12 *
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 "finitel.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(finitel,function)
33 #include "libm_synonyms.h"
34
35 ENTRY(finitel)
36 movl 12(%esp),%eax / %ax <-- sign&bexp(x)
37 testl $0x80000000,8(%esp) / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
38 jz .chk_denormal_or_0
39 notl %eax / not(bexp) = 0 iff bexp = all 1's
40 andl $0x00007fff,%eax / ZF <-- 1 iff not(bexp) = 0
41 jz .done / no jump if arg. is finite
42 movl $1,%eax / ansi needs %eax = 1
43 .done:
44 ret
45
46 .chk_denormal_or_0:
47 andl $0x00007fff,%eax / ZF <-- 1 iff bexp = 0 iff denormal or 0
48 jnz .unsupported / jump if arg has unsupported format
49 movl $1,%eax / ansi needs %eax = 1
50 ret
51
52 .unsupported:
53 movl $0,%eax / unsupported format does not represent
|
12 *
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 "finitel.s"
30
31 #include "libm.h"
32
33 ENTRY(finitel)
34 movl 12(%esp),%eax / %ax <-- sign&bexp(x)
35 testl $0x80000000,8(%esp) / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0
36 jz .chk_denormal_or_0
37 notl %eax / not(bexp) = 0 iff bexp = all 1's
38 andl $0x00007fff,%eax / ZF <-- 1 iff not(bexp) = 0
39 jz .done / no jump if arg. is finite
40 movl $1,%eax / ansi needs %eax = 1
41 .done:
42 ret
43
44 .chk_denormal_or_0:
45 andl $0x00007fff,%eax / ZF <-- 1 iff bexp = 0 iff denormal or 0
46 jnz .unsupported / jump if arg has unsupported format
47 movl $1,%eax / ansi needs %eax = 1
48 ret
49
50 .unsupported:
51 movl $0,%eax / unsupported format does not represent
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