php-src/Zend/tests/dval_to_lval_32.phpt
Gustavo Lopes a86fcfbc1d Fix rounding of zend_dval_to_lval
Now rounding is always towards zero; the rounding can be though as if
occurring on the original double. Only relevant for the 32-bit long
variant.
2013-02-23 16:55:50 +00:00

33 lines
603 B
PHP

--TEST--
zend_dval_to_lval preserves low bits (32 bit long)
--SKIPIF--
<?php
if (PHP_INT_SIZE != 4)
die("skip for machines with 32-bit longs");
?>
--FILE--
<?php
/* test doubles around -4e21 */
$values = [
-4000000000000001048576.,
-4000000000000000524288.,
-4000000000000000000000.,
-3999999999999999475712.,
-3999999999999998951424.,
];
/* see if we're rounding negative numbers right */
$values[] = -2147483649.8;
foreach ($values as $v) {
var_dump((int)$v);
}
?>
--EXPECT--
int(-2056257536)
int(-2055733248)
int(-2055208960)
int(-2054684672)
int(-2054160384)
int(2147483647)