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04d2905 add safe_emalloc
Sascha Schumann authored
1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
29ee03a @andigutmans - Apply Ard's patch to support multiplication & overflow on both 32bit
andigutmans authored
5 | Copyright (c) 1998-2004 Zend Technologies Ltd. (http://www.zend.com) |
04d2905 add safe_emalloc
Sascha Schumann authored
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 |
f68c7ff updating license information in the headers.
James Cox authored
9 | available through the world-wide-web at the following url: |
04d2905 add safe_emalloc
Sascha Schumann authored
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 +----------------------------------------------------------------------+
7aa832a Readd x86 implementation
Sascha Schumann authored
15 | Authors: Sascha Schumann <sascha@schumann.cx> |
16 | Ard Biesheuvel <ard@ard.nu> |
04d2905 add safe_emalloc
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17 +----------------------------------------------------------------------+
18 */
19
d0bfc13 - Missing $Id$ tag
foobar authored
20 /* $Id$ */
21
7aa832a Readd x86 implementation
Sascha Schumann authored
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 #else
35
29ee03a @andigutmans - Apply Ard's patch to support multiplication & overflow on both 32bit
andigutmans authored
36 #define ZEND_SIGNED_MULTIPLY_LONG(a, b, lval, dval, usedval) do { \
cedd029 @andigutmans - Improved patch for support multiplication on 64bit machines
andigutmans authored
37 long __lres = (a) * (b); \
38 double __dres = (double)(a) * (double)(b); \
39 double __delta = (double) __lres - __dres; \
40 if ( ((usedval) = (( __dres + __delta ) != __dres))) { \
41 (dval) = __dres; \
29ee03a @andigutmans - Apply Ard's patch to support multiplication & overflow on both 32bit
andigutmans authored
42 } else { \
cedd029 @andigutmans - Improved patch for support multiplication on 64bit machines
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43 (lval) = __lres; \
29ee03a @andigutmans - Apply Ard's patch to support multiplication & overflow on both 32bit
andigutmans authored
44 } \
04d2905 add safe_emalloc
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45 } while (0)
7aa832a Readd x86 implementation
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46
47 #endif
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