/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2007 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: zend_multiply.h,v 1.10.2.1.2.2 2007/04/10 10:57:35 sniper Exp $ */ #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); \ long double __dres = (long double)(a) * (long double)(b); \ long double __delta = (long double) __lres - __dres; \ if ( ((usedval) = (( __dres + __delta ) != __dres))) { \ (dval) = __dres; \ } else { \ (lval) = __lres; \ } \ } while (0) #endif