mirror of
https://github.com/php/php-src.git
synced 2024-12-02 06:13:40 +08:00
48 lines
2.0 KiB
C
48 lines
2.0 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2006 Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Sascha Schumann <sascha@schumann.cx> |
|
|
| Ard Biesheuvel <ard@ard.nu> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
#if defined(__i386__) && defined(__GNUC__)
|
|
|
|
#define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \
|
|
long __tmpvar; \
|
|
__asm__ ("imul %3,%0\n" \
|
|
"adc $0,%1" \
|
|
: "=r"(__tmpvar),"=r"(usedval) \
|
|
: "0"(a), "r"(b), "1"(0)); \
|
|
if (usedval) (dval) = (double) (a) * (double) (b); \
|
|
else (lval) = __tmpvar; \
|
|
} while (0)
|
|
|
|
#else
|
|
|
|
#define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \
|
|
long __lres = (a) * (b); \
|
|
double __dres = (double)(a) * (double)(b); \
|
|
double __delta = (double) __lres - __dres; \
|
|
if ( ((usedval) = (( __dres + __delta ) != __dres))) { \
|
|
(dval) = __dres; \
|
|
} else { \
|
|
(lval) = __lres; \
|
|
} \
|
|
} while (0)
|
|
|
|
#endif
|