math/gen-libm-test.pl

   1 #!/usr/bin/perl -w
   2 # Copyright (C) 1999-2018 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}${test_snan}0";
 165   }
 166 }
 167
 168 # Apply the LIT(x) or ARG_LIT(x) macro to a literal floating point constant
 169 # and strip any existing suffix.
 170 sub _apply_lit {
 171   my ($macro, $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 "$macro (${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 ("LIT", $_);
 198   }
 199   return join (' ', @toks);
 200 }
 201
 202 # Likewise, but apply ARG_LIT for arguments to narrowing functions.
 203 sub apply_arglit {
 204   my ($lit) = @_;
 205   my @toks = split (/ /, $lit);
 206   foreach (@toks) {
 207     $_ = _apply_lit ("ARG_LIT", $_);
 208   }
 209   return join (' ', @toks);
 210 }
 211
 212 # Parse the arguments to TEST_x_y
 213 sub parse_args {
 214   my ($file, $descr, $args) = @_;
 215   my (@args, $descr_args, $descr_res, @descr);
 216   my ($current_arg, $cline, $cline_res, $i);
 217   my (@special);
 218   my ($call_args);
 219   my ($ignore_result_any, $ignore_result_all);
 220   my ($num_res, @args_res, @start_rm, $rm);
 221   my (@plus_oflow, @minus_oflow, @plus_uflow, @minus_uflow);
 222   my (@errno_plus_oflow, @errno_minus_oflow);
 223   my (@errno_plus_uflow, @errno_minus_uflow);
 224   my (@xfail_rounding_ibm128_libgcc);
 225   my ($non_finite, $test_snan);
 226
 227   ($descr_args, $descr_res) = split /_/,$descr, 2;
 228
 229   @args = split /,\s*/, $args;
 230
 231   $call_args = "";
 232
 233   # Generate first the string that's shown to the user
 234   $current_arg = 1;
 235   @descr = split //,$descr_args;
 236   for ($i = 0; $i <= $#descr; $i++) {
 237     my $comma = "";
 238     if ($current_arg > 1) {
 239       $comma = ', ';
 240     }
 241     # FLOAT, ARG_FLOAT, long double, int, unsigned int, long int, long long int
 242     if ($descr[$i] =~ /f|a|j|i|u|l|L/) {
 243       $call_args .= $comma . &beautify ($args[$current_arg]);
 244       ++$current_arg;
 245       next;
 246     }
 247     # Argument passed via pointer.
 248     if ($descr[$i] =~ /p/) {
 249       next;
 250     }
 251     # &FLOAT, &int - simplify call by not showing argument.
 252     if ($descr[$i] =~ /F|I/) {
 253       next;
 254     }
 255     # complex
 256     if ($descr[$i] eq 'c') {
 257       $call_args .= $comma . &build_complex_beautify ($args[$current_arg], $args[$current_arg+1]);
 258       $current_arg += 2;
 259       next;
 260     }
 261
 262     die ("$descr[$i] is unknown");
 263   }
 264
 265   # Result
 266   @args_res = @args[$current_arg .. $#args];
 267   $num_res = 0;
 268   @descr = split //,$descr_res;
 269   foreach (@descr) {
 270     if ($_ =~ /f|i|l|L|M|U/) {
 271       ++$num_res;
 272     } elsif ($_ eq 'c') {
 273       $num_res += 2;
 274     } elsif ($_ eq 'b') {
 275       # boolean
 276       ++$num_res;
 277     } elsif ($_ eq '1') {
 278       ++$num_res;
 279     } else {
 280       die ("$_ is unknown");
 281     }
 282   }
 283   # consistency check
 284   if ($#args_res == $num_res - 1) {
 285     # One set of results for all rounding modes, no flags.
 286     @start_rm = ( 0, 0, 0, 0 );
 287   } elsif ($#args_res == $num_res) {
 288     # One set of results for all rounding modes, with flags.
