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