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     # Argument passed via pointer.
 233     if ($descr[$i] =~ /p/) {
 234       next;
 235     }
 236     # &FLOAT, &int - simplify call by not showing argument.
 237     if ($descr[$i] =~ /F|I/) {
 238       next;
 239     }
 240     # complex
 241     if ($descr[$i] eq 'c') {
 242       $call_args .= $comma . &build_complex_beautify ($args[$current_arg], $args[$current_arg+1]);
 243       $current_arg += 2;
 244       next;
 245     }
 246
 247     die ("$descr[$i] is unknown");
 248   }
 249
 250   # Result
 251   @args_res = @args[$current_arg .. $#args];
 252   $num_res = 0;
 253   @descr = split //,$descr_res;
 254   foreach (@descr) {
 255     if ($_ =~ /f|i|l|L/) {
 256       ++$num_res;
 257     } elsif ($_ eq 'c') {
 258       $num_res += 2;
 259     } elsif ($_ eq 'b') {
 260       # boolean
 261       ++$num_res;
 262     } elsif ($_ eq '1') {
 263       ++$num_res;
 264     } else {
 265       die ("$_ is unknown");
 266     }
 267   }
 268   # consistency check
 269   if ($#args_res == $num_res - 1) {
 270     # One set of results for all rounding modes, no flags.
 271     @start_rm = ( 0, 0, 0, 0 );
 272   } elsif ($#args_res == $num_res) {
 273     # One set of results for all rounding modes, with flags.
 274     die ("wrong number of arguments")
 275       unless ($args_res[$#args_res] =~ /EXCEPTION|ERRNO|IGNORE_ZERO_INF_SIGN|TEST_NAN_SIGN|NO_TEST_INLINE|XFAIL_TEST/);
 276     @start_rm = ( 0, 0, 0, 0 );
 277   } elsif ($#args_res == 4 * $num_res + 3) {
 278     # One set of results per rounding mode, with flags.
 279     @start_rm = ( 0, $num_res + 1, 2 * $num_res + 2, 3 * $num_res + 3 );
 280   } else {
 281     die ("wrong number of arguments");
 282   }
 283
 284   # Put the C program line together
 285   # Reset some variables to start again
 286   $current_arg = 1;
 287   $call_args =~ s/\"/\\\"/g;
 288   $cline = "{ \"$call_args\"";
 289   @descr = split //,$descr_args;
 290   for ($i=0; $i <= $#descr; $i++) {
 291     # FLOAT, int, long int, long long int
 292     if ($descr[$i] =~ /f|j|i|l|L/) {
 293       if ($descr[$i] eq "f") {
 294         $cline .= ", " . &apply_lit ($args[$current_arg]);
 295       } else {
 296         $cline .= ", $args[$current_arg]";
 297       }
 298       $current_arg++;
 299       next;
 300     }
 301     # &FLOAT, &int, argument passed via pointer
 302     if ($descr[$i] =~ /F|I|p/) {
 303       next;
 304     }
 305     # complex
 306     if ($descr[$i] eq 'c') {
 307       $cline .= ", " . &apply_lit ($args[$current_arg]);
 308       $cline .= ", " . &apply_lit ($args[$current_arg+1]);
 309       $current_arg += 2;
 310       next;
 311     }
 312   }
 313
 314   @descr = split //,$descr_res;
 315   @plus_oflow = qw(max_value plus_infty max_value plus_infty);
 316   @minus_oflow = qw(minus_infty minus_infty -max_value -max_value);
 317   @plus_uflow = qw(plus_zero plus_zero plus_zero min_subnorm_value);
 318   @minus_uflow = qw(-min_subnorm_value minus_zero minus_zero minus_zero);
 319   @errno_plus_oflow = qw(0 ERRNO_ERANGE 0 ERRNO_ERANGE);
 320   @errno_minus_oflow = qw(ERRNO_ERANGE ERRNO_ERANGE 0 0);
 321   @errno_plus_uflow = qw(ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE 0);
 322   @errno_minus_uflow = qw(0 ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE);
 323   for ($rm = 0; $rm <= 3; $rm++) {
 324     $current_arg = $start_rm[$rm];
 325     $ignore_result_any = 0;
 326     $ignore_result_all = 1;
 327     $cline_res = "";