 289     die ("wrong number of arguments")
 290       unless ($args_res[$#args_res] =~ /EXCEPTION|ERRNO|IGNORE_ZERO_INF_SIGN|TEST_NAN_SIGN|NO_TEST_INLINE|XFAIL/);
 291     @start_rm = ( 0, 0, 0, 0 );
 292   } elsif ($#args_res == 4 * $num_res + 3) {
 293     # One set of results per rounding mode, with flags.
 294     @start_rm = ( 0, $num_res + 1, 2 * $num_res + 2, 3 * $num_res + 3 );
 295   } else {
 296     die ("wrong number of arguments");
 297   }
 298
 299   # Put the C program line together
 300   # Reset some variables to start again
 301   $current_arg = 1;
 302   $call_args =~ s/\"/\\\"/g;
 303   $cline = "{ \"$call_args\"";
 304   @descr = split //,$descr_args;
 305   for ($i=0; $i <= $#descr; $i++) {
 306     # FLOAT, ARG_FLOAT, long double, int, unsigned int, long int, long long int
 307     if ($descr[$i] =~ /f|a|j|i|u|l|L/) {
 308       if ($descr[$i] eq "f") {
 309         $cline .= ", " . &apply_lit ($args[$current_arg]);
 310       } elsif ($descr[$i] eq "a") {
 311         $cline .= ", " . &apply_arglit ($args[$current_arg]);
 312       } else {
 313         $cline .= ", $args[$current_arg]";
 314       }
 315       $current_arg++;
 316       next;
 317     }
 318     # &FLOAT, &int, argument passed via pointer
 319     if ($descr[$i] =~ /F|I|p/) {
 320       next;
 321     }
 322     # complex
 323     if ($descr[$i] eq 'c') {
 324       $cline .= ", " . &apply_lit ($args[$current_arg]);
 325       $cline .= ", " . &apply_lit ($args[$current_arg+1]);
 326       $current_arg += 2;
 327       next;
 328     }
 329   }
 330
 331   @descr = split //,$descr_res;
 332   @plus_oflow = qw(max_value plus_infty max_value plus_infty);
 333   @minus_oflow = qw(minus_infty minus_infty -max_value -max_value);
 334   @plus_uflow = qw(plus_zero plus_zero plus_zero min_subnorm_value);
 335   @minus_uflow = qw(-min_subnorm_value minus_zero minus_zero minus_zero);
 336   @errno_plus_oflow = qw(0 ERRNO_ERANGE 0 ERRNO_ERANGE);
 337   @errno_minus_oflow = qw(ERRNO_ERANGE ERRNO_ERANGE 0 0);
 338   @errno_plus_uflow = qw(ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE 0);
 339   @errno_minus_uflow = qw(0 ERRNO_ERANGE ERRNO_ERANGE ERRNO_ERANGE);
 340   @xfail_rounding_ibm128_libgcc = qw(XFAIL_IBM128_LIBGCC 0
 341                                      XFAIL_IBM128_LIBGCC XFAIL_IBM128_LIBGCC);
 342   for ($rm = 0; $rm <= 3; $rm++) {
 343     $current_arg = $start_rm[$rm];
 344     $ignore_result_any = 0;
 345     $ignore_result_all = 1;
 346     $cline_res = "";
 347     @special = ();
 348     foreach (@descr) {
 349       if ($_ =~ /b|f|j|i|l|L|M|U/ ) {
 350         my ($result) = $args_res[$current_arg];
 351         if ($result eq "IGNORE") {
 352           $ignore_result_any = 1;
 353           $result = "0";
 354         } else {
 355           $ignore_result_all = 0;
 356         }
 357         if ($_ eq "f") {
 358           $result = apply_lit ($result);
 359         }
 360         $cline_res .= ", $result";
 361         $current_arg++;
 362       } elsif ($_ eq 'c') {
 363         my ($result1) = $args_res[$current_arg];
 364         if ($result1 eq "IGNORE") {
 365           $ignore_result_any = 1;
 366           $result1 = "0";
 367         } else {
 368           $ignore_result_all = 0;
 369         }
 370         my ($result2) = $args_res[$current_arg + 1];
 371         if ($result2 eq "IGNORE") {
 372           $ignore_result_any = 1;
 373           $result2 = "0";
 374         } else {
 375           $ignore_result_all = 0;
 376         }
 377         $result1 = apply_lit ($result1);
 378         $result2 = apply_lit ($result2);
 379         $cline_res .= ", $result1, $result2";
 380         $current_arg += 2;
 381       } elsif ($_ eq '1') {
 382         push @special, $args_res[$current_arg];
 383         ++$current_arg;
 384       }
 385     }
 386     if ($ignore_result_any && !$ignore_result_all) {
 387       die ("some but not all function results ignored\n");
 388     }
 389     # Determine whether any arguments or results, for any rounding
 390     # mode, are non-finite.
