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 2005 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "exp10.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(exp10,function)
33 #include "libm_synonyms.h"
34
35 ENTRY(exp10)
36 movl 8(%esp),%ecx / ecx <-- hi_32(x)
37 andl $0x7fffffff,%ecx / ecx <-- hi_32(|x|)
38 cmpl $0x3fd34413,%ecx / Is |x| < log10(2)?
39 jb .shortcut / If so, take a shortcut.
40 je .check_tail / maybe |x| only slightly < log10(2)
41 cmpl $0x7ff00000,%ecx / hi_32(|x|) >= hi_32(INF)?
42 jae .not_finite / if so, x is not finite
43 .finite_non_special: / Here, log10(2) < |x| < INF
44 fldl 4(%esp) / push x (=arg)
45
46 subl $8,%esp / save RP and set round-to-64-bits
47 fstcw (%esp)
48 movw (%esp),%ax
49 movw %ax,4(%esp)
50 orw $0x0300,%ax
51 movw %ax,(%esp)
52 fldcw (%esp)
53
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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 2005 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 .file "exp10.s"
30
31 #include "libm.h"
32
33 ENTRY(exp10)
34 movl 8(%esp),%ecx / ecx <-- hi_32(x)
35 andl $0x7fffffff,%ecx / ecx <-- hi_32(|x|)
36 cmpl $0x3fd34413,%ecx / Is |x| < log10(2)?
37 jb .shortcut / If so, take a shortcut.
38 je .check_tail / maybe |x| only slightly < log10(2)
39 cmpl $0x7ff00000,%ecx / hi_32(|x|) >= hi_32(INF)?
40 jae .not_finite / if so, x is not finite
41 .finite_non_special: / Here, log10(2) < |x| < INF
42 fldl 4(%esp) / push x (=arg)
43
44 subl $8,%esp / save RP and set round-to-64-bits
45 fstcw (%esp)
46 movw (%esp),%ax
47 movw %ax,4(%esp)
48 orw $0x0300,%ax
49 movw %ax,(%esp)
50 fldcw (%esp)
51
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