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 "exp2l.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(exp2l,function)
33 #include "libm_synonyms.h"
34
35 ENTRY(exp2l)
36 movl 16(%rsp),%ecx / cx <--sign&bexp(x)
37 andl $0x7fff,%ecx / ecx <-- zero_xtnd(bexp(x))
38 cmpl $0x3fff,%ecx / Is |x| <= 1?
39 jb .shortcut / If so, take a shortcut.
40 je .check_tail / |x| may be slightly > 1
41 .general_case: / Here, |x| > 1 or x is NaN
42 cmpl $0x7fff,%ecx / bexp(|x|) = bexp(INF)?
43 je .not_finite / if so, x is not finite
44 .finite_non_special: / Here, 1 < |x| < INF
45 fldt 8(%rsp) / push arg
46 fld %st(0) / duplicate stack top
47 frndint / [x],x
48 fucomi %st(1),%st / x integral?
49 je .x_integral / branch if x integral
50 fxch / x, [x]
51 fsub %st(1),%st / x-[x], [x]
52 f2xm1 / 2**(x-[x])-1, [x]
53 fld1 / 1,2**(x-[x])-1, [x]
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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 "exp2l.s"
30
31 #include "libm.h"
32 LIBM_ANSI_PRAGMA_WEAK(exp2l,function)
33
34 ENTRY(exp2l)
35 movl 16(%rsp),%ecx / cx <--sign&bexp(x)
36 andl $0x7fff,%ecx / ecx <-- zero_xtnd(bexp(x))
37 cmpl $0x3fff,%ecx / Is |x| <= 1?
38 jb .shortcut / If so, take a shortcut.
39 je .check_tail / |x| may be slightly > 1
40 .general_case: / Here, |x| > 1 or x is NaN
41 cmpl $0x7fff,%ecx / bexp(|x|) = bexp(INF)?
42 je .not_finite / if so, x is not finite
43 .finite_non_special: / Here, 1 < |x| < INF
44 fldt 8(%rsp) / push arg
45 fld %st(0) / duplicate stack top
46 frndint / [x],x
47 fucomi %st(1),%st / x integral?
48 je .x_integral / branch if x integral
49 fxch / x, [x]
50 fsub %st(1),%st / x-[x], [x]
51 f2xm1 / 2**(x-[x])-1, [x]
52 fld1 / 1,2**(x-[x])-1, [x]
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