 328     @special = ();
 329     foreach (@descr) {
 330       if ($_ =~ /b|f|j|i|l|L/ ) {
 331         my ($result) = $args_res[$current_arg];
 332         if ($result eq "IGNORE") {
 333           $ignore_result_any = 1;
 334           $result = "0";
 335         } else {
 336           $ignore_result_all = 0;
 337         }
 338         if ($_ eq "f") {
 339           $result = apply_lit ($result);
 340         }
 341         $cline_res .= ", $result";
 342         $current_arg++;
 343       } elsif ($_ eq 'c') {
 344         my ($result1) = $args_res[$current_arg];
 345         if ($result1 eq "IGNORE") {
 346           $ignore_result_any = 1;
 347           $result1 = "0";
 348         } else {
 349           $ignore_result_all = 0;
 350         }
 351         my ($result2) = $args_res[$current_arg + 1];
 352         if ($result2 eq "IGNORE") {
 353           $ignore_result_any = 1;
 354           $result2 = "0";
 355         } else {
 356           $ignore_result_all = 0;
 357         }
 358         $result1 = apply_lit ($result1);
 359         $result2 = apply_lit ($result2);
 360         $cline_res .= ", $result1, $result2";
 361         $current_arg += 2;
 362       } elsif ($_ eq '1') {
 363         push @special, $args_res[$current_arg];
 364         ++$current_arg;
 365       }
 366     }
 367     if ($ignore_result_any && !$ignore_result_all) {
 368       die ("some but not all function results ignored\n");
 369     }
 370     # Determine whether any arguments or results, for any rounding
 371     # mode, are non-finite.
 372     $non_finite = ($args =~ /qnan_value|snan_value|plus_infty|minus_infty/);
 373     $test_snan = ($args =~ /snan_value/);
 374     # Add exceptions.
 375     $cline_res .= show_exceptions ($ignore_result_any,
 376                                    $non_finite,
 377                                    $test_snan,
 378                                    ($current_arg <= $#args_res)
 379                                    ? $args_res[$current_arg]
 380                                    : undef);
 381
 382     # special treatment for some functions
 383     $i = 0;
 384     foreach (@special) {
 385       ++$i;
 386       my ($extra_expected) = $_;
 387       my ($run_extra) = ($extra_expected ne "IGNORE" ? 1 : 0);
 388       if (!$run_extra) {
 389         $extra_expected = "0";
 390       } else {
 391         $extra_expected = apply_lit ($extra_expected);
 392       }
 393       $cline_res .= ", $run_extra, $extra_expected";
 394     }
 395     $cline_res =~ s/^, //;
 396     $cline_res =~ s/plus_oflow/$plus_oflow[$rm]/g;
 397     $cline_res =~ s/minus_oflow/$minus_oflow[$rm]/g;
 398     $cline_res =~ s/plus_uflow/$plus_uflow[$rm]/g;
 399     $cline_res =~ s/minus_uflow/$minus_uflow[$rm]/g;
 400     $cline_res =~ s/ERRNO_PLUS_OFLOW/$errno_plus_oflow[$rm]/g;
 401     $cline_res =~ s/ERRNO_MINUS_OFLOW/$errno_minus_oflow[$rm]/g;
 402     $cline_res =~ s/ERRNO_PLUS_UFLOW/$errno_plus_uflow[$rm]/g;
 403     $cline_res =~ s/ERRNO_MINUS_UFLOW/$errno_minus_uflow[$rm]/g;
 404     $cline .= ", { $cline_res }";
 405   }
 406   print $file "    $cline },\n";
 407 }
 408
 409 # Convert a condition from auto-libm-test-out to C form.
 410 sub convert_condition {
 411   my ($cond) = @_;
 412   my (@conds, $ret);
 413   @conds = split /:/, $cond;
 414   foreach (@conds) {
 415     s/-/_/g;
 416     s/^/TEST_COND_/;
 417   }
 418   $ret = join " && ", @conds;
 419   return "($ret)";
 420 }
 421
 422 # Return text to OR a value into an accumulated flags string.
