTION_OK";
 540             $no_exc = "0";
 541             if ($exc eq "inexact") {
 542               $exc_ok = "0";
 543               $no_exc = "NO_INEXACT_EXCEPTION";
 544             }
 545             if (defined ($flag_cond{$exc})) {
 546               $exc_cond = $flag_cond{$exc};
 547             } else {
 548               $exc_cond = "0";
 549             }
 550             if (defined ($flag_cond{"$exc-ok"})) {
 551               $exc_ok_cond = $flag_cond{"$exc-ok"};
 552             } else {
 553               $exc_ok_cond = "0";
 554             }
 555             $flags_conv .= or_cond_value ($exc_cond,
 556                                           cond_value ($exc_ok_cond,
 557                                                       $exc_ok, $exc_expected),
 558                                           cond_value ($exc_ok_cond,
 559                                                       $exc_ok, $no_exc));
 560           }
 561           my ($errno_expected, $errno_unknown_cond);
 562           if (defined ($flag_cond{"errno-edom"})) {
 563             if ($flag_cond{"errno-edom"} ne "1") {
 564               die ("unexpected condition for errno-edom");
 565             }
 566             if (defined ($flag_cond{"errno-erange"})) {
 567               die ("multiple errno values expected");
 568             }
 569             $errno_expected = "ERRNO_EDOM";
 570           } elsif (defined ($flag_cond{"errno-erange"})) {
 571             if ($flag_cond{"errno-erange"} ne "1") {
 572               die ("unexpected condition for errno-erange");
 573             }
 574             $errno_expected = "ERRNO_ERANGE";
 575           } else {
 576             $errno_expected = "ERRNO_UNCHANGED";
 577           }
 578           if (defined ($flag_cond{"errno-edom-ok"})) {
 579             if (defined ($flag_cond{"errno-erange-ok"})
 580                 && ($flag_cond{"errno-erange-ok"}
 581                     ne $flag_cond{"errno-edom-ok"})) {
 582               $errno_unknown_cond = "($flag_cond{\"errno-edom-ok\"} || $flag_cond{\"errno-erange-ok\"})";
 583             } else {
 584               $errno_unknown_cond = $flag_cond{"errno-edom-ok"};
 585             }
 586           } elsif (defined ($flag_cond{"errno-erange-ok"})) {
 587             $errno_unknown_cond = $flag_cond{"errno-erange-ok"};
 588           } else {
 589             $errno_unknown_cond = "0";
 590           }
 591           $flags_conv .= or_cond_value ($errno_unknown_cond,
 592                                         "0", $errno_expected);
 593           if ($flags_conv eq "") {
 594             $flags_conv = ", NO_EXCEPTION";
 595           } else {
 596             $flags_conv =~ s/^ \|/,/;
 597           }
 598           $args_str .= ", $outputs$flags_conv";
 599         }
 600         &parse_args (\*OUTPUT, $descr, $args_str);
 601         print OUTPUT "#endif\n";
 602       }
 603       next;
 604     }
 605
 606     # TEST_...
 607     if (/^\s*TEST_/) {
 608       my ($descr, $args);
 609       chop;
 610       ($descr, $args) = ($_ =~ /TEST_(\w+)\s*\((.*)\)/);
 611       &parse_args (\*OUTPUT, $descr, $args);
 612       next;
 613     }
 614     print OUTPUT;
 615   }
 616   close INPUT;
 617   close OUTPUT;
 618 }
 619
 620
 621
 622 # Parse ulps file
 623 sub parse_ulps {
 624   my ($file) = @_;
 625   my ($test, $type, $float, $eps, $float_regex);
 626
 627   # Build a basic regex to match type entries in the
 628   # generated ULPS file.
