1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Engine | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1998-2014 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 defined(__x86_64__) && defined(__GNUC__) 35 36 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 37 long __tmpvar; \ 38 __asm__ ("imul %3,%0\n" \ 39 "adc $0,%1" \ 40 : "=r"(__tmpvar),"=r"(usedval) \ 41 : "0"(a), "r"(b), "1"(0)); \ 42 if (usedval) (dval) = (double) (a) * (double) (b); \ 43 else (lval) = __tmpvar; \ 44 } while (0) 45 46 #elif SIZEOF_LONG == 4 && defined(HAVE_ZEND_LONG64) 47 48 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 49 zend_long64 __result = (zend_long64) (a) * (zend_long64) (b); \ 50 if (__result > LONG_MAX || __result < LONG_MIN) { \ 51 (dval) = (double) __result; \ 52 (usedval) = 1; \ 53 } else { \ 54 (lval) = (long) __result; \ 55 (usedval) = 0; \ 56 } \ 57 } while (0) 58 59 #else 60 61 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \ 62 long __lres = (a) * (b); \ 63 long double __dres = (long double)(a) * (long double)(b); \ 64 long double __delta = (long double) __lres - __dres; \ 65 if ( ((usedval) = (( __dres + __delta ) != __dres))) { \ 66 (dval) = __dres; \ 67 } else { \ 68 (lval) = __lres; \ 69 } \ 70 } while (0) 71 72 #endif 73