 423 sub or_value {
 424   my ($cond) = @_;
 425   if ($cond eq "0") {
 426     return "";
 427   } else {
 428     return " | $cond";
 429   }
 430 }
 431
 432 # Return a conditional expression between two values.
 433 sub cond_value {
 434   my ($cond, $if, $else) = @_;
 435   if ($cond eq "1") {
 436     return $if;
 437   } elsif ($cond eq "0") {
 438     return $else;
 439   } else {
 440     return "($cond ? $if : $else)";
 441   }
 442 }
 443
 444 # Return text to OR a conditional expression between two values into
 445 # an accumulated flags string.
 446 sub or_cond_value {
 447   my ($cond, $if, $else) = @_;
 448   return or_value (cond_value ($cond, $if, $else));
 449 }
 450
 451 # Generate libm-test.c
 452 sub generate_testfile {
 453   my ($input, $output) = @_;
 454
 455   open INPUT, $input or die ("Can't open $input: $!");
 456   open OUTPUT, ">$output" or die ("Can't open $output: $!");
 457
 458   # Replace the special macros
 459   while (<INPUT>) {
 460     # AUTO_TESTS (function),
 461     if (/^\s*AUTO_TESTS_/) {
 462       my ($descr, $func, @modes, $auto_test, $num_auto_tests);
 463       my (@rm_tests, $rm, $i);
 464       @modes = qw(downward tonearest towardzero upward);
 465       ($descr, $func) = ($_ =~ /AUTO_TESTS_(\w+)\s*\((\w+)\)/);
 466       for ($rm = 0; $rm <= 3; $rm++) {
 467         $rm_tests[$rm] = [sort keys %{$auto_tests{$func}{$modes[$rm]}}];
 468       }
 469       $num_auto_tests = scalar @{$rm_tests[0]};
 470       for ($rm = 1; $rm <= 3; $rm++) {
 471         if ($num_auto_tests != scalar @{$rm_tests[$rm]}) {
 472           die ("inconsistent numbers of tests for $func\n");
 473         }
 474         for ($i = 0; $i < $num_auto_tests; $i++) {
 475           if ($rm_tests[0][$i] ne $rm_tests[$rm][$i]) {
 476             die ("inconsistent list of tests of $func\n");
 477           }
 478         }
 479       }
 480       if ($num_auto_tests == 0) {
 481         die ("no automatic tests for $func\n");
 482       }
 483       foreach $auto_test (@{$rm_tests[0]}) {
 484         my ($format, $inputs, $format_conv, $args_str);
 485         ($format, $inputs) = split / /, $auto_test, 2;
 486         $inputs =~ s/ /, /g;
 487         $format_conv = convert_condition ($format);
 488         print OUTPUT "#if $format_conv\n";
 489         $args_str = "$func, $inputs";
 490         for ($rm = 0; $rm <= 3; $rm++) {
 491           my ($auto_test_out, $outputs, $flags);
 492           my ($flags_conv, @flags, %flag_cond);
 493           $auto_test_out = $auto_tests{$func}{$modes[$rm]}{$auto_test};
 494           ($outputs, $flags) = split / : */, $auto_test_out;
 495           $outputs =~ s/ /, /g;
 496           @flags = split / /, $flags;
 497           foreach (@flags) {
 498             if (/^([^:]*):(.*)$/) {
 499               my ($flag, $cond);
 500               $flag = $1;
 501               $cond = convert_condition ($2);
 502               if (defined ($flag_cond{$flag})) {
 503                 if ($flag_cond{$flag} ne "1") {
 504                   $flag_cond{$flag} .= " || $cond";
 505                 }
 506               } else {
 507                 $flag_cond{$flag} = $cond;
 508               }
 509             } else {
 510               $flag_cond{$_} = "1";
 511             }
 512           }
 513           $flags_conv = "";
 514           if (defined ($flag_cond{"ignore-zero-inf-sign"})) {
 515             $flags_conv .= or_cond_value ($flag_cond{"ignore-zero-inf-sign"},
 516                                           "IGNORE_ZERO_INF_SIGN", "0");
 517           }
 518           if (defined ($flag_cond{"no-test-inline"})) {
 519             $flags_conv .= or_cond_value ($flag_cond{"no-test-inline"},
 520                                           "NO_TEST_INLINE", "0");
 521           }
 522           if (defined ($flag_cond{"xfail"})) {
 523             $flags_conv .= or_cond_value ($flag_cond{"xfail"},
