compiler_rt/lib/addvti3.c

/* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
 *
 *                     The LLVM Compiler Infrastructure
 *
 * This file is dual licensed under the MIT and the University of Illinois Open
 * Source Licenses. See LICENSE.TXT for details.
 *
 * ===----------------------------------------------------------------------===
 *
 * This file implements __addvti3 for the compiler_rt library.
 *
 * ===----------------------------------------------------------------------===
 */

#if __x86_64

#include "int_lib.h"

/* Returns: a + b */

/* Effects: aborts if a + b overflows */

ti_int
__addvti3(ti_int a, ti_int b)
{
    ti_int s = a + b;
    if (b >= 0)
    {
        if (s < a)
            compilerrt_abort();
    }
    else
    {
        if (s >= a)
            compilerrt_abort();
    }
    return s;
}

#endif
Revision:	5069
Committed:	Sat Jul 21 14:35:28 2012 UTC (11 years, 9 months ago) by laffer1
Content type:	text/plain
File size:	845 byte(s)
Log Message:	Import FreeBSD version of compiler_rt.
#	Content
1	/* ===-- addvti3.c - Implement __addvti3 -----------------------------------===
2	*
3	* The LLVM Compiler Infrastructure
4	*
5	* This file is dual licensed under the MIT and the University of Illinois Open
6	* Source Licenses. See LICENSE.TXT for details.
7	*
8	* ===----------------------------------------------------------------------===
9	*
10	* This file implements __addvti3 for the compiler_rt library.
11	*
12	* ===----------------------------------------------------------------------===
13	*/
14
15	#if __x86_64
16
17	#include "int_lib.h"
18
19	/* Returns: a + b */
20
21	/* Effects: aborts if a + b overflows */
22
23	ti_int
24	__addvti3(ti_int a, ti_int b)
25	{
26	ti_int s = a + b;
27	if (b >= 0)
28	{
29	if (s < a)
30	compilerrt_abort();
31	}
32	else
33	{
34	if (s >= a)
35	compilerrt_abort();
36	}
37	return s;
38	}
39
40	#endif