 629   foreach my $ftype (@all_floats) {
 630     $float_regex .= "|" . $ftype;
 631   }
 632   $float_regex = "^" . substr ($float_regex, 1) . ":";
 633
 634   # $type has the following values:
 635   # "normal": No complex variable
 636   # "real": Real part of complex result
 637   # "imag": Imaginary part of complex result
 638   open ULP, $file  or die ("Can't open $file: $!");
 639   while (<ULP>) {
 640     chop;
 641     # ignore comments and empty lines
 642     next if /^#/;
 643     next if /^\s*$/;
 644     if (/^Function: /) {
 645       if (/Real part of/) {
 646         s/Real part of //;
 647         $type = 'real';
 648       } elsif (/Imaginary part of/) {
 649         s/Imaginary part of //;
 650         $type = 'imag';
 651       } else {
 652         $type = 'normal';
 653       }
 654       ($test) = ($_ =~ /^Function:\s*\"([a-zA-Z0-9_]+)\"/);
 655       next;
 656     }
 657     if (/$float_regex/) {
 658       ($float, $eps) = split /\s*:\s*/,$_,2;
 659
 660       if ($eps eq "0") {
 661         # ignore
 662         next;
 663       } else {
 664         if (!defined ($results{$test}{$type}{'ulp'}{$float})
 665             || $results{$test}{$type}{'ulp'}{$float} < $eps) {
 666           $results{$test}{$type}{'ulp'}{$float} = $eps;
 667           $results{$test}{'has_ulps'} = 1;
 668         }
 669       }
 670       if ($type =~ /^real|imag$/) {
 671         $results{$test}{'type'} = 'complex';
 672       } elsif ($type eq 'normal') {
 673         $results{$test}{'type'} = 'normal';
 674       }
 675       next;
 676     }
 677     print "Skipping unknown entry: `$_'\n";
 678   }
 679   close ULP;
 680 }
 681
 682
 683 # Clean up a floating point number
 684 sub clean_up_number {
 685   my ($number) = @_;
 686
 687   # Remove trailing zeros after the decimal point
 688   if ($number =~ /\./) {
 689     $number =~ s/0+$//;
 690     $number =~ s/\.$//;
 691   }
 692   return $number;
 693 }
 694
 695 # Output a file which can be read in as ulps file.
 696 sub print_ulps_file {
 697   my ($file) = @_;
 698   my ($test, $type, $float, $eps, $fct, $last_fct);
 699
 700   $last_fct = '';
 701   open NEWULP, ">$file" or die ("Can't open $file: $!");
 702   print NEWULP "# Begin of automatic generation\n";
 703   print NEWULP "\n# Maximal error of functions:\n";
 704
 705   foreach $fct (sort keys %results) {
 706     foreach $type ('real', 'imag', 'normal') {
 707       if (exists $results{$fct}{$type}) {
 708         if ($type eq 'normal') {
 709           print NEWULP "Function: \"$fct\":\n";
 710         } elsif ($type eq 'real') {
 711           print NEWULP "Function: Real part of \"$fct\":\n";
 712         } elsif ($type eq 'imag') {
 713           print NEWULP "Function: Imaginary part of \"$fct\":\n";
 714         }
 715         foreach $float (@all_floats) {
 716           if (exists $results{$fct}{$type}{'ulp'}{$float}) {
 717             print NEWULP "$float: ",
 718             &clean_up_number ($results{$fct}{$type}{'ulp'}{$float}),
 719             "\n";
 720           }
 721         }
 722         print NEWULP "\n";
 723       }
 724     }
 725   }
 726   print NEWULP "# end of automatic generation\n";
 727   close NEWULP;
 728 }
 729
 730 sub get_ulps {
 731   my ($test, $type, $float) = @_;
 732
 733   return (exists $results{$test}{$type}{'ulp'}{$float}
 734           ? $results{$test}{$type}{'ulp'}{$float} : "0");
 735 }
 736
 737 # Return the ulps value for a single test.