 524                                           "XFAIL_TEST", "0");
 525           }
 526           my (@exc_list) = qw(divbyzero inexact invalid overflow underflow);
 527           my ($exc);
 528           foreach $exc (@exc_list) {
 529             my ($exc_expected, $exc_ok, $no_exc, $exc_cond, $exc_ok_cond);
 530             $exc_expected = "\U$exc\E_EXCEPTION";
 531             $exc_ok = "\U$exc\E_EXCEPTION_OK";
 532             $no_exc = "0";
 533             if ($exc eq "inexact") {
 534               $exc_ok = "0";
 535               $no_exc = "NO_INEXACT_EXCEPTION";
 536             }
 537             if (defined ($flag_cond{$exc})) {
 538               $exc_cond = $flag_cond{$exc};
 539             } else {
 540               $exc_cond = "0";
 541             }
 542             if (defined ($flag_cond{"$exc-ok"})) {
 543               $exc_ok_cond = $flag_cond{"$exc-ok"};
 544             } else {
 545               $exc_ok_cond = "0";
 546             }
 547             $flags_conv .= or_cond_value ($exc_cond,
 548                                           cond_value ($exc_ok_cond,
 549                                                       $exc_ok, $exc_expected),
 550                                           cond_value ($exc_ok_cond,
 551                                                       $exc_ok, $no_exc));
 552           }
 553           my ($errno_expected, $errno_unknown_cond);
 554           if (defined ($flag_cond{"errno-edom"})) {
 555             if ($flag_cond{"errno-edom"} ne "1") {
 556               die ("unexpected condition for errno-edom");
 557             }
 558             if (defined ($flag_cond{"errno-erange"})) {
 559               die ("multiple errno values expected");
 560             }
 561             $errno_expected = "ERRNO_EDOM";
 562           } elsif (defined ($flag_cond{"errno-erange"})) {
 563             if ($flag_cond{"errno-erange"} ne "1") {
 564               die ("unexpected condition for errno-erange");
 565             }
 566             $errno_expected = "ERRNO_ERANGE";
 567           } else {
 568             $errno_expected = "ERRNO_UNCHANGED";
 569           }
 570           if (defined ($flag_cond{"errno-edom-ok"})) {
 571             if (defined ($flag_cond{"errno-erange-ok"})
 572                 && ($flag_cond{"errno-erange-ok"}
 573                     ne $flag_cond{"errno-edom-ok"})) {
 574               $errno_unknown_cond = "($flag_cond{\"errno-edom-ok\"} || $flag_cond{\"errno-erange-ok\"})";
 575             } else {
 576               $errno_unknown_cond = $flag_cond{"errno-edom-ok"};
 577             }
 578           } elsif (defined ($flag_cond{"errno-erange-ok"})) {
 579             $errno_unknown_cond = $flag_cond{"errno-erange-ok"};
 580           } else {
 581             $errno_unknown_cond = "0";
 582           }
 583           $flags_conv .= or_cond_value ($errno_unknown_cond,
 584                                         "0", $errno_expected);
 585           if ($flags_conv eq "") {
 586             $flags_conv = ", NO_EXCEPTION";
 587           } else {
 588             $flags_conv =~ s/^ \|/,/;
 589           }
 590           $args_str .= ", $outputs$flags_conv";
 591         }
 592         &parse_args (\*OUTPUT, $descr, $args_str);
 593         print OUTPUT "#endif\n";
 594       }
 595       next;
 596     }
 597
 598     # TEST_...
 599     if (/^\s*TEST_/) {
 600       my ($descr, $args);
 601       chop;
 602       ($descr, $args) = ($_ =~ /TEST_(\w+)\s*\((.*)\)/);
 603       &parse_args (\*OUTPUT, $descr, $args);
 604       next;
 605     }
 606     print OUTPUT;
 607   }
 608   close INPUT;
 609   close OUTPUT;
 610 }
 611
 612
 613
 614 # Parse ulps file
 615 sub parse_ulps {
 616   my ($file) = @_;
 617   my ($test, $type, $float, $eps, $float_regex);
 618
 619   # Build a basic regex to match type entries in the
 620   # generated ULPS file.
