1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Engine | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1998-2013 Zend Technologies Ltd. (http://www.zend.com) | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 2.00 of the Zend license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.zend.com/license/2_00.txt. | 11 | If you did not receive a copy of the Zend license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@zend.com so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Authors: Sascha Schumann <sascha@schumann.cx> | 16 | Ard Biesheuvel <ard@ard.nu> | 17 +----------------------------------------------------------------------+ 18 */ 19 20 /* $Id$ */ 21 22 #if defined(__i386__) && defined(__GNUC__) 23 24 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 25 long __tmpvar; \ 26 __asm__ ("imul %3,%0\n" \ 27 "adc $0,%1" \ 28 : "=r"(__tmpvar),"=r"(usedval) \ 29 : "0"(a), "r"(b), "1"(0)); \ 30 if (usedval) (dval) = (double) (a) * (double) (b); \ 31 else (lval) = __tmpvar; \ 32 } while (0) 33 34 #elif SIZEOF_LONG == 4 && defined(HAVE_ZEND_LONG64) 35 36 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 37 zend_long64 __result = (zend_long64) (a) * (zend_long64) (b); \ 38 if (__result > LONG_MAX || __result < LONG_MIN) { \ 39 (dval) = (double) __result; \ 40 (usedval) = 1; \ 41 } else { \ 42 (lval) = (long) __result; \ 43 (usedval) = 0; \ 44 } \ 45 } while (0) 46 47 #else 48 49 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 50 long __lres = (a) * (b); \ 51 long double __dres = (long double)(a) * (long double)(b); \ 52 long double __delta = (long double) __lres - __dres; \ 53 if ( ((usedval) = (( __dres + __delta ) != __dres))) { \ 54 (dval) = __dres; \ 55 } else { \ 56 (lval) = __lres; \ 57 } \ 58 } while (0) 59 60 #endif 61
