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#!./perl
# These Config-dependent tests were originally in t/opbasic/arith.t,
# but moved here because t/opbasic/* should not depend on sophisticated
# constructs like "use Config;".
BEGIN {
chdir 't' if -d 't';
require './test.pl';
set_up_inc('../lib');
}
use Config;
use strict;
plan tests => 9;
my $vms_no_ieee;
if ($^O eq 'VMS') {
$vms_no_ieee = 1 unless defined($Config{useieee});
}
SKIP:
{
if ($^O eq 'vos') {
skip "VOS raises SIGFPE instead of producing infinity", 1;
}
elsif ($vms_no_ieee || !$Config{d_double_has_inf}) {
skip "the IEEE infinity model is unavailable in this configuration", 1;
}
elsif ($^O eq 'ultrix') {
skip "Ultrix enters deep nirvana instead of producing infinity.", 1;
}
# The computation of $v should overflow and produce "infinity"
# on any system whose max exponent is less than 10**1506.
# The exact string used to represent infinity varies by OS,
# so we don't test for it; all we care is that we don't die.
#
# Perl considers it to be an error if SIGFPE is raised.
# Chances are the interpreter will die, since it doesn't set
# up a handler for SIGFPE. That's why this test is last; to
# minimize the number of test failures. --PG
my $n = 5000;
my $v = 2;
while (--$n) {
$v *= 2;
}
pass("infinity");
}
# [perl #120426]
# small numbers shouldn't round to zero if they have extra floating digits
SKIP:
{
skip "not IEEE", 8 unless $Config{d_double_style_ieee};
ok 0.153e-305 != 0.0, '0.153e-305';
ok 0.1530e-305 != 0.0, '0.1530e-305';
ok 0.15300e-305 != 0.0, '0.15300e-305';
ok 0.153000e-305 != 0.0, '0.153000e-305';
ok 0.1530000e-305 != 0.0, '0.1530000e-305';
ok 0.1530001e-305 != 0.0, '0.1530001e-305';
ok 1.17549435100e-38 != 0.0, 'min single';
# For flush-to-zero systems this may flush-to-zero, see PERL_SYS_FPU_INIT
ok 2.2250738585072014e-308 != 0.0, 'min double';
}
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