13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "isnanl.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(isnanl,function)
33 #include "libm_synonyms.h"
34
35 ENTRY(isnanl)
36 movl 12(%esp),%eax / ax <-- sign bit and exp
37 andl $0x00007fff,%eax
38 jz .not_nan / jump if exp is all 0
39 xorl $0x00007fff,%eax
40 jz .nan_or_inf / jump if exp is all 1
41 testl $0x80000000,8(%esp)
42 jz .got_nan / jump if leading bit is 0
43 movl $0,%eax
44 .not_nan:
45 ret
46 .nan_or_inf: / note that %eax = 0 from before
47 cmpl $0x80000000,8(%esp) / what is first half of significand?
48 jnz .got_nan / jump if not equal to 0x80000000
49 testl $0xffffffff,4(%esp) / is second half of significand 0?
50 jnz .got_nan / jump if not equal to 0
51 ret
52 .got_nan:
53 movl $1,%eax
|
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "isnanl.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(isnanl,function)
33
34 ENTRY(isnanl)
35 movl 12(%esp),%eax / ax <-- sign bit and exp
36 andl $0x00007fff,%eax
37 jz .not_nan / jump if exp is all 0
38 xorl $0x00007fff,%eax
39 jz .nan_or_inf / jump if exp is all 1
40 testl $0x80000000,8(%esp)
41 jz .got_nan / jump if leading bit is 0
42 movl $0,%eax
43 .not_nan:
44 ret
45 .nan_or_inf: / note that %eax = 0 from before
46 cmpl $0x80000000,8(%esp) / what is first half of significand?
47 jnz .got_nan / jump if not equal to 0x80000000
48 testl $0xffffffff,4(%esp) / is second half of significand 0?
49 jnz .got_nan / jump if not equal to 0
50 ret
51 .got_nan:
52 movl $1,%eax
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