 391     $non_finite = ($args =~ /qnan_value|snan_value|plus_infty|minus_infty/);
 392     $test_snan = ($args =~ /snan_value/);
 393     # Add exceptions.
 394     $cline_res .= show_exceptions ($ignore_result_any,
 395                                    $non_finite,
 396                                    $test_snan,
 397                                    ($current_arg <= $#args_res)
 398                                    ? $args_res[$current_arg]
 399                                    : undef);
 400
 401     # special treatment for some functions
 402     $i = 0;
 403     foreach (@special) {
 404       ++$i;
 405       my ($extra_expected) = $_;
 406       my ($run_extra) = ($extra_expected ne "IGNORE" ? 1 : 0);
 407       if (!$run_extra) {
 408         $extra_expected = "0";
 409       } else {
 410         $extra_expected = apply_lit ($extra_expected);
 411       }
 412       $cline_res .= ", $run_extra, $extra_expected";
 413     }
 414     $cline_res =~ s/^, //;
 415     $cline_res =~ s/plus_oflow/$plus_oflow[$rm]/g;
 416     $cline_res =~ s/minus_oflow/$minus_oflow[$rm]/g;
 417     $cline_res =~ s/plus_uflow/$plus_uflow[$rm]/g;
 418     $cline_res =~ s/minus_uflow/$minus_uflow[$rm]/g;
 419     $cline_res =~ s/ERRNO_PLUS_OFLOW/$errno_plus_oflow[$rm]/g;
 420     $cline_res =~ s/ERRNO_MINUS_OFLOW/$errno_minus_oflow[$rm]/g;
 421     $cline_res =~ s/ERRNO_PLUS_UFLOW/$errno_plus_uflow[$rm]/g;
 422     $cline_res =~ s/ERRNO_MINUS_UFLOW/$errno_minus_uflow[$rm]/g;
 423     $cline_res =~ s/XFAIL_ROUNDING_IBM128_LIBGCC/$xfail_rounding_ibm128_libgcc[$rm]/g;
 424     $cline .= ", { $cline_res }";
 425   }
 426   print $file "    $cline },\n";
 427 }
 428
 429 # Convert a condition from auto-libm-test-out to C form.
 430 sub convert_condition {
 431   my ($cond) = @_;
 432   my (@conds, $ret);
 433   @conds = split /:/, $cond;
 434   foreach (@conds) {
 435     if ($_ !~ /^arg_fmt\(/) {
 436       s/-/_/g;
 437     }
 438     s/^/TEST_COND_/;
 439   }
 440   $ret = join " && ", @conds;
 441   return "($ret)";
 442 }
 443
 444 # Return text to OR a value into an accumulated flags string.
 445 sub or_value {
 446   my ($cond) = @_;
 447   if ($cond eq "0") {
 448     return "";
 449   } else {
 450     return " | $cond";
 451   }
 452 }
 453
 454 # Return a conditional expression between two values.
 455 sub cond_value {
 456   my ($cond, $if, $else) = @_;
 457   if ($cond eq "1") {
 458     return $if;
 459   } elsif ($cond eq "0") {
 460     return $else;
 461   } else {
 462     return "($cond ? $if : $else)";
 463   }
 464 }
 465
 466 # Return text to OR a conditional expression between two values into
 467 # an accumulated flags string.