 621   foreach my $ftype (@all_floats) {
 622     $float_regex .= "|" . $ftype;
 623   }
 624   $float_regex = "^" . substr ($float_regex, 1) . ":";
 625
 626   # $type has the following values:
 627   # "normal": No complex variable
 628   # "real": Real part of complex result
 629   # "imag": Imaginary part of complex result
 630   open ULP, $file  or die ("Can't open $file: $!");
 631   while (<ULP>) {
 632     chop;
 633     # ignore comments and empty lines
 634     next if /^#/;
 635     next if /^\s*$/;
 636     if (/^Function: /) {
 637       if (/Real part of/) {
 638         s/Real part of //;
 639         $type = 'real';
 640       } elsif (/Imaginary part of/) {
 641         s/Imaginary part of //;
 642         $type = 'imag';
 643       } else {
 644         $type = 'normal';
 645       }
 646       ($test) = ($_ =~ /^Function:\s*\"([a-zA-Z0-9_]+)\"/);
 647       next;
 648     }
 649     if (/$float_regex/) {
 650       ($float, $eps) = split /\s*:\s*/,$_,2;
 651
 652       if ($eps eq "0") {
 653         # ignore
 654         next;
 655       } else {
 656         if (!defined ($results{$test}{$type}{'ulp'}{$float})
 657             || $results{$test}{$type}{'ulp'}{$float} < $eps) {
 658           $results{$test}{$type}{'ulp'}{$float} = $eps;
 659           $results{$test}{'has_ulps'} = 1;
 660         }
 661       }
 662       if ($type =~ /^real|imag$/) {
 663         $results{$test}{'type'} = 'complex';
 664       } elsif ($type eq 'normal') {
 665         $results{$test}{'type'} = 'normal';
 666       }
 667       next;
 668     }
 669     print "Skipping unknown entry: `$_'\n";
 670   }
 671   close ULP;
 672 }
 673
 674
 675 # Clean up a floating point number
 676 sub clean_up_number {
 677   my ($number) = @_;
 678
 679   # Remove trailing zeros after the decimal point
 680   if ($number =~ /\./) {
 681     $number =~ s/0+$//;
 682     $number =~ s/\.$//;
 683   }
 684   return $number;
 685 }
 686
 687 # Output a file which can be read in as ulps file.
 688 sub print_ulps_file {
 689   my ($file) = @_;
 690   my ($test, $type, $float, $eps, $fct, $last_fct);
 691
 692   $last_fct = '';
 693   open NEWULP, ">$file" or die ("Can't open $file: $!");
 694   print NEWULP "# Begin of automatic generation\n";
 695   print NEWULP "\n# Maximal error of functions:\n";
 696
 697   foreach $fct (sort keys %results) {
 698     foreach $type ('real', 'imag', 'normal') {
 699       if (exists $results{$fct}{$type}) {
 700         if ($type eq 'normal') {
 701           print NEWULP "Function: \"$fct\":\n";
 702         } elsif ($type eq 'real') {
 703           print NEWULP "Function: Real part of \"$fct\":\n";
 704         } elsif ($type eq 'imag') {
 705           print NEWULP "Function: Imaginary part of \"$fct\":\n";
 706         }
 707         foreach $float (@all_floats) {
 708           if (exists $results{$fct}{$type}{'ulp'}{$float}) {
 709             print NEWULP "$float: ",
 710             &clean_up_number ($results{$fct}{$type}{'ulp'}{$float}),
 711             "\n";
 712           }
 713         }
 714         print NEWULP "\n";
 715       }
 716     }
 717   }
 718   print NEWULP "# end of automatic generation\n";
 719   close NEWULP;
 720 }
 721
 722 sub get_ulps {
 723   my ($test, $type, $float) = @_;
 724
 725   return (exists $results{$test}{$type}{'ulp'}{$float}
 726           ? $results{$test}{$type}{'ulp'}{$float} : "0");
 727 }
 728
 729 # Return the ulps value for a single test.
 730 sub get_all_ulps_for_test {
 731   my ($test, $type) = @_;
 732   my ($ldouble, $double, $float, $ildouble, $idouble, $ifloat);
 733   my ($ulps_str);
 734
 735   if (exists $results{$test}{'has_ulps'}) {
 736     foreach $float (@all_floats) {
 737       $ulps_str .= &get_ulps ($test, $type, $float) . ", ";
 738     }
 739     return "{" . substr ($ulps_str, 0, -2) . "}";
 740   } else {
 741     die "get_all_ulps_for_test called for \"$test\" with no ulps\n";
 742   }
 743 }
 744
 745 # Print include file
 746 sub output_ulps {
 747   my ($file, $ulps_filename) = @_;
 748   my ($i, $fct, $type, $ulp, $ulp_real, $ulp_imag);
 749   my (%func_ulps, %func_real_ulps, %func_imag_ulps);
 750
 751   open ULP, ">$file" or die ("Can't open $file: $!");
 752
 753   print ULP "/* This file is automatically generated\n";
 754   print ULP "   from $ulps_filename with gen-libm-test.pl.\n";
 755   print ULP "   Don't change it - change instead the master files.  */\n\n";
 756
 757   print ULP "struct ulp_data\n";
 758   print ULP "{\n";
 759   print ULP "  const char *name;\n";
 760   print ULP "  FLOAT max_ulp[" . @all_floats . "];\n";
 761   print ULP "};\n\n";
 762
 763   for ($i = 0; $i <= $#all_floats; $i++) {
 764     $type = $all_floats[$i];
 765     print ULP "#define ULP_";
 766     if ($type =~ /^i/) {
 767       print ULP "I_";
 768       $type = substr $type, 1;
 769     }
 770     print ULP "$all_floats_pfx{$type} $i\n";
 771   }
 772
 773   foreach $fct (keys %results) {
 774     $type = $results{$fct}{'type'};
 775     if ($type eq 'normal') {
 776       $ulp = get_all_ulps_for_test ($fct, 'normal');
 777     } elsif ($type eq 'complex') {
 778       $ulp_real = get_all_ulps_for_test ($fct, 'real');
 779       $ulp_imag = get_all_ulps_for_test ($fct, 'imag');
 780     } else {
 781       die "unknown results ($fct) type $type\n";
 782     }
 783     if ($type eq 'normal') {
 784       $func_ulps{$fct} = $ulp;
 785     } else {
 786       $func_real_ulps{$fct} = $ulp_real;
 787       $func_imag_ulps{$fct} = $ulp_imag;
 788     }
 789   }
 790   print ULP "\n/* Maximal error of functions.  */\n";
 791   print ULP "static const struct ulp_data func_ulps[] =\n  {\n";
 792   foreach $fct (sort keys %func_ulps) {
 793     print ULP "    { \"$fct\", $func_ulps{$fct} },\n";
 794   }
 795   print ULP "  };\n";
 796   print ULP "static const struct ulp_data func_real_ulps[] =\n  {\n";
 797   foreach $fct (sort keys %func_real_ulps) {
 798     print ULP "    { \"$fct\", $func_real_ulps{$fct} },\n";
 799   }
 800   print ULP "  };\n";
 801   print ULP "static const struct ulp_data func_imag_ulps[] =\n  {\n";
 802   foreach $fct (sort keys %func_imag_ulps) {
 803     print ULP "    { \"$fct\", $func_imag_ulps{$fct} },\n";
 804   }
 805   print ULP "  };\n";
 806   close ULP;
 807 }
 808
 809 # Parse auto-libm-test-out.
 810 sub parse_auto_input {
 811   my ($file) = @_;
 812   open AUTO, $file or die ("Can't open $file: $!");
 813   while (<AUTO>) {
 814     chop;
 815     next if !/^= /;
 816     s/^= //;
 817     if (/^(\S+) (\S+) ([^:]*) : (.*)$/) {
 818       $auto_tests{$1}{$2}{$3} = $4;
 819     } else {
 820       die ("bad automatic test line: $_\n");
 821     }
 822   }
 823   close AUTO;
 824 }