 738 sub get_all_ulps_for_test {
 739   my ($test, $type) = @_;
 740   my ($ldouble, $double, $float, $ildouble, $idouble, $ifloat);
 741   my ($ulps_str);
 742
 743   if (exists $results{$test}{'has_ulps'}) {
 744     foreach $float (@all_floats) {
 745       $ulps_str .= &get_ulps ($test, $type, $float) . ", ";
 746     }
 747     return "{" . substr ($ulps_str, 0, -2) . "}";
 748   } else {
 749     die "get_all_ulps_for_test called for \"$test\" with no ulps\n";
 750   }
 751 }
 752
 753 # Print include file
 754 sub output_ulps {
 755   my ($file, $ulps_filename) = @_;
 756   my ($i, $fct, $type, $ulp, $ulp_real, $ulp_imag);
 757   my (%func_ulps, %func_real_ulps, %func_imag_ulps);
 758
 759   open ULP, ">$file" or die ("Can't open $file: $!");
 760
 761   print ULP "/* This file is automatically generated\n";
 762   print ULP "   from $ulps_filename with gen-libm-test.pl.\n";
 763   print ULP "   Don't change it - change instead the master files.  */\n\n";
 764
 765   print ULP "struct ulp_data\n";
 766   print ULP "{\n";
 767   print ULP "  const char *name;\n";
 768   print ULP "  FLOAT max_ulp[" . @all_floats . "];\n";
 769   print ULP "};\n\n";
 770
 771   for ($i = 0; $i <= $#all_floats; $i++) {
 772     $type = $all_floats[$i];
 773     print ULP "#define ULP_";
 774     if ($type =~ /^i/) {
 775       print ULP "I_";
 776       $type = substr $type, 1;
 777     }
 778     print ULP "$all_floats_pfx{$type} $i\n";
 779   }
 780
 781   foreach $fct (keys %results) {
 782     $type = $results{$fct}{'type'};
 783     if ($type eq 'normal') {
 784       $ulp = get_all_ulps_for_test ($fct, 'normal');
 785     } elsif ($type eq 'complex') {
 786       $ulp_real = get_all_ulps_for_test ($fct, 'real');
 787       $ulp_imag = get_all_ulps_for_test ($fct, 'imag');
 788     } else {
 789       die "unknown results ($fct) type $type\n";
 790     }
 791     if ($type eq 'normal') {
 792       $func_ulps{$fct} = $ulp;
 793     } else {
 794       $func_real_ulps{$fct} = $ulp_real;
 795       $func_imag_ulps{$fct} = $ulp_imag;
 796     }
 797   }
 798   print ULP "\n/* Maximal error of functions.  */\n";
 799   print ULP "static const struct ulp_data func_ulps[] =\n  {\n";
 800   foreach $fct (sort keys %func_ulps) {
 801     print ULP "    { \"$fct\", $func_ulps{$fct} },\n";
 802   }
 803   print ULP "  };\n";
 804   print ULP "static const struct ulp_data func_real_ulps[] =\n  {\n";
 805   foreach $fct (sort keys %func_real_ulps) {
 806     print ULP "    { \"$fct\", $func_real_ulps{$fct} },\n";
 807   }
 808   print ULP "  };\n";
 809   print ULP "static const struct ulp_data func_imag_ulps[] =\n  {\n";
 810   foreach $fct (sort keys %func_imag_ulps) {
 811     print ULP "    { \"$fct\", $func_imag_ulps{$fct} },\n";
 812   }
 813   print ULP "  };\n";
 814   close ULP;
 815 }
 816
 817 # Parse auto-libm-test-out.
 818 sub parse_auto_input {
 819   my ($file) = @_;
 820   open AUTO, $file or die ("Can't open $file: $!");
 821   while (<AUTO>) {
 822     chop;
 823     next if !/^= /;
 824     s/^= //;
 825     if (/^(\S+) (\S+) ([^:]*) : (.*)$/) {
 826       $auto_tests{$1}{$2}{$3} = $4;
 827     } else {
 828       die ("bad automatic test line: $_\n");
 829     }
 830   }
 831   close AUTO;
 832 }