 468 sub or_cond_value {
 469   my ($cond, $if, $else) = @_;
 470   return or_value (cond_value ($cond, $if, $else));
 471 }
 472
 473 # Generate libm-test.c
 474 sub generate_testfile {
 475   my ($input, $output) = @_;
 476
 477   open INPUT, $input or die ("Can't open $input: $!");
 478   open OUTPUT, ">$output" or die ("Can't open $output: $!");
 479
 480   # Replace the special macros
 481   while (<INPUT>) {
 482     # AUTO_TESTS (function),
 483     if (/^\s*AUTO_TESTS_/) {
 484       my ($descr, $func, @modes, $auto_test, $num_auto_tests);
 485       my (@rm_tests, $rm, $i);
 486       @modes = qw(downward tonearest towardzero upward);
 487       ($descr, $func) = ($_ =~ /AUTO_TESTS_(\w+)\s*\((\w+)\)/);
 488       for ($rm = 0; $rm <= 3; $rm++) {
 489         $rm_tests[$rm] = [sort keys %{$auto_tests{$func}{$modes[$rm]}}];
 490       }
 491       $num_auto_tests = scalar @{$rm_tests[0]};
 492       for ($rm = 1; $rm <= 3; $rm++) {
 493         if ($num_auto_tests != scalar @{$rm_tests[$rm]}) {
 494           die ("inconsistent numbers of tests for $func\n");
 495         }
 496         for ($i = 0; $i < $num_auto_tests; $i++) {
 497           if ($rm_tests[0][$i] ne $rm_tests[$rm][$i]) {
 498             die ("inconsistent list of tests of $func\n");
 499           }
 500         }
 501       }
 502       if ($num_auto_tests == 0) {
 503         die ("no automatic tests for $func\n");
 504       }
 505       foreach $auto_test (@{$rm_tests[0]}) {
 506         my ($format, $inputs, $format_conv, $args_str);
 507         ($format, $inputs) = split / /, $auto_test, 2;
 508         $inputs =~ s/ /, /g;
 509         $format_conv = convert_condition ($format);
 510         print OUTPUT "#if $format_conv\n";
 511         $args_str = "$func, $inputs";
 512         for ($rm = 0; $rm <= 3; $rm++) {
 513           my ($auto_test_out, $outputs, $flags);
 514           my ($flags_conv, @flags, %flag_cond);
 515           $auto_test_out = $auto_tests{$func}{$modes[$rm]}{$auto_test};
 516           ($outputs, $flags) = split / : */, $auto_test_out;
 517           $outputs =~ s/ /, /g;
 518           @flags = split / /, $flags;
 519           foreach (@flags) {
 520             if (/^([^:]*):(.*)$/) {
 521               my ($flag, $cond);
 522               $flag = $1;
 523               $cond = convert_condition ($2);
 524               if (defined ($flag_cond{$flag})) {
 525                 if ($flag_cond{$flag} ne "1") {
 526                   $flag_cond{$flag} .= " || $cond";
 527                 }
 528               } else {
 529                 $flag_cond{$flag} = $cond;
 530               }
 531             } else {
 532               $flag_cond{$_} = "1";
 533             }
 534           }
 535           $flags_conv = "";
 536           if (defined ($flag_cond{"ignore-zero-inf-sign"})) {
 537             $flags_conv .= or_cond_value ($flag_cond{"ignore-zero-inf-sign"},
 538                                           "IGNORE_ZERO_INF_SIGN", "0");
 539           }
 540           if (defined ($flag_cond{"no-test-inline"})) {
 541             $flags_conv .= or_cond_value ($flag_cond{"no-test-inline"},
 542                                           "NO_TEST_INLINE", "0");
 543           }
 544           if (defined ($flag_cond{"xfail"})) {
 545             $flags_conv .= or_cond_value ($flag_cond{"xfail"},
 546                                           "XFAIL_TEST", "0");
 547           }
 548           my (@exc_list) = qw(divbyzero inexact invalid overflow underflow);
 549           my ($exc);
 550           foreach $exc (@exc_list) {
 551             my ($exc_expected, $exc_ok, $no_exc, $exc_cond, $exc_ok_cond);
 552             $exc_expected = "\U$exc\E_EXCEPTION";
 553             $exc_ok = "\U$exc\E_EXCEPTION_OK";
 554             $no_exc = "0";
 555             if ($exc eq "inexact") {
 556               $exc_ok = "0";
 557               $no_exc = "NO_INEXACT_EXCEPTION";
 558             }
 559             if (defined ($flag_cond{$exc})) {
 560               $exc_cond = $flag_cond{$exc};
 561             } else {
 562               $exc_cond = "0";
 563             }
 564             if (defined ($flag_cond{"$exc-ok"})) {
 565               $exc_ok_cond = $flag_cond{"$exc-ok"};
 566             } else {
 567               $exc_ok_cond = "0";
 568             }
 569             $flags_conv .= or_cond_value ($exc_cond,
 570                                           cond_value ($exc_ok_cond,
 571                                                       $exc_ok, $exc_expected),
 572                                           cond_value ($exc_ok_cond,
 573                                                       $exc_ok, $no_exc));
 574           }
 575           my ($errno_expected, $errno_unknown_cond);
 576           if (defined ($flag_cond{"errno-edom"})) {
 577             if ($flag_cond{"errno-edom"} ne "1") {
 578               die ("unexpected condition for errno-edom");
 579             }
 580             if (defined ($flag_cond{"errno-erange"})) {
 581               die ("multiple errno values expected");
 582             }
 583             $errno_expected = "ERRNO_EDOM";
 584           } elsif (defined ($flag_cond{"errno-erange"})) {
 585             if ($flag_cond{"errno-erange"} ne "1") {
 586               die ("unexpected condition for errno-erange");
 587             }
 588             $errno_expected = "ERRNO_ERANGE";
 589           } else {
 590             $errno_expected = "ERRNO_UNCHANGED";
 591           }
 592           if (defined ($flag_cond{"errno-edom-ok"})) {
 593             if (defined ($flag_cond{"errno-erange-ok"})
 594                 && ($flag_cond{"errno-erange-ok"}
 595                     ne $flag_cond{"errno-edom-ok"})) {
 596               $errno_unknown_cond = "($flag_cond{\"errno-edom-ok\"} || $flag_cond{\"errno-erange-ok\"})";
 597             } else {
 598               $errno_unknown_cond = $flag_cond{"errno-edom-ok"};
 599             }
 600           } elsif (defined ($flag_cond{"errno-erange-ok"})) {
 601             $errno_unknown_cond = $flag_cond{"errno-erange-ok"};
 602           } else {
 603             $errno_unknown_cond = "0";
 604           }
 605           $flags_conv .= or_cond_value ($errno_unknown_cond,
 606                                         "0", $errno_expected);
 607           if ($flags_conv eq "") {
 608             $flags_conv = ", NO_EXCEPTION";
 609           } else {
 610             $flags_conv =~ s/^ \|/,/;
 611           }
 612           $args_str .= ", $outputs$flags_conv";
 613         }
 614         &parse_args (\*OUTPUT, $descr, $args_str);
 615         print OUTPUT "#endif\n";
 616       }
 617       next;
 618     }
 619
 620     # TEST_...
 621     if (/^\s*TEST_/) {
 622       my ($descr, $args);
 623       chop;
 624       ($descr, $args) = ($_ =~ /TEST_(\w+)\s*\((.*)\)/);
 625       &parse_args (\*OUTPUT, $descr, $args);
 626       next;
 627     }
 628     print OUTPUT;
 629   }
 630   close INPUT;
 631   close OUTPUT;
 632 }
 633
 634
 635
 636 # Parse ulps file
 637 sub parse_ulps {
 638   my ($file) = @_;
 639   my ($test, $type, $float, $eps, $float_regex);
 640
 641   # Build a basic regex to match type entries in the
 642   # generated ULPS file.
 643   foreach my $ftype (@all_floats) {
 644     $float_regex .= "|" . $ftype;
 645   }
 646   $float_regex = "^" . substr ($float_regex, 1) . ":";
 647
 648   # $type has the following values:
 649   # "normal": No complex variable
 650   # "real": Real part of complex result
 651   # "imag": Imaginary part of complex result
 652   open ULP, $file  or die ("Can't open $file: $!");
 653   while (<ULP>) {
 654     chop;
 655     # ignore comments and empty lines
 656     next if /^#/;
 657     next if /^\s*$/;
 658     if (/^Function: /) {
 659       if (/Real part of/) {
 660         s/Real part of //;
 661         $type = 'real';
 662       } elsif (/Imaginary part of/) {
 663         s/Imaginary part of //;
 664         $type = 'imag';
 665       } else {
 666         $type = 'normal';
 667       }
 668       ($test) = ($_ =~ /^Function:\s*\"([a-zA-Z0-9_]+)\"/);
 669       next;
 670     }
 671     if (/$float_regex/) {
 672       ($float, $eps) = split /\s*:\s*/,$_,2;
 673
 674       if ($eps eq "0") {
 675         # ignore
 676         next;
 677       } else {
 678         if (!defined ($results{$test}{$type}{'ulp'}{$float})
 679             || $results{$test}{$type}{'ulp'}{$float} < $eps) {
 680           $results{$test}{$type}{'ulp'}{$float} = $eps;
 681           $results{$test}{'has_ulps'} = 1;
 682         }
 683       }
 684       if ($type =~ /^real|imag$/) {
 685         $results{$test}{'type'} = 'complex';
 686       } elsif ($type eq 'normal') {
 687         $results{$test}{'type'} = 'normal';
 688       }
 689       next;
 690     }
 691     print "Skipping unknown entry: `$_'\n";
 692   }
 693   close ULP;
 694 }
 695
 696
 697 # Clean up a floating point number
 698 sub clean_up_number {
 699   my ($number) = @_;
 700
 701   # Remove trailing zeros after the decimal point
 702   if ($number =~ /\./) {
 703     $number =~ s/0+$//;
 704     $number =~ s/\.$//;
 705   }
 706   return $number;
 707 }
 708
 709 # Output a file which can be read in as ulps file.
 710 sub print_ulps_file {
 711   my ($file) = @_;
 712   my ($test, $type, $float, $eps, $fct, $last_fct);
 713
 714   $last_fct = '';
 715   open NEWULP, ">$file" or die ("Can't open $file: $!");
 716   print NEWULP "# Begin of automatic generation\n";
 717   print NEWULP "\n# Maximal error of functions:\n";
 718
 719   foreach $fct (sort keys %results) {
 720     foreach $type ('real', 'imag', 'normal') {
 721       if (exists $results{$fct}{$type}) {
 722         if ($type eq 'normal') {
 723           print NEWULP "Function: \"$fct\":\n";
 724         } elsif ($type eq 'real') {
 725           print NEWULP "Function: Real part of \"$fct\":\n";
 726         } elsif ($type eq 'imag') {
 727           print NEWULP "Function: Imaginary part of \"$fct\":\n";
 728         }
 729         foreach $float (@all_floats) {
 730           if (exists $results{$fct}{$type}{'ulp'}{$float}) {
 731             print NEWULP "$float: ",
 732             &clean_up_number ($results{$fct}{$type}{'ulp'}{$float}),
 733             "\n";
 734           }
 735         }
 736         print NEWULP "\n";
 737       }
 738     }
 739   }
 740   print NEWULP "# end of automatic generation\n";
 741   close NEWULP;
 742 }
 743
 744 sub get_ulps {
 745   my ($test, $type, $float) = @_;
 746
 747   return (exists $results{$test}{$type}{'ulp'}{$float}
 748           ? $results{$test}{$type}{'ulp'}{$float} : "0");
 749 }
 750
 751 # Return the ulps value for a single test.
 752 sub get_all_ulps_for_test {
 753   my ($test, $type) = @_;
 754   my ($ldouble, $double, $float, $ildouble, $idouble, $ifloat);
 755   my ($ulps_str);
 756
 757   if (exists $results{$test}{'has_ulps'}) {
 758     foreach $float (@all_floats) {
 759       $ulps_str .= &get_ulps ($test, $type, $float) . ", ";
 760     }
 761     return "{" . substr ($ulps_str, 0, -2) . "}";
 762   } else {
 763     die "get_all_ulps_for_test called for \"$test\" with no ulps\n";
 764   }
 765 }
 766
 767 # Print include file
 768 sub output_ulps {
 769   my ($file, $ulps_filename) = @_;
 770   my ($i, $fct, $type, $ulp, $ulp_real, $ulp_imag);
 771   my (%func_ulps, %func_real_ulps, %func_imag_ulps);
 772
 773   open ULP, ">$file" or die ("Can't open $file: $!");
 774
 775   print ULP "/* This file is automatically generated\n";
 776   print ULP "   from $ulps_filename with gen-libm-test.pl.\n";
 777   print ULP "   Don't change it - change instead the master files.  */\n\n";
 778
 779   print ULP "struct ulp_data\n";
 780   print ULP "{\n";
 781   print ULP "  const char *name;\n";
 782   print ULP "  FLOAT max_ulp[" . @all_floats . "];\n";
 783   print ULP "};\n\n";
 784
 785   for ($i = 0; $i <= $#all_floats; $i++) {
 786     $type = $all_floats[$i];
 787     print ULP "#define ULP_";
 788     if ($type =~ /^i/) {
 789       print ULP "I_";
 790       $type = substr $type, 1;
 791     }
 792     print ULP "$all_floats_pfx{$type} $i\n";
 793   }
 794
 795   foreach $fct (keys %results) {
 796     $type = $results{$fct}{'type'};
 797     if ($type eq 'normal') {
 798       $ulp = get_all_ulps_for_test ($fct, 'normal');
 799     } elsif ($type eq 'complex') {
 800       $ulp_real = get_all_ulps_for_test ($fct, 'real');
 801       $ulp_imag = get_all_ulps_for_test ($fct, 'imag');
 802     } else {
 803       die "unknown results ($fct) type $type\n";
 804     }
 805     if ($type eq 'normal') {
 806       $func_ulps{$fct} = $ulp;
 807     } else {
 808       $func_real_ulps{$fct} = $ulp_real;
 809       $func_imag_ulps{$fct} = $ulp_imag;
 810     }
 811   }
 812   print ULP "\n/* Maximal error of functions.  */\n";
 813   print ULP "static const struct ulp_data func_ulps[] =\n  {\n";
 814   foreach $fct (sort keys %func_ulps) {
 815     print ULP "    { \"$fct\", $func_ulps{$fct} },\n";
 816   }
 817   print ULP "  };\n";
 818   print ULP "static const struct ulp_data func_real_ulps[] =\n  {\n";
 819   foreach $fct (sort keys %func_real_ulps) {
 820     print ULP "    { \"$fct\", $func_real_ulps{$fct} },\n";
 821   }
 822   print ULP "  };\n";
 823   print ULP "static const struct ulp_data func_imag_ulps[] =\n  {\n";
 824   foreach $fct (sort keys %func_imag_ulps) {
 825     print ULP "    { \"$fct\", $func_imag_ulps{$fct} },\n";
 826   }
 827   print ULP "  };\n";
 828   close ULP;
 829 }
 830
 831 # Parse auto-libm-test-out.
 832 sub parse_auto_input {
 833   my ($file) = @_;
 834   open AUTO, $file or die ("Can't open $file: $!");
 835   while (<AUTO>) {
 836     chop;
 837     next if !/^= /;
 838     s/^= //;
 839     if (/^(\S+) (\S+) ([^: ][^ ]* [^:]*) : (.*)$/) {
 840       $auto_tests{$1}{$2}{$3} = $4;
 841     } else {
 842       die ("bad automatic test line: $_\n");
 843     }
 844   }
 845   close AUTO;